feat(notify): release v1.8.0 — Slack/Teams/Google Chat/Telegram/webhook notifications

- Add internal/notify package: best-effort release notifications to Slack, Microsoft Teams, Google Chat, Telegram, and a generic JSON webhook; every target is independently opt-in and a failed notification never fails the release
- Add notify config section (slack_webhook_url, teams_webhook_url, google_chat_webhook_url, telegram_bot_token/telegram_chat_id, webhook_url) with matching env var fallbacks; 100% coverage plus FuzzMessagePayloads
- Wire notification sending into run() — fires after tag+push (including --no-release), skipped on --no-push/--no-commit since nothing was published yet
- Document the notify section in README, Hugo docs, and .releaser.yml template; update CLAUDE.md architecture/fuzzing tables
- Also commit the Apache License 2.0 docs-site footer link (docs/hugo.toml geekdocContentLicense), left uncommitted from a prior change

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -37,4 +37,4 @@ jobs:
         run: go test ./...
 
       - name: build
-        run: go build ./cmd/...
+        run: go build -o /dev/null ./cmd/...

.gitea/workflows/docs.yml

@@ -0,0 +1,67 @@
+name: docs
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'docs/**'
+      - '.gitea/workflows/docs.yml'
+
+vars:
+  HUGO_VERSION: "0.128.2"
+  GEEKDOC_VERSION: "v4.1.1"
+
+jobs:
+  deploy:
+    name: Build and deploy docs
+    runs-on: ubuntu-latest
+    container:
+      image: alpine:latest
+
+    steps:
+      - name: Install tools
+        run: apk add --no-cache curl git tar
+
+      - name: Checkout
+        env:
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SERVER_URL: ${{ github.server_url }}
+          REPO: ${{ github.repository }}
+        run: |
+          git clone --depth 1 \
+            "$(echo "$SERVER_URL" | sed "s|https://|https://oauth2:${TOKEN}@|")/${REPO}.git" .
+
+      - name: Install Hugo
+        env:
+          HUGO_VERSION: ${{ vars.HUGO_VERSION }}
+        run: |
+          curl -sSL "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_${HUGO_VERSION}_Linux-64bit.tar.gz" \
+            | tar xz -C /usr/local/bin hugo
+
+      - name: Download Geekdoc theme
+        env:
+          GEEKDOC_VERSION: ${{ vars.GEEKDOC_VERSION }}
+        run: |
+          mkdir -p docs/themes/geekdoc
+          curl -sSL "https://github.com/thegeeklab/hugo-geekdoc/releases/download/${GEEKDOC_VERSION}/hugo-geekdoc.tar.gz" \
+            | tar xz -C docs/themes/geekdoc
+
+      - name: Build
+        run: hugo --source docs --destination public --minify
+
+      - name: Deploy to pages branch
+        env:
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SERVER_URL: ${{ github.server_url }}
+          REPO: ${{ github.repository }}
+        run: |
+          cd docs/public
+          git init
+          git config user.email "ci@git.k3nny.fr"
+          git config user.name "Gitea CI"
+          git add .
+          git commit -m "deploy docs $(date +%Y-%m-%dT%H:%M:%SZ)"
+          git push --force \
+            "$(echo "$SERVER_URL" | sed "s|https://|https://oauth2:${TOKEN}@|")/${REPO}.git" \
+            HEAD:gh-pages

.gitignore

@@ -1,8 +1,15 @@
 # build output
 /bin/
-releaser-*
+/releaser-*
 
 # test coverage
 coverage.out
 coverage.html
 
+# docs build artifacts (downloaded at build time)
+/docs/themes/
+/docs/public/
+
+# Task runner cache
+/.task/
+

.releaser.gitlab-ci.yml

@@ -45,5 +45,9 @@
         --branch "$CI_COMMIT_BRANCH"
         $RELEASER_EXTRA_ARGS
 
+  artifacts:
+    reports:
+      dotenv: release.env   # exposes NEXT_VERSION to downstream jobs
+
   environment:
     name: release/$CI_COMMIT_BRANCH

.releaser.yml

@@ -19,10 +19,58 @@ git:
   # author_name: ""
   # author_email: ""
 
-maven:
+  # Limit which commit types trigger a release (default: fix, feat, breaking).
-  # Path to pom.xml, relative to the repository root.
+  # releasable_types:
+  #   - fix
+  #   - feat
+  #   - breaking
+
+  # Configure which version component each commit type bumps.
+  # Valid values: "patch" (default) or "minor".
+  # bump_rules:
+  #   breaking: "minor"
+  #   feat: "patch"
+  #   fix: "patch"
+
+# maven:
+  # Single pom.xml path, relative to the repository root.
   # pom_path: "pom.xml"
 
+  # Multiple pom.xml paths for multi-module projects (overrides pom_path).
+  # pom_paths:
+  #   - "pom.xml"
+  #   - "module-a/pom.xml"
+
+# node:
+  # Single package.json path (node processing is opt-in — no default).
+  # package_json: "package.json"
+
+  # Multiple package.json paths for monorepos (overrides package_json).
+  # package_jsons:
+  #   - "packages/frontend/package.json"
+  #   - "packages/backend/package.json"
+
+# python:
+  # Single pyproject.toml path (opt-in — no default).
+  # Reads [project].version (PEP 621) first, then [tool.poetry].version.
+  # pyproject_toml: "pyproject.toml"
+
+  # Multiple pyproject.toml paths for monorepos (overrides pyproject_toml).
+  # pyproject_tomls:
+  #   - "pyproject.toml"
+  #   - "packages/cli/pyproject.toml"
+
+# gradle:
+  # Single build.gradle or build.gradle.kts path (opt-in — no default).
+  # Both Groovy DSL (single-quoted) and Kotlin DSL (double-quoted) are supported.
+  # build_file: "build.gradle"
+
+  # Multiple build files for multi-module projects (overrides build_file).
+  # build_files:
+  #   - "build.gradle"
+  #   - "module-a/build.gradle"
+  #   - "module-b/build.gradle"
+
 gitlab:
   # GitLab instance URL. Falls back to the CI_SERVER_URL environment variable.
   # url: "https://gitlab.example.com"

CHANGELOG.md

@@ -3,6 +3,161 @@
 All notable changes to this project will be documented in this file.
 Format: [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [1.8.0] - 2026-07-12
+
+### Added
+
+- **Release notifications** — new `internal/notify` package; best-effort notification on release to Slack, Microsoft Teams, Google Chat, Telegram, and/or a generic JSON webhook; every target is independently opt-in and a failed notification never fails the release
+- **`notify` config section** — `slack_webhook_url`, `teams_webhook_url`, `google_chat_webhook_url`, `telegram_bot_token` + `telegram_chat_id`, `webhook_url`; each also configurable via env var (`SLACK_WEBHOOK_URL`, `TEAMS_WEBHOOK_URL`, `GOOGLE_CHAT_WEBHOOK_URL`, `TELEGRAM_BOT_TOKEN`, `TELEGRAM_CHAT_ID`, `RELEASER_WEBHOOK_URL`)
+- **`FuzzMessagePayloads`** in `internal/notify` — 100% per-package statement coverage maintained across all 15 packages
+
+## [1.7.1] - 2026-07-12
+
+### Added
+
+- **Apache License 2.0** — `LICENSE` file added, Copyright 2026 K3nnyfr (alex@k3nny.fr); linked from a new `## License` section in README.md
+
+### Fixed
+
+- **`task docs:build` stale output** — Hugo build now passes `--cleanDestinationDir` so removed/renamed files don't linger in `docs/public`
+
+### Changed
+
+- **`.gitignore`** — `/.task/` (Task runner's local checksum cache) is now ignored
+
+## [1.7.0] - 2026-07-12
+
+### Added
+
+- **Python `pyproject.toml` support** — new `internal/pyproject` package; reads `[project].version` (PEP 621) first, then `[tool.poetry].version` (Poetry); original formatting preserved on write; `regexp.QuoteMeta` ensures safety with dot-containing version strings
+- **`python.pyproject_toml` / `python.pyproject_tomls` config** — opt-in, no default; `pyproject_tomls` list overrides `pyproject_toml` for monorepos; follows the established multi-value pattern (Maven, Node, Gradle)
+- **`--pyproject <path>` flag** — overrides `python.pyproject_toml` and clears `pyproject_tomls`; shown in verbose config table as `python.paths`
+- **`FuzzReadVersion` / `FuzzWriteVersion`** in `internal/pyproject` — 100% per-package statement coverage maintained across all 14 packages
+
+## [1.6.3] - 2026-07-11
+
+### Added
+
+- **Logo** — `docs/static/images/releaser-logo-1024.png` (1024×1024) set as Geekdoc site header logo via `geekdocLogo`; 128×128 version added to README above the release badge
+
+### Fixed
+
+- **`.gitignore` over-matching** — `releaser-*` was catching files inside `docs/static/images/`; anchored to `/releaser-*` so only root-level release binaries are excluded
+
+### Changed
+
+- **`docs/hugo.toml` `baseURL`** — set to `https://releaser.k3nny.fr/` (was `"/"`)
+
+## [1.6.2] - 2026-07-11
+
+### Changed
+
+- **`task ci` now runs `go tool staticcheck ./...`** — runs between `go vet` and `go test`; matches the step already present in the Gitea CI workflow
+
+### Fixed
+
+- **SA4006 in `TestLatestTagTagsIterFails`** — `err` from `gogit.PlainOpen` was assigned then immediately overwritten without being read; added the missing `if err != nil { t.Fatalf(...) }` check
+
+## [1.6.1] - 2026-07-11
+
+### Fixed
+
+- **CI root-permission failures** — four tests that used `os.Chmod` to force error paths were failing in Docker CI (which runs as root, where chmod has no enforcement effect); each now skips with `os.Getuid() == 0`; the gitutil test had broken skip logic that only fired if `Chmod` itself errored — replaced with the same upfront UID check
+
+## [1.6.0] - 2026-07-11
+
+### Added
+
+- **Gradle support** — new `internal/gradle` package; reads and writes the version assignment in `build.gradle` (Groovy DSL, single-quoted) and `build.gradle.kts` (Kotlin DSL, double-quoted); original quote style preserved on write; `regexp.QuoteMeta` ensures version strings with dots or special chars are safe
+- **`gradle.build_file` / `gradle.build_files` config** — opt-in, no default; `build_files` list overrides `build_file` for multi-module projects; follows the same multi-value pattern as `maven.pom_paths` and `node.package_jsons`
+- **`--gradle <path>` flag** — overrides `gradle.build_file` from config and clears `gradle.build_files`; mirrored in verbose config table as `gradle.paths`
+- **`FuzzReadVersion` / `FuzzWriteVersion`** in `internal/gradle` — 100% per-package statement coverage maintained across all 13 packages
+
+## [1.5.1] - 2026-07-11
+
+### Added
+
+- **Documentation site** — Hugo + Geekdoc theme; content covers installation, CLI reference, configuration, CI integration, and changelog; deployed to `gh-pages` via Gitea CI on push to `main`
+- **`docs:setup` / `docs:serve` / `docs:build` Taskfile tasks** — `docs:setup` downloads the Geekdoc theme bundle (idempotent); `docs:serve` runs Hugo with live reload; `docs:build` produces a minified static site
+- **`FuzzUpdate`** in `internal/changelog` — fuzzes arbitrary existing file content paired with a commit message, covering the `\n## [` insertion logic and idempotency guard
+- **`FuzzWriteVersion`** in `internal/node` — mirrors `FuzzReplaceProjectVersion` in `internal/maven`; fuzzes arbitrary JSON content with arbitrary old/new version strings
+
+### Changed
+
+- **CLAUDE.md** — new "Fuzzing" section: authoritative table of which packages require fuzz tests and why, list of exempt packages with rationale, seed corpus guidelines
+
+## [1.5.0] - 2026-07-11
+
+### Added
+
+- **Multi-module Maven support** — `maven.pom_paths: [...]` lists multiple `pom.xml` paths (e.g. root + sub-modules); overrides `pom_path`; each path is updated and committed in the same release commit
+- **Node.js `package.json` support** — opt-in via `node.package_json` (single path) or `node.package_jsons` (list, overrides the single path); version is bumped in-place alongside `pom.xml` and `CHANGELOG.md`
+- **`git.bump_rules` config** — controls which version component each commit type bumps: `breaking`, `feat`, `fix` each accept `"patch"` (default) or `"minor"`; allows e.g. `feat: "minor"` to bump the minor component instead of patch
+- **Injectable function vars in `cmd/main.go`** — `absPath`, `gitAllCommits`, `gitCommitsSince`, `gitCommitFiles` are now package-level vars overridable in tests to inject errors, enabling 100% per-package statement coverage across all 12 packages
+
+### Changed
+
+- **`--pom` flag** now clears `maven.pom_paths` before setting `maven.pom_path`, ensuring the CLI flag always wins over a multi-path config file entry
+- **`version.Next()` signature** — accepts a `map[commits.Type]semver.BumpLevel` bump-rules map as a sixth parameter; `nil` defaults to all-patch (no change to existing behaviour)
+- **Verbose config table** — now includes `git.bump_rules.breaking/feat/fix`, `maven.pom_paths` (effective list), and `node.paths` rows
+
+## [1.4.0] - 2026-07-11
+
+### Added
+
+- **GitHub release support** — new `internal/ghclient` package (minimal HTTP client, no SDK); configured via `github.token` + `github.repo` in `.releaser.yml` or `GITHUB_TOKEN` env var; GitHub takes precedence over GitLab when both are configured
+- **SSH agent push** — `gitutil.Push()` now attempts go-git SSH agent auth (`gitssh.NewSSHAgentAuth`) for `git@` / `ssh://` remotes before falling back to the system `git` binary; no extra configuration needed
+- **`--release-env-file` flag** — override the dotenv artifact path (relative to repo root; default `release.env`); pass `""` to disable writing the file entirely (e.g. for local runs)
+- **`git.releasable_types` config** — opt-in list of commit types that count as releasable (`fix`, `feat`, `breaking`); defaults to all three; useful for maintenance branches where some types should not trigger a release
+- **`commits.Group()`, `ExtractSubject()`, `ReleasableSet()`** — exported helpers in `internal/commits`; shared by `notes` and `changelog`, eliminating duplicated grouping and subject-extraction logic
+- **CHANGELOG deduplication guard** — `changelog.Update()` is now idempotent; skips the write if a `## [version]` section already exists, preventing duplicate entries on CI reruns
+- **Publisher interface** — `releasePublisher` interface + `buildPublisher()` in `cmd/main.go`; GitLab and GitHub are now interchangeable backends; new providers can be added without touching the orchestration logic
+- **`artifacts: reports: dotenv: release.env`** in `.releaser.gitlab-ci.yml` — exposes `NEXT_VERSION` to downstream GitLab CI jobs out of the box
+
+### Changed
+
+- **Always load config sources** — `LoadWithSources()` is now called unconditionally instead of only in `--verbose` mode; single code path, no behavioural difference
+- **`version.Next()` signature** — accepts a `map[commits.Type]bool` releasable set as a fifth parameter; `nil` defaults to all three types (no change to existing behaviour)
+- **Verbose config table** — now includes `git.releasable_types`, `github.token`, and `github.repo` rows
+
+## [1.3.0] - 2026-07-07
+
+### Added
+
+- **`release.env` dotenv artifact** — on every real release (not `--dry-run`) a `release.env` file is written to the repository root containing `NEXT_VERSION=<tag>`; the file is never committed, allowing GitLab CI to expose it as a dotenv artifact and pass the version to downstream jobs (deploy, notify, etc.)
+
+## [1.2.0] - 2026-07-07
+
+### Added
+
+- **`--verbose` flag** — prints a configuration table (each key, its value, and source: `default` / `config file` / `env: VARNAME` / `flag: --name`), lists every commit since the last tag with its parsed type and bump decision, and shows the final version choice; all output goes to stderr
+- **Colored, structured CLI output** — progress lines use `·` / `✓` / `!` prefix symbols; `--verbose` mode uses `▸` section headers (configuration / branch / commits / version); commit type column colored by kind (cyan=feat, green=fix, red=breaking); config source tags colored; respects `NO_COLOR` and `TERM=dumb`; auto-disabled when stderr is not a TTY
+- **Name and version header** — `releaser  vX.Y.Z` printed to stderr at the start of every invocation
+
+### Changed
+
+- **Default `tag_prefix` is now empty** — tags are bare version numbers (`1.2.3`) by default; add `tag_prefix: "v"` to `.releaser.yml` or pass `--tag-prefix v` to opt in to the `v`-prefixed convention
+
+## [1.1.0] - 2026-07-07
+
+### Added
+
+- **CHANGELOG.md auto-update** — every release now writes a new dated section to `CHANGELOG.md` (grouped by Breaking Changes / Added / Fixed), committed alongside `pom.xml` in the release commit; file is created if it does not exist
+- **`--changelog-file` flag** — override the default `CHANGELOG.md` path (e.g. `--changelog-file CHANGES.md`)
+- **`--init` flag** — scaffolds a fully-commented default `.releaser.yml` in the repository root; errors if the file already exists
+- **`CommitFiles`** in `gitutil` — internal helper that stages multiple files before a single commit, used to bundle `pom.xml` + `CHANGELOG.md` in one release commit
+
+### Fixed
+
+- **Push without token** — go-git's HTTPS transport does not use the system credential store; when `GITLAB_TOKEN` is unset the push now delegates to the `git` CLI so credential helpers, SSH agents, and `netrc` all work as expected
+
+## [0.4.2] - 2026-07-07
+
+### Fixed
+
+- **CI build step** — `go build ./cmd/...` failed with "output already exists and is a directory" because Go tried to write a binary named `cmd`, conflicting with the source directory; fixed by passing `-o /dev/null`
+- **Optional pom.xml** — releaser no longer fails when `pom.xml` (or the configured `maven.pom_path`) does not exist; it logs a notice and proceeds directly to tag and push, making the tool usable in non-Maven projects
+
 ## [0.4.0] - 2026-07-07
 
 ### Added

CLAUDE.md

@@ -0,0 +1,113 @@
+# CLAUDE.md — project guidelines for releaser
+
+## Overview
+
+`releaser` is a single-binary Go tool for GitFlow-based release automation. It targets Conventional Commits, versioned release branches (`release/X.Y`), and GitLab / GitHub release creation.
+
+## Architecture
+
+```
+cmd/main.go          — CLI entrypoint (cobra), run() pipeline, verbose output
+internal/branch/     — branch name parser → major/minor
+internal/changelog/  — CHANGELOG.md writer
+internal/commits/    — Conventional Commits parser (non-strict)
+internal/config/     — .releaser.yml loader + env var overlay + source tracking
+internal/ghclient/   — minimal GitHub Releases API client
+internal/gitutil/    — go-git helpers: tag discovery, commit walker, push
+internal/glclient/   — minimal GitLab Releases API client
+internal/gradle/     — build.gradle / build.gradle.kts version reader/writer
+internal/maven/      — pom.xml version reader/writer
+internal/node/       — package.json version reader/writer
+internal/notes/      — release notes body generator
+internal/notify/     — Slack / Teams / Google Chat / Telegram / webhook release notifications
+internal/pyproject/  — pyproject.toml version reader/writer
+internal/version/    — semver next-version calculator
+```
+
+## Code conventions
+
+- **No third-party test frameworks** — stdlib `testing` only.
+- **No interfaces for mocking** — inject function variables (`var absPath = filepath.Abs`) to test error paths.
+- **No comments explaining what** — only comments explaining *why* (hidden constraints, invariants, non-obvious workarounds).
+- **No error handling for impossible paths** — trust internal invariants; only validate at system boundaries.
+- **No abstractions ahead of need** — three similar lines beats a premature helper.
+
+## Test coverage
+
+**100% per-package statement coverage is required** across all packages. Run:
+
+```bash
+go test ./... -cover
+```
+
+Every package must show `coverage: 100.0% of statements`.
+
+Strategies used in this project:
+- **Error path injection**: override `var absPath`, `var gitAllCommits`, etc. to return injected errors.
+- **Filesystem tricks**: `os.Mkdir` where a file is expected (invisible to go-git dirty check; fails os.WriteFile/os.ReadFile); `os.Chmod(..., 0444)` to make files read-only.
+- **Null byte paths**: `"path\x00name"` causes `os.Stat` to return `EINVAL` (not `ErrNotExist`), useful for testing stat-error paths that differ from file-not-found.
+- **In-memory git repos**: use go-git `PlainInit` + local bare remote for push tests.
+- **Direct function calls**: call unexported helpers (e.g. `printVerboseConfig`) directly with crafted inputs to cover branches that are dead via normal CLI flow.
+
+## Fuzzing
+
+**Every package that parses free-form text or reads/writes arbitrary file content must have at least one fuzz test.** Run the full seed corpus with:
+
+```bash
+go test -run='^Fuzz' ./...
+```
+
+All seed cases must pass. The table below is authoritative — keep it in sync when adding packages or parsers:
+
+| Package | Fuzz target(s) | Why |
+|---------|---------------|-----|
+| `internal/branch` | `FuzzParse` | parses branch name strings |
+| `internal/changelog` | `FuzzUpdate` | rewrites arbitrary existing file content |
+| `internal/commits` | `FuzzParse` | parses arbitrary commit message strings |
+| `internal/gradle` | `FuzzReadVersion`, `FuzzWriteVersion` | reads/rewrites arbitrary Gradle build file content |
+| `internal/pyproject` | `FuzzReadVersion`, `FuzzWriteVersion` | reads/rewrites arbitrary pyproject.toml content |
+| `internal/glclient` | `FuzzEncodeProjectPath` | encodes arbitrary project path strings |
+| `internal/maven` | `FuzzReadVersion`, `FuzzReplaceProjectVersion` | reads/rewrites arbitrary XML file content |
+| `internal/node` | `FuzzReadVersion`, `FuzzWriteVersion` | reads/rewrites arbitrary JSON file content |
+| `internal/notes` | `FuzzGenerate` | generates notes from arbitrary commit messages |
+| `internal/notify` | `FuzzMessagePayloads` | builds notification JSON payloads from arbitrary release notes |
+
+Packages **not** requiring fuzz tests (no free-form text parsing): `internal/config` (yaml.v3 handles parsing), `internal/ghclient` (HTTP client, no text parsing), `internal/gitutil` (git operations), `internal/version` (typed inputs only), `cmd` (CLI orchestration). When adding a new package, check whether it parses text or rewrites files — if yes, add a row above.
+
+Fuzz seed corpus guidelines:
+- Include a realistic happy-path input as the first seed.
+- Include empty string, binary/non-UTF-8 bytes (`"\x00\xff"`), and inputs that stress known branches (e.g. existing `## [version]` heading for changelog).
+- The fuzz body must never assert on return values — only verify no panic.
+
+## Documentation sync
+
+**Every change that adds, changes, or removes a feature, flag, or config key must update all of the following in the same commit:**
+
+- `README.md` — features list, usage examples, option tables, version badge
+- `CHANGELOG.md` — new dated `## [X.Y.Z]` entry (see `/release` skill for format)
+- `ROADMAP.md` — mark shipped items `✓`, add a "Shipped in vX.Y.Z" note, drop outdated caveats
+- Hugo docs under `docs/content/` (`installation.md`, `usage.md`, `configuration.md`, `ci-integration.md`, `changelog.md`) — whichever pages describe the changed behavior
+
+Treat these as one unit: a PR that changes CLI behavior or config but leaves any of the above stale is incomplete. `docs/content/changelog.md` only needs an entry for tagged (minor/major) releases, matching the pattern already in that file — patch-only releases are covered by the root `CHANGELOG.md` but not duplicated there.
+
+## Dependency rules
+
+- **No new external dependencies** unless absolutely necessary. The project deliberately avoids pulling in large ecosystems.
+- go-git (`github.com/go-git/go-git/v5`) for all git operations.
+- cobra for CLI parsing.
+- gopkg.in/yaml.v3 for config.
+
+## Config design
+
+- New config fields go in the appropriate `*Config` struct in `internal/config/config.go`.
+- `defaultSources()` must be updated to include every new key.
+- `LoadWithSources` overlay detection must cover every new field.
+- `printVerboseConfig` in `cmd/main.go` must show every new config value.
+
+## Multi-value config pattern
+
+When a config supports both a single value and multiple values (like `pom_path` / `pom_paths`):
+- Single field: `PomPath string`
+- Multi field: `PomPaths []string`
+- `EffectivePomPaths()` method: `PomPaths` wins if non-empty, else `PomPath` if set, else default.
+- `--pom` CLI flag clears `PomPaths` and sets `PomPath` only.

LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
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README.md

@@ -1,53 +1,66 @@
 # releaser
 
-![release](https://img.shields.io/badge/release-v0.4.0-blue.svg)
+<img src="docs/static/images/releaser-logo-128.png" alt="releaser logo" width="128">
+
+![release](https://img.shields.io/badge/release-v1.8.0-blue.svg)
 
 A CI-friendly release automation tool for GitFlow workflows using Conventional Commits.
 
+**[Documentation](https://releaser.k3nny.fr)** · **[Repository](https://git.k3nny.fr/k3nny/releaser)**
+
 ## Problem
 
 Standard tools like `semantic-release` are designed for trunk-based development. In a GitFlow setup with versioned release branches (`release/1.1`, `release/1.2`), they either fail to respect the branch's version range or require brittle configuration.
 
-`releaser` is built for this exact workflow: it reads the branch name to pin the `major.minor`, parses Conventional Commits to determine the patch increment, and handles everything from `pom.xml` update to GitLab tag+release creation.
+`releaser` is built for this exact workflow: it reads the branch name to pin the `major.minor`, parses Conventional Commits to determine the patch increment, and handles everything from `pom.xml` update to GitLab/GitHub tag+release creation.
 
 ## How it works
 
 ```
 release/1.2 branch
-  └─ last tag: v1.2.3 (or none → start at v1.2.0)
+  └─ last tag: 1.2.3 (or none → start at 1.2.0)
        └─ commits since tag → Conventional Commits analysis
-            └─ next version: v1.2.4
+            └─ next version: 1.2.4
 ```
 
 1. **Branch parsing** — extracts `major.minor` from branch name (e.g. `release/1.2` → `1.2`)
 2. **Tag discovery** — finds the latest tag matching `major.minor.*` on the current branch
 3. **Commit analysis** — parses Conventional Commits between last tag and HEAD
 4. **Version bump** — increments patch (the minor is owned by the branch)
-5. **Release** — updates `pom.xml`, commits, tags, creates GitLab release
+5. **Release** — updates `pom.xml` / `package.json` / `build.gradle`, commits, tags, creates GitLab or GitHub release
+6. **Notify** — best-effort notification to Slack, Microsoft Teams, Google Chat, Telegram, and/or a generic webhook
 
 ## Version bump rules
 
-| Commit type      | Bump    | Notes                                      |
+By default, all releasable commits bump the **patch** component (minor is pinned to the branch). You can override this per commit type via `git.bump_rules` in `.releaser.yml`:
-|------------------|---------|--------------------------------------------|
+
-| `fix:`           | patch   |                                            |
+| Commit type      | Default | Configurable via `bump_rules`                  |
-| `feat:`          | patch   | minor is pinned to branch                  |
+|------------------|---------|------------------------------------------------|
-| `feat!:` / `BREAKING CHANGE` | patch | same — branch defines the minor boundary |
+| `fix:`           | patch   | `fix: "minor"` to bump minor instead           |
-| `chore:`, `docs:`, etc. | none |                                        |
+| `feat:`          | patch   | `feat: "minor"` to bump minor instead          |
+| `feat!:` / `BREAKING CHANGE` | patch | `breaking: "minor"` to bump minor  |
+| `chore:`, `docs:`, etc. | none   | —                                       |
 | unparseable msg  | none    | non-strict mode: silently ignored              |
 
 ## Usage
 
 ```bash
+# Scaffold a default .releaser.yml in the current repository
+releaser --init
+
 # Simulate next version (no side effects)
 releaser --dry-run
 
-# Full release: bump pom.xml, commit, tag, push, GitLab release
+# Full release: update pom.xml + CHANGELOG.md, commit, tag, push, create release
 releaser
 
-# Commit and tag locally — skip push and GitLab release
+# Commit and tag locally — skip push and release creation
 releaser --no-push
 
-# Update pom.xml but stop before committing (review first)
+# Push commit and tag but skip creating the release
+releaser --no-release
+
+# Update files but stop before committing (review first)
 releaser --no-commit
 # … then commit manually and re-run:
 releaser --tag-only
@@ -55,6 +68,12 @@ releaser --tag-only
 # Explicitly target a branch (useful in detached HEAD CI)
 releaser --branch release/1.2
 
+# Write changelog to a custom file
+releaser --changelog-file CHANGES.md
+
+# Show configuration sources, commit list, and version decision
+releaser --verbose --dry-run
+
 # Target a specific pom.xml
 releaser --pom path/to/pom.xml
 
@@ -63,6 +82,9 @@ releaser --tag-prefix ""
 
 # Override branch pattern (e.g. also match hotfix/ branches)
 releaser --branch-pattern "^(?:.*/)?(?:release|hotfix)/(\d+)\.(\d+)$"
+
+# Write dotenv artifact to a custom path (or "" to disable)
+releaser --release-env-file deploy/version.env
 ```
 
 ## Configuration
@@ -71,31 +93,79 @@ releaser --branch-pattern "^(?:.*/)?(?:release|hotfix)/(\d+)\.(\d+)$"
 
 ```yaml
 git:
-  tag_prefix: "v"                                    # set to "" for tags without prefix
+  tag_prefix: ""                                     # default: no prefix; set to "v" for v-prefixed tags
   branch_pattern: "^(?:.*/)?release/(\\d+)\\.(\\d+)$"  # two capture groups: major, minor
   commit_message: "chore(release): {version} [skip ci]"
   author_name: ""                                    # defaults to git config user.name
   author_email: ""                                   # defaults to git config user.email
+  releasable_types:                                  # default: all three
+    - fix
+    - feat
+    - breaking
+  bump_rules:                                        # which version component each type bumps
+    breaking: "patch"                                # "minor" to bump minor on breaking changes
+    feat: "patch"
+    fix: "patch"
 
 maven:
-  pom_path: "pom.xml"                                # relative to repo root
+  pom_path: "pom.xml"                                # single pom.xml, relative to repo root
+  # pom_paths:                                       # multi-module: list overrides pom_path
+  #   - "pom.xml"
+  #   - "module-a/pom.xml"
+  #   - "module-b/pom.xml"
+
+node:                                                # opt-in — no default; omit to skip
+  # package_json: "package.json"                     # single path
+  # package_jsons:                                   # monorepo: list overrides package_json
+  #   - "packages/frontend/package.json"
+  #   - "packages/backend/package.json"
+
+gradle:                                              # opt-in — no default; omit to skip
+  # build_file: "build.gradle"                       # Groovy or Kotlin DSL; single path
+  # build_files:                                     # multi-module: list overrides build_file
+  #   - "build.gradle"
+  #   - "module-a/build.gradle"
+
+python:                                              # opt-in — no default; omit to skip
+  # pyproject_toml: "pyproject.toml"                 # PEP 621 [project] or [tool.poetry]
+  # pyproject_tomls:                                 # monorepo: list overrides pyproject_toml
+  #   - "pyproject.toml"
+  #   - "packages/cli/pyproject.toml"
 
 gitlab:
   url: "https://gitlab.example.com"                  # or env CI_SERVER_URL
   token: ""                                          # env GITLAB_TOKEN (never commit this)
   project: ""                                        # env CI_PROJECT_ID or CI_PROJECT_PATH
+
+github:
+  token: ""                                          # env GITHUB_TOKEN (never commit this)
+  repo: ""                                           # "owner/repo" format
+
+notify:                                              # opt-in — every field independent; failures are warnings, not errors
+  # slack_webhook_url: ""                             # or env SLACK_WEBHOOK_URL
+  # teams_webhook_url: ""                             # or env TEAMS_WEBHOOK_URL
+  # google_chat_webhook_url: ""                       # or env GOOGLE_CHAT_WEBHOOK_URL
+  # telegram_bot_token: ""                            # or env TELEGRAM_BOT_TOKEN (both required)
+  # telegram_chat_id: ""                              # or env TELEGRAM_CHAT_ID
+  # webhook_url: ""                                   # generic {"version","notes"} JSON POST; or env RELEASER_WEBHOOK_URL
 ```
 
 ### Environment variables
 
-GitLab-related fields are automatically read from the CI environment if not set in the config file:
-
 | Variable           | Used for                          |
-|-------------------|-----------------------------------|
+|--------------------|-----------------------------------|
-| `GITLAB_TOKEN`    | API auth + HTTPS push auth        |
+| `GITLAB_TOKEN`     | GitLab API auth + HTTPS push auth |
 | `CI_SERVER_URL`    | GitLab instance URL               |
-| `CI_PROJECT_ID`   | Project identifier (numeric)      |
+| `CI_PROJECT_ID`    | GitLab project identifier (numeric) |
-| `CI_PROJECT_PATH` | Project identifier (fallback)     |
+| `CI_PROJECT_PATH`  | GitLab project identifier (fallback) |
+| `GITHUB_TOKEN`     | GitHub API auth                   |
+| `SLACK_WEBHOOK_URL` | Slack release notification       |
+| `TEAMS_WEBHOOK_URL` | Microsoft Teams release notification |
+| `GOOGLE_CHAT_WEBHOOK_URL` | Google Chat release notification |
+| `TELEGRAM_BOT_TOKEN` / `TELEGRAM_CHAT_ID` | Telegram release notification (both required) |
+| `RELEASER_WEBHOOK_URL` | Generic webhook release notification |
+
+When both `github.*` and `gitlab.*` are configured, GitHub takes precedence. All `notify.*` targets are independent — any combination may be configured at once, and a failed notification never fails the release.
 
 ## CI integration (GitLab CI example)
 
@@ -109,4 +179,11 @@ release:
     GITLAB_TOKEN: $RELEASE_TOKEN   # project/group CI variable with api + write_repository scope
   script:
     - releaser
+  artifacts:
+    reports:
+      dotenv: release.env          # exposes NEXT_VERSION to downstream jobs
 ```
+
+## License
+
+Apache License 2.0 — see [LICENSE](LICENSE).

ROADMAP.md

@@ -55,22 +55,36 @@
 - [x] Gitea release workflow (5-platform cross-compilation, release asset upload)
 - [x] 96% test coverage with real in-memory git repos and fuzz tests for all parsers
 
-## v0.5 — Changelog
+## v0.5 — Changelog ✅
 
-- [ ] `CHANGELOG.md` generation / append (grouped by commit type)
+- [x] `CHANGELOG.md` generation / append (grouped by commit type: Breaking Changes / Added / Fixed)
-- [ ] `--changelog-file` flag
+- [x] `--changelog-file` flag to use a custom filename
+- [x] `--init` flag to scaffold a default `.releaser.yml`
+- [x] Push falls back to system `git` CLI when no token is set (uses credential helpers, SSH, netrc)
 
 ## v1.0 — Production ready
 
 - [x] ~~Integration tests against a real Git repo (with fixture commits and tags)~~ — ✓ shipped v0.4.0 (96% coverage, real in-memory repos)
 - [x] ~~Cross-compilation in CI (linux/amd64, linux/arm64, darwin/amd64)~~ — ✓ shipped v0.4.0 (Gitea release workflow, + darwin/arm64 + windows/amd64)
-- [ ] Documentation site
+- [x] ~~`--verbose` flag~~ — ✓ shipped v1.2.0 (shows config sources, commit analysis, version decision)
+- [x] ~~Colored, structured CLI output~~ — ✓ shipped v1.2.0 (`·` / `✓` / `!` symbols, `▸` section headers in verbose, TTY-aware ANSI colors)
+- [x] ~~Name and version header on every run~~ — ✓ shipped v1.2.0
+- [x] ~~Default tag prefix changed to empty~~ — ✓ shipped v1.2.0 (bare `1.2.3` tags by default; opt in to `v` prefix via config)
+- [x] ~~`release.env` dotenv artifact~~ — ✓ shipped v1.3.0 (`NEXT_VERSION=<tag>` written on every release for GitLab CI downstream jobs)
+- [x] ~~GitHub release support~~ — ✓ shipped v1.4.0 (`internal/ghclient`, `GITHUB_TOKEN` env, `github.token`/`github.repo` config; GitHub takes precedence over GitLab)
+- [x] ~~SSH agent push~~ — ✓ shipped v1.4.0 (go-git `gitssh.NewSSHAgentAuth` for `git@`/`ssh://` remotes)
+- [x] ~~Configurable bump rules~~ — ✓ shipped v1.4.0 (`git.releasable_types` config; filter which commit types trigger a release)
+- [x] ~~Documentation site~~ — ✓ shipped v1.5.1 (Hugo + Geekdoc; installation, CLI reference, configuration, CI integration pages; deployed via Gitea CI to `gh-pages`)
+
+## v1.5 — Multi-module, Node.js, configurable bump rules ✅
+
+- [x] Multi-module Maven support (`maven.pom_paths: [...]` updates multiple `pom.xml` files in one release)
+- [x] `package.json` version bump for Node.js projects (`node.package_json` / `node.package_jsons`)
+- [x] Configurable bump rules per commit type (`git.bump_rules.breaking/feat/fix: "minor" | "patch"`)
+- [x] 100% per-package statement coverage across all 12 packages
 
 ## Future / backlog
 
-- GitHub release support (parity with GitLab)
+- ~~Gradle support (`build.gradle` / `build.gradle.kts`)~~ — ✓ shipped v1.6.0 (`internal/gradle`; Groovy + Kotlin DSL; multi-module via `gradle.build_files`; `--gradle` flag)
-- Multi-module Maven support (multiple `pom.xml` paths)
+- ~~Python `pyproject.toml` version bump (`[project].version` and `[tool.poetry].version`; single and multi-path like Maven's `pom_paths`)~~ — ✓ shipped v1.7.0 (`internal/pyproject`; PEP 621 + Poetry; `python.pyproject_tomls`; `--pyproject` flag)
-- Gradle support (`build.gradle` / `build.gradle.kts`)
+- ~~Slack / Teams notification on release~~ — ✓ shipped v1.8.0 (`internal/notify`; Slack, Microsoft Teams, Google Chat, Telegram, and generic webhook; each opt-in via `notify.*` config or env var; best-effort — never fails the release)
-- `package.json` version bump support (Node.js projects)
-- Slack / Teams notification on release
-- Configurable bump rules (e.g. treat `feat:` as minor on `main` branch)

Taskfile.yml

@@ -4,6 +4,7 @@ vars:
   BIN: ./bin/releaser
   PKG: ./...
   FUZZ_TIME: 30s
+  GEEKDOC_VERSION: "v4.1.1"
 
 tasks:
   default:
@@ -76,7 +77,7 @@ tasks:
       - go test -run='^Fuzz' {{.PKG}}
 
   ci:
-    desc: Full CI pipeline — tidy check, vet, test
+    desc: Full CI pipeline — tidy check, vet, staticcheck, test
     cmds:
       - task: tidy
       - |
@@ -85,6 +86,7 @@ tasks:
           exit 1
         fi
       - task: lint
+      - go tool staticcheck ./...
       - task: test
 
   clean:
@@ -105,3 +107,23 @@ tasks:
       TAG: '{{.TAG | default "releaser:dev"}}'
     cmds:
       - docker run --rm {{.TAG}} {{.CLI_ARGS}}
+
+  docs:setup:
+    desc: Download Geekdoc theme into docs/themes/geekdoc/
+    cmds:
+      - mkdir -p docs/themes/geekdoc
+      - curl -sSL "https://github.com/thegeeklab/hugo-geekdoc/releases/download/{{.GEEKDOC_VERSION}}/hugo-geekdoc.tar.gz" | tar xz -C docs/themes/geekdoc
+    status:
+      - test -f docs/themes/geekdoc/theme.toml
+
+  docs:serve:
+    desc: Serve docs locally with live reload (requires hugo)
+    deps: [docs:setup]
+    cmds:
+      - hugo server --source docs
+
+  docs:build:
+    desc: Build docs to docs/public/ (requires hugo)
+    deps: [docs:setup]
+    cmds:
+      - hugo --source docs --destination public --cleanDestinationDir --minify

cmd/main.go

@@ -12,15 +12,142 @@ import (
 	"github.com/spf13/cobra"
 
 	"git.k3nny.fr/releaser/internal/branch"
+	"git.k3nny.fr/releaser/internal/changelog"
 	"git.k3nny.fr/releaser/internal/commits"
 	"git.k3nny.fr/releaser/internal/config"
-	"git.k3nny.fr/releaser/internal/glclient"
+	"git.k3nny.fr/releaser/internal/ghclient"
 	"git.k3nny.fr/releaser/internal/gitutil"
+	"git.k3nny.fr/releaser/internal/glclient"
+	"git.k3nny.fr/releaser/internal/gradle"
 	"git.k3nny.fr/releaser/internal/maven"
+	"git.k3nny.fr/releaser/internal/pyproject"
+	"git.k3nny.fr/releaser/internal/node"
 	"git.k3nny.fr/releaser/internal/notes"
+	"git.k3nny.fr/releaser/internal/notify"
 	semver "git.k3nny.fr/releaser/internal/version"
 )
 
+const defaultConfigTemplate = `# .releaser.yml — configuration for git.k3nny.fr/releaser
+# All fields are optional. Uncomment and adjust what you need.
+# CLI flags always take precedence over values set here.
+
+git:
+  # Prefix prepended to every version tag (default: no prefix).
+  # tag_prefix: "v"
+
+  # Regex that identifies release branches. Must contain exactly two capture
+  # groups: group 1 = major version, group 2 = minor version.
+  # branch_pattern: "^(?:.*/)?release/(\\d+)\\.(\\d+)$"
+
+  # Template for the version-bump commit message.
+  # {version} is replaced with the full tag name (e.g. "v1.2.3").
+  # commit_message: "chore(release): {version} [skip ci]"
+
+  # Override the git commit author. When omitted, releaser reads user.name
+  # and user.email from the repository's git config.
+  # author_name: ""
+  # author_email: ""
+
+  # Limit which commit types trigger a release (default: fix, feat, breaking).
+  # releasable_types:
+  #   - fix
+  #   - feat
+  #   - breaking
+
+  # Configure which version component each commit type bumps.
+  # Valid values: "patch" (default) or "minor".
+  # bump_rules:
+  #   breaking: "minor"   # bump minor version instead of patch on breaking changes
+  #   feat: "patch"
+  #   fix: "patch"
+
+maven:
+  # Single pom.xml path, relative to the repository root.
+  # pom_path: "pom.xml"
+
+  # Multiple pom.xml paths for multi-module projects (overrides pom_path).
+  # pom_paths:
+  #   - "pom.xml"
+  #   - "module-a/pom.xml"
+  #   - "module-b/pom.xml"
+
+node:
+  # Single package.json path (node processing is opt-in — no default).
+  # package_json: "package.json"
+
+  # Multiple package.json paths for monorepos (overrides package_json).
+  # package_jsons:
+  #   - "package.json"
+  #   - "packages/frontend/package.json"
+  #   - "packages/backend/package.json"
+
+gradle:
+  # Single build.gradle or build.gradle.kts path (opt-in — no default).
+  # Both Groovy DSL (single-quoted) and Kotlin DSL (double-quoted) are supported.
+  # build_file: "build.gradle"
+
+  # Multiple build files for multi-module projects (overrides build_file).
+  # build_files:
+  #   - "build.gradle"
+  #   - "module-a/build.gradle"
+  #   - "module-b/build.gradle"
+
+python:
+  # Single pyproject.toml path (opt-in — no default).
+  # Reads [project].version (PEP 621) first, then [tool.poetry].version.
+  # pyproject_toml: "pyproject.toml"
+
+  # Multiple pyproject.toml paths for monorepos (overrides pyproject_toml).
+  # pyproject_tomls:
+  #   - "pyproject.toml"
+  #   - "packages/cli/pyproject.toml"
+  #   - "packages/lib/pyproject.toml"
+
+gitlab:
+  # GitLab instance URL. Falls back to the CI_SERVER_URL environment variable.
+  # url: "https://gitlab.example.com"
+
+  # Personal or CI access token with api scope.
+  # Falls back to the GITLAB_TOKEN environment variable.
+  # Tip: never commit a real token here — use the environment variable instead.
+  # token: ""
+
+  # Numeric project ID or "namespace/project" path.
+  # Falls back to CI_PROJECT_ID, then CI_PROJECT_PATH environment variables.
+  # project: ""
+
+github:
+  # GitHub personal access token with repo scope.
+  # Falls back to the GITHUB_TOKEN environment variable.
+  # token: ""
+
+  # Repository in "owner/repo" format.
+  # repo: ""
+
+notify:
+  # Every field below is opt-in. A target is only used when its required
+  # fields are set (via this file, or the matching environment variable).
+  # Notification failures never fail the release — they're logged as warnings.
+
+  # Slack incoming webhook URL. Falls back to SLACK_WEBHOOK_URL.
+  # slack_webhook_url: ""
+
+  # Microsoft Teams incoming webhook URL. Falls back to TEAMS_WEBHOOK_URL.
+  # teams_webhook_url: ""
+
+  # Google Chat incoming webhook URL. Falls back to GOOGLE_CHAT_WEBHOOK_URL.
+  # google_chat_webhook_url: ""
+
+  # Telegram bot token and chat ID — both required. Fall back to
+  # TELEGRAM_BOT_TOKEN and TELEGRAM_CHAT_ID.
+  # telegram_bot_token: ""
+  # telegram_chat_id: ""
+
+  # Generic webhook URL — POSTed a {"version": ..., "notes": ...} JSON body.
+  # Falls back to RELEASER_WEBHOOK_URL.
+  # webhook_url: ""
+`
+
 var (
 	version             = "dev" // overridden at build time via -ldflags "-X main.version=..."
 	errNothingToRelease = errors.New("nothing to release")
@@ -29,19 +156,55 @@ var (
 // exitFn is a variable so tests can intercept os.Exit calls.
 var exitFn = os.Exit
 
+// injectable function variables for testing error paths.
+var (
+	absPath        = filepath.Abs
+	gitAllCommits  = gitutil.AllCommits
+	gitCommitsSince = gitutil.CommitsSince
+	gitCommitFiles = gitutil.CommitFiles
+)
+
+// releasePublisher is implemented by both glclient and ghclient.
+type releasePublisher interface {
+	CreateRelease(ctx context.Context, tagName, body string) error
+}
+
+// buildPublisher selects and returns the active release publisher based on config.
+// GitHub takes precedence over GitLab when both are configured.
+// Returns (nil, nil) when no provider is configured — caller should skip release creation.
+func buildPublisher(cfg config.Config) (releasePublisher, error) {
+	if cfg.GitHub.Token != "" && cfg.GitHub.Repo != "" {
+		return ghclient.New(cfg.GitHub.Token, cfg.GitHub.Repo), nil
+	}
+	if cfg.GitLab.URL != "" && cfg.GitLab.Project != "" {
+		if cfg.GitLab.Token == "" {
+			return nil, fmt.Errorf("GITLAB_TOKEN not set — required for release creation")
+		}
+		return glclient.New(cfg.GitLab.URL, cfg.GitLab.Token, cfg.GitLab.Project), nil
+	}
+	return nil, nil
+}
+
 func newRootCmd() *cobra.Command {
 	var (
+		init_           bool
+		verbose         bool
 		dryRun          bool
 		noPush          bool
+		noRelease       bool
 		noCommit        bool
 		tagOnly         bool
 		branchOverride  string
 		repoPath        string
 		pomOverride     string
+		gradleOverride     string
+		pyprojectOverride  string
+		changelogFile      string
 		tagPrefixFlag   string
 		tagPrefixSet    bool
 		patternFlag     string
 		patternSet      bool
+		releaseEnvFile  string
 	)
 
 	root := &cobra.Command{
@@ -53,30 +216,44 @@ func newRootCmd() *cobra.Command {
 			tagPrefixSet = cmd.Flags().Changed("tag-prefix")
 			patternSet = cmd.Flags().Changed("branch-pattern")
 			return run(options{
+				init:           init_,
+				verbose:        verbose,
 				repoPath:       repoPath,
 				branchOverride: branchOverride,
 				pomOverride:    pomOverride,
+				gradleOverride:    gradleOverride,
+				pyprojectOverride: pyprojectOverride,
+				changelogFile:     changelogFile,
 				tagPrefixFlag:  tagPrefixFlag,
 				tagPrefixSet:   tagPrefixSet,
 				patternFlag:    patternFlag,
 				patternSet:     patternSet,
 				dryRun:         dryRun,
 				noPush:         noPush,
+				noRelease:      noRelease,
 				noCommit:       noCommit,
 				tagOnly:        tagOnly,
+				releaseEnvFile: releaseEnvFile,
 			})
 		},
 	}
 
+	root.Flags().BoolVar(&init_, "init", false, "create a default .releaser.yml in the repository and exit")
+	root.Flags().BoolVar(&verbose, "verbose", false, "print configuration sources, commit list, and version decision")
 	root.Flags().BoolVar(&dryRun, "dry-run", false, "print next version without making changes")
-	root.Flags().BoolVar(&noPush, "no-push", false, "create commit and tag locally without pushing or creating a GitLab release")
+	root.Flags().BoolVar(&noPush, "no-push", false, "create commit and tag locally without pushing or creating a release")
-	root.Flags().BoolVar(&noCommit, "no-commit", false, "update pom.xml but do not commit, tag, or push")
+	root.Flags().BoolVar(&noRelease, "no-release", false, "push commit and tag but skip creating the release")
-	root.Flags().BoolVar(&tagOnly, "tag-only", false, "tag HEAD without updating pom.xml (assumes version was already committed)")
+	root.Flags().BoolVar(&noCommit, "no-commit", false, "update files but do not commit, tag, or push")
+	root.Flags().BoolVar(&tagOnly, "tag-only", false, "tag HEAD without updating files (assumes version was already committed)")
 	root.Flags().StringVar(&branchOverride, "branch", "", "override branch name detection (required in detached HEAD)")
 	root.Flags().StringVar(&repoPath, "repo", ".", "path to git repository")
 	root.Flags().StringVar(&pomOverride, "pom", "", "override maven.pom_path from config")
+	root.Flags().StringVar(&gradleOverride, "gradle", "", "override gradle.build_file from config")
+	root.Flags().StringVar(&pyprojectOverride, "pyproject", "", "override python.pyproject_toml from config")
+	root.Flags().StringVar(&changelogFile, "changelog-file", "CHANGELOG.md", "path to changelog file relative to repo root")
 	root.Flags().StringVar(&tagPrefixFlag, "tag-prefix", "", "override git.tag_prefix from config")
 	root.Flags().StringVar(&patternFlag, "branch-pattern", "", "override git.branch_pattern from config")
+	root.Flags().StringVar(&releaseEnvFile, "release-env-file", "release.env", "write NEXT_VERSION dotenv to this path (relative to repo root; empty to disable)")
 
 	return root
 }
@@ -92,41 +269,189 @@ func main() {
 }
 
 type options struct {
+	init            bool
+	verbose         bool
 	repoPath        string
 	branchOverride  string
 	pomOverride     string
+	gradleOverride    string
+	pyprojectOverride string
+	changelogFile     string
 	tagPrefixFlag     string
 	tagPrefixSet    bool
 	patternFlag     string
 	patternSet      bool
 	dryRun          bool
 	noPush          bool
+	noRelease       bool
 	noCommit        bool
 	tagOnly         bool
+	releaseEnvFile  string
+}
+
+// maskedIfSet reports whether a secret-like config value is set, without
+// printing the value itself.
+func maskedIfSet(v string) string {
+	if v != "" {
+		return "(set)"
+	}
+	return "(not set)"
+}
+
+func printVerboseConfig(cfg config.Config, src config.Sources) {
+	logSection("configuration")
+	rows := []struct{ key, val string }{
+		{"git.tag_prefix", cfg.Git.TagPrefix},
+		{"git.branch_pattern", cfg.Git.BranchPattern},
+		{"git.commit_message", cfg.Git.CommitMessage},
+		{"git.author_name", cfg.Git.AuthorName},
+		{"git.author_email", cfg.Git.AuthorEmail},
+		{"git.releasable_types", func() string {
+			if len(cfg.Git.ReleasableTypes) == 0 {
+				return "(all)"
+			}
+			return strings.Join(cfg.Git.ReleasableTypes, ", ")
+		}()},
+		{"git.bump_rules.breaking", func() string {
+			if cfg.Git.BumpRules.Breaking == "" {
+				return "patch"
+			}
+			return cfg.Git.BumpRules.Breaking
+		}()},
+		{"git.bump_rules.feat", func() string {
+			if cfg.Git.BumpRules.Feat == "" {
+				return "patch"
+			}
+			return cfg.Git.BumpRules.Feat
+		}()},
+		{"git.bump_rules.fix", func() string {
+			if cfg.Git.BumpRules.Fix == "" {
+				return "patch"
+			}
+			return cfg.Git.BumpRules.Fix
+		}()},
+		{"maven.pom_paths", strings.Join(cfg.Maven.EffectivePomPaths(), ", ")},
+		{"node.paths", func() string {
+			paths := cfg.Node.EffectivePaths()
+			if len(paths) == 0 {
+				return "(not configured)"
+			}
+			return strings.Join(paths, ", ")
+		}()},
+		{"gradle.paths", func() string {
+			paths := cfg.Gradle.EffectiveBuildFiles()
+			if len(paths) == 0 {
+				return "(not configured)"
+			}
+			return strings.Join(paths, ", ")
+		}()},
+		{"python.paths", func() string {
+			paths := cfg.Python.EffectivePaths()
+			if len(paths) == 0 {
+				return "(not configured)"
+			}
+			return strings.Join(paths, ", ")
+		}()},
+		{"gitlab.url", cfg.GitLab.URL},
+		{"gitlab.token", maskedIfSet(cfg.GitLab.Token)},
+		{"gitlab.project", cfg.GitLab.Project},
+		{"github.token", maskedIfSet(cfg.GitHub.Token)},
+		{"github.repo", cfg.GitHub.Repo},
+		{"notify.slack_webhook_url", maskedIfSet(cfg.Notify.SlackWebhookURL)},
+		{"notify.teams_webhook_url", maskedIfSet(cfg.Notify.TeamsWebhookURL)},
+		{"notify.google_chat_webhook_url", maskedIfSet(cfg.Notify.GoogleChatWebhookURL)},
+		{"notify.telegram_bot_token", maskedIfSet(cfg.Notify.TelegramBotToken)},
+		{"notify.telegram_chat_id", maskedIfSet(cfg.Notify.TelegramChatID)},
+		{"notify.webhook_url", maskedIfSet(cfg.Notify.WebhookURL)},
+	}
+	for _, r := range rows {
+		source := src[r.key]
+		if source == "" {
+			source = "default"
+		}
+		val := r.val
+		if val == "" {
+			val = paint(ansiDim, "(empty)")
+		}
+		fmt.Fprintf(os.Stderr, "  %-25s = %-45s %s\n", r.key, val, fmtSource(source))
+	}
+}
+
+func initConfig(absRepo string) error {
+	path := filepath.Join(absRepo, ".releaser.yml")
+	if _, err := os.Stat(path); err == nil {
+		return fmt.Errorf(".releaser.yml already exists in %s — delete it first if you want to reset", absRepo)
+	}
+	if err := os.WriteFile(path, []byte(defaultConfigTemplate), 0644); err != nil {
+		return fmt.Errorf("write .releaser.yml: %w", err)
+	}
+	fmt.Printf("created %s\n", path)
+	return nil
+}
+
+func parseBumpRules(rules config.BumpRulesConfig) map[commits.Type]semver.BumpLevel {
+	m := map[commits.Type]semver.BumpLevel{}
+	if rules.Breaking == "minor" {
+		m[commits.TypeBreaking] = semver.BumpMinor
+	}
+	if rules.Feat == "minor" {
+		m[commits.TypeFeat] = semver.BumpMinor
+	}
+	if rules.Fix == "minor" {
+		m[commits.TypeFix] = semver.BumpMinor
+	}
+	return m
 }
 
 func run(o options) error {
+	logHeader(version)
+
 	// --- Config ---
-	absRepo, err := filepath.Abs(o.repoPath)
+	absRepo, err := absPath(o.repoPath)
 	if err != nil {
 		return fmt.Errorf("resolve repo path: %w", err)
 	}
 
-	cfg, err := config.Load(absRepo)
+	if o.init {
+		if o.verbose {
+			logStep("creating .releaser.yml in %s", absRepo)
+		}
+		return initConfig(absRepo)
+	}
+
+	cfg, src, err := config.LoadWithSources(absRepo)
 	if err != nil {
 		return err
 	}
-	cfg.ApplyEnv()
+	cfg.ApplyEnvWithSources(src)
 
 	// CLI flags take precedence over config file and env vars
 	if o.tagPrefixSet {
 		cfg.Git.TagPrefix = o.tagPrefixFlag
+		src["git.tag_prefix"] = "flag: --tag-prefix"
 	}
 	if o.pomOverride != "" {
 		cfg.Maven.PomPath = o.pomOverride
+		cfg.Maven.PomPaths = nil
+		src["maven.pom_paths"] = "flag: --pom"
+	}
+	if o.gradleOverride != "" {
+		cfg.Gradle.BuildFile = o.gradleOverride
+		cfg.Gradle.BuildFiles = nil
+		src["gradle.build_files"] = "flag: --gradle"
+	}
+	if o.pyprojectOverride != "" {
+		cfg.Python.PyprojectTOML = o.pyprojectOverride
+		cfg.Python.PyprojectTOMLs = nil
+		src["python.pyproject_tomls"] = "flag: --pyproject"
 	}
 	if o.patternSet {
 		cfg.Git.BranchPattern = o.patternFlag
+		src["git.branch_pattern"] = "flag: --branch-pattern"
+	}
+
+	if o.verbose {
+		printVerboseConfig(cfg, src)
 	}
 
 	// --- Git ---
@@ -149,6 +474,13 @@ func run(o options) error {
 	}
 	info.TagPrefix = cfg.Git.TagPrefix
 
+	if o.verbose {
+		logSection("branch")
+		fmt.Fprintf(os.Stderr, "  %s → major=%d, minor=%d %s\n",
+			paint(ansiBold, branchName), info.Major, info.Minor,
+			paint(ansiDim, "(pinned by branch)"))
+	}
+
 	// --- Dirty check (before any changes) ---
 	// Skipped in --no-commit mode: the user intentionally has changes in flight.
 	if !o.dryRun && !o.noCommit {
@@ -170,17 +502,21 @@ func run(o options) error {
 	// --- Commit range ---
 	var messages []string
 	if lastTag == "" {
-		fmt.Fprintln(os.Stderr, "info: no previous tag found — scanning all commits")
+		messages, err = gitAllCommits(repo)
-		messages, err = gitutil.AllCommits(repo)
 	} else {
-		fmt.Fprintf(os.Stderr, "info: last tag: %s\n", lastTag)
+		messages, err = gitCommitsSince(repo, lastTag)
-		messages, err = gitutil.CommitsSince(repo, lastTag)
 	}
 	if err != nil {
 		return fmt.Errorf("read commits: %w", err)
 	}
 
-	fmt.Fprintf(os.Stderr, "info: %d commit(s) to analyze\n", len(messages))
+	if !o.verbose {
+		if lastTag == "" {
+			logStep("no previous tag — scanning all %d commit(s)", len(messages))
+		} else {
+			logStep("last tag: %s  (%d commit(s) to analyze)", lastTag, len(messages))
+		}
+	}
 
 	// --- Version calculation ---
 	types := make([]commits.Type, len(messages))
@@ -188,36 +524,157 @@ func run(o options) error {
 		types[i] = commits.Parse(msg)
 	}
 
-	nextVersion, ok := semver.Next(info.Major, info.Minor, currentPatch, types)
+	if o.verbose {
+		logSection(fmt.Sprintf("commits (%d)", len(messages)))
+		if lastTag != "" {
+			fmt.Fprintf(os.Stderr, "  since: %s  (patch=%d)\n", paint(ansiCyan, lastTag), currentPatch)
+		}
+		for i, msg := range messages {
+			first := strings.SplitN(strings.TrimSpace(msg), "\n", 2)[0]
+			if len(first) > 70 {
+				first = first[:67] + "..."
+			}
+			t := types[i]
+			typeLabel := fmt.Sprintf("%-9s", t.String())
+			if t == commits.TypeNone {
+				fmt.Fprintf(os.Stderr, "  %s\n", paint(ansiDim, typeLabel+first))
+			} else {
+				var col string
+				switch t {
+				case commits.TypeBreaking:
+					col = ansiRed + ansiBold
+				case commits.TypeFeat:
+					col = ansiCyan
+				default: // fix
+					col = ansiGreen
+				}
+				fmt.Fprintf(os.Stderr, "  %s %s  %s\n",
+					paint(col, typeLabel), first, paint(ansiDim, "→ patch bump"))
+			}
+		}
+	}
+
+	releasable := commits.ReleasableSet(cfg.Git.ReleasableTypes)
+	nextVersion, ok := semver.Next(info.Major, info.Minor, currentPatch, types, releasable, parseBumpRules(cfg.Git.BumpRules))
 	if !ok {
-		fmt.Fprintln(os.Stderr, "info: no releasable commits found")
+		logWarn("no releasable commits found")
 		return errNothingToRelease
 	}
 
 	nextTag := info.TagName(nextVersion)
 
+	if o.verbose {
+		highestType := commits.TypeNone
+		for _, t := range types {
+			if t > highestType {
+				highestType = t
+			}
+		}
+		logSection("version")
+		fmt.Fprintf(os.Stderr, "  highest type: %s  →  next: %s  (tag: %s)\n",
+			paint(ansiCyan, highestType.String()),
+			paint(ansiBold, nextVersion),
+			paint(ansiBold+ansiCyan, nextTag))
+	}
+
 	fmt.Printf("next version: %s (tag: %s)\n", nextVersion, nextTag)
 
 	if o.dryRun {
-		fmt.Fprintln(os.Stderr, "dry-run: no changes made")
+		logStep("dry-run: no changes made")
 		return nil
 	}
 
-	// --- pom.xml (skipped with --tag-only) ---
+	// --- release.env (GitLab CI dotenv artifact) ---
+	if o.releaseEnvFile != "" {
+		releaseEnvPath := filepath.Join(absRepo, o.releaseEnvFile)
+		if err := os.WriteFile(releaseEnvPath, []byte("NEXT_VERSION="+nextTag+"\n"), 0644); err != nil {
+			return fmt.Errorf("write %s: %w", o.releaseEnvFile, err)
+		}
+		logDone("%s: NEXT_VERSION=%s", o.releaseEnvFile, nextTag)
+	}
+
+	// --- pom.xml + CHANGELOG.md (skipped with --tag-only) ---
 	if !o.tagOnly {
-		pomPath := filepath.Join(absRepo, cfg.Maven.PomPath)
+		var filesToCommit []string
+
+		// pom.xml (supports multi-module via pom_paths)
+		anyPom := false
+		for _, relPomPath := range cfg.Maven.EffectivePomPaths() {
+			pomPath := filepath.Join(absRepo, relPomPath)
+			_, statErr := os.Stat(pomPath)
+			hasPom := !errors.Is(statErr, os.ErrNotExist)
+			if statErr != nil && hasPom {
+				return fmt.Errorf("check pom path: %w", statErr)
+			}
+			if hasPom {
+				anyPom = true
 				currentPomVersion, err := maven.ReadVersion(pomPath)
 				if err != nil {
 					return fmt.Errorf("read pom version: %w", err)
 				}
-		fmt.Fprintf(os.Stderr, "info: pom.xml: %s → %s\n", currentPomVersion, nextVersion)
-
 				if err := maven.WriteVersion(pomPath, currentPomVersion, nextVersion); err != nil {
 					return fmt.Errorf("update pom version: %w", err)
 				}
+				logDone("%s: %s → %s", relPomPath, currentPomVersion, nextVersion)
+				filesToCommit = append(filesToCommit, relPomPath)
+			}
+		}
+		if !anyPom {
+			logWarn("no pom.xml — skipping version bump")
+		}
+
+		// package.json (opt-in via node.package_json / node.package_jsons)
+		for _, relPkgPath := range cfg.Node.EffectivePaths() {
+			pkgPath := filepath.Join(absRepo, relPkgPath)
+			currentNodeVersion, err := node.ReadVersion(pkgPath)
+			if err != nil {
+				return fmt.Errorf("read package.json version: %w", err)
+			}
+			if err := node.WriteVersion(pkgPath, currentNodeVersion, nextVersion); err != nil {
+				return fmt.Errorf("update package.json version: %w", err)
+			}
+			logDone("%s: %s → %s", relPkgPath, currentNodeVersion, nextVersion)
+			filesToCommit = append(filesToCommit, relPkgPath)
+		}
+
+		// build.gradle / build.gradle.kts (opt-in via gradle.build_file / gradle.build_files)
+		for _, relGradlePath := range cfg.Gradle.EffectiveBuildFiles() {
+			gradlePath := filepath.Join(absRepo, relGradlePath)
+			currentGradleVersion, err := gradle.ReadVersion(gradlePath)
+			if err != nil {
+				return fmt.Errorf("read gradle version: %w", err)
+			}
+			if err := gradle.WriteVersion(gradlePath, currentGradleVersion, nextVersion); err != nil {
+				return fmt.Errorf("update gradle version: %w", err)
+			}
+			logDone("%s: %s → %s", relGradlePath, currentGradleVersion, nextVersion)
+			filesToCommit = append(filesToCommit, relGradlePath)
+		}
+
+		// pyproject.toml (opt-in via python.pyproject_toml / python.pyproject_tomls)
+		for _, relPyprojectPath := range cfg.Python.EffectivePaths() {
+			pyprojectPath := filepath.Join(absRepo, relPyprojectPath)
+			currentPyVersion, err := pyproject.ReadVersion(pyprojectPath)
+			if err != nil {
+				return fmt.Errorf("read pyproject version: %w", err)
+			}
+			if err := pyproject.WriteVersion(pyprojectPath, currentPyVersion, nextVersion); err != nil {
+				return fmt.Errorf("update pyproject version: %w", err)
+			}
+			logDone("%s: %s → %s", relPyprojectPath, currentPyVersion, nextVersion)
+			filesToCommit = append(filesToCommit, relPyprojectPath)
+		}
+
+		// CHANGELOG.md
+		changelogAbsPath := filepath.Join(absRepo, o.changelogFile)
+		if err := changelog.Update(changelogAbsPath, nextTag, nextVersion, messages); err != nil {
+			return fmt.Errorf("update changelog: %w", err)
+		}
+		logDone("%s updated", o.changelogFile)
+		filesToCommit = append(filesToCommit, o.changelogFile)
 
 		if o.noCommit {
-			fmt.Printf("pom.xml updated to %s — commit manually then re-run with --tag-only\n", nextVersion)
+			fmt.Printf("files updated to %s — commit manually then re-run with --tag-only\n", nextVersion)
 			return nil
 		}
 
@@ -229,19 +686,18 @@ func run(o options) error {
 		if cfg.Git.AuthorEmail != "" {
 			authorEmail = cfg.Git.AuthorEmail
 		}
-
 		commitMsg := strings.ReplaceAll(cfg.Git.CommitMessage, "{version}", nextTag)
-		if _, err := gitutil.CommitFile(repo, cfg.Maven.PomPath, commitMsg, authorName, authorEmail); err != nil {
+		if _, err := gitCommitFiles(repo, filesToCommit, commitMsg, authorName, authorEmail); err != nil {
-			return fmt.Errorf("commit pom.xml: %w", err)
+			return fmt.Errorf("commit: %w", err)
 		}
-		fmt.Fprintf(os.Stderr, "info: committed: %s\n", commitMsg)
+		logDone("committed: %s", commitMsg)
 	}
 
 	// --- Git tag ---
 	if err := gitutil.CreateTag(repo, nextTag); err != nil {
 		return fmt.Errorf("create tag: %w", err)
 	}
-	fmt.Fprintf(os.Stderr, "info: tag created: %s\n", nextTag)
+	logDone("tag: %s", nextTag)
 
 	if o.noPush {
 		fmt.Printf("released %s locally — push manually with: git push && git push --tags\n", nextTag)
@@ -249,30 +705,52 @@ func run(o options) error {
 	}
 
 	// --- Push ---
-	fmt.Fprintln(os.Stderr, "info: pushing commit and tag...")
+	logStep("pushing commit and tag...")
 	if err := gitutil.Push(repo, branchName, nextTag, cfg.GitLab.Token); err != nil {
 		return fmt.Errorf("push: %w", err)
 	}
-	fmt.Fprintln(os.Stderr, "info: pushed")
+	logDone("pushed")
-
-	// --- GitLab release ---
-	if cfg.GitLab.URL == "" || cfg.GitLab.Project == "" {
-		fmt.Fprintln(os.Stderr, "warning: GitLab URL or project not configured — skipping release creation")
-		fmt.Printf("released %s\n", nextTag)
-		return nil
-	}
-	if cfg.GitLab.Token == "" {
-		return fmt.Errorf("GITLAB_TOKEN not set — required for release creation")
-	}
 
 	releaseNotes := notes.Generate(nextTag, messages)
-	gl := glclient.New(cfg.GitLab.URL, cfg.GitLab.Token, cfg.GitLab.Project)
 
-	if err := gl.CreateRelease(context.Background(), nextTag, releaseNotes); err != nil {
+	if o.noRelease {
-		return fmt.Errorf("create GitLab release: %w", err)
+		notifyRelease(cfg, nextTag, releaseNotes)
-	}
-
-	fmt.Fprintf(os.Stderr, "info: GitLab release created: %s\n", nextTag)
 		fmt.Printf("released %s\n", nextTag)
 		return nil
 	}
+
+	// --- Release creation ---
+	publisher, err := buildPublisher(cfg)
+	if err != nil {
+		return err
+	}
+	if publisher == nil {
+		logWarn("no release provider configured — skipping release creation")
+	} else {
+		if err := publisher.CreateRelease(context.Background(), nextTag, releaseNotes); err != nil {
+			return fmt.Errorf("create release: %w", err)
+		}
+		logDone("release created: %s", nextTag)
+	}
+
+	notifyRelease(cfg, nextTag, releaseNotes)
+	fmt.Printf("released %s\n", nextTag)
+	return nil
+}
+
+// notifyRelease sends best-effort release notifications to every configured
+// target. Failures are logged as warnings, not errors — the release itself
+// already succeeded by the time this runs.
+func notifyRelease(cfg config.Config, tagName, releaseNotes string) {
+	notifyCfg := notify.Config{
+		SlackWebhookURL:      cfg.Notify.SlackWebhookURL,
+		TeamsWebhookURL:      cfg.Notify.TeamsWebhookURL,
+		GoogleChatWebhookURL: cfg.Notify.GoogleChatWebhookURL,
+		TelegramBotToken:     cfg.Notify.TelegramBotToken,
+		TelegramChatID:       cfg.Notify.TelegramChatID,
+		WebhookURL:           cfg.Notify.WebhookURL,
+	}
+	for _, err := range notify.SendAll(context.Background(), notifyCfg, notify.Message{Version: tagName, Notes: releaseNotes}) {
+		logWarn("notification failed: %v", err)
+	}
+}

cmd/ui.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+const (
+	ansiReset  = "\033[0m"
+	ansiBold   = "\033[1m"
+	ansiDim    = "\033[2m"
+	ansiRed    = "\033[31m"
+	ansiGreen  = "\033[32m"
+	ansiYellow = "\033[33m"
+	ansiCyan   = "\033[36m"
+)
+
+var useColor bool
+
+func init() {
+	fi, err := os.Stderr.Stat()
+	tty := err == nil && (fi.Mode()&os.ModeCharDevice) != 0
+	useColor = tty && os.Getenv("NO_COLOR") == "" && os.Getenv("TERM") != "dumb"
+}
+
+func paint(code, s string) string {
+	if !useColor {
+		return s
+	}
+	return code + s + ansiReset
+}
+
+// logStep writes a neutral progress line to stderr.
+func logStep(format string, args ...any) {
+	msg := fmt.Sprintf(format, args...)
+	fmt.Fprintf(os.Stderr, "  %s %s\n", paint(ansiDim, "·"), msg)
+}
+
+// logDone writes a success completion line to stderr.
+func logDone(format string, args ...any) {
+	msg := fmt.Sprintf(format, args...)
+	fmt.Fprintf(os.Stderr, "  %s %s\n", paint(ansiGreen+ansiBold, "✓"), msg)
+}
+
+// logWarn writes a warning line to stderr.
+func logWarn(format string, args ...any) {
+	msg := fmt.Sprintf(format, args...)
+	fmt.Fprintf(os.Stderr, "  %s %s\n", paint(ansiYellow, "!"), msg)
+}
+
+// logHeader prints the tool name and version banner to stderr.
+func logHeader(ver string) {
+	fmt.Fprintf(os.Stderr, "%s  %s\n",
+		paint(ansiBold, "releaser"),
+		paint(ansiDim, "v"+ver))
+}
+
+// logSection writes a bold section header to stderr (used in verbose mode).
+func logSection(title string) {
+	fmt.Fprintf(os.Stderr, "\n%s\n", paint(ansiBold, "▸ "+title))
+}
+
+// fmtSource returns a colored "[source]" tag for a config key source.
+func fmtSource(src string) string {
+	switch {
+	case strings.HasPrefix(src, "env:"):
+		return paint(ansiCyan, "["+src+"]")
+	case strings.HasPrefix(src, "flag:"):
+		return paint(ansiGreen, "["+src+"]")
+	case src == "default":
+		return paint(ansiDim, "[default]")
+	default: // "config file"
+		return paint(ansiBold, "["+src+"]")
+	}
+}

docs/content/_index.md

@@ -0,0 +1,26 @@
+---
+title: releaser
+---
+
+**CI-friendly release automation for GitFlow workflows using Conventional Commits.**
+
+[Source code](https://git.k3nny.fr/k3nny/releaser) · [Releases](https://git.k3nny.fr/k3nny/releaser/releases)
+
+Standard tools like `semantic-release` are designed for trunk-based development. In a GitFlow setup with versioned release branches (`release/1.1`, `release/1.2`), they either fail to respect the branch's version range or require brittle configuration.
+
+`releaser` is built for this exact workflow: it reads the branch name to pin the `major.minor`, parses Conventional Commits to determine the patch increment, and handles everything from `pom.xml` / `package.json` update to GitLab/GitHub tag and release creation.
+
+## How it works
+
+```
+release/1.2 branch
+  └─ last tag: 1.2.3 (or none → start at 1.2.0)
+       └─ commits since tag → Conventional Commits analysis
+            └─ next version: 1.2.4
+```
+
+1. **Branch parsing** — extracts `major.minor` from branch name (`release/1.2` → `1.2`)
+2. **Tag discovery** — finds the latest tag matching `major.minor.*` on the current branch
+3. **Commit analysis** — parses Conventional Commits between last tag and HEAD
+4. **Version bump** — increments patch (or minor, if configured via `bump_rules`)
+5. **Release** — updates `pom.xml` / `package.json`, commits, tags, creates GitLab or GitHub release

docs/content/changelog.md

@@ -0,0 +1,88 @@
+---
+title: Changelog
+weight: 50
+---
+
+## v1.8.0 — 2026-07-12
+
+### Added
+
+- **Release notifications** — best-effort notification on release to Slack, Microsoft Teams, Google Chat, Telegram, and/or a generic JSON webhook via the new `notify` config section; every target is independently opt-in (config file or env var), and a failed notification never fails the release
+
+## v1.7.0 — 2026-07-12
+
+### Added
+
+- **Python `pyproject.toml` support** — opt-in via `python.pyproject_toml` (single) or `python.pyproject_tomls` (list); reads `[project].version` (PEP 621) first, then `[tool.poetry].version`; original formatting preserved; `--pyproject <path>` CLI flag for one-off overrides
+
+## v1.6.0 — 2026-07-11
+
+### Added
+
+- **Gradle support** — opt-in via `gradle.build_file` (single path) or `gradle.build_files` (list, overrides single); supports both Groovy DSL (`version = '1.2.3'`) and Kotlin DSL (`version = "1.2.3"`); original quote style preserved on write; `--gradle <path>` CLI flag for one-off overrides
+
+## v1.5.1 — 2026-07-11
+
+### Added
+
+- **Documentation site** — Hugo + Geekdoc; installation, CLI reference, configuration, CI integration, and changelog pages; deployed to `gh-pages` via Gitea CI on push to `main`
+- **`FuzzUpdate`** in `internal/changelog` and **`FuzzWriteVersion`** in `internal/node` — complete fuzz coverage for all file-rewriting packages
+
+### Changed
+
+- **CLAUDE.md** — fuzzing completeness guidelines with authoritative table
+
+## v1.5.0 — 2026-07-11
+
+### Added
+
+- **Multi-module Maven support** — `maven.pom_paths: [...]` lists multiple `pom.xml` paths; overrides `pom_path`; each path is updated and committed in the same release commit
+- **Node.js `package.json` support** — opt-in via `node.package_json` (single path) or `node.package_jsons` (list); version bumped in-place alongside `pom.xml` and `CHANGELOG.md`
+- **`git.bump_rules` config** — controls which version component each commit type bumps: `breaking`, `feat`, `fix` each accept `"patch"` (default) or `"minor"`
+- **100% per-package statement coverage** across all 12 packages via injectable function vars
+
+### Changed
+
+- **`--pom` flag** now clears `maven.pom_paths` before setting `maven.pom_path`
+- **`version.Next()` signature** — accepts a bump-rules map as a sixth parameter; `nil` defaults to all-patch
+- **Verbose config table** — now includes `git.bump_rules.*`, `maven.pom_paths`, and `node.paths` rows
+
+## v1.4.0 — 2026-07-11
+
+### Added
+
+- **GitHub release support** — `internal/ghclient` package; configured via `github.token` + `github.repo`; GitHub takes precedence over GitLab when both are configured
+- **SSH agent push** — go-git `gitssh.NewSSHAgentAuth` for `git@` / `ssh://` remotes
+- **`--release-env-file` flag** — override dotenv artifact path; pass `""` to disable
+- **`git.releasable_types` config** — opt-in list of commit types that count as releasable
+- **CHANGELOG deduplication guard** — `changelog.Update()` is idempotent; skips write if section already exists
+
+## v1.3.0 — 2026-07-07
+
+### Added
+
+- **`release.env` dotenv artifact** — written on every real release containing `NEXT_VERSION=<tag>`; never committed; exposes the version to downstream GitLab CI jobs
+
+## v1.2.0 — 2026-07-07
+
+### Added
+
+- **`--verbose` flag** — prints config table, commit list with parsed types, and version decision
+- **Colored, structured CLI output** — `·` / `✓` / `!` prefix symbols; TTY-aware ANSI colors; respects `NO_COLOR` and `TERM=dumb`
+- **Name and version header** on every invocation
+
+### Changed
+
+- **Default `tag_prefix` is now empty** — bare version numbers (`1.2.3`) by default; add `tag_prefix: "v"` to opt in
+
+## v1.1.0 — 2026-07-07
+
+### Added
+
+- **CHANGELOG.md auto-update** — new dated section written on every release, grouped by commit type
+- **`--changelog-file` flag** — override changelog path
+- **`--init` flag** — scaffolds a fully-commented `.releaser.yml`
+
+## v1.0 and earlier
+
+See the [full CHANGELOG](https://git.k3nny.fr/k3nny/releaser/src/branch/main/CHANGELOG.md) in the repository.

docs/content/ci-integration.md

@@ -0,0 +1,109 @@
+---
+title: CI Integration
+weight: 40
+---
+
+## GitLab CI
+
+The simplest setup uses the reusable job template shipped alongside `releaser`:
+
+```yaml
+# .gitlab-ci.yml
+include:
+  - project: releaser/releaser
+    file: .releaser.gitlab-ci.yml
+
+release:
+  extends: .releaser
+  variables:
+    GITLAB_TOKEN: $RELEASE_TOKEN   # project/group variable with api + write_repository scope
+```
+
+Or write it inline:
+
+```yaml
+release:
+  stage: release
+  image: registry.example.com/releaser:latest
+  rules:
+    - if: $CI_COMMIT_BRANCH =~ /^release\/.+$/
+  variables:
+    GITLAB_TOKEN: $RELEASE_TOKEN
+  script:
+    - releaser
+  artifacts:
+    reports:
+      dotenv: release.env          # exposes NEXT_VERSION to downstream jobs
+```
+
+### Consuming `NEXT_VERSION` downstream
+
+The `release.env` dotenv artifact exports `NEXT_VERSION=<tag>` automatically. Downstream jobs can use it:
+
+```yaml
+deploy:
+  stage: deploy
+  needs:
+    - job: release
+      artifacts: true
+  script:
+    - echo "Deploying version $NEXT_VERSION"
+```
+
+Disable the dotenv artifact (e.g. for local runs):
+
+```bash
+releaser --release-env-file ""
+```
+
+Write it to a custom path:
+
+```bash
+releaser --release-env-file deploy/version.env
+```
+
+## GitHub Actions / Gitea Actions
+
+```yaml
+name: release
+on:
+  push:
+    branches:
+      - 'release/**'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0          # full history needed for tag discovery
+
+      - name: Run releaser
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          curl -sSL https://git.k3nny.fr/k3nny/releaser/releases/latest/download/releaser-linux-amd64 \
+            -o /usr/local/bin/releaser
+          chmod +x /usr/local/bin/releaser
+          releaser
+```
+
+{{< hint warning >}}
+`fetch-depth: 0` is required. A shallow clone (`--depth 1`) hides the previous tag, causing `releaser` to treat every commit as the first release.
+{{< /hint >}}
+
+## Detached HEAD
+
+In CI environments where `git checkout` leaves the repository in detached HEAD state, pass the branch name explicitly:
+
+```yaml
+script:
+  - releaser --branch "$CI_COMMIT_BRANCH"
+```
+
+## SSH push
+
+When pushing over SSH (`git@host:...` or `ssh://...` remotes), `releaser` attempts go-git SSH agent auth automatically — no extra configuration needed as long as the CI runner has an SSH agent socket available.
+
+For HTTPS remotes without a token, `releaser` delegates to the system `git` binary so credential helpers and `netrc` work as expected.

docs/content/configuration.md

@@ -0,0 +1,213 @@
+---
+title: Configuration
+weight: 30
+---
+
+`releaser` reads `.releaser.yml` from the repository root. All fields are optional — missing values fall back to the defaults shown below. Run `releaser --init` to scaffold the file with annotations.
+
+## Full reference
+
+```yaml
+git:
+  tag_prefix: ""                                     # default: no prefix; "v" for v1.2.3 style
+  branch_pattern: "^(?:.*/)?release/(\\d+)\\.(\\d+)$"  # two capture groups: major, minor
+  commit_message: "chore(release): {version} [skip ci]"
+  author_name: ""                                    # defaults to git config user.name
+  author_email: ""                                   # defaults to git config user.email
+
+  # Limit which commit types trigger a release (default: all three).
+  releasable_types:
+    - fix
+    - feat
+    - breaking
+
+  # Control which version component each commit type bumps.
+  # Valid values: "patch" (default) or "minor".
+  bump_rules:
+    breaking: "patch"
+    feat: "patch"
+    fix: "patch"
+
+maven:
+  pom_path: "pom.xml"                                # single pom.xml, relative to repo root
+
+  # Multi-module: list overrides pom_path.
+  # pom_paths:
+  #   - "pom.xml"
+  #   - "module-a/pom.xml"
+  #   - "module-b/pom.xml"
+
+node:                                                # opt-in — omit section to skip
+  # package_json: "package.json"                     # single path
+
+  # Monorepo: list overrides package_json.
+  # package_jsons:
+  #   - "packages/frontend/package.json"
+  #   - "packages/backend/package.json"
+
+gradle:                                              # opt-in — omit section to skip
+  # build_file: "build.gradle"                       # Groovy or Kotlin DSL; single path
+
+  # Multi-module: list overrides build_file.
+  # build_files:
+  #   - "build.gradle"
+  #   - "module-a/build.gradle"
+
+python:                                              # opt-in — omit section to skip
+  # pyproject_toml: "pyproject.toml"                 # PEP 621 [project].version or [tool.poetry].version
+
+  # Monorepo: list overrides pyproject_toml.
+  # pyproject_tomls:
+  #   - "pyproject.toml"
+  #   - "packages/cli/pyproject.toml"
+
+gitlab:
+  url: "https://gitlab.example.com"                  # or env CI_SERVER_URL
+  token: ""                                          # prefer env GITLAB_TOKEN
+  project: ""                                        # prefer env CI_PROJECT_ID or CI_PROJECT_PATH
+
+github:
+  token: ""                                          # prefer env GITHUB_TOKEN
+  repo: ""                                           # "owner/repo" format
+
+notify:                                              # opt-in — every field independent; failures are warnings, not errors
+  # slack_webhook_url: ""                             # or env SLACK_WEBHOOK_URL
+  # teams_webhook_url: ""                             # or env TEAMS_WEBHOOK_URL
+  # google_chat_webhook_url: ""                       # or env GOOGLE_CHAT_WEBHOOK_URL
+  # telegram_bot_token: ""                            # or env TELEGRAM_BOT_TOKEN (both required)
+  # telegram_chat_id: ""                              # or env TELEGRAM_CHAT_ID
+  # webhook_url: ""                                   # generic {"version","notes"} JSON POST; or env RELEASER_WEBHOOK_URL
+```
+
+{{< hint info >}}
+When both `github.*` and `gitlab.*` are configured, GitHub takes precedence.
+{{< /hint >}}
+
+## Environment variables
+
+| Variable | Used for |
+|----------|----------|
+| `GITLAB_TOKEN` | GitLab API auth + HTTPS push auth |
+| `CI_SERVER_URL` | GitLab instance URL |
+| `CI_PROJECT_ID` | GitLab project identifier (numeric) |
+| `CI_PROJECT_PATH` | GitLab project identifier (fallback) |
+| `GITHUB_TOKEN` | GitHub API auth |
+| `SLACK_WEBHOOK_URL` | Slack release notification |
+| `TEAMS_WEBHOOK_URL` | Microsoft Teams release notification |
+| `GOOGLE_CHAT_WEBHOOK_URL` | Google Chat release notification |
+| `TELEGRAM_BOT_TOKEN` / `TELEGRAM_CHAT_ID` | Telegram release notification (both required) |
+| `RELEASER_WEBHOOK_URL` | Generic webhook release notification |
+
+## Config sources
+
+Run `releaser --verbose --dry-run` to see every config key, its resolved value, and where it came from (`default` / `config file` / `env: VARNAME` / `flag: --name`).
+
+## `git.releasable_types`
+
+By default `fix`, `feat`, and `breaking` commits all trigger a release. Use `releasable_types` to restrict this — for example, on a maintenance branch where you want only bug fixes to release:
+
+```yaml
+git:
+  releasable_types:
+    - fix
+```
+
+## `git.bump_rules`
+
+By default every releasable commit bumps the **patch** component. The `bump_rules` map lets you promote specific types to bump **minor** instead. This is useful on a branch that manages its own minor versioning:
+
+```yaml
+git:
+  bump_rules:
+    feat: "minor"      # feat: commits bump minor, not patch
+    breaking: "minor"  # breaking changes bump minor too
+    fix: "patch"       # fix: stays patch (this is the default)
+```
+
+## Multi-module Maven
+
+`pom_paths` accepts a list and overrides `pom_path`. All listed files are updated and committed in the same release commit:
+
+```yaml
+maven:
+  pom_paths:
+    - "pom.xml"
+    - "module-a/pom.xml"
+    - "module-b/pom.xml"
+```
+
+The `--pom` CLI flag sets a single path and clears `pom_paths`.
+
+## Node.js support
+
+The `node` section is opt-in — if omitted, no `package.json` is touched. Use `package_jsons` for monorepos:
+
+```yaml
+node:
+  package_jsons:
+    - "packages/frontend/package.json"
+    - "packages/backend/package.json"
+```
+
+## Python support
+
+The `python` section is opt-in — if omitted, no `pyproject.toml` is touched. `releaser` reads `[project].version` (PEP 621) first; if not found it falls back to `[tool.poetry].version`. The original file formatting is preserved on write.
+
+```yaml
+python:
+  pyproject_toml: "pyproject.toml"
+```
+
+Use `pyproject_tomls` for monorepos:
+
+```yaml
+python:
+  pyproject_tomls:
+    - "pyproject.toml"
+    - "packages/cli/pyproject.toml"
+    - "packages/lib/pyproject.toml"
+```
+
+The `--pyproject <path>` CLI flag sets a single path and clears `pyproject_tomls`.
+
+## Gradle support
+
+The `gradle` section is opt-in — if omitted, no build file is touched. Both Groovy DSL (`version = '1.2.3'`) and Kotlin DSL (`version = "1.2.3"`) are supported; the original quote style is preserved on write.
+
+```yaml
+gradle:
+  build_file: "build.gradle"
+```
+
+Use `build_files` for multi-module projects:
+
+```yaml
+gradle:
+  build_files:
+    - "build.gradle"
+    - "module-a/build.gradle"
+    - "module-b/build.gradle"
+```
+
+The `--gradle <path>` CLI flag sets a single build file path and clears `build_files`.
+
+## Notifications
+
+The `notify` section is opt-in — every target is independent, and any combination may be configured at once. A notification failure is logged as a warning and never fails the release; notifications fire once the tag has been pushed, whether or not a GitLab/GitHub release is also created (`--no-release` still notifies; `--no-push` and `--no-commit` do not, since nothing was published).
+
+```yaml
+notify:
+  slack_webhook_url: "https://hooks.slack.com/services/..."
+  teams_webhook_url: "https://outlook.office.com/webhook/..."
+  google_chat_webhook_url: "https://chat.googleapis.com/v1/spaces/.../messages?key=..."
+  telegram_bot_token: "123456:ABC-..."
+  telegram_chat_id: "-1001234567890"
+  webhook_url: "https://example.com/hooks/releaser"
+```
+
+- **Slack** / **Google Chat** — a single `{"text": "..."}` incoming-webhook payload.
+- **Microsoft Teams** — a legacy O365 connector `MessageCard` payload (the format Teams incoming webhook URLs accept).
+- **Telegram** — `telegram_bot_token` and `telegram_chat_id` are both required; posts to the Bot API `sendMessage` endpoint as plain text (no `parse_mode`, since release notes come from free-form commit messages and aren't guaranteed to be valid Telegram Markdown).
+- **Generic webhook** — POSTs `{"version": "<tag>", "notes": "<release notes>"}` for any downstream consumer (n8n, Zapier, a custom receiver).
+
+Each field also has an environment variable fallback — see [Environment variables](#environment-variables) above.

docs/content/installation.md

@@ -0,0 +1,59 @@
+---
+title: Installation
+weight: 10
+---
+
+## Pre-built binaries
+
+Download the latest release for your platform from the [Releases page](https://git.k3nny.fr/k3nny/releaser/releases).
+
+```bash
+# Linux (amd64)
+curl -sSL https://git.k3nny.fr/k3nny/releaser/releases/download/v1.5.0/releaser-v1.5.0-linux-amd64 \
+  -o /usr/local/bin/releaser
+chmod +x /usr/local/bin/releaser
+```
+
+Available platforms: `linux-amd64`, `linux-arm64`, `darwin-amd64`, `darwin-arm64`, `windows-amd64.exe`.
+
+## Docker
+
+```bash
+docker pull git.k3nny.fr/k3nny/releaser/releaser:latest
+
+# Run in the current repository
+docker run --rm \
+  -v "$PWD:/repo" \
+  -e GITLAB_TOKEN="$GITLAB_TOKEN" \
+  git.k3nny.fr/k3nny/releaser/releaser:latest
+```
+
+## Build from source
+
+Requires Go 1.21+.
+
+```bash
+git clone https://git.k3nny.fr/k3nny/releaser/releaser.git
+cd releaser
+go build -o /usr/local/bin/releaser ./cmd
+```
+
+## Verify
+
+```bash
+releaser --version
+```
+
+## First run
+
+Scaffold a default `.releaser.yml` in your repository root:
+
+```bash
+releaser --init
+```
+
+Then do a dry run to check the version that would be produced:
+
+```bash
+releaser --dry-run
+```

docs/content/usage.md

@@ -0,0 +1,71 @@
+---
+title: CLI Reference
+weight: 20
+---
+
+## Common workflows
+
+```bash
+# Scaffold a default .releaser.yml
+releaser --init
+
+# Preview next version (no side effects)
+releaser --dry-run
+
+# Full release: bump versions, commit, tag, push, create release
+releaser
+
+# Commit and tag locally — skip push and release creation
+releaser --no-push
+
+# Push commit and tag but skip creating the release
+releaser --no-release
+
+# Update files but stop before committing
+releaser --no-commit
+# ... review changes, then commit manually and re-run:
+releaser --tag-only
+
+# Verbose mode: show config sources, commit analysis, version decision
+releaser --verbose --dry-run
+```
+
+## Flags
+
+| Flag | Default | Description |
+|------|---------|-------------|
+| `--dry-run` | false | Print next version and exit without making any changes |
+| `--branch <name>` | auto-detected | Override branch name (useful in detached HEAD / CI) |
+| `--branch-pattern <regex>` | `^(?:.*/)?release/(\d+)\.(\d+)$` | Override branch pattern (two capture groups: major, minor) |
+| `--tag-prefix <prefix>` | `""` | Prefix for version tags (e.g. `v` → `v1.2.3`) |
+| `--pom <path>` | `pom.xml` | Path to pom.xml relative to repo root |
+| `--gradle <path>` | — | Override `gradle.build_file` from config |
+| `--pyproject <path>` | — | Override `python.pyproject_toml` from config |
+| `--changelog-file <path>` | `CHANGELOG.md` | Path to changelog file |
+| `--release-env-file <path>` | `release.env` | Path for dotenv artifact; pass `""` to disable |
+| `--no-commit` | false | Update version files but stop before committing |
+| `--no-push` | false | Commit and tag locally, skip push and release |
+| `--no-release` | false | Push branch and tag but skip release creation |
+| `--tag-only` | false | Skip version file updates — tag HEAD and push |
+| `--init` | false | Scaffold a default `.releaser.yml` and exit |
+| `--verbose` | false | Print config table, commit analysis, and version decision |
+
+## Exit codes
+
+| Code | Meaning |
+|------|---------|
+| `0` | Success |
+| `1` | Error (config, git, API, etc.) |
+| `2` | No releasable commits found — nothing to do |
+
+## Version bump rules
+
+By default all releasable commits bump the **patch** component (minor is pinned to the branch). Override per commit type via `git.bump_rules` in `.releaser.yml`:
+
+| Commit type | Default | Configurable via `bump_rules` |
+|-------------|---------|-------------------------------|
+| `fix:` | patch | `fix: "minor"` to bump minor |
+| `feat:` | patch | `feat: "minor"` to bump minor |
+| `feat!:` / `BREAKING CHANGE` | patch | `breaking: "minor"` to bump minor |
+| `chore:`, `docs:`, etc. | none | — |
+| unparseable message | none | non-strict: silently ignored |

docs/data/menu/main.yaml

@@ -0,0 +1,16 @@
+main:
+  - name: Installation
+    ref: /installation
+    weight: 10
+  - name: CLI Reference
+    ref: /usage
+    weight: 20
+  - name: Configuration
+    ref: /configuration
+    weight: 30
+  - name: CI Integration
+    ref: /ci-integration
+    weight: 40
+  - name: Changelog
+    ref: /changelog
+    weight: 50

docs/hugo.toml

@@ -0,0 +1,26 @@
+baseURL = "https://releaser.k3nny.fr/"
+title = "releaser"
+theme = "geekdoc"
+
+pygmentsUseClasses = true
+pygmentsCodeFences = true
+
+[markup]
+  [markup.goldmark.renderer]
+    unsafe = true
+  [markup.tableOfContents]
+    startLevel = 1
+    endLevel = 9
+
+[params]
+  geekdocLogo = "images/releaser-logo-1024.png"
+  geekdocRepo = "https://git.k3nny.fr/k3nny/releaser"
+  geekdocEditPath = "_edit/main/docs"
+  geekdocSearch = true
+  geekdocMenuBundle = true
+  geekdocBreadcrumb = false
+  geekdocToC = true
+
+  [params.geekdocContentLicense]
+    name = "Apache License 2.0"
+    link = "https://git.k3nny.fr/k3nny/releaser/src/branch/main/LICENSE"

internal/changelog/changelog.go

@@ -0,0 +1,76 @@
+package changelog
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"git.k3nny.fr/releaser/internal/commits"
+)
+
+// Update inserts a new release section into the CHANGELOG file at path.
+// If the file does not exist it is created with a standard header.
+// Only commits with a releasable type (fix, feat, breaking) produce bullets;
+// if none are found the file is left untouched.
+// If a section for version already exists the file is left untouched (idempotent).
+func Update(path, tag, version string, messages []string) error {
+	section := buildSection(version, messages)
+	if section == "" {
+		return nil
+	}
+
+	existing := ""
+	data, err := os.ReadFile(path)
+	if err == nil {
+		existing = string(data)
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return fmt.Errorf("read %s: %w", path, err)
+	}
+
+	if strings.Contains(existing, "## ["+version+"]") {
+		return nil
+	}
+
+	var out string
+	if existing == "" {
+		out = "# Changelog\n\nAll notable changes to this project will be documented in this file.\n\n" +
+			section + "\n"
+	} else {
+		// Insert above the first ## [ heading so newest release is always at top.
+		if idx := strings.Index(existing, "\n## ["); idx >= 0 {
+			out = existing[:idx+1] + section + "\n\n" + existing[idx+1:]
+		} else {
+			out = strings.TrimRight(existing, "\n") + "\n\n" + section + "\n"
+		}
+	}
+
+	return os.WriteFile(path, []byte(out), 0644)
+}
+
+func buildSection(version string, messages []string) string {
+	breaking, feats, fixes := commits.Group(messages)
+	if len(breaking)+len(feats)+len(fixes) == 0 {
+		return ""
+	}
+
+	date := time.Now().Format("2006-01-02")
+	var sb strings.Builder
+	fmt.Fprintf(&sb, "## [%s] - %s\n", version, date)
+	writeSection(&sb, "Breaking Changes", breaking)
+	writeSection(&sb, "Added", feats)
+	writeSection(&sb, "Fixed", fixes)
+
+	return strings.TrimRight(sb.String(), "\n")
+}
+
+func writeSection(sb *strings.Builder, title string, items []string) {
+	if len(items) == 0 {
+		return
+	}
+	fmt.Fprintf(sb, "\n### %s\n", title)
+	for _, item := range items {
+		fmt.Fprintf(sb, "- %s\n", item)
+	}
+}

internal/changelog/changelog_test.go

@@ -0,0 +1,170 @@
+package changelog
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestUpdateNewFile(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "CHANGELOG.md")
+
+	if err := Update(path, "v1.2.0", "1.2.0", []string{
+		"feat: add widget",
+		"fix: off-by-one in parser",
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	data, _ := os.ReadFile(path)
+	s := string(data)
+	if !strings.Contains(s, "## [1.2.0]") {
+		t.Error("expected version header")
+	}
+	if !strings.Contains(s, "### Added") {
+		t.Error("expected Added section")
+	}
+	if !strings.Contains(s, "### Fixed") {
+		t.Error("expected Fixed section")
+	}
+	if !strings.Contains(s, "add widget") {
+		t.Error("expected feat subject")
+	}
+	if !strings.Contains(s, "off-by-one in parser") {
+		t.Error("expected fix subject")
+	}
+}
+
+func TestUpdateExistingFile(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "CHANGELOG.md")
+
+	// Seed with an older release.
+	os.WriteFile(path, []byte("# Changelog\n\n## [1.1.0] - 2026-01-01\n\n### Added\n- old stuff\n"), 0644)
+
+	if err := Update(path, "v1.2.0", "1.2.0", []string{"feat: new thing"}); err != nil {
+		t.Fatal(err)
+	}
+
+	data, _ := os.ReadFile(path)
+	s := string(data)
+
+	newIdx := strings.Index(s, "## [1.2.0]")
+	oldIdx := strings.Index(s, "## [1.1.0]")
+	if newIdx < 0 || oldIdx < 0 {
+		t.Fatal("both versions should appear in CHANGELOG")
+	}
+	if newIdx > oldIdx {
+		t.Error("new version should appear before old version")
+	}
+}
+
+func TestUpdateNoReleasableCommits(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "CHANGELOG.md")
+
+	if err := Update(path, "v1.0.1", "1.0.1", []string{
+		"chore: update deps",
+		"docs: fix typo",
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	// File should NOT have been created.
+	if _, err := os.Stat(path); err == nil {
+		t.Error("file should not be created when there are no releasable commits")
+	}
+}
+
+func TestUpdateBreakingSection(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "CHANGELOG.md")
+
+	if err := Update(path, "v2.0.0", "2.0.0", []string{
+		"feat!: redesign API",
+		"fix(core): nil panic",
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	data, _ := os.ReadFile(path)
+	s := string(data)
+	if !strings.Contains(s, "### Breaking Changes") {
+		t.Error("expected Breaking Changes section")
+	}
+	if !strings.Contains(s, "redesign API") {
+		t.Error("expected breaking subject")
+	}
+}
+
+func TestUpdateExistingFileNoHeading(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "CHANGELOG.md")
+
+	// File with content but no ## [ heading — new section appended at bottom.
+	os.WriteFile(path, []byte("# Changelog\n\nSome preamble.\n"), 0644)
+
+	err := Update(path, "v1.0.0", "1.0.0", []string{"fix: something"})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data, _ := os.ReadFile(path)
+	s := string(data)
+	if !strings.Contains(s, "## [1.0.0]") {
+		t.Error("expected version header appended")
+	}
+	if !strings.Contains(s, "# Changelog") {
+		t.Error("expected original content preserved")
+	}
+}
+
+func TestUpdateReadError(t *testing.T) {
+	dir := t.TempDir()
+	// Create a directory where the file should be — ReadFile will error.
+	os.Mkdir(filepath.Join(dir, "CHANGELOG.md"), 0755)
+
+	err := Update(filepath.Join(dir, "CHANGELOG.md"), "v1.0.0", "1.0.0", []string{"fix: something"})
+	if err == nil {
+		t.Error("expected error when path is a directory")
+	}
+}
+
+func TestUpdateIdempotent(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "CHANGELOG.md")
+
+	// Pre-seed with the version heading already present.
+	os.WriteFile(path, []byte("# Changelog\n\n## [1.0.0] - 2026-01-01\n\n- fix: something\n"), 0644)
+
+	// Second call must be a no-op (returns nil, file unchanged).
+	if err := Update(path, "v1.0.0", "1.0.0", []string{"fix: something"}); err != nil {
+		t.Fatalf("idempotent Update should not error, got: %v", err)
+	}
+
+	data, _ := os.ReadFile(path)
+	if strings.Count(string(data), "## [1.0.0]") != 1 {
+		t.Error("version heading should appear exactly once after idempotent call")
+	}
+}
+
+// FuzzUpdate verifies Update never panics on arbitrary existing file content or commit messages.
+func FuzzUpdate(f *testing.F) {
+	f.Add("", "feat: add thing")
+	f.Add("# Changelog\n\n## [1.0.0] - 2026-01-01\n\n### Added\n- something\n", "fix: something")
+	f.Add("some preamble\n", "feat!: breaking change")
+	f.Add("\n## [2.0.0] - 2026-01-01\n", "feat: another thing")
+	f.Add("", "chore: no release")
+	f.Add("", "")
+
+	f.Fuzz(func(t *testing.T, existing, message string) {
+		dir := t.TempDir()
+		path := filepath.Join(dir, "CHANGELOG.md")
+		if existing != "" {
+			os.WriteFile(path, []byte(existing), 0644) //nolint:errcheck
+		}
+		Update(path, "v1.0.0", "1.0.0", []string{message}) //nolint:errcheck
+	})
+}

internal/commits/commits.go

@@ -5,6 +5,62 @@ import (
 	"strings"
 )
 
+// headerSubjectRe captures the subject (description) from a conventional commit header.
+var headerSubjectRe = regexp.MustCompile(`(?i)^\w+(?:\([^)]*\))?!?\s*:\s*(.+)`)
+
+// ExtractSubject returns the description part of a conventional commit header.
+// Falls back to the trimmed raw header if the pattern does not match.
+func ExtractSubject(header string) string {
+	m := headerSubjectRe.FindStringSubmatch(header)
+	if m != nil {
+		return strings.TrimSpace(m[1])
+	}
+	return strings.TrimSpace(header)
+}
+
+// Group splits messages into breaking changes, features, and fixes.
+// Only the first line of each message is considered; the subject is extracted.
+// Messages with TypeNone are silently dropped.
+func Group(messages []string) (breaking, feats, fixes []string) {
+	for _, msg := range messages {
+		t := Parse(msg)
+		if t == TypeNone {
+			continue
+		}
+		first := strings.SplitN(strings.TrimSpace(msg), "\n", 2)[0]
+		subject := ExtractSubject(first)
+		switch t {
+		case TypeBreaking:
+			breaking = append(breaking, subject)
+		case TypeFeat:
+			feats = append(feats, subject)
+		case TypeFix:
+			fixes = append(fixes, subject)
+		}
+	}
+	return
+}
+
+// ReleasableSet converts a slice of type-name strings to a set for use in version.Next.
+// An empty or nil slice defaults to all three releasable types (fix, feat, breaking).
+func ReleasableSet(typeNames []string) map[Type]bool {
+	if len(typeNames) == 0 {
+		return map[Type]bool{TypeFix: true, TypeFeat: true, TypeBreaking: true}
+	}
+	m := make(map[Type]bool, len(typeNames))
+	for _, name := range typeNames {
+		switch strings.ToLower(name) {
+		case "fix":
+			m[TypeFix] = true
+		case "feat":
+			m[TypeFeat] = true
+		case "breaking":
+			m[TypeBreaking] = true
+		}
+	}
+	return m
+}
+
 // Type represents the semantic weight of a commit for versioning purposes.
 type Type int
 

internal/commits/commits_test.go

@@ -35,6 +35,64 @@ func FuzzParse(f *testing.F) {
 	})
 }
 
+func TestExtractSubject(t *testing.T) {
+	cases := []struct {
+		header string
+		want   string
+	}{
+		{"feat: add login", "add login"},
+		{"feat(auth): add OAuth2", "add OAuth2"},
+		{"feat!: remove API", "remove API"},
+		{"FIX:typo", "typo"},
+		{"plain message", "plain message"},
+	}
+	for _, c := range cases {
+		got := ExtractSubject(c.header)
+		if got != c.want {
+			t.Errorf("ExtractSubject(%q) = %q, want %q", c.header, got, c.want)
+		}
+	}
+}
+
+func TestGroup(t *testing.T) {
+	messages := []string{
+		"feat: add login",
+		"fix: patch null pointer",
+		"feat!: remove legacy API",
+		"chore: update deps",
+		"fix: handle empty response",
+	}
+	breaking, feats, fixes := Group(messages)
+	if len(breaking) != 1 || breaking[0] != "remove legacy API" {
+		t.Errorf("breaking = %v, want [remove legacy API]", breaking)
+	}
+	if len(feats) != 1 || feats[0] != "add login" {
+		t.Errorf("feats = %v, want [add login]", feats)
+	}
+	if len(fixes) != 2 {
+		t.Errorf("fixes = %v, want 2 items", fixes)
+	}
+}
+
+func TestReleasableSet(t *testing.T) {
+	all := ReleasableSet(nil)
+	if !all[TypeFix] || !all[TypeFeat] || !all[TypeBreaking] {
+		t.Error("nil input should return all three types")
+	}
+	only := ReleasableSet([]string{"fix"})
+	if !only[TypeFix] || only[TypeFeat] || only[TypeBreaking] {
+		t.Errorf("fix-only set: %v", only)
+	}
+	onlyFeat := ReleasableSet([]string{"feat"})
+	if onlyFeat[TypeFix] || !onlyFeat[TypeFeat] || onlyFeat[TypeBreaking] {
+		t.Errorf("feat-only set: %v", onlyFeat)
+	}
+	onlyBreaking := ReleasableSet([]string{"breaking"})
+	if onlyBreaking[TypeFix] || onlyBreaking[TypeFeat] || !onlyBreaking[TypeBreaking] {
+		t.Errorf("breaking-only set: %v", onlyBreaking)
+	}
+}
+
 func TestTypeString(t *testing.T) {
 	cases := []struct {
 		t    Type

internal/config/config.go

@@ -16,7 +16,12 @@ const filename = ".releaser.yml"
 type Config struct {
 	Git    GitConfig    `yaml:"git"`
 	Maven  MavenConfig  `yaml:"maven"`
+	Node   NodeConfig   `yaml:"node"`
+	Gradle  GradleConfig  `yaml:"gradle"`
+	Python  PythonConfig  `yaml:"python"`
 	GitLab  GitLabConfig  `yaml:"gitlab"`
+	GitHub GitHubConfig `yaml:"github"`
+	Notify NotifyConfig `yaml:"notify"`
 }
 
 type GitConfig struct {
@@ -25,10 +30,84 @@ type GitConfig struct {
 	CommitMessage   string         `yaml:"commit_message"`
 	AuthorName      string         `yaml:"author_name"`
 	AuthorEmail     string         `yaml:"author_email"`
+	ReleasableTypes []string       `yaml:"releasable_types"`
+	BumpRules       BumpRulesConfig `yaml:"bump_rules"`
+}
+
+// BumpRulesConfig controls what version component each commit type bumps.
+// Valid values: "patch" (default) or "minor".
+type BumpRulesConfig struct {
+	Breaking string `yaml:"breaking"`
+	Feat     string `yaml:"feat"`
+	Fix      string `yaml:"fix"`
 }
 
 type MavenConfig struct {
-	PomPath string `yaml:"pom_path"`
+	PomPath  string   `yaml:"pom_path"`  // single path (default: "pom.xml")
+	PomPaths []string `yaml:"pom_paths"` // multiple paths; overrides PomPath when set
+}
+
+// EffectivePomPaths returns the list of pom.xml paths to process.
+// PomPaths takes precedence over PomPath; falls back to ["pom.xml"].
+func (m MavenConfig) EffectivePomPaths() []string {
+	if len(m.PomPaths) > 0 {
+		return m.PomPaths
+	}
+	if m.PomPath != "" {
+		return []string{m.PomPath}
+	}
+	return []string{"pom.xml"}
+}
+
+type NodeConfig struct {
+	PackageJSON  string   `yaml:"package_json"`  // single path
+	PackageJSONs []string `yaml:"package_jsons"` // multiple paths; overrides PackageJSON when set
+}
+
+// EffectivePaths returns the list of package.json paths to process.
+// Returns nil when no node paths are configured (node processing is opt-in).
+func (n NodeConfig) EffectivePaths() []string {
+	if len(n.PackageJSONs) > 0 {
+		return n.PackageJSONs
+	}
+	if n.PackageJSON != "" {
+		return []string{n.PackageJSON}
+	}
+	return nil
+}
+
+type GradleConfig struct {
+	BuildFile  string   `yaml:"build_file"`  // single path (opt-in, no default)
+	BuildFiles []string `yaml:"build_files"` // multiple paths; overrides BuildFile
+}
+
+// EffectiveBuildFiles returns the list of Gradle build file paths to process.
+// Returns nil when no gradle paths are configured (gradle processing is opt-in).
+func (g GradleConfig) EffectiveBuildFiles() []string {
+	if len(g.BuildFiles) > 0 {
+		return g.BuildFiles
+	}
+	if g.BuildFile != "" {
+		return []string{g.BuildFile}
+	}
+	return nil
+}
+
+type PythonConfig struct {
+	PyprojectTOML  string   `yaml:"pyproject_toml"`  // single path (opt-in, no default)
+	PyprojectTOMLs []string `yaml:"pyproject_tomls"` // multiple paths; overrides PyprojectTOML
+}
+
+// EffectivePaths returns the list of pyproject.toml paths to process.
+// Returns nil when no python paths are configured (python processing is opt-in).
+func (p PythonConfig) EffectivePaths() []string {
+	if len(p.PyprojectTOMLs) > 0 {
+		return p.PyprojectTOMLs
+	}
+	if p.PyprojectTOML != "" {
+		return []string{p.PyprojectTOML}
+	}
+	return nil
 }
 
 type GitLabConfig struct {
@@ -37,10 +116,26 @@ type GitLabConfig struct {
 	Project string `yaml:"project"`
 }
 
+type GitHubConfig struct {
+	Token string `yaml:"token"`
+	Repo  string `yaml:"repo"` // "owner/repo"
+}
+
+// NotifyConfig configures best-effort release notifications. Every field is
+// opt-in — a target is only used when its required fields are non-empty.
+type NotifyConfig struct {
+	SlackWebhookURL      string `yaml:"slack_webhook_url"`
+	TeamsWebhookURL      string `yaml:"teams_webhook_url"`
+	GoogleChatWebhookURL string `yaml:"google_chat_webhook_url"`
+	TelegramBotToken     string `yaml:"telegram_bot_token"`
+	TelegramChatID       string `yaml:"telegram_chat_id"`
+	WebhookURL           string `yaml:"webhook_url"`
+}
+
 func defaults() Config {
 	return Config{
 		Git: GitConfig{
-			TagPrefix:     "v",
+			TagPrefix:     "",
 			BranchPattern: branch.DefaultBranchPattern,
 			CommitMessage: "chore(release): {version} [skip ci]",
 		},
@@ -50,42 +145,253 @@ func defaults() Config {
 	}
 }
 
+// Sources records where each config value came from.
+// Keys are "section.field" (e.g. "git.tag_prefix").
+// Values are one of: "default", "config file", "env: VARNAME", "flag: --flag-name".
+type Sources map[string]string
+
+func defaultSources() Sources {
+	return Sources{
+		"git.tag_prefix":          "default",
+		"git.branch_pattern":      "default",
+		"git.commit_message":      "default",
+		"git.author_name":         "default",
+		"git.author_email":        "default",
+		"git.releasable_types":    "default",
+		"git.bump_rules.breaking": "default",
+		"git.bump_rules.feat":     "default",
+		"git.bump_rules.fix":      "default",
+		"maven.pom_path":          "default",
+		"maven.pom_paths":         "default",
+		"node.package_json":       "default",
+		"node.package_jsons":      "default",
+		"gradle.build_file":        "default",
+		"gradle.build_files":       "default",
+		"python.pyproject_toml":    "default",
+		"python.pyproject_tomls":   "default",
+		"gitlab.url":               "default",
+		"gitlab.token":            "default",
+		"gitlab.project":          "default",
+		"github.token":            "default",
+		"github.repo":             "default",
+		"notify.slack_webhook_url":       "default",
+		"notify.teams_webhook_url":       "default",
+		"notify.google_chat_webhook_url": "default",
+		"notify.telegram_bot_token":      "default",
+		"notify.telegram_chat_id":        "default",
+		"notify.webhook_url":             "default",
+	}
+}
+
 // Load reads .releaser.yml from dir and merges it over the defaults.
 // Missing file is not an error — defaults are returned as-is.
 func Load(dir string) (Config, error) {
+	cfg, _, err := LoadWithSources(dir)
+	return cfg, err
+}
+
+// LoadWithSources is like Load but also returns a Sources map recording where each
+// value came from ("default" or "config file").
+func LoadWithSources(dir string) (Config, Sources, error) {
 	cfg := defaults()
+	src := defaultSources()
 
 	data, err := os.ReadFile(filepath.Join(dir, filename))
 	if errors.Is(err, os.ErrNotExist) {
-		return cfg, nil
+		return cfg, src, nil
 	}
 	if err != nil {
-		return cfg, fmt.Errorf("read %s: %w", filename, err)
+		return cfg, src, fmt.Errorf("read %s: %w", filename, err)
 	}
 
+	// Unmarshal into cfg (merges over defaults).
 	if err := yaml.Unmarshal(data, &cfg); err != nil {
-		return cfg, fmt.Errorf("parse %s: %w", filename, err)
+		return cfg, src, fmt.Errorf("parse %s: %w", filename, err)
 	}
 
-	return cfg, nil
+	// Detect which fields the file explicitly set by unmarshaling into a zero overlay.
+	var overlay Config
+	_ = yaml.Unmarshal(data, &overlay)
+	if overlay.Git.TagPrefix != "" {
+		src["git.tag_prefix"] = "config file"
+	}
+	if overlay.Git.BranchPattern != "" {
+		src["git.branch_pattern"] = "config file"
+	}
+	if overlay.Git.CommitMessage != "" {
+		src["git.commit_message"] = "config file"
+	}
+	if overlay.Git.AuthorName != "" {
+		src["git.author_name"] = "config file"
+	}
+	if overlay.Git.AuthorEmail != "" {
+		src["git.author_email"] = "config file"
+	}
+	if len(overlay.Git.ReleasableTypes) > 0 {
+		src["git.releasable_types"] = "config file"
+	}
+	if overlay.Git.BumpRules.Breaking != "" {
+		src["git.bump_rules.breaking"] = "config file"
+	}
+	if overlay.Git.BumpRules.Feat != "" {
+		src["git.bump_rules.feat"] = "config file"
+	}
+	if overlay.Git.BumpRules.Fix != "" {
+		src["git.bump_rules.fix"] = "config file"
+	}
+	if overlay.Maven.PomPath != "" {
+		src["maven.pom_path"] = "config file"
+	}
+	if len(overlay.Maven.PomPaths) > 0 {
+		src["maven.pom_paths"] = "config file"
+	}
+	if overlay.Node.PackageJSON != "" {
+		src["node.package_json"] = "config file"
+	}
+	if len(overlay.Node.PackageJSONs) > 0 {
+		src["node.package_jsons"] = "config file"
+	}
+	if overlay.Gradle.BuildFile != "" {
+		src["gradle.build_file"] = "config file"
+	}
+	if len(overlay.Gradle.BuildFiles) > 0 {
+		src["gradle.build_files"] = "config file"
+	}
+	if overlay.Python.PyprojectTOML != "" {
+		src["python.pyproject_toml"] = "config file"
+	}
+	if len(overlay.Python.PyprojectTOMLs) > 0 {
+		src["python.pyproject_tomls"] = "config file"
+	}
+	if overlay.GitLab.URL != "" {
+		src["gitlab.url"] = "config file"
+	}
+	if overlay.GitLab.Token != "" {
+		src["gitlab.token"] = "config file"
+	}
+	if overlay.GitLab.Project != "" {
+		src["gitlab.project"] = "config file"
+	}
+	if overlay.GitHub.Token != "" {
+		src["github.token"] = "config file"
+	}
+	if overlay.GitHub.Repo != "" {
+		src["github.repo"] = "config file"
+	}
+	if overlay.Notify.SlackWebhookURL != "" {
+		src["notify.slack_webhook_url"] = "config file"
+	}
+	if overlay.Notify.TeamsWebhookURL != "" {
+		src["notify.teams_webhook_url"] = "config file"
+	}
+	if overlay.Notify.GoogleChatWebhookURL != "" {
+		src["notify.google_chat_webhook_url"] = "config file"
+	}
+	if overlay.Notify.TelegramBotToken != "" {
+		src["notify.telegram_bot_token"] = "config file"
+	}
+	if overlay.Notify.TelegramChatID != "" {
+		src["notify.telegram_chat_id"] = "config file"
+	}
+	if overlay.Notify.WebhookURL != "" {
+		src["notify.webhook_url"] = "config file"
 	}
 
-// ApplyEnv fills empty GitLab fields from the standard GitLab CI environment variables.
+	return cfg, src, nil
+}
+
+// ApplyEnv fills empty GitLab and GitHub fields from environment variables.
 // Values already set in the config file are never overwritten.
 func (c *Config) ApplyEnv() {
+	c.ApplyEnvWithSources(nil)
+}
+
+// ApplyEnvWithSources is like ApplyEnv but records the env var name in src for each
+// field it fills. src may be nil.
+func (c *Config) ApplyEnvWithSources(src Sources) {
 	if c.GitLab.Token == "" {
-		c.GitLab.Token = os.Getenv("GITLAB_TOKEN")
+		if v := os.Getenv("GITLAB_TOKEN"); v != "" {
+			c.GitLab.Token = v
+			if src != nil {
+				src["gitlab.token"] = "env: GITLAB_TOKEN"
+			}
+		}
 	}
 	if c.GitLab.URL == "" {
-		// CI_SERVER_URL is the cleanest source ("https://gitlab.example.com")
+		if v := os.Getenv("CI_SERVER_URL"); v != "" {
-		c.GitLab.URL = os.Getenv("CI_SERVER_URL")
+			c.GitLab.URL = v
+			if src != nil {
+				src["gitlab.url"] = "env: CI_SERVER_URL"
+			}
+		}
 	}
 	if c.GitLab.Project == "" {
-		// Prefer numeric ID; fall back to namespace/project path
 		if id := os.Getenv("CI_PROJECT_ID"); id != "" {
 			c.GitLab.Project = id
-		} else {
+			if src != nil {
-			c.GitLab.Project = os.Getenv("CI_PROJECT_PATH")
+				src["gitlab.project"] = "env: CI_PROJECT_ID"
+			}
+		} else if p := os.Getenv("CI_PROJECT_PATH"); p != "" {
+			c.GitLab.Project = p
+			if src != nil {
+				src["gitlab.project"] = "env: CI_PROJECT_PATH"
+			}
+		}
+	}
+	if c.GitHub.Token == "" {
+		if v := os.Getenv("GITHUB_TOKEN"); v != "" {
+			c.GitHub.Token = v
+			if src != nil {
+				src["github.token"] = "env: GITHUB_TOKEN"
+			}
+		}
+	}
+	if c.Notify.SlackWebhookURL == "" {
+		if v := os.Getenv("SLACK_WEBHOOK_URL"); v != "" {
+			c.Notify.SlackWebhookURL = v
+			if src != nil {
+				src["notify.slack_webhook_url"] = "env: SLACK_WEBHOOK_URL"
+			}
+		}
+	}
+	if c.Notify.TeamsWebhookURL == "" {
+		if v := os.Getenv("TEAMS_WEBHOOK_URL"); v != "" {
+			c.Notify.TeamsWebhookURL = v
+			if src != nil {
+				src["notify.teams_webhook_url"] = "env: TEAMS_WEBHOOK_URL"
+			}
+		}
+	}
+	if c.Notify.GoogleChatWebhookURL == "" {
+		if v := os.Getenv("GOOGLE_CHAT_WEBHOOK_URL"); v != "" {
+			c.Notify.GoogleChatWebhookURL = v
+			if src != nil {
+				src["notify.google_chat_webhook_url"] = "env: GOOGLE_CHAT_WEBHOOK_URL"
+			}
+		}
+	}
+	if c.Notify.TelegramBotToken == "" {
+		if v := os.Getenv("TELEGRAM_BOT_TOKEN"); v != "" {
+			c.Notify.TelegramBotToken = v
+			if src != nil {
+				src["notify.telegram_bot_token"] = "env: TELEGRAM_BOT_TOKEN"
+			}
+		}
+	}
+	if c.Notify.TelegramChatID == "" {
+		if v := os.Getenv("TELEGRAM_CHAT_ID"); v != "" {
+			c.Notify.TelegramChatID = v
+			if src != nil {
+				src["notify.telegram_chat_id"] = "env: TELEGRAM_CHAT_ID"
+			}
+		}
+	}
+	if c.Notify.WebhookURL == "" {
+		if v := os.Getenv("RELEASER_WEBHOOK_URL"); v != "" {
+			c.Notify.WebhookURL = v
+			if src != nil {
+				src["notify.webhook_url"] = "env: RELEASER_WEBHOOK_URL"
+			}
 		}
 	}
 }

internal/config/config_test.go

@@ -11,8 +11,8 @@ func TestLoadDefaults(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if cfg.Git.TagPrefix != "v" {
+	if cfg.Git.TagPrefix != "" {
-		t.Errorf("TagPrefix = %q, want %q", cfg.Git.TagPrefix, "v")
+		t.Errorf("TagPrefix = %q, want %q", cfg.Git.TagPrefix, "")
 	}
 	if cfg.Maven.PomPath != "pom.xml" {
 		t.Errorf("PomPath = %q, want %q", cfg.Maven.PomPath, "pom.xml")
@@ -123,6 +123,356 @@ func TestApplyEnvProjectPathFallback(t *testing.T) {
 	}
 }
 
+func TestLoadWithSourcesFullConfig(t *testing.T) {
+	dir := t.TempDir()
+	content := `
+git:
+  tag_prefix: "v"
+  branch_pattern: "^release/(\\d+)$"
+  commit_message: "release {version}"
+  author_name: "Bot"
+  author_email: "bot@example.com"
+  releasable_types: ["fix", "feat"]
+  bump_rules:
+    breaking: "minor"
+    feat: "patch"
+    fix: "patch"
+maven:
+  pom_path: "sub/pom.xml"
+  pom_paths:
+    - "a/pom.xml"
+    - "b/pom.xml"
+node:
+  package_json: "frontend/package.json"
+  package_jsons:
+    - "pkg-a/package.json"
+    - "pkg-b/package.json"
+gitlab:
+  url: "https://gitlab.example.com"
+  token: "gitlab-token"
+  project: "42"
+github:
+  token: "github-token"
+  repo: "owner/repo"
+`
+	if err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	_, src, err := LoadWithSources(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	wantConfigFile := []string{
+		"git.tag_prefix", "git.branch_pattern", "git.commit_message",
+		"git.author_name", "git.author_email", "git.releasable_types",
+		"git.bump_rules.breaking", "git.bump_rules.feat", "git.bump_rules.fix",
+		"maven.pom_path", "maven.pom_paths",
+		"node.package_json", "node.package_jsons",
+		"gitlab.url", "gitlab.token", "gitlab.project",
+		"github.token", "github.repo",
+	}
+	for _, key := range wantConfigFile {
+		if got := src[key]; got != "config file" {
+			t.Errorf("src[%q] = %q, want %q", key, got, "config file")
+		}
+	}
+}
+
+func TestEffectivePomPaths(t *testing.T) {
+	cases := []struct {
+		name string
+		cfg  MavenConfig
+		want []string
+	}{
+		{"default", MavenConfig{PomPath: "pom.xml"}, []string{"pom.xml"}},
+		{"single override", MavenConfig{PomPath: "sub/pom.xml"}, []string{"sub/pom.xml"}},
+		{"multi overrides single", MavenConfig{PomPath: "pom.xml", PomPaths: []string{"a/pom.xml", "b/pom.xml"}}, []string{"a/pom.xml", "b/pom.xml"}},
+		{"empty falls back to default", MavenConfig{}, []string{"pom.xml"}},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			got := c.cfg.EffectivePomPaths()
+			if len(got) != len(c.want) {
+				t.Fatalf("got %v, want %v", got, c.want)
+			}
+			for i := range got {
+				if got[i] != c.want[i] {
+					t.Errorf("[%d] got %q, want %q", i, got[i], c.want[i])
+				}
+			}
+		})
+	}
+}
+
+func TestNodeEffectivePaths(t *testing.T) {
+	cases := []struct {
+		name string
+		cfg  NodeConfig
+		want []string
+	}{
+		{"empty — opt-in, skip by default", NodeConfig{}, nil},
+		{"single", NodeConfig{PackageJSON: "package.json"}, []string{"package.json"}},
+		{"multi overrides single", NodeConfig{PackageJSON: "package.json", PackageJSONs: []string{"a/package.json", "b/package.json"}}, []string{"a/package.json", "b/package.json"}},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			got := c.cfg.EffectivePaths()
+			if len(got) != len(c.want) {
+				t.Fatalf("got %v, want %v", got, c.want)
+			}
+			for i := range got {
+				if got[i] != c.want[i] {
+					t.Errorf("[%d] got %q, want %q", i, got[i], c.want[i])
+				}
+			}
+		})
+	}
+}
+
+func TestApplyEnvWithSourcesCIProjectID(t *testing.T) {
+	t.Setenv("CI_PROJECT_ID", "123")
+	t.Setenv("CI_PROJECT_PATH", "")
+
+	cfg := defaults()
+	src := defaultSources()
+	cfg.ApplyEnvWithSources(src)
+
+	if src["gitlab.project"] != "env: CI_PROJECT_ID" {
+		t.Errorf("src[gitlab.project] = %q, want %q", src["gitlab.project"], "env: CI_PROJECT_ID")
+	}
+}
+
+func TestApplyEnvWithSourcesGitHubToken(t *testing.T) {
+	t.Setenv("GITHUB_TOKEN", "ghtoken")
+
+	cfg := defaults()
+	src := defaultSources()
+	cfg.ApplyEnvWithSources(src)
+
+	if src["github.token"] != "env: GITHUB_TOKEN" {
+		t.Errorf("src[github.token] = %q, want %q", src["github.token"], "env: GITHUB_TOKEN")
+	}
+}
+
+func TestApplyEnvWithSourcesCIProjectPath(t *testing.T) {
+	t.Setenv("CI_PROJECT_ID", "")
+	t.Setenv("CI_PROJECT_PATH", "group/project")
+
+	cfg := defaults()
+	src := defaultSources()
+	cfg.ApplyEnvWithSources(src)
+
+	if src["gitlab.project"] != "env: CI_PROJECT_PATH" {
+		t.Errorf("src[gitlab.project] = %q, want %q", src["gitlab.project"], "env: CI_PROJECT_PATH")
+	}
+}
+
+func TestApplyEnvWithSourcesGitLabToken(t *testing.T) {
+	t.Setenv("GITLAB_TOKEN", "mytoken")
+
+	cfg := defaults()
+	src := defaultSources()
+	cfg.ApplyEnvWithSources(src)
+
+	if src["gitlab.token"] != "env: GITLAB_TOKEN" {
+		t.Errorf("src[gitlab.token] = %q, want %q", src["gitlab.token"], "env: GITLAB_TOKEN")
+	}
+}
+
+func TestApplyEnvWithSourcesCIServerURL(t *testing.T) {
+	t.Setenv("CI_SERVER_URL", "https://gitlab.example.com")
+
+	cfg := defaults()
+	src := defaultSources()
+	cfg.ApplyEnvWithSources(src)
+
+	if src["gitlab.url"] != "env: CI_SERVER_URL" {
+		t.Errorf("src[gitlab.url] = %q, want %q", src["gitlab.url"], "env: CI_SERVER_URL")
+	}
+}
+
+func TestGradleEffectiveBuildFiles(t *testing.T) {
+	// Neither set → nil (opt-in)
+	if got := (GradleConfig{}).EffectiveBuildFiles(); got != nil {
+		t.Errorf("empty config: got %v, want nil", got)
+	}
+	// BuildFile only
+	if got := (GradleConfig{BuildFile: "build.gradle"}).EffectiveBuildFiles(); len(got) != 1 || got[0] != "build.gradle" {
+		t.Errorf("BuildFile only: got %v", got)
+	}
+	// BuildFiles wins over BuildFile
+	g := GradleConfig{BuildFile: "build.gradle", BuildFiles: []string{"a/build.gradle", "b/build.gradle"}}
+	if got := g.EffectiveBuildFiles(); len(got) != 2 || got[0] != "a/build.gradle" {
+		t.Errorf("BuildFiles priority: got %v", got)
+	}
+}
+
+func TestLoadGradleSources(t *testing.T) {
+	dir := t.TempDir()
+	content := "gradle:\n  build_file: \"build.gradle\"\n"
+	if err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	_, src, err := LoadWithSources(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if src["gradle.build_file"] != "config file" {
+		t.Errorf("src[gradle.build_file] = %q, want %q", src["gradle.build_file"], "config file")
+	}
+}
+
+func TestLoadGradleBuildFilesSources(t *testing.T) {
+	dir := t.TempDir()
+	content := "gradle:\n  build_files:\n    - \"a/build.gradle\"\n    - \"b/build.gradle\"\n"
+	if err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	_, src, err := LoadWithSources(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if src["gradle.build_files"] != "config file" {
+		t.Errorf("src[gradle.build_files] = %q, want %q", src["gradle.build_files"], "config file")
+	}
+}
+
+func TestPythonEffectivePaths(t *testing.T) {
+	if got := (PythonConfig{}).EffectivePaths(); got != nil {
+		t.Errorf("empty config: got %v, want nil", got)
+	}
+	if got := (PythonConfig{PyprojectTOML: "pyproject.toml"}).EffectivePaths(); len(got) != 1 || got[0] != "pyproject.toml" {
+		t.Errorf("single path: got %v", got)
+	}
+	p := PythonConfig{PyprojectTOML: "pyproject.toml", PyprojectTOMLs: []string{"a/pyproject.toml", "b/pyproject.toml"}}
+	if got := p.EffectivePaths(); len(got) != 2 || got[0] != "a/pyproject.toml" {
+		t.Errorf("multi-path priority: got %v", got)
+	}
+}
+
+func TestLoadPythonSources(t *testing.T) {
+	dir := t.TempDir()
+	content := "python:\n  pyproject_toml: \"pyproject.toml\"\n"
+	if err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	_, src, err := LoadWithSources(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if src["python.pyproject_toml"] != "config file" {
+		t.Errorf("src[python.pyproject_toml] = %q, want %q", src["python.pyproject_toml"], "config file")
+	}
+}
+
+func TestLoadPythonPathsSources(t *testing.T) {
+	dir := t.TempDir()
+	content := "python:\n  pyproject_tomls:\n    - \"a/pyproject.toml\"\n    - \"b/pyproject.toml\"\n"
+	if err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	_, src, err := LoadWithSources(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if src["python.pyproject_tomls"] != "config file" {
+		t.Errorf("src[python.pyproject_tomls] = %q, want %q", src["python.pyproject_tomls"], "config file")
+	}
+}
+
+func TestLoadNotifySources(t *testing.T) {
+	dir := t.TempDir()
+	content := `
+notify:
+  slack_webhook_url: "https://hooks.slack.example/x"
+  teams_webhook_url: "https://outlook.office.example/y"
+  google_chat_webhook_url: "https://chat.googleapis.example/z"
+  telegram_bot_token: "bot-token"
+  telegram_chat_id: "chat-1"
+  webhook_url: "https://example.com/webhook"
+`
+	if err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	cfg, src, err := LoadWithSources(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Notify.SlackWebhookURL != "https://hooks.slack.example/x" {
+		t.Errorf("SlackWebhookURL = %q", cfg.Notify.SlackWebhookURL)
+	}
+	if cfg.Notify.TeamsWebhookURL != "https://outlook.office.example/y" {
+		t.Errorf("TeamsWebhookURL = %q", cfg.Notify.TeamsWebhookURL)
+	}
+	if cfg.Notify.GoogleChatWebhookURL != "https://chat.googleapis.example/z" {
+		t.Errorf("GoogleChatWebhookURL = %q", cfg.Notify.GoogleChatWebhookURL)
+	}
+	if cfg.Notify.TelegramBotToken != "bot-token" {
+		t.Errorf("TelegramBotToken = %q", cfg.Notify.TelegramBotToken)
+	}
+	if cfg.Notify.TelegramChatID != "chat-1" {
+		t.Errorf("TelegramChatID = %q", cfg.Notify.TelegramChatID)
+	}
+	if cfg.Notify.WebhookURL != "https://example.com/webhook" {
+		t.Errorf("WebhookURL = %q", cfg.Notify.WebhookURL)
+	}
+
+	wantConfigFile := []string{
+		"notify.slack_webhook_url", "notify.teams_webhook_url", "notify.google_chat_webhook_url",
+		"notify.telegram_bot_token", "notify.telegram_chat_id", "notify.webhook_url",
+	}
+	for _, key := range wantConfigFile {
+		if got := src[key]; got != "config file" {
+			t.Errorf("src[%q] = %q, want %q", key, got, "config file")
+		}
+	}
+}
+
+func TestApplyEnvWithSourcesNotify(t *testing.T) {
+	t.Setenv("SLACK_WEBHOOK_URL", "https://hooks.slack.example/env")
+	t.Setenv("TEAMS_WEBHOOK_URL", "https://outlook.office.example/env")
+	t.Setenv("GOOGLE_CHAT_WEBHOOK_URL", "https://chat.googleapis.example/env")
+	t.Setenv("TELEGRAM_BOT_TOKEN", "env-bot-token")
+	t.Setenv("TELEGRAM_CHAT_ID", "env-chat-id")
+	t.Setenv("RELEASER_WEBHOOK_URL", "https://example.com/env-webhook")
+
+	cfg := defaults()
+	src := defaultSources()
+	cfg.ApplyEnvWithSources(src)
+
+	cases := []struct {
+		got, want, srcKey, wantSrc string
+	}{
+		{cfg.Notify.SlackWebhookURL, "https://hooks.slack.example/env", "notify.slack_webhook_url", "env: SLACK_WEBHOOK_URL"},
+		{cfg.Notify.TeamsWebhookURL, "https://outlook.office.example/env", "notify.teams_webhook_url", "env: TEAMS_WEBHOOK_URL"},
+		{cfg.Notify.GoogleChatWebhookURL, "https://chat.googleapis.example/env", "notify.google_chat_webhook_url", "env: GOOGLE_CHAT_WEBHOOK_URL"},
+		{cfg.Notify.TelegramBotToken, "env-bot-token", "notify.telegram_bot_token", "env: TELEGRAM_BOT_TOKEN"},
+		{cfg.Notify.TelegramChatID, "env-chat-id", "notify.telegram_chat_id", "env: TELEGRAM_CHAT_ID"},
+		{cfg.Notify.WebhookURL, "https://example.com/env-webhook", "notify.webhook_url", "env: RELEASER_WEBHOOK_URL"},
+	}
+	for _, c := range cases {
+		if c.got != c.want {
+			t.Errorf("got %q, want %q", c.got, c.want)
+		}
+		if src[c.srcKey] != c.wantSrc {
+			t.Errorf("src[%q] = %q, want %q", c.srcKey, src[c.srcKey], c.wantSrc)
+		}
+	}
+}
+
+func TestApplyEnvNotifyDoesNotOverwrite(t *testing.T) {
+	t.Setenv("SLACK_WEBHOOK_URL", "https://hooks.slack.example/env")
+
+	cfg := defaults()
+	cfg.Notify.SlackWebhookURL = "https://hooks.slack.example/config"
+	cfg.ApplyEnv()
+
+	if cfg.Notify.SlackWebhookURL != "https://hooks.slack.example/config" {
+		t.Errorf("SlackWebhookURL overwritten: got %q", cfg.Notify.SlackWebhookURL)
+	}
+}
+
 func TestLoadPartialOverride(t *testing.T) {
 	dir := t.TempDir()
 	// Only override tag_prefix — commit_message should keep its default

internal/ghclient/ghclient.go

@@ -0,0 +1,73 @@
+package ghclient
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+// Client is a minimal GitHub API client covering only the Releases endpoint.
+type Client struct {
+	token      string
+	repo       string // "owner/repo"
+	httpClient *http.Client
+}
+
+// New creates a Client. repo must be in "owner/repo" format.
+func New(token, repo string) *Client {
+	return &Client{
+		token: token,
+		repo:  repo,
+		httpClient: &http.Client{
+			Timeout: 30 * time.Second,
+		},
+	}
+}
+
+type createReleaseRequest struct {
+	TagName string `json:"tag_name"`
+	Name    string `json:"name"`
+	Body    string `json:"body"`
+}
+
+// CreateRelease creates a GitHub release on an existing tag.
+// The tag must already be pushed to the remote before calling this.
+func (c *Client) CreateRelease(ctx context.Context, tagName, body string) error {
+	payload, _ := json.Marshal(createReleaseRequest{
+		TagName: tagName,
+		Name:    tagName,
+		Body:    body,
+	})
+
+	url := fmt.Sprintf("https://api.github.com/repos/%s/releases", c.repo)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(payload))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", "Bearer "+c.token)
+	req.Header.Set("Accept", "application/vnd.github+json")
+	req.Header.Set("X-GitHub-Api-Version", "2022-11-28")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("GitHub API request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		var errBody struct {
+			Message string `json:"message"`
+		}
+		json.NewDecoder(resp.Body).Decode(&errBody) //nolint:errcheck
+		if errBody.Message != "" {
+			return fmt.Errorf("GitHub API returned %d: %s", resp.StatusCode, errBody.Message)
+		}
+		return fmt.Errorf("GitHub API returned %d", resp.StatusCode)
+	}
+
+	return nil
+}

internal/ghclient/ghclient_test.go

@@ -0,0 +1,138 @@
+package ghclient
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestNew(t *testing.T) {
+	c := New("tok", "owner/repo")
+	if c.token != "tok" || c.repo != "owner/repo" || c.httpClient == nil {
+		t.Fatalf("New fields: token=%q repo=%q httpClient=%v", c.token, c.repo, c.httpClient)
+	}
+}
+
+func TestCreateReleaseSuccess(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			t.Errorf("method = %q, want POST", r.Method)
+		}
+		if !strings.HasSuffix(r.URL.Path, "/releases") {
+			t.Errorf("path = %q, want .../releases", r.URL.Path)
+		}
+		if r.Header.Get("Authorization") != "Bearer test-token" {
+			t.Errorf("Authorization = %q", r.Header.Get("Authorization"))
+		}
+		var req struct {
+			TagName string `json:"tag_name"`
+			Name    string `json:"name"`
+			Body    string `json:"body"`
+		}
+		json.NewDecoder(r.Body).Decode(&req)
+		if req.TagName != "v1.0.0" {
+			t.Errorf("tag_name = %q, want v1.0.0", req.TagName)
+		}
+		w.WriteHeader(http.StatusCreated)
+		io.WriteString(w, `{}`)
+	}))
+	defer srv.Close()
+
+	c := New("test-token", "owner/repo")
+	c.httpClient = srv.Client()
+	// Override the URL by pointing the client at the test server.
+	// We can't easily override the URL without a custom transport, so use a
+	// round-trip wrapper instead.
+	c.httpClient.Transport = rewriteTransport{base: http.DefaultTransport, target: srv.URL}
+
+	if err := c.CreateRelease(context.Background(), "v1.0.0", "release notes"); err != nil {
+		t.Fatalf("CreateRelease: %v", err)
+	}
+}
+
+func TestCreateReleaseAPIError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusUnprocessableEntity)
+		io.WriteString(w, `{"message":"Validation Failed"}`)
+	}))
+	defer srv.Close()
+
+	c := New("tok", "owner/repo")
+	c.httpClient = &http.Client{Transport: rewriteTransport{base: http.DefaultTransport, target: srv.URL}}
+
+	err := c.CreateRelease(context.Background(), "v1.0.0", "body")
+	if err == nil {
+		t.Fatal("expected error for 422 response")
+	}
+	if !strings.Contains(err.Error(), "422") {
+		t.Errorf("error should mention status code: %v", err)
+	}
+}
+
+func TestCreateReleaseAPIErrorNoMessage(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+		io.WriteString(w, `not json`)
+	}))
+	defer srv.Close()
+
+	c := New("tok", "owner/repo")
+	c.httpClient = &http.Client{Transport: rewriteTransport{base: http.DefaultTransport, target: srv.URL}}
+
+	err := c.CreateRelease(context.Background(), "v1.0.0", "body")
+	if err == nil {
+		t.Fatal("expected error for 500 response")
+	}
+	if !strings.Contains(err.Error(), "500") {
+		t.Errorf("error should mention status code: %v", err)
+	}
+}
+
+func TestCreateReleaseRequestFails(t *testing.T) {
+	c := New("tok", "owner/repo")
+	// Use a transport that always fails.
+	c.httpClient = &http.Client{Transport: alwaysFailTransport{}}
+
+	err := c.CreateRelease(context.Background(), "v1.0.0", "body")
+	if err == nil {
+		t.Fatal("expected error when HTTP request fails")
+	}
+}
+
+func TestCreateReleaseBadURL(t *testing.T) {
+	// A repo containing a null byte makes the URL unparseable by http.NewRequestWithContext.
+	c := New("tok", "owner/repo\x00bad")
+
+	err := c.CreateRelease(context.Background(), "v1.0.0", "body")
+	if err == nil {
+		t.Fatal("expected error for invalid URL")
+	}
+}
+
+// rewriteTransport redirects all requests to a test server URL.
+type rewriteTransport struct {
+	base   http.RoundTripper
+	target string
+}
+
+func (rt rewriteTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	req2 := req.Clone(req.Context())
+	req2.URL.Scheme = "http"
+	req2.URL.Host = strings.TrimPrefix(rt.target, "http://")
+	return rt.base.RoundTrip(req2)
+}
+
+// alwaysFailTransport returns an error for every request.
+type alwaysFailTransport struct{}
+
+func (alwaysFailTransport) RoundTrip(*http.Request) (*http.Response, error) {
+	return nil, &testTransportError{"connection refused"}
+}
+
+type testTransportError struct{ msg string }
+
+func (e *testTransportError) Error() string { return e.msg }

internal/gitutil/gitutil.go

@@ -3,15 +3,19 @@ package gitutil
 import (
 	"errors"
 	"fmt"
+	"os"
+	"os/exec"
 	"sort"
+	"strings"
 	"time"
 
 	gogit "github.com/go-git/go-git/v5"
 	gitconfig "github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/object"
-	githttp "github.com/go-git/go-git/v5/plumbing/transport/http"
 	"github.com/go-git/go-git/v5/plumbing/storer"
+	githttp "github.com/go-git/go-git/v5/plumbing/transport/http"
+	gitssh "github.com/go-git/go-git/v5/plumbing/transport/ssh"
 
 	"git.k3nny.fr/releaser/internal/branch"
 )
@@ -81,23 +85,21 @@ func LatestTag(repo *gogit.Repository, info branch.Info) (string, int, error) {
 			return nil
 		}
 
-		commitHash, err := resolveTagToCommit(repo, ref)
+		tagCommit, err := resolveTagToCommitObj(repo, ref)
 		if err != nil {
 			return nil // silently skip malformed tags
 		}
 
-		tagCommit, err := repo.CommitObject(commitHash)
-		if err != nil {
-			return nil
-		}
-
 		if tagCommit.Hash == headCommit.Hash {
 			candidates = append(candidates, tagCandidate{name, patch})
 			return nil
 		}
 
 		anc, err := tagCommit.IsAncestor(headCommit)
-		if err != nil || !anc {
+		if err != nil {
+			return err
+		}
+		if !anc {
 			return nil
 		}
 
@@ -194,15 +196,17 @@ func AuthorFromConfig(repo *gogit.Repository) (name, email string) {
 	return
 }
 
-// CommitFile stages filePath (relative to worktree root) and creates a commit.
+// CommitFiles stages all filePaths (relative to worktree root) and creates a commit.
-func CommitFile(repo *gogit.Repository, filePath, message, authorName, authorEmail string) (plumbing.Hash, error) {
+func CommitFiles(repo *gogit.Repository, filePaths []string, message, authorName, authorEmail string) (plumbing.Hash, error) {
 	w, err := repo.Worktree()
 	if err != nil {
 		return plumbing.ZeroHash, err
 	}
 
-	if _, err := w.Add(filePath); err != nil {
+	for _, p := range filePaths {
-		return plumbing.ZeroHash, fmt.Errorf("git add %s: %w", filePath, err)
+		if _, err := w.Add(p); err != nil {
+			return plumbing.ZeroHash, fmt.Errorf("git add %s: %w", p, err)
+		}
 	}
 
 	hash, err := w.Commit(message, &gogit.CommitOptions{
@@ -218,6 +222,11 @@ func CommitFile(repo *gogit.Repository, filePath, message, authorName, authorEma
 	return hash, nil
 }
 
+// CommitFile stages a single file and creates a commit.
+func CommitFile(repo *gogit.Repository, filePath, message, authorName, authorEmail string) (plumbing.Hash, error) {
+	return CommitFiles(repo, []string{filePath}, message, authorName, authorEmail)
+}
+
 // CreateTag creates a lightweight tag on HEAD.
 func CreateTag(repo *gogit.Repository, tagName string) error {
 	head, err := repo.Head()
@@ -230,10 +239,42 @@ func CreateTag(repo *gogit.Repository, tagName string) error {
 	return nil
 }
 
+// sshPush is the function used for SSH agent push; replaced in tests to avoid requiring a live agent.
+var sshPush = pushWithSSHAgent
+
+// newSSHAgentAuth creates an SSH agent auth method; replaced in tests.
+var newSSHAgentAuth = gitssh.NewSSHAgentAuth
+
 // Push pushes the given branch and tag to the "origin" remote.
-// If token is non-empty, HTTPS basic auth (oauth2/token) is used.
+// When token is non-empty, go-git is used with HTTPS basic auth (oauth2/token) — suitable for CI.
-// Passing an empty token lets go-git use the system credential helper or SSH agent.
+// When token is empty and the remote URL is SSH, go-git SSH agent auth is attempted first.
+// Falls back to the system git binary so that credential helpers, netrc, and SSH keys work normally.
 func Push(repo *gogit.Repository, branchName, tagName, token string) error {
+	if token != "" {
+		return pushWithGoGit(repo, branchName, tagName, token)
+	}
+	// Try SSH agent auth when the remote URL uses SSH transport.
+	if remote, err := repo.Remote("origin"); err == nil {
+		urls := remote.Config().URLs
+		if len(urls) > 0 && isSSHURL(urls[0]) {
+			if err := sshPush(repo, branchName, tagName); err == nil {
+				return nil
+			}
+		}
+	}
+	return pushWithCLI(repo, branchName, tagName)
+}
+
+func isSSHURL(u string) bool {
+	return strings.HasPrefix(u, "git@") || strings.HasPrefix(u, "ssh://")
+}
+
+func pushWithSSHAgent(repo *gogit.Repository, branchName, tagName string) error {
+	auth, err := newSSHAgentAuth("git")
+	if err != nil {
+		return err
+	}
+
 	remote, err := repo.Remote("origin")
 	if err != nil {
 		return fmt.Errorf("remote origin not found: %w", err)
@@ -244,13 +285,30 @@ func Push(repo *gogit.Repository, branchName, tagName, token string) error {
 			gitconfig.RefSpec(fmt.Sprintf("refs/heads/%s:refs/heads/%s", branchName, branchName)),
 			gitconfig.RefSpec(fmt.Sprintf("refs/tags/%s:refs/tags/%s", tagName, tagName)),
 		},
+		Auth: auth,
 	}
 
-	if token != "" {
+	if err := remote.Push(opts); err != nil && !errors.Is(err, gogit.NoErrAlreadyUpToDate) {
-		opts.Auth = &githttp.BasicAuth{
+		return fmt.Errorf("git push via SSH agent: %w", err)
+	}
+	return nil
+}
+
+func pushWithGoGit(repo *gogit.Repository, branchName, tagName, token string) error {
+	remote, err := repo.Remote("origin")
+	if err != nil {
+		return fmt.Errorf("remote origin not found: %w", err)
+	}
+
+	opts := &gogit.PushOptions{
+		RefSpecs: []gitconfig.RefSpec{
+			gitconfig.RefSpec(fmt.Sprintf("refs/heads/%s:refs/heads/%s", branchName, branchName)),
+			gitconfig.RefSpec(fmt.Sprintf("refs/tags/%s:refs/tags/%s", tagName, tagName)),
+		},
+		Auth: &githttp.BasicAuth{
 			Username: "oauth2",
 			Password: token,
-		}
+		},
 	}
 
 	if err := remote.Push(opts); err != nil && !errors.Is(err, gogit.NoErrAlreadyUpToDate) {
@@ -259,22 +317,49 @@ func Push(repo *gogit.Repository, branchName, tagName, token string) error {
 	return nil
 }
 
-// resolveTagToCommit follows tag objects until it reaches a commit.
+func pushWithCLI(repo *gogit.Repository, branchName, tagName string) error {
+	wt, err := repo.Worktree()
+	if err != nil {
+		return fmt.Errorf("get worktree: %w", err)
+	}
+
+	cmd := exec.Command("git", "-C", wt.Filesystem.Root(), "push", "origin",
+		fmt.Sprintf("HEAD:refs/heads/%s", branchName),
+		fmt.Sprintf("refs/tags/%s:refs/tags/%s", tagName, tagName),
+	)
+	cmd.Stdout = os.Stderr // git push status goes to stderr conventionally
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("git push: %w", err)
+	}
+	return nil
+}
+
+// resolveTagToCommitObj follows tag objects until it reaches a commit and returns it.
 // Handles both lightweight tags (ref → commit) and annotated tags (ref → tag object → … → commit).
-func resolveTagToCommit(repo *gogit.Repository, ref *plumbing.Reference) (plumbing.Hash, error) {
+func resolveTagToCommitObj(repo *gogit.Repository, ref *plumbing.Reference) (*object.Commit, error) {
 	hash := ref.Hash()
 	for {
 		obj, err := repo.Object(plumbing.AnyObject, hash)
 		if err != nil {
-			return plumbing.ZeroHash, err
+			return nil, err
 		}
 		switch o := obj.(type) {
 		case *object.Commit:
-			return o.Hash, nil
+			return o, nil
 		case *object.Tag:
 			hash = o.Target
 		default:
-			return plumbing.ZeroHash, fmt.Errorf("unexpected object type %s at %s", obj.Type(), hash)
+			return nil, fmt.Errorf("unexpected object type %s at %s", obj.Type(), hash)
 		}
 	}
 }
+
+// resolveTagToCommit follows tag objects until it reaches a commit and returns its hash.
+func resolveTagToCommit(repo *gogit.Repository, ref *plumbing.Reference) (plumbing.Hash, error) {
+	c, err := resolveTagToCommitObj(repo, ref)
+	if err != nil {
+		return plumbing.ZeroHash, err
+	}
+	return c.Hash, nil
+}

internal/gitutil/gitutil_test.go

@@ -1,6 +1,7 @@
 package gitutil
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -11,6 +12,7 @@ import (
 	gitconfig "github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/object"
+	gitssh "github.com/go-git/go-git/v5/plumbing/transport/ssh"
 
 	"git.k3nny.fr/releaser/internal/branch"
 )
@@ -699,3 +701,410 @@ func TestPushWithBareRemote(t *testing.T) {
 		t.Fatalf("second Push returned unexpected error: %v", err)
 	}
 }
+
+// ── IsWorkingTreeClean: w.Status() error path ────────────────────────────────
+
+func TestIsWorkingTreeCleanCorruptIndex(t *testing.T) {
+	// Use a filesystem repo so we can corrupt the on-disk index.
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "chore: init", "initial")
+
+	// Overwrite .git/index with garbage so go-git fails to parse it.
+	indexPath := filepath.Join(dir, ".git", "index")
+	if err := os.WriteFile(indexPath, []byte("not a valid git index"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	// Reopen — fresh repository object with no cached index.
+	repo2, err := gogit.PlainOpen(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = IsWorkingTreeClean(repo2)
+	if err == nil {
+		t.Error("expected error when git index is corrupt")
+	}
+}
+
+// ── LatestTag: head commit object missing ────────────────────────────────────
+
+func TestLatestTagHeadCommitMissing(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	addTag(t, repo, "v1.2.0")
+
+	// Detach HEAD to a fake hash that has no backing commit object.
+	fakeHash := plumbing.NewHash("deadbeefdeadbeefdeadbeefdeadbeefdeadbeef")
+	if err := repo.Storer.SetReference(plumbing.NewHashReference(plumbing.HEAD, fakeHash)); err != nil {
+		t.Fatal(err)
+	}
+
+	_, _, err := LatestTag(repo, branch.Info{Major: 1, Minor: 2, TagPrefix: "v"})
+	if err == nil {
+		t.Error("expected error when HEAD commit object is missing")
+	}
+}
+
+// ── LatestTag: Tags() iterator fails ────────────────────────────────────────
+
+func TestLatestTagTagsIterFails(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+
+	if os.Getuid() == 0 {
+		t.Skip("skipping: chmod restrictions do not apply when running as root")
+	}
+
+	// Make .git/refs/tags/ unreadable so that go-git's walkReferencesTree
+	// returns EPERM when it tries to list the directory, triggering the
+	// Tags() error path.
+	tagsDir := filepath.Join(dir, ".git", "refs", "tags")
+	os.Chmod(tagsDir, 0000)
+	t.Cleanup(func() { os.Chmod(tagsDir, 0755) })
+
+	// Reopen so the filesystem storer holds no cached state.
+	repo2, err := gogit.PlainOpen(dir)
+	if err != nil {
+		t.Fatalf("PlainOpen: %v", err)
+	}
+
+	_, _, err = LatestTag(repo2, branch.Info{Major: 1, Minor: 2, TagPrefix: "v"})
+	if err == nil {
+		t.Error("expected error when refs/tags is unreadable")
+	}
+}
+
+// ── LatestTag: IsAncestor fails → ForEach propagates error ───────────────────
+
+func TestLatestTagIsAncestorFails(t *testing.T) {
+	// Topology: c0 (base) → c1 (sibling branch, tagged v1.2.0)
+	//                      → c2 (master HEAD — diverged from sibling)
+	// The tag is NOT an ancestor of HEAD. IsAncestor must walk master's history
+	// all the way back to c0; corrupting c0 makes that walk fail.
+	repo, dir := newTestRepo(t)
+	c0 := addCommit(t, repo, dir, "chore: base", "base")
+
+	w, _ := repo.Worktree()
+	if err := w.Checkout(&gogit.CheckoutOptions{
+		Branch: plumbing.NewBranchReferenceName("sibling"),
+		Hash:   c0,
+		Create: true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	addCommit(t, repo, dir, "feat: sibling work", "sibling")
+	addTag(t, repo, "v1.2.0") // tag on the sibling commit (not an ancestor of master)
+
+	if err := w.Checkout(&gogit.CheckoutOptions{
+		Branch: plumbing.NewBranchReferenceName("master"),
+	}); err != nil {
+		t.Fatal(err)
+	}
+	addCommit(t, repo, dir, "fix: mainline", "mainline") // HEAD on master
+
+	// Corrupt c0 (the common base) so that IsAncestor's commit-graph walk
+	// fails when it tries to read c0 as a parent of the master HEAD commit.
+	hashStr := c0.String()
+	objPath := filepath.Join(dir, ".git", "objects", hashStr[:2], hashStr[2:])
+	if err := os.Chmod(objPath, 0644); err != nil {
+		t.Fatalf("chmod object: %v", err)
+	}
+	if err := os.WriteFile(objPath, []byte("corrupt"), 0444); err != nil {
+		t.Fatal(err)
+	}
+
+	repo2, err := gogit.PlainOpen(dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// The ForEach callback propagates the IsAncestor error, so LatestTag
+	// must return a non-nil error (covers the refs.ForEach error path).
+	_, _, err = LatestTag(repo2, branch.Info{Major: 1, Minor: 2, TagPrefix: "v"})
+	if err == nil {
+		t.Error("expected error when commit graph is corrupt during IsAncestor")
+	}
+}
+
+// ── CommitsSince: repo.Head() fails after tag resolve ────────────────────────
+
+func TestCommitsSinceHeadRemoved(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	addTag(t, repo, "v1.2.0")
+
+	// Remove HEAD so repo.Head() returns ErrReferenceNotFound.
+	if err := repo.Storer.RemoveReference(plumbing.HEAD); err != nil {
+		t.Fatal(err)
+	}
+
+	_, err := CommitsSince(repo, "v1.2.0")
+	if err == nil {
+		t.Error("expected error when HEAD reference is missing")
+	}
+}
+
+// ── CommitsSince: repo.Log() fails ───────────────────────────────────────────
+
+func TestCommitsSinceFakeHead(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	addTag(t, repo, "v1.2.0")
+	addCommit(t, repo, dir, "fix: c2", "v2")
+
+	// Point HEAD directly to a non-existent commit hash.
+	// repo.Head() succeeds (returns the hash) but repo.Log() fails eagerly.
+	fakeHash := plumbing.NewHash("cafebabecafebabecafebabecafebabecafebabe")
+	if err := repo.Storer.SetReference(plumbing.NewHashReference(plumbing.HEAD, fakeHash)); err != nil {
+		t.Fatal(err)
+	}
+
+	_, err := CommitsSince(repo, "v1.2.0")
+	if err == nil {
+		t.Error("expected error when HEAD commit object is missing")
+	}
+}
+
+// ── AllCommits: repo.Log() fails ─────────────────────────────────────────────
+
+func TestAllCommitsFakeHead(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+
+	// Point HEAD to a non-existent commit hash so repo.Log() fails eagerly.
+	fakeHash := plumbing.NewHash("deadbeefdeadbeefdeadbeefdeadbeefdeadbeef")
+	if err := repo.Storer.SetReference(plumbing.NewHashReference(plumbing.HEAD, fakeHash)); err != nil {
+		t.Fatal(err)
+	}
+
+	_, err := AllCommits(repo)
+	if err == nil {
+		t.Error("expected error when HEAD commit object is missing")
+	}
+}
+
+// ── CommitFiles: w.Commit() fails ────────────────────────────────────────────
+
+func TestCommitFilesUnchanged(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "chore: init", "initial")
+
+	// test.txt already committed and unchanged — w.Add succeeds, w.Commit fails
+	// (go-git rejects empty commits when AllowEmptyCommits is false).
+	_, err := CommitFiles(repo, []string{"test.txt"}, "chore: empty", "Test", "t@t.com")
+	if err == nil {
+		t.Error("expected error when committing unchanged file (empty commit)")
+	}
+}
+
+// ── Push: SSH agent success / failure paths ──────────────────────────────────
+
+func TestPushSSHAgentSucceeds(t *testing.T) {
+	// Mock sshPush so it succeeds without a real SSH agent.
+	orig := sshPush
+	sshPush = func(_ *gogit.Repository, _, _ string) error { return nil }
+	defer func() { sshPush = orig }()
+
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	if _, err := repo.CreateRemote(&gitconfig.RemoteConfig{
+		Name: "origin",
+		URLs: []string{"git@example.com:owner/repo.git"},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := Push(repo, "master", "v1.0.0", ""); err != nil {
+		t.Fatalf("Push with mocked SSH agent should succeed: %v", err)
+	}
+}
+
+func TestPushSSHAgentFailsFallsBackToCLI(t *testing.T) {
+	// SSH URL remote + sshPush fails → falls through to pushWithCLI.
+	orig := sshPush
+	sshPush = func(_ *gogit.Repository, _, _ string) error { return fmt.Errorf("no agent") }
+	defer func() { sshPush = orig }()
+
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	if _, err := repo.CreateRemote(&gitconfig.RemoteConfig{
+		Name: "origin",
+		URLs: []string{"git@example.com:owner/repo.git"},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	// CLI push will fail (no real remote) — we just verify it ran at all.
+	err := Push(repo, "master", "v1.0.0", "")
+	if err == nil {
+		t.Error("expected error after SSH fallback to CLI with unreachable remote")
+	}
+}
+
+// ── pushWithSSHAgent internals ────────────────────────────────────────────────
+
+func TestPushWithSSHAgentAuthFails(t *testing.T) {
+	orig := newSSHAgentAuth
+	newSSHAgentAuth = func(_ string) (*gitssh.PublicKeysCallback, error) {
+		return nil, fmt.Errorf("SSH_AUTH_SOCK not set")
+	}
+	defer func() { newSSHAgentAuth = orig }()
+
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+
+	err := pushWithSSHAgent(repo, "master", "v1.0.0")
+	if err == nil {
+		t.Error("expected error when SSH agent auth fails")
+	}
+}
+
+func TestPushWithSSHAgentNoRemote(t *testing.T) {
+	orig := newSSHAgentAuth
+	newSSHAgentAuth = func(user string) (*gitssh.PublicKeysCallback, error) {
+		return &gitssh.PublicKeysCallback{User: user}, nil
+	}
+	defer func() { newSSHAgentAuth = orig }()
+
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	// No remote configured → repo.Remote("origin") fails.
+
+	err := pushWithSSHAgent(repo, "master", "v1.0.0")
+	if err == nil {
+		t.Error("expected error when no origin remote is configured")
+	}
+}
+
+func TestPushWithSSHAgentPushFails(t *testing.T) {
+	orig := newSSHAgentAuth
+	newSSHAgentAuth = func(user string) (*gitssh.PublicKeysCallback, error) {
+		return &gitssh.PublicKeysCallback{User: user}, nil
+	}
+	defer func() { newSSHAgentAuth = orig }()
+
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	addTag(t, repo, "v1.0.0")
+	if _, err := repo.CreateRemote(&gitconfig.RemoteConfig{
+		Name: "origin",
+		URLs: []string{"/nonexistent/bare/repo"},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	err := pushWithSSHAgent(repo, "master", "v1.0.0")
+	if err == nil {
+		t.Error("expected error when remote push fails")
+	}
+}
+
+func TestPushWithSSHAgentSuccess(t *testing.T) {
+	remoteDir := t.TempDir()
+	if _, err := gogit.PlainInit(remoteDir, true); err != nil {
+		t.Fatal(err)
+	}
+
+	orig := newSSHAgentAuth
+	newSSHAgentAuth = func(user string) (*gitssh.PublicKeysCallback, error) {
+		return &gitssh.PublicKeysCallback{User: user}, nil
+	}
+	defer func() { newSSHAgentAuth = orig }()
+
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	addTag(t, repo, "v1.0.0")
+	if _, err := repo.CreateRemote(&gitconfig.RemoteConfig{
+		Name: "origin",
+		URLs: []string{remoteDir},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	// Local transport ignores auth — push succeeds regardless of the mock callback.
+	if err := pushWithSSHAgent(repo, "master", "v1.0.0"); err != nil {
+		t.Fatalf("expected success pushing to local bare remote: %v", err)
+	}
+}
+
+// ── pushWithGoGit error paths ─────────────────────────────────────────────────
+
+func TestPushWithGoGitNoRemote(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	// No remote → repo.Remote("origin") fails inside pushWithGoGit.
+	err := Push(repo, "master", "v1.0.0", "some-token")
+	if err == nil {
+		t.Error("expected error when no origin remote is configured")
+	}
+}
+
+func TestPushWithGoGitPushFails(t *testing.T) {
+	repo, dir := newTestRepo(t)
+	addCommit(t, repo, dir, "fix: c1", "v1")
+	addTag(t, repo, "v1.0.0")
+	if _, err := repo.CreateRemote(&gitconfig.RemoteConfig{
+		Name: "origin",
+		URLs: []string{"/nonexistent/bare/repo"},
+	}); err != nil {
+		t.Fatal(err)
+	}
+	err := Push(repo, "master", "v1.0.0", "some-token")
+	if err == nil {
+		t.Error("expected error when remote push fails")
+	}
+}
+
+// ── pushWithCLI: bare repo → no worktree ────────────────────────────────────
+
+func TestPushWithCLIBareRepo(t *testing.T) {
+	dir := t.TempDir()
+	repo, err := gogit.PlainInit(dir, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// No token, no SSH URL → goes to pushWithCLI → Worktree() fails for bare repo.
+	err = Push(repo, "master", "v1.0.0", "")
+	if err == nil {
+		t.Error("expected error for bare repo (no worktree)")
+	}
+}
+
+func TestPushWithCLISuccess(t *testing.T) {
+	// Non-bare repo + local bare remote + no token + no SSH URL → pushWithCLI → success.
+	repo, dir := newTestRepo(t)
+	sig := testSig()
+
+	wt, _ := repo.Worktree()
+	if err := os.WriteFile(filepath.Join(dir, "f.txt"), []byte("x"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	wt.Add("f.txt")
+	hash, err := wt.Commit("init", &gogit.CommitOptions{Author: sig})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := repo.CreateTag("v1.0.0", hash, nil); err != nil {
+		t.Fatal(err)
+	}
+
+	remoteDir := t.TempDir()
+	if _, err := gogit.PlainInit(remoteDir, true); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := repo.CreateRemote(&gitconfig.RemoteConfig{
+		Name: "origin",
+		URLs: []string{remoteDir},
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	// Detect default branch name (go-git uses "master" but git config may differ).
+	head, _ := repo.Head()
+	branchName := head.Name().Short()
+
+	if err := Push(repo, branchName, "v1.0.0", ""); err != nil {
+		t.Fatalf("pushWithCLI success: %v", err)
+	}
+}

internal/gradle/gradle.go

@@ -0,0 +1,54 @@
+package gradle
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+)
+
+// versionRe matches a Gradle/Kotlin DSL version assignment on its own line.
+// Group 1 captures the version string (without quotes).
+// Handles both double-quoted (Kotlin/Groovy) and single-quoted (Groovy) forms,
+// with or without spaces around =.
+var versionRe = regexp.MustCompile(`(?m)^[ \t]*version\s*=\s*["']([^"']+)["']`)
+
+// ReadVersion returns the version value from a build.gradle or build.gradle.kts file.
+func ReadVersion(path string) (string, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", fmt.Errorf("read %s: %w", path, err)
+	}
+	m := versionRe.FindStringSubmatch(string(data))
+	if m == nil {
+		return "", fmt.Errorf("no version assignment found in %s", path)
+	}
+	return m[1], nil
+}
+
+// WriteVersion replaces the version assignment in a build.gradle or build.gradle.kts
+// file in-place. oldVersion must match what ReadVersion returned. Quote style is preserved.
+func WriteVersion(path, oldVersion, newVersion string) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("read %s: %w", path, err)
+	}
+	updated, ok := replaceVersion(string(data), oldVersion, newVersion)
+	if !ok {
+		return fmt.Errorf("version %q not found in %s", oldVersion, path)
+	}
+	return os.WriteFile(path, []byte(updated), 0644)
+}
+
+// replaceVersion finds and replaces the first version assignment line in a Gradle build file.
+// Quote style (single or double) of the original line is preserved.
+// Returns the updated content and true if a replacement was made.
+func replaceVersion(content, oldVersion, newVersion string) (string, bool) {
+	re := regexp.MustCompile(`(?m)^([ \t]*version\s*=\s*)(["'])` + regexp.QuoteMeta(oldVersion) + `["']`)
+	m := re.FindStringSubmatchIndex(content)
+	if m == nil {
+		return content, false
+	}
+	prefix := content[m[2]:m[3]] // "version = " etc., preserving whitespace
+	quote := content[m[4]:m[5]]  // " or '
+	return content[:m[0]] + prefix + quote + newVersion + quote + content[m[1]:], true
+}

internal/gradle/gradle_test.go

@@ -0,0 +1,183 @@
+package gradle
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+const gradleGroovy = `plugins {
+    id 'java'
+}
+
+group = 'com.example'
+version = '1.2.3'
+description = 'My project'
+`
+
+const gradleKotlin = `plugins {
+    kotlin("jvm") version "1.9.0"
+}
+
+group = "com.example"
+version = "1.2.3"
+description = "My project"
+`
+
+func writeGradle(t *testing.T, content string) string {
+	t.Helper()
+	path := filepath.Join(t.TempDir(), "build.gradle")
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}
+
+// ── ReadVersion ──────────────────────────────────────────────────────────────
+
+func TestReadVersionGroovy(t *testing.T) {
+	got, err := ReadVersion(writeGradle(t, gradleGroovy))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionKotlin(t *testing.T) {
+	got, err := ReadVersion(writeGradle(t, gradleKotlin))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionNoSpaces(t *testing.T) {
+	got, err := ReadVersion(writeGradle(t, `version="1.0.0"`))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.0.0" {
+		t.Errorf("got %q, want 1.0.0", got)
+	}
+}
+
+func TestReadVersionMissingFile(t *testing.T) {
+	_, err := ReadVersion(filepath.Join(t.TempDir(), "build.gradle"))
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestReadVersionNoVersionField(t *testing.T) {
+	_, err := ReadVersion(writeGradle(t, `group = "com.example"`))
+	if err == nil {
+		t.Error("expected error when no version assignment is present")
+	}
+}
+
+// ── WriteVersion ─────────────────────────────────────────────────────────────
+
+func TestWriteVersionKotlin(t *testing.T) {
+	path := writeGradle(t, gradleKotlin)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	data, _ := os.ReadFile(path)
+	if !strings.Contains(string(data), `version = "1.2.4"`) {
+		t.Errorf("expected updated version; got:\n%s", data)
+	}
+	// plugin version declaration must not be touched
+	if !strings.Contains(string(data), `kotlin("jvm") version "1.9.0"`) {
+		t.Error("plugin version was incorrectly modified")
+	}
+}
+
+func TestWriteVersionGroovy(t *testing.T) {
+	path := writeGradle(t, gradleGroovy)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	data, _ := os.ReadFile(path)
+	if !strings.Contains(string(data), `version = '1.2.4'`) {
+		t.Errorf("expected updated version with single quotes; got:\n%s", data)
+	}
+}
+
+func TestWriteVersionMissingFile(t *testing.T) {
+	err := WriteVersion(filepath.Join(t.TempDir(), "build.gradle"), "1.0.0", "1.0.1")
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestWriteVersionNotFound(t *testing.T) {
+	path := writeGradle(t, gradleKotlin)
+	err := WriteVersion(path, "9.9.9", "9.9.10")
+	if err == nil {
+		t.Error("expected error when old version not found in file")
+	}
+}
+
+func TestWriteVersionReadOnly(t *testing.T) {
+	if os.Getuid() == 0 {
+		t.Skip("skipping: chmod restrictions do not apply when running as root")
+	}
+	path := writeGradle(t, gradleKotlin)
+	os.Chmod(path, 0444)
+	defer os.Chmod(path, 0644)
+	err := WriteVersion(path, "1.2.3", "1.2.4")
+	if err == nil {
+		t.Error("expected error writing to read-only file")
+	}
+}
+
+// ── replaceVersion ────────────────────────────────────────────────────────────
+
+func TestReplaceVersionNotFound(t *testing.T) {
+	content := `group = "com.example"`
+	got, ok := replaceVersion(content, "1.0.0", "1.0.1")
+	if ok {
+		t.Error("expected ok=false when version not present")
+	}
+	if got != content {
+		t.Error("content should be unchanged when not found")
+	}
+}
+
+// ── fuzz ──────────────────────────────────────────────────────────────────────
+
+// FuzzReadVersion verifies ReadVersion never panics on arbitrary file content.
+func FuzzReadVersion(f *testing.F) {
+	f.Add(gradleGroovy)
+	f.Add(gradleKotlin)
+	f.Add(`version="1.0.0"`)
+	f.Add(`group = "com.example"`)
+	f.Add("")
+	f.Add("\x00\xff")
+
+	f.Fuzz(func(t *testing.T, content string) {
+		path := filepath.Join(t.TempDir(), "build.gradle")
+		os.WriteFile(path, []byte(content), 0644) //nolint:errcheck
+		ReadVersion(path)                          //nolint:errcheck
+	})
+}
+
+// FuzzWriteVersion verifies WriteVersion never panics on arbitrary content or version strings.
+func FuzzWriteVersion(f *testing.F) {
+	f.Add(gradleGroovy, "1.2.3", "1.2.4")
+	f.Add(gradleKotlin, "1.2.3", "1.2.4")
+	f.Add(`version="1.0.0"`, "1.0.0", "1.0.1")
+	f.Add("", "1.0.0", "1.0.1")
+	f.Add(`version = "1.0.0"`, "", "1.0.1")
+
+	f.Fuzz(func(t *testing.T, content, oldVersion, newVersion string) {
+		path := filepath.Join(t.TempDir(), "build.gradle")
+		os.WriteFile(path, []byte(content), 0644)  //nolint:errcheck
+		WriteVersion(path, oldVersion, newVersion)  //nolint:errcheck
+	})
+}

internal/node/node.go

@@ -0,0 +1,42 @@
+package node
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// ReadVersion returns the version field from a package.json file.
+func ReadVersion(path string) (string, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", fmt.Errorf("read %s: %w", path, err)
+	}
+	var pkg struct {
+		Version string `json:"version"`
+	}
+	if err := json.Unmarshal(data, &pkg); err != nil {
+		return "", fmt.Errorf("parse %s: %w", path, err)
+	}
+	if pkg.Version == "" {
+		return "", fmt.Errorf("no version field in %s", path)
+	}
+	return pkg.Version, nil
+}
+
+// WriteVersion replaces the version field in a package.json file in-place.
+// oldVersion must match what ReadVersion returned. Formatting is preserved.
+func WriteVersion(path, oldVersion, newVersion string) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("read %s: %w", path, err)
+	}
+	old := `"version": "` + oldVersion + `"`
+	repl := `"version": "` + newVersion + `"`
+	if !strings.Contains(string(data), old) {
+		return fmt.Errorf("version %q not found in %s", oldVersion, path)
+	}
+	updated := strings.Replace(string(data), old, repl, 1)
+	return os.WriteFile(path, []byte(updated), 0644)
+}

internal/node/node_test.go

@@ -0,0 +1,114 @@
+package node
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func writeJSON(t *testing.T, content string) string {
+	t.Helper()
+	path := filepath.Join(t.TempDir(), "package.json")
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}
+
+const simplePackage = `{
+  "name": "my-app",
+  "version": "1.2.3",
+  "description": "test"
+}`
+
+func TestReadVersion(t *testing.T) {
+	got, err := ReadVersion(writeJSON(t, simplePackage))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionMissingFile(t *testing.T) {
+	_, err := ReadVersion(filepath.Join(t.TempDir(), "package.json"))
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestReadVersionInvalidJSON(t *testing.T) {
+	_, err := ReadVersion(writeJSON(t, `{not valid json`))
+	if err == nil {
+		t.Error("expected error for invalid JSON")
+	}
+}
+
+func TestReadVersionNoVersionField(t *testing.T) {
+	_, err := ReadVersion(writeJSON(t, `{"name":"app"}`))
+	if err == nil {
+		t.Error("expected error when version field is absent")
+	}
+}
+
+func TestWriteVersion(t *testing.T) {
+	path := writeJSON(t, simplePackage)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	data, _ := os.ReadFile(path)
+	if !strings.Contains(string(data), `"version": "1.2.4"`) {
+		t.Errorf("expected updated version in file; got:\n%s", data)
+	}
+	// name and description must be preserved
+	if !strings.Contains(string(data), `"name": "my-app"`) {
+		t.Error("name field was lost")
+	}
+}
+
+func TestWriteVersionMissingFile(t *testing.T) {
+	err := WriteVersion(filepath.Join(t.TempDir(), "package.json"), "1.0.0", "1.0.1")
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestWriteVersionNotFound(t *testing.T) {
+	err := WriteVersion(writeJSON(t, simplePackage), "9.9.9", "9.9.10")
+	if err == nil {
+		t.Error("expected error when old version not found")
+	}
+}
+
+// FuzzWriteVersion verifies WriteVersion never panics on arbitrary content or version strings.
+func FuzzWriteVersion(f *testing.F) {
+	f.Add(simplePackage, "1.2.3", "1.2.4")
+	f.Add(`{"version":"0.0.1"}`, "0.0.1", "0.0.2")
+	f.Add(`{}`, "1.0.0", "1.0.1")
+	f.Add("", "1.0.0", "1.0.1")
+	f.Add(`{"name":"app","version":"1.0.0","version":"dup"}`, "1.0.0", "1.0.1")
+
+	f.Fuzz(func(t *testing.T, content, oldVersion, newVersion string) {
+		path := filepath.Join(t.TempDir(), "package.json")
+		os.WriteFile(path, []byte(content), 0644) //nolint:errcheck
+		WriteVersion(path, oldVersion, newVersion) //nolint:errcheck
+	})
+}
+
+// FuzzReadVersion verifies ReadVersion never panics on arbitrary content.
+func FuzzReadVersion(f *testing.F) {
+	f.Add(simplePackage)
+	f.Add(`{}`)
+	f.Add(`{"version":"1.0.0"}`)
+	f.Add(`not json at all`)
+	f.Add(``)
+	f.Add("\x00\xff")
+
+	f.Fuzz(func(t *testing.T, content string) {
+		path := filepath.Join(t.TempDir(), "package.json")
+		os.WriteFile(path, []byte(content), 0644) //nolint:errcheck
+		ReadVersion(path)                          //nolint:errcheck
+	})
+}

internal/notes/notes.go

@@ -2,38 +2,16 @@ package notes
 
 import (
 	"fmt"
-	"regexp"
 	"strings"
 
 	"git.k3nny.fr/releaser/internal/commits"
 )
 
-// headerSubjectRe captures the subject (description) part of a conventional commit header.
-var headerSubjectRe = regexp.MustCompile(`(?i)^\w+(?:\([^)]*\))?!?\s*:\s*(.+)`)
-
 // Generate produces grouped markdown release notes from a list of commit messages.
 // Commits are grouped into Breaking Changes, Features, and Bug Fixes.
 // Commits with no releasable type are omitted.
 func Generate(tagName string, messages []string) string {
-	var breaking, feats, fixes []string
+	breaking, feats, fixes := commits.Group(messages)
-
-	for _, msg := range messages {
-		t := commits.Parse(msg)
-		if t == commits.TypeNone {
-			continue
-		}
-		first := strings.SplitN(strings.TrimSpace(msg), "\n", 2)[0]
-		subject := extractSubject(first)
-
-		switch t {
-		case commits.TypeBreaking:
-			breaking = append(breaking, subject)
-		case commits.TypeFeat:
-			feats = append(feats, subject)
-		case commits.TypeFix:
-			fixes = append(fixes, subject)
-		}
-	}
 
 	var sb strings.Builder
 	fmt.Fprintf(&sb, "## %s\n", tagName)
@@ -53,13 +31,3 @@ func writeSection(sb *strings.Builder, title string, items []string) {
 		fmt.Fprintf(sb, "- %s\n", item)
 	}
 }
-
-// extractSubject returns the description part of a conventional commit header.
-// Falls back to the raw header if the pattern does not match.
-func extractSubject(header string) string {
-	m := headerSubjectRe.FindStringSubmatch(header)
-	if m != nil {
-		return strings.TrimSpace(m[1])
-	}
-	return strings.TrimSpace(header)
-}

internal/notes/notes_test.go

@@ -69,25 +69,6 @@ func TestGenerateEmpty(t *testing.T) {
 	}
 }
 
-func TestExtractSubject(t *testing.T) {
-	cases := []struct {
-		header string
-		want   string
-	}{
-		{"feat: add login", "add login"},
-		{"feat(auth): add OAuth2", "add OAuth2"},
-		{"feat!: remove API", "remove API"},
-		{"FIX:typo", "typo"},
-		{"plain message", "plain message"},
-	}
-	for _, c := range cases {
-		got := extractSubject(c.header)
-		if got != c.want {
-			t.Errorf("extractSubject(%q) = %q, want %q", c.header, got, c.want)
-		}
-	}
-}
-
 // FuzzGenerate verifies that Generate never panics on arbitrary inputs and
 // always includes the tag name in the output.
 func FuzzGenerate(f *testing.F) {

internal/notify/googlechat.go

@@ -0,0 +1,20 @@
+package notify
+
+import (
+	"context"
+	"fmt"
+)
+
+// googleChatPayload matches the Google Chat Incoming Webhook contract: a
+// single "text" field.
+type googleChatPayload struct {
+	Text string `json:"text"`
+}
+
+func newGoogleChatPayload(msg Message) googleChatPayload {
+	return googleChatPayload{Text: fmt.Sprintf("*Released %s*\n\n%s", msg.Version, msg.Notes)}
+}
+
+func sendGoogleChat(ctx context.Context, webhookURL string, msg Message) error {
+	return postJSON(ctx, webhookURL, newGoogleChatPayload(msg))
+}

internal/notify/googlechat_test.go

@@ -0,0 +1,37 @@
+package notify
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestSendGoogleChat(t *testing.T) {
+	var got googleChatPayload
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		json.NewDecoder(r.Body).Decode(&got) //nolint:errcheck
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	if err := sendGoogleChat(context.Background(), srv.URL, Message{Version: "v1.2.3", Notes: "- feat: y"}); err != nil {
+		t.Fatalf("sendGoogleChat: %v", err)
+	}
+	if !strings.Contains(got.Text, "v1.2.3") || !strings.Contains(got.Text, "feat: y") {
+		t.Errorf("payload text = %q", got.Text)
+	}
+}
+
+func TestSendGoogleChatError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+	}))
+	defer srv.Close()
+
+	if err := sendGoogleChat(context.Background(), srv.URL, Message{Version: "v1.0.0"}); err == nil {
+		t.Fatal("expected error for 400 response")
+	}
+}

internal/notify/notify.go

@@ -0,0 +1,88 @@
+// Package notify sends best-effort release notifications to chat and webhook targets.
+package notify
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+// Message is the content of a release notification, shared across all targets.
+type Message struct {
+	Version string // tag name, e.g. "v1.2.3"
+	Notes   string // release notes body
+}
+
+// Config holds the destination for every supported notification target.
+// Every field is opt-in — a target is skipped when its required fields are empty.
+type Config struct {
+	SlackWebhookURL      string
+	TeamsWebhookURL      string
+	GoogleChatWebhookURL string
+	TelegramBotToken     string
+	TelegramChatID       string
+	WebhookURL           string
+}
+
+var httpClient = &http.Client{Timeout: 15 * time.Second}
+
+// SendAll sends msg to every target configured in cfg. Each target is attempted
+// independently — a failure on one does not prevent the others from being tried.
+// Returns one error per failed target, or nil if every configured target
+// succeeded (or none were configured).
+func SendAll(ctx context.Context, cfg Config, msg Message) []error {
+	var errs []error
+
+	if cfg.SlackWebhookURL != "" {
+		if err := sendSlack(ctx, cfg.SlackWebhookURL, msg); err != nil {
+			errs = append(errs, fmt.Errorf("slack: %w", err))
+		}
+	}
+	if cfg.TeamsWebhookURL != "" {
+		if err := sendTeams(ctx, cfg.TeamsWebhookURL, msg); err != nil {
+			errs = append(errs, fmt.Errorf("teams: %w", err))
+		}
+	}
+	if cfg.GoogleChatWebhookURL != "" {
+		if err := sendGoogleChat(ctx, cfg.GoogleChatWebhookURL, msg); err != nil {
+			errs = append(errs, fmt.Errorf("google chat: %w", err))
+		}
+	}
+	if cfg.TelegramBotToken != "" && cfg.TelegramChatID != "" {
+		if err := sendTelegram(ctx, cfg.TelegramBotToken, cfg.TelegramChatID, msg); err != nil {
+			errs = append(errs, fmt.Errorf("telegram: %w", err))
+		}
+	}
+	if cfg.WebhookURL != "" {
+		if err := sendWebhook(ctx, cfg.WebhookURL, msg); err != nil {
+			errs = append(errs, fmt.Errorf("webhook: %w", err))
+		}
+	}
+
+	return errs
+}
+
+// postJSON POSTs payload as JSON to url and treats any non-2xx response as an error.
+func postJSON(ctx context.Context, url string, payload any) error {
+	body, _ := json.Marshal(payload) // payload fields are always plain strings — Marshal cannot fail here
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("returned status %d", resp.StatusCode)
+	}
+	return nil
+}

internal/notify/notify_fuzz_test.go

@@ -0,0 +1,28 @@
+package notify
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+)
+
+// FuzzMessagePayloads verifies that building a notification payload never
+// panics on arbitrary version/notes strings, no matter the target — release
+// notes are generated from free-form commit messages and end up embedded in
+// every payload below.
+func FuzzMessagePayloads(f *testing.F) {
+	f.Add("v1.2.3", "release notes")
+	f.Add("", "")
+	f.Add("v1.0.0", "* markdown _weird_ [chars] `code` <html> & \"quotes\"")
+	f.Add("tag\nwith\nnewline", "notes\x00with\xffbinary")
+	f.Add("v1.0.0", strings.Repeat("x", 10000))
+
+	f.Fuzz(func(t *testing.T, version, notes string) {
+		msg := Message{Version: version, Notes: notes}
+		_, _ = json.Marshal(newSlackPayload(msg))
+		_, _ = json.Marshal(newGoogleChatPayload(msg))
+		_, _ = json.Marshal(newTeamsPayload(msg))
+		_, _ = json.Marshal(newTelegramPayload("chat-id", msg))
+		_, _ = json.Marshal(newWebhookPayload(msg))
+	})
+}

internal/notify/notify_test.go

@@ -0,0 +1,137 @@
+package notify
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+// alwaysFailTransport returns an error for every request.
+type alwaysFailTransport struct{}
+
+func (alwaysFailTransport) RoundTrip(*http.Request) (*http.Response, error) {
+	return nil, &testTransportError{"connection refused"}
+}
+
+type testTransportError struct{ msg string }
+
+func (e *testTransportError) Error() string { return e.msg }
+
+func TestPostJSONSuccess(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	if err := postJSON(context.Background(), srv.URL, map[string]string{"a": "b"}); err != nil {
+		t.Fatalf("postJSON: %v", err)
+	}
+}
+
+func TestPostJSONBadURL(t *testing.T) {
+	err := postJSON(context.Background(), "http://\x00bad", map[string]string{"a": "b"})
+	if err == nil {
+		t.Fatal("expected error for invalid URL")
+	}
+}
+
+func TestPostJSONRequestFails(t *testing.T) {
+	orig := httpClient
+	httpClient = &http.Client{Transport: alwaysFailTransport{}}
+	defer func() { httpClient = orig }()
+
+	err := postJSON(context.Background(), "http://127.0.0.1:1", map[string]string{"a": "b"})
+	if err == nil {
+		t.Fatal("expected error when HTTP request fails")
+	}
+}
+
+func TestPostJSONNon2xx(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+	}))
+	defer srv.Close()
+
+	err := postJSON(context.Background(), srv.URL, map[string]string{"a": "b"})
+	if err == nil {
+		t.Fatal("expected error for 500 response")
+	}
+}
+
+func TestSendAllNoneConfigured(t *testing.T) {
+	errs := SendAll(context.Background(), Config{}, Message{Version: "v1.0.0"})
+	if errs != nil {
+		t.Fatalf("expected no errors, got %v", errs)
+	}
+}
+
+func TestSendAllAllSucceed(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	origBase := telegramAPIBase
+	telegramAPIBase = srv.URL
+	defer func() { telegramAPIBase = origBase }()
+
+	cfg := Config{
+		SlackWebhookURL:      srv.URL,
+		TeamsWebhookURL:      srv.URL,
+		GoogleChatWebhookURL: srv.URL,
+		TelegramBotToken:     "tok",
+		TelegramChatID:       "123",
+		WebhookURL:           srv.URL,
+	}
+	errs := SendAll(context.Background(), cfg, Message{Version: "v1.0.0", Notes: "notes"})
+	if errs != nil {
+		t.Fatalf("expected no errors, got %v", errs)
+	}
+}
+
+func TestSendAllAllFail(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+	}))
+	defer srv.Close()
+
+	origBase := telegramAPIBase
+	telegramAPIBase = srv.URL
+	defer func() { telegramAPIBase = origBase }()
+
+	cfg := Config{
+		SlackWebhookURL:      srv.URL,
+		TeamsWebhookURL:      srv.URL,
+		GoogleChatWebhookURL: srv.URL,
+		TelegramBotToken:     "tok",
+		TelegramChatID:       "123",
+		WebhookURL:           srv.URL,
+	}
+	errs := SendAll(context.Background(), cfg, Message{Version: "v1.0.0"})
+	if len(errs) != 5 {
+		t.Fatalf("expected 5 errors, got %d: %v", len(errs), errs)
+	}
+}
+
+func TestSendAllTelegramRequiresBothFields(t *testing.T) {
+	calls := 0
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		calls++
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	origBase := telegramAPIBase
+	telegramAPIBase = srv.URL
+	defer func() { telegramAPIBase = origBase }()
+
+	// Only bot token set — chat ID missing — Telegram target must be skipped.
+	errs := SendAll(context.Background(), Config{TelegramBotToken: "tok"}, Message{Version: "v1.0.0"})
+	if errs != nil {
+		t.Fatalf("expected no errors, got %v", errs)
+	}
+	if calls != 0 {
+		t.Fatalf("expected telegram to be skipped, got %d calls", calls)
+	}
+}

internal/notify/slack.go

@@ -0,0 +1,20 @@
+package notify
+
+import (
+	"context"
+	"fmt"
+)
+
+// slackPayload matches the Slack Incoming Webhook contract: a single "text"
+// field, interpreted as Slack mrkdwn.
+type slackPayload struct {
+	Text string `json:"text"`
+}
+
+func newSlackPayload(msg Message) slackPayload {
+	return slackPayload{Text: fmt.Sprintf("*Released %s*\n\n%s", msg.Version, msg.Notes)}
+}
+
+func sendSlack(ctx context.Context, webhookURL string, msg Message) error {
+	return postJSON(ctx, webhookURL, newSlackPayload(msg))
+}

internal/notify/slack_test.go

@@ -0,0 +1,40 @@
+package notify
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestSendSlack(t *testing.T) {
+	var got slackPayload
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if ct := r.Header.Get("Content-Type"); ct != "application/json" {
+			t.Errorf("Content-Type = %q", ct)
+		}
+		json.NewDecoder(r.Body).Decode(&got) //nolint:errcheck
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	if err := sendSlack(context.Background(), srv.URL, Message{Version: "v1.2.3", Notes: "- fix: x"}); err != nil {
+		t.Fatalf("sendSlack: %v", err)
+	}
+	if !strings.Contains(got.Text, "v1.2.3") || !strings.Contains(got.Text, "fix: x") {
+		t.Errorf("payload text = %q", got.Text)
+	}
+}
+
+func TestSendSlackError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusForbidden)
+	}))
+	defer srv.Close()
+
+	if err := sendSlack(context.Background(), srv.URL, Message{Version: "v1.0.0"}); err == nil {
+		t.Fatal("expected error for 403 response")
+	}
+}

internal/notify/teams.go

@@ -0,0 +1,31 @@
+package notify
+
+import (
+	"context"
+	"fmt"
+)
+
+// teamsPayload is a Microsoft Teams "Incoming Webhook" O365 connector card
+// (MessageCard schema) — the format Teams webhook URLs still accept.
+type teamsPayload struct {
+	Type    string `json:"@type"`
+	Context string `json:"@context"`
+	Summary string `json:"summary"`
+	Title   string `json:"title"`
+	Text    string `json:"text"`
+}
+
+func newTeamsPayload(msg Message) teamsPayload {
+	title := fmt.Sprintf("Released %s", msg.Version)
+	return teamsPayload{
+		Type:    "MessageCard",
+		Context: "http://schema.org/extensions",
+		Summary: title,
+		Title:   title,
+		Text:    msg.Notes,
+	}
+}
+
+func sendTeams(ctx context.Context, webhookURL string, msg Message) error {
+	return postJSON(ctx, webhookURL, newTeamsPayload(msg))
+}

internal/notify/teams_test.go

@@ -0,0 +1,43 @@
+package notify
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestSendTeams(t *testing.T) {
+	var got teamsPayload
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		json.NewDecoder(r.Body).Decode(&got) //nolint:errcheck
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	if err := sendTeams(context.Background(), srv.URL, Message{Version: "v1.2.3", Notes: "- fix: z"}); err != nil {
+		t.Fatalf("sendTeams: %v", err)
+	}
+	if got.Type != "MessageCard" {
+		t.Errorf("Type = %q, want MessageCard", got.Type)
+	}
+	if !strings.Contains(got.Title, "v1.2.3") || !strings.Contains(got.Summary, "v1.2.3") {
+		t.Errorf("Title/Summary = %q/%q, want to contain v1.2.3", got.Title, got.Summary)
+	}
+	if !strings.Contains(got.Text, "fix: z") {
+		t.Errorf("Text = %q", got.Text)
+	}
+}
+
+func TestSendTeamsError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusServiceUnavailable)
+	}))
+	defer srv.Close()
+
+	if err := sendTeams(context.Background(), srv.URL, Message{Version: "v1.0.0"}); err == nil {
+		t.Fatal("expected error for 503 response")
+	}
+}

internal/notify/telegram.go

@@ -0,0 +1,30 @@
+package notify
+
+import (
+	"context"
+	"fmt"
+)
+
+// telegramAPIBase is the Telegram Bot API host. Overridden in tests.
+var telegramAPIBase = "https://api.telegram.org"
+
+// telegramPayload matches the Telegram Bot API sendMessage contract. Notes
+// are sent as plain text (no parse_mode) — release notes come from arbitrary
+// commit messages and are not guaranteed to be valid Telegram Markdown/HTML,
+// and a malformed entity makes the whole request fail with a 400.
+type telegramPayload struct {
+	ChatID string `json:"chat_id"`
+	Text   string `json:"text"`
+}
+
+func newTelegramPayload(chatID string, msg Message) telegramPayload {
+	return telegramPayload{
+		ChatID: chatID,
+		Text:   fmt.Sprintf("Released %s\n\n%s", msg.Version, msg.Notes),
+	}
+}
+
+func sendTelegram(ctx context.Context, botToken, chatID string, msg Message) error {
+	url := fmt.Sprintf("%s/bot%s/sendMessage", telegramAPIBase, botToken)
+	return postJSON(ctx, url, newTelegramPayload(chatID, msg))
+}

internal/notify/telegram_test.go

@@ -0,0 +1,53 @@
+package notify
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestSendTelegram(t *testing.T) {
+	var got telegramPayload
+	var path string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		path = r.URL.Path
+		json.NewDecoder(r.Body).Decode(&got) //nolint:errcheck
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	orig := telegramAPIBase
+	telegramAPIBase = srv.URL
+	defer func() { telegramAPIBase = orig }()
+
+	if err := sendTelegram(context.Background(), "bot-token", "chat-1", Message{Version: "v1.2.3", Notes: "notes body"}); err != nil {
+		t.Fatalf("sendTelegram: %v", err)
+	}
+	if !strings.Contains(path, "bot-token") {
+		t.Errorf("path = %q, want to contain bot token", path)
+	}
+	if got.ChatID != "chat-1" {
+		t.Errorf("ChatID = %q, want chat-1", got.ChatID)
+	}
+	if !strings.Contains(got.Text, "v1.2.3") || !strings.Contains(got.Text, "notes body") {
+		t.Errorf("Text = %q", got.Text)
+	}
+}
+
+func TestSendTelegramError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+	}))
+	defer srv.Close()
+
+	orig := telegramAPIBase
+	telegramAPIBase = srv.URL
+	defer func() { telegramAPIBase = orig }()
+
+	if err := sendTelegram(context.Background(), "bot-token", "chat-1", Message{Version: "v1.0.0"}); err == nil {
+		t.Fatal("expected error for 400 response")
+	}
+}

internal/notify/webhook.go

@@ -0,0 +1,18 @@
+package notify
+
+import "context"
+
+// webhookPayload is a generic JSON envelope for arbitrary API webhooks
+// (e.g. n8n, Zapier, a custom receiver) that don't follow a chat-app schema.
+type webhookPayload struct {
+	Version string `json:"version"`
+	Notes   string `json:"notes"`
+}
+
+func newWebhookPayload(msg Message) webhookPayload {
+	return webhookPayload(msg)
+}
+
+func sendWebhook(ctx context.Context, url string, msg Message) error {
+	return postJSON(ctx, url, newWebhookPayload(msg))
+}

internal/notify/webhook_test.go

@@ -0,0 +1,39 @@
+package notify
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestSendWebhook(t *testing.T) {
+	var got webhookPayload
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		json.NewDecoder(r.Body).Decode(&got) //nolint:errcheck
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	if err := sendWebhook(context.Background(), srv.URL, Message{Version: "v1.2.3", Notes: "notes body"}); err != nil {
+		t.Fatalf("sendWebhook: %v", err)
+	}
+	if got.Version != "v1.2.3" {
+		t.Errorf("Version = %q, want v1.2.3", got.Version)
+	}
+	if got.Notes != "notes body" {
+		t.Errorf("Notes = %q, want %q", got.Notes, "notes body")
+	}
+}
+
+func TestSendWebhookError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+	}))
+	defer srv.Close()
+
+	if err := sendWebhook(context.Background(), srv.URL, Message{Version: "v1.0.0"}); err == nil {
+		t.Fatal("expected error for 500 response")
+	}
+}

internal/pyproject/pyproject.go

@@ -0,0 +1,74 @@
+package pyproject
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+)
+
+// sectionRe matches a TOML section from its header to the next header (or end of file).
+// TOML section headers always appear at the start of a line, so \n[ is a reliable boundary.
+var (
+	projectSectionRe = regexp.MustCompile(`(?s)\[project\].*?(?:\n\[|\z)`)
+	poetrySectionRe  = regexp.MustCompile(`(?s)\[tool\.poetry\].*?(?:\n\[|\z)`)
+)
+
+// versionLineRe matches version = "x.y.z" on its own line inside a section.
+var versionLineRe = regexp.MustCompile(`(?m)^version\s*=\s*"([^"]+)"`)
+
+// ReadVersion returns the project version from a pyproject.toml file.
+// It checks [project] (PEP 621) first, then [tool.poetry] (Poetry).
+func ReadVersion(path string) (string, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", fmt.Errorf("read %s: %w", path, err)
+	}
+	content := string(data)
+	for _, sectionRe := range []*regexp.Regexp{projectSectionRe, poetrySectionRe} {
+		section := sectionRe.FindString(content)
+		if section == "" {
+			continue
+		}
+		m := versionLineRe.FindStringSubmatch(section)
+		if m != nil {
+			return m[1], nil
+		}
+	}
+	return "", fmt.Errorf("no version found in %s", path)
+}
+
+// WriteVersion replaces the project version in a pyproject.toml file in-place.
+// oldVersion must match what ReadVersion returned.
+func WriteVersion(path, oldVersion, newVersion string) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("read %s: %w", path, err)
+	}
+	updated, ok := replaceVersion(string(data), oldVersion, newVersion)
+	if !ok {
+		return fmt.Errorf("version %q not found in %s", oldVersion, path)
+	}
+	return os.WriteFile(path, []byte(updated), 0644)
+}
+
+// replaceVersion finds and replaces the version in the first [project] or [tool.poetry]
+// section that contains it. Returns the updated content and true on success.
+// regexp.QuoteMeta is used so version strings with dots or specials are safe.
+func replaceVersion(content, oldVersion, newVersion string) (string, bool) {
+	re := regexp.MustCompile(`(?m)^(version\s*=\s*)"` + regexp.QuoteMeta(oldVersion) + `"`)
+	for _, sectionRe := range []*regexp.Regexp{projectSectionRe, poetrySectionRe} {
+		loc := sectionRe.FindStringIndex(content)
+		if loc == nil {
+			continue
+		}
+		section := content[loc[0]:loc[1]]
+		m := re.FindStringSubmatchIndex(section)
+		if m == nil {
+			continue
+		}
+		// m[0]:m[1] = full match; m[2]:m[3] = group 1 (prefix "version = ")
+		newSection := section[:m[0]] + section[m[2]:m[3]] + `"` + newVersion + `"` + section[m[1]:]
+		return content[:loc[0]] + newSection + content[loc[1]:], true
+	}
+	return content, false
+}

internal/pyproject/pyproject_test.go

@@ -0,0 +1,232 @@
+package pyproject
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+const pyprojectPEP621 = `[project]
+name = "my-package"
+version = "1.2.3"
+description = "A test package"
+dependencies = ["requests>=2.0", "click>=8.0"]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+`
+
+const pyprojectPoetry = `[tool.poetry]
+name = "my-package"
+version = "1.2.3"
+description = "A test package"
+
+[tool.poetry.dependencies]
+python = "^3.9"
+requests = "^2.0"
+`
+
+const pyprojectBoth = `[project]
+name = "my-package"
+version = "1.2.3"
+
+[tool.poetry]
+name = "my-package"
+version = "1.2.3"
+`
+
+const pyprojectBuildSystemFirst = `[build-system]
+requires = ["hatchling"]
+
+[project]
+name = "my-package"
+version = "1.2.3"
+`
+
+func writePyproject(t *testing.T, content string) string {
+	t.Helper()
+	path := filepath.Join(t.TempDir(), "pyproject.toml")
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}
+
+// ── ReadVersion ───────────────────────────────────────────────────────────────
+
+func TestReadVersionPEP621(t *testing.T) {
+	got, err := ReadVersion(writePyproject(t, pyprojectPEP621))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionPoetry(t *testing.T) {
+	got, err := ReadVersion(writePyproject(t, pyprojectPoetry))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionPEP621TakesPrecedence(t *testing.T) {
+	// When both [project] and [tool.poetry] are present, [project] wins.
+	got, err := ReadVersion(writePyproject(t, pyprojectBoth))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionBuildSystemIgnored(t *testing.T) {
+	// version under [build-system] must not be returned.
+	got, err := ReadVersion(writePyproject(t, pyprojectBuildSystemFirst))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if got != "1.2.3" {
+		t.Errorf("got %q, want 1.2.3", got)
+	}
+}
+
+func TestReadVersionMissingFile(t *testing.T) {
+	_, err := ReadVersion(filepath.Join(t.TempDir(), "pyproject.toml"))
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestReadVersionNoVersion(t *testing.T) {
+	_, err := ReadVersion(writePyproject(t, `[build-system]
+requires = ["hatchling"]
+`))
+	if err == nil {
+		t.Error("expected error when no version is found")
+	}
+}
+
+// ── WriteVersion ──────────────────────────────────────────────────────────────
+
+func TestWriteVersionPEP621(t *testing.T) {
+	path := writePyproject(t, pyprojectPEP621)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	data, _ := os.ReadFile(path)
+	s := string(data)
+	if !strings.Contains(s, `version = "1.2.4"`) {
+		t.Errorf("expected updated version; got:\n%s", s)
+	}
+	// build-system section must not be touched
+	if strings.Contains(s, `"hatchling>=1.2.4"`) {
+		t.Error("build-system section was incorrectly modified")
+	}
+}
+
+func TestWriteVersionPoetry(t *testing.T) {
+	path := writePyproject(t, pyprojectPoetry)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	data, _ := os.ReadFile(path)
+	if !strings.Contains(string(data), `version = "1.2.4"`) {
+		t.Errorf("expected updated version; got:\n%s", data)
+	}
+}
+
+func TestWriteVersionBothSectionsUpdatesProject(t *testing.T) {
+	path := writePyproject(t, pyprojectBoth)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	data, _ := os.ReadFile(path)
+	s := string(data)
+	// [project] version updated
+	if !strings.Contains(s, `[project]`) || strings.Index(s, `version = "1.2.4"`) > strings.Index(s, `[tool.poetry]`) {
+		t.Error("expected [project] version to be updated first")
+	}
+}
+
+func TestWriteVersionMissingFile(t *testing.T) {
+	err := WriteVersion(filepath.Join(t.TempDir(), "pyproject.toml"), "1.0.0", "1.0.1")
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestWriteVersionNotFound(t *testing.T) {
+	path := writePyproject(t, pyprojectPEP621)
+	err := WriteVersion(path, "9.9.9", "9.9.10")
+	if err == nil {
+		t.Error("expected error when old version not found")
+	}
+}
+
+func TestWriteVersionReadOnly(t *testing.T) {
+	if os.Getuid() == 0 {
+		t.Skip("skipping: chmod restrictions do not apply when running as root")
+	}
+	path := writePyproject(t, pyprojectPEP621)
+	os.Chmod(path, 0444)
+	defer os.Chmod(path, 0644)
+	if err := WriteVersion(path, "1.2.3", "1.2.4"); err == nil {
+		t.Error("expected error writing to read-only file")
+	}
+}
+
+// ── replaceVersion ────────────────────────────────────────────────────────────
+
+func TestReplaceVersionNotFound(t *testing.T) {
+	content := `[build-system]
+requires = ["hatchling"]
+`
+	got, ok := replaceVersion(content, "1.0.0", "1.0.1")
+	if ok {
+		t.Error("expected ok=false when no matching section")
+	}
+	if got != content {
+		t.Error("content should be unchanged when not found")
+	}
+}
+
+// ── fuzz ─────────────────────────────────────────────────────────────────────
+
+// FuzzReadVersion verifies ReadVersion never panics on arbitrary file content.
+func FuzzReadVersion(f *testing.F) {
+	f.Add(pyprojectPEP621)
+	f.Add(pyprojectPoetry)
+	f.Add(pyprojectBoth)
+	f.Add(`[project]` + "\n")
+	f.Add("")
+	f.Add("\x00\xff")
+
+	f.Fuzz(func(t *testing.T, content string) {
+		path := filepath.Join(t.TempDir(), "pyproject.toml")
+		os.WriteFile(path, []byte(content), 0644) //nolint:errcheck
+		ReadVersion(path)                          //nolint:errcheck
+	})
+}
+
+// FuzzWriteVersion verifies WriteVersion never panics on arbitrary content or version strings.
+func FuzzWriteVersion(f *testing.F) {
+	f.Add(pyprojectPEP621, "1.2.3", "1.2.4")
+	f.Add(pyprojectPoetry, "1.2.3", "1.2.4")
+	f.Add(pyprojectBoth, "1.2.3", "1.2.4")
+	f.Add("", "1.0.0", "1.0.1")
+	f.Add(`[project]`+"\n"+"version = \"1.0.0\"\n", "1.0.0", "1.0.1")
+
+	f.Fuzz(func(t *testing.T, content, oldVersion, newVersion string) {
+		path := filepath.Join(t.TempDir(), "pyproject.toml")
+		os.WriteFile(path, []byte(content), 0644)  //nolint:errcheck
+		WriteVersion(path, oldVersion, newVersion)  //nolint:errcheck
+	})
+}

internal/version/version.go

@@ -6,14 +6,38 @@ import (
 	"git.k3nny.fr/releaser/internal/commits"
 )
 
+// BumpLevel controls which version component is incremented.
+type BumpLevel int
+
+const (
+	BumpPatch BumpLevel = iota
+	BumpMinor
+)
+
 // Next computes the next version string (without tag prefix, e.g. "1.2.4").
 // currentPatch is -1 when no tag exists yet (first release will be X.Y.0).
+// releasable is the set of commit types that trigger a bump; nil defaults to all three.
+// bumpRules maps each type to its bump level; nil defaults to BumpPatch for all.
 // Returns ("", false) when there are no releasable commits.
-func Next(major, minor, currentPatch int, types []commits.Type) (string, bool) {
+func Next(major, minor, currentPatch int, types []commits.Type, releasable map[commits.Type]bool, bumpRules map[commits.Type]BumpLevel) (string, bool) {
+	if releasable == nil {
+		releasable = commits.ReleasableSet(nil)
+	}
+	found := false
+	useMinor := false
 	for _, t := range types {
-		if t != commits.TypeNone {
+		if releasable[t] {
-			return fmt.Sprintf("%d.%d.%d", major, minor, currentPatch+1), true
+			found = true
+			if bumpRules[t] == BumpMinor {
+				useMinor = true
 			}
 		}
+	}
+	if !found {
 		return "", false
 	}
+	if useMinor {
+		return fmt.Sprintf("%d.%d.0", major, minor+1), true
+	}
+	return fmt.Sprintf("%d.%d.%d", major, minor, currentPatch+1), true
+}

internal/version/version_test.go

@@ -30,7 +30,7 @@ func TestNext(t *testing.T) {
 			wantOk: true,
 		},
 		{
-			desc:         "breaking change still bumps patch on release branch",
+			desc:         "breaking change still bumps patch by default",
 			major:        2, minor: 0, currentPatch: 1,
 			types:  []commits.Type{commits.TypeBreaking},
 			want:   "2.0.2",
@@ -61,7 +61,7 @@ func TestNext(t *testing.T) {
 
 	for _, c := range cases {
 		t.Run(c.desc, func(t *testing.T) {
-			got, ok := Next(c.major, c.minor, c.currentPatch, c.types)
+			got, ok := Next(c.major, c.minor, c.currentPatch, c.types, nil, nil)
 			if ok != c.wantOk {
 				t.Errorf("ok=%v, want %v", ok, c.wantOk)
 			}
@@ -71,3 +71,73 @@ func TestNext(t *testing.T) {
 		})
 	}
 }
+
+func TestNextMinorBump(t *testing.T) {
+	rules := map[commits.Type]BumpLevel{
+		commits.TypeBreaking: BumpMinor,
+	}
+
+	cases := []struct {
+		desc         string
+		major, minor int
+		currentPatch int
+		types        []commits.Type
+		want         string
+	}{
+		{
+			desc:         "breaking → minor bump",
+			major:        1, minor: 2, currentPatch: 3,
+			types: []commits.Type{commits.TypeBreaking},
+			want:  "1.3.0",
+		},
+		{
+			desc:         "feat (patch rule) with breaking (minor rule) → minor wins",
+			major:        1, minor: 2, currentPatch: 3,
+			types: []commits.Type{commits.TypeFeat, commits.TypeBreaking},
+			want:  "1.3.0",
+		},
+		{
+			desc:         "fix only — no minor rule → patch bump",
+			major:        1, minor: 2, currentPatch: 3,
+			types: []commits.Type{commits.TypeFix},
+			want:  "1.2.4",
+		},
+		{
+			desc:         "first release with minor bump",
+			major:        2, minor: 0, currentPatch: -1,
+			types: []commits.Type{commits.TypeBreaking},
+			want:  "2.1.0",
+		},
+	}
+
+	for _, c := range cases {
+		t.Run(c.desc, func(t *testing.T) {
+			got, ok := Next(c.major, c.minor, c.currentPatch, c.types, nil, rules)
+			if !ok {
+				t.Fatal("expected ok=true")
+			}
+			if got != c.want {
+				t.Errorf("got %q, want %q", got, c.want)
+			}
+		})
+	}
+}
+
+func TestNextAllMinorRules(t *testing.T) {
+	rules := map[commits.Type]BumpLevel{
+		commits.TypeBreaking: BumpMinor,
+		commits.TypeFeat:     BumpMinor,
+		commits.TypeFix:      BumpMinor,
+	}
+	got, ok := Next(1, 4, 2, []commits.Type{commits.TypeFix}, nil, rules)
+	if !ok || got != "1.5.0" {
+		t.Errorf("got %q ok=%v, want 1.5.0 true", got, ok)
+	}
+}
+
+func TestNextNilBumpRulesDefaultsToPatch(t *testing.T) {
+	got, ok := Next(1, 2, 5, []commits.Type{commits.TypeBreaking}, nil, nil)
+	if !ok || got != "1.2.6" {
+		t.Errorf("got %q ok=%v, want 1.2.6 true", got, ok)
+	}
+}