docs(docs): update README, CHANGELOG, ROADMAP, Taskfile for v0.3.0

Document glint render, --no-warn, exit codes 2/10, --no-skipped, and
colorized output. Fix Taskfile validate entries: fixtures that now exit
10 (warnings only) require ignore_error: true to pass the validate task.

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

.gitignore

@@ -33,6 +33,11 @@ coverage.txt
 *.swo
 *~
 
+# VS Code extension build artifacts
+editors/vscode/node_modules/
+editors/vscode/out/
+editors/vscode/*.vsix
+
 # OS
 .DS_Store
 Thumbs.db

CHANGELOG.md

@@ -5,6 +5,50 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 This project uses [Semantic Versioning](https://semver.org).
 
+## [0.3.0] - 2026-06-26
+
+### Added
+
+- **`glint render` subcommand** — resolves all `include:` and `extends:` chains and writes the fully flattened pipeline to a single YAML file (default: `rendered.gitlab-ci.yml`; use `--output -` for stdout). Strips the consumed `include:` and `extends:` keys; retains template jobs (`.name`). Accepts the same network flags as `glint check` (`--token`, `--gitlab-url`, `--cache-dir`, `--offline`, `--proxy`). Useful for inspecting what GitLab CI actually sees or running further local tooling.
+
+- **`glint check --no-warn`** — discard all warning findings before output and exit-code calculation. Mixed pipelines (errors + warnings) still exit 2 but only errors are printed. Warnings-only pipelines report "OK" and exit 0.
+
+- **`glint graph --no-skipped`** — remove jobs that evaluate to `skipped` in the given context (or the implicit `branch=main` default) from all graph output: tree, SVG, HTML, and Mermaid.
+
+- **Colorized, columnized text output** — `glint check` (text format) now renders findings in four aligned columns: location, rule ID, severity, message. `error` is printed in bold red; `warning` in bold orange. Colors are auto-detected (stdout must be a terminal) and suppressed when `NO_COLOR` is set. Location uses `file:line:col` format when column information is available.
+
+- **`line:col` locations** — `Column int` added to `model.Job` (set from the YAML parser's `yaml.Node.Column`) and propagated to `Finding.Column` across all linter rules. Plain-text and `Finding.String()` now emit `file:line:col` when column is known.
+
+### Changed
+
+- **Exit codes** *(breaking)* — `glint check` now exits `2` when one or more error findings are present (previously `1`) and `10` when findings contain only warnings. Exit `0` remains for a clean pipeline. Errors take precedence over warnings. Scripts that test `[ $? -eq 1 ]` need to be updated to `[ $? -eq 2 ]`.
+
+## [0.2.31] - 2026-06-26
+
+### Added
+
+- **Proxy support** — `--proxy <URL>` flag on `glint check`, `glint graph`, and `glint lsp`; also configurable via `proxy:` in `.glint.yml`. When set it takes precedence over `HTTP_PROXY` / `HTTPS_PROXY` env vars; when unset, system proxy settings are honoured automatically. Covers all remote include fetches and GitLab API calls.
+
+- **GL045: HTTP remote include warning** — new pipeline-level lint rule that warns when `include: remote:` uses a plain `http://` URL. CI templates fetched over unencrypted HTTP are at risk of in-transit tampering; `https://` is always preferred.
+
+### Fixed
+
+- **Path traversal in local includes** — `include: local:` paths containing `../` sequences that would escape the repository root (e.g. `../../etc/passwd`) are now rejected with a warning instead of reading arbitrary files from the host.
+
+- **HTTP timeout on remote fetches** — all HTTP calls in `internal/fetcher` now use a 30-second timeout; previously the client had no timeout and could hang indefinitely on slow or unresponsive servers.
+
+- **Unbounded response size** — remote include and GitLab API responses are now capped at 10 MiB using `io.LimitReader`; previously an arbitrarily large response could exhaust process memory.
+
+- **Cache file permissions** — the cache directory is created with mode `0700` (was `0755`) and cache files with `0600` (was `0644`), preventing other local users from reading cached GitLab tokens or pipeline content.
+
+- **LSP Content-Length DoS** — `glint lsp` now rejects incoming messages whose `Content-Length` header exceeds 64 MiB, preventing memory exhaustion from a malicious or misbehaving LSP client.
+
+## [0.2.30] - 2026-06-26
+
+### Added
+
+- **VS Code extension** (`editors/vscode/`) — TypeScript extension that starts `glint lsp` as a language server and connects to it via `vscode-languageclient`. Activates on YAML files; the `documentSelector` restricts LSP processing to `**/.gitlab-ci.yml` so other YAML files are unaffected. Inline error/warning squiggles appear on every save or edit. The `glint.executablePath` setting controls the binary path (default: `glint` on `PATH`). Build: `task ext-compile`; package as `.vsix`: `task ext-package`.
+
 ## [0.2.29] - 2026-06-26
 
 ### Added

FEATURES.md

@@ -7,7 +7,7 @@ For planned work see [ROADMAP.md](ROADMAP.md).
 
 ## Lint rules
 
-Every finding carries a stable rule ID (`GL001` – `GL043`) that can be used to
+Every finding carries a stable rule ID (`GL001` – `GL045`) that can be used to
 suppress, filter, or look up the check. Run `glint explain <ID>` for a
 description, bad-YAML example, and fix.
 
@@ -19,6 +19,7 @@ description, bad-YAML example, and fix.
 | GL002 | ERR | `workflow.rules[*].when` must be `always` or `never` |
 | GL036 | ERR | `default.timeout` is not a valid GitLab CI duration string |
 | GL040 | WARN | A stage name appears more than once in `stages:` |
+| GL045 | WARN | `include: remote:` uses plain `http://` — CI templates fetched unencrypted; prefer `https://` |
 
 ### Job structure
 
@@ -243,9 +244,14 @@ url: https://gitlab.example.com
 
 # Default cache directory.
 cache_dir: ~/.cache/glint
+
+# HTTP proxy for remote includes and GitLab API calls.
+# Overrides HTTP_PROXY / HTTPS_PROXY env vars when set.
+# Leave empty to use system proxy settings.
+proxy: http://proxy.example.com:8080
 ```
 
-**Priority chain:** `--token`/`--gitlab-url` flags > `.glint.yml` > environment variables.
+**Priority chain:** `--token`/`--gitlab-url`/`--proxy` flags > `.glint.yml` > environment variables.
 
 ### Inline suppression (`# glint: ignore`)
 

README.md

@@ -6,7 +6,7 @@
 
 <p align="center">
   <a href="LICENSE"><img src="https://img.shields.io/badge/license-Apache%202.0-blue.svg" alt="License"></a>
-  <a href="CHANGELOG.md"><img src="https://img.shields.io/badge/release-v0.2.29-blue.svg" alt="Release"></a>
+  <a href="CHANGELOG.md"><img src="https://img.shields.io/badge/release-v0.3.0-blue.svg" alt="Release"></a>
 </p>
 
 > **Disclaimer:** This tool was built through iterative AI-assisted development with [Claude](https://claude.ai). It is experimental, incomplete, and not intended for production use. Coverage of GitLab CI keywords is best-effort and may lag behind GitLab's evolving spec. Use it at your own discretion — no correctness guarantees are made. Contributions and bug reports are welcome.
@@ -15,13 +15,15 @@ A local tool to validate and lint `.gitlab-ci.yml` pipelines without needing a G
 
 ## What it does
 
-- **Lints** — 43 rules covering pipeline structure, keyword constraints, `needs:`/`dependencies:` graphs, expression reachability, and deprecations (GL001–GL043); run `glint explain <ID>` for any rule
-- **Resolves includes** — local files, HTTPS URLs, GitLab project templates, and CI/CD Catalog components, with offline cache support
+- **Lints** — 45 rules covering pipeline structure, keyword constraints, `needs:`/`dependencies:` graphs, expression reachability, and deprecations (GL001–GL045); run `glint explain <ID>` for any rule
+- **Resolves includes** — local files, HTTPS URLs, GitLab project templates, and CI/CD Catalog components, with offline cache support and HTTP proxy support (`--proxy` flag or `proxy:` in `.glint.yml`)
+- **Renders merged pipeline** — `glint render` resolves all includes and `extends:` chains into a single flat YAML file, matching what GitLab CI actually processes
 - **Simulates context** — `--branch`, `--tag`, `--source` flags evaluate `rules:if:` and `only`/`except` to show which jobs would be active, manual, or skipped; `--context branch=main --context branch=develop` prints a multi-column comparison table across multiple contexts in one run
-- **Multiple output formats** — `--format text` (default, ruff-style), `json`, `sarif` (GitHub Code Scanning / GitLab SAST), `junit`, `github` (PR annotations)
-- **Project config** — `.glint.yml` for rule suppression, severity overrides, token/URL defaults; `# glint: ignore RULE` for per-job inline suppression
-- **Graph visualization** — `glint graph` prints a terminal job tree; `glint graph pipeline` renders a GitLab CI-style SVG/PNG; `--format mermaid` emits a Mermaid flowchart; `--format html` produces a self-contained HTML file with pan/zoom and a job-detail sidebar; context flags grey out skipped jobs
+- **Multiple output formats** — `--format text` (default, colorized and column-aligned), `json`, `sarif` (GitHub Code Scanning / GitLab SAST), `junit`, `github` (PR annotations); exits `2` on errors, `10` on warnings only
+- **Project config** — `.glint.yml` for rule suppression, severity overrides, token/URL/proxy defaults; `# glint: ignore RULE` for per-job inline suppression; `--no-warn` flag to suppress all warnings
+- **Graph visualization** — `glint graph` prints a terminal job tree; `glint graph pipeline` renders a GitLab CI-style SVG/PNG; `--format mermaid` emits a Mermaid flowchart; `--format html` produces a self-contained HTML file with pan/zoom and a job-detail sidebar; `--no-skipped` hides jobs that would not run in the given context
 - **LSP server** — `glint lsp` starts a Language Server Protocol server over stdin/stdout; connect with any LSP client to get inline diagnostics (rule ID as code, error/warning severity) in VS Code, Neovim, Emacs, JetBrains, etc.
+- **VS Code extension** — `editors/vscode/` wraps the LSP server; inline squiggles for every glint rule directly in the editor
 
 See [FEATURES.md](FEATURES.md) for the complete feature reference and lint rules table, and [ROADMAP.md](ROADMAP.md) for planned improvements.
 
@@ -108,6 +110,27 @@ Copy [`action.yml`](action.yml) from this repository, or mirror this repo to Git
 
 The action downloads the glint Linux binary into `$RUNNER_TEMP` and runs `glint check`. Only Linux runners are supported (matches the available release binary).
 
+### VS Code extension
+
+Clone this repository and load the extension from `editors/vscode/`:
+
+```bash
+cd editors/vscode
+npm install          # install dependencies (once)
+npm run compile      # compile TypeScript → out/
+```
+
+Then in VS Code: **Run → Start Debugging** (F5) — this opens an Extension Development Host with glint diagnostics active for any `.gitlab-ci.yml` you open.
+
+Make sure `glint` is on your `PATH`, or set `glint.executablePath` in VS Code settings to the full path of the binary.
+
+To package a `.vsix` for local installation:
+
+```bash
+task ext-package     # produces glint-X.Y.Z.vsix
+code --install-extension glint-X.Y.Z.vsix
+```
+
 ## Development
 
 This project uses [Task](https://taskfile.dev) as a task runner.
@@ -122,6 +145,9 @@ task ci           # full check: vet → test → build → validate
 task fuzz         # run fuzz tests for the YAML parser (Ctrl-C to stop; FUZZ_TIME=60s to set duration)
 task changelog    # regenerate CHANGELOG.md from git history via git-cliff
 task changelog-next  # preview unreleased section (dry-run, no file written)
+task ext-install     # install VS Code extension npm dependencies
+task ext-compile     # compile the VS Code extension TypeScript source
+task ext-package     # package the VS Code extension as a .vsix
 task build-windows  # cross-compile for Windows x64 (requires a tagged commit → glint-<tag>.exe)
 task build-linux    # cross-compile for Linux x64 (requires a tagged commit → glint-<tag>-linux-amd64)
 task clean        # remove build artifacts

ROADMAP.md

@@ -53,6 +53,7 @@ The current rule set covers the most common sources of broken pipelines. These a
 - [x] **Recursive include depth limit** — shipped v0.2.17; depth capped at 100 (matching GitLab); project/component includes now tracked in visited set to prevent cross-file cycles
 - [x] **Offline mode / cache** — shipped v0.2.17; `--cache-dir DIR` persists fetched templates; `--offline` serves from cache only; default cache dir (`~/.cache/glint`) used automatically with `--offline`
 - [x] **`include: inputs:`** — shipped v0.2.17; `$[[ inputs.KEY ]]` and `$[[ inputs.KEY | default(…) ]]` placeholders in fetched component YAML are substituted from the include's `with:` block before parsing
+- [x] **`glint render` subcommand** — shipped v0.3.0; resolves all `include:` and `extends:` chains into a single flat YAML file; strips consumed keys; accepts same network flags as `glint check`; default output `rendered.gitlab-ci.yml`, use `--output -` for stdout
 
 ---
 
@@ -79,6 +80,7 @@ The SVG renderer and terminal tree cover the basic layout. These would bring it
 - [x] **Mermaid pipeline output** — shipped v0.2.25; `glint graph pipeline --format mermaid` prints a Mermaid flowchart to stdout (paste into mermaid.live)
 - [x] **Same-stage job ordering** — shipped v0.2.26; jobs within a stage that have `needs:` between each other are placed in topological sub-columns (left-to-right by depth); stage header spans all sub-columns
 - [x] **Graph links rendered behind job chips** — shipped v0.2.26; SVG connectors (Bézier curves and bus-bar stubs) are drawn before job chips so lines pass behind rectangles
+- [x] **`glint graph --no-skipped`** — shipped v0.3.0; removes jobs evaluated as `skipped` in the given context from tree, SVG, HTML, and Mermaid output
 
 ---
 
@@ -86,6 +88,8 @@ The SVG renderer and terminal tree cover the basic layout. These would bring it
 
 - [x] **File and line numbers on findings** — shipped post-v0.2.0; every finding includes the source file and exact line of the job key; works across local includes, remote project templates, and fetched component templates
 - [x] **Ruff-style output format** — shipped v0.2.11; findings follow `file:line: RULEID [severity] message` matching the convention used by ruff and other modern linters
+- [x] **Colorized, columnized text output** — shipped v0.3.0; four aligned columns (location, rule, severity, message); `error` in bold red, `warning` in bold orange; auto-detected terminal color (respects `NO_COLOR`)
+- [x] **`line:col` locations** — shipped v0.3.0; `Column int` on `model.Job` and `Finding`; text output and `Finding.String()` emit `file:line:col` when column is known
 - [x] **`needs: optional: true` false-positive errors** — shipped post-v0.2.0; optional missing needs are downgraded to `[WARNING]`
 - [x] **`extends:` jobs with missing script false errors** — shipped post-v0.2.0; jobs using `extends:` that have no `script` after resolution emit `[WARNING]` (the script may come from an unfetchable remote base)
 - [x] **`rules:if:` static reachability (GL042)** — shipped v0.2.20; warns when all `rules:if:` conditions evaluate to false given declared variable values (only fires when all referenced vars are declared in YAML)
@@ -98,7 +102,7 @@ The SVG renderer and terminal tree cover the basic layout. These would bring it
 - [x] **GitHub Actions action** — shipped v0.2.28; `action.yml` composite action downloads the glint Linux binary and runs `glint check`; mirror to GitHub as `k3nny/glint` to reference as `uses: k3nny/glint@v0.2.28`
 - [x] **Pre-commit hook** — shipped v0.2.28; `.pre-commit-hooks.yaml` defines `language: golang` hook; pre-commit builds glint from source on first run and re-runs on staged `.gitlab-ci.yml` changes
 - [x] **LSP server** — shipped v0.2.29; `glint lsp` runs a JSON-RPC 2.0 LSP server over stdin/stdout; `textDocument/didOpen`, `didChange`, `didSave`, `didClose` all publish diagnostics; rule IDs appear as the diagnostic `code`; include resolution is best-effort using env-var token and default cache dir
-- [ ] **VS Code extension** — thin wrapper around the LSP server with syntax highlighting for `.gitlab-ci.yml`
+- [x] **VS Code extension** — shipped v0.2.30; `editors/vscode/` TypeScript extension wraps `glint lsp` via `vscode-languageclient`; activates on YAML files and restricts LSP processing to `**/.gitlab-ci.yml`; configurable binary path via `glint.executablePath`; build with `task ext-compile`, package with `task ext-package`
 
 ---
 
@@ -106,6 +110,18 @@ The SVG renderer and terminal tree cover the basic layout. These would bring it
 
 - [x] **`.glint.yml` config file** — shipped v0.2.19; `ignore:`, `severity:`, `stages:`, `token:`, `url:`, `cache_dir:`; searched from the pipeline directory up to the git root
 - [x] **Inline suppression comments** — shipped v0.2.19; `# glint: ignore GL007` before a job definition; comma/space-separated rules; `# glint: ignore all` wildcard
+- [x] **Proxy support** — shipped v0.2.31; `--proxy` flag on `check`, `graph`, and `lsp` subcommands; also configurable via `proxy:` in `.glint.yml`; overrides `HTTP_PROXY` / `HTTPS_PROXY` env vars when set
+
+---
+
+## Security & hardening
+
+- [x] **Path traversal guard for local includes** — shipped v0.2.31; `include: local:` paths containing `../../` or similar sequences are rejected instead of reading files outside the repository root
+- [x] **HTTP timeout on remote fetches** — shipped v0.2.31; all HTTP calls via the fetcher use a 30-second timeout to prevent indefinite hangs on slow or unresponsive servers
+- [x] **Unbounded response size cap** — shipped v0.2.31; remote include and GitLab API responses are capped at 10 MiB; responses exceeding the limit are rejected to prevent memory exhaustion
+- [x] **Cache file permissions** — shipped v0.2.31; cache directories are created with mode `0700` and cache files with mode `0600`; previously used world-readable `0755`/`0644`
+- [x] **GL045: HTTP remote include warning** — shipped v0.2.31; warns when `include: remote:` uses a plain `http://` URL; CI templates fetched unencrypted are at risk of tampering
+- [x] **LSP Content-Length DoS cap** — shipped v0.2.31; `glint lsp` rejects messages with `Content-Length` exceeding 64 MiB to prevent memory exhaustion from a malicious client
 
 ---
 
@@ -117,3 +133,5 @@ The SVG renderer and terminal tree cover the basic layout. These would bring it
 - [x] **Subcommand CLI** — shipped v0.2.0 (2026-06-11); `glint check` / `glint graph [mode]` with ruff-style `--help`
 - [x] **Changelog automation** — shipped v0.2.27; `cliff.toml` configures git-cliff to produce Keep-a-Changelog–compatible release notes from Conventional Commits; `task changelog` regenerates `CHANGELOG.md`, `task changelog-next` previews unreleased entries
 - [x] **Fuzz testing** — shipped v0.2.27; `FuzzParseBytes` and `FuzzSanitizeYAMLEscapes` in `internal/model/fuzz_test.go`; seeds run as regular tests in CI; `task fuzz` runs them continuously (default 30 s)
+- [x] **`glint check --no-warn`** — shipped v0.3.0; discards all warning findings before output and exit-code calculation; mixed pipelines (errors + warnings) still exit 2 but only errors are printed; warnings-only pipelines exit 0
+- [x] **Exit codes 2 / 10** *(breaking)* — shipped v0.3.0; `glint check` exits `2` when errors are present (previously `1`) and `10` when findings contain only warnings; exit `0` for clean

Taskfile.yml

@@ -68,31 +68,31 @@ tasks:
       - cmd: ./{{.BINARY}} check --branch feat/x testdata/rules_if_expr.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check testdata/workflow_vars.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check --branch main testdata/workflow_vars.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check --branch develop testdata/workflow_vars.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check --branch feat/x testdata/workflow_vars.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/workflow_escape.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/variable_refs.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check testdata/variable_refs_included.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check testdata/dead_rules.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/new_rules_valid.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check testdata/new_rules_invalid.yml
         ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/samba/.gitlab-ci.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/samba/.gitlab-ci-coverage.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/samba/.gitlab-ci-private.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check --format json testdata/valid.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check --format sarif testdata/valid.yml
@@ -104,15 +104,15 @@ tasks:
       - cmd: ./{{.BINARY}} check testdata/config_ignored/.gitlab-ci.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check testdata/config_severity/.gitlab-ci.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/config_suppress/.gitlab-ci.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/static_dead_rules.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/inherit_dead.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/inherit_dead_fields.yml
-        ignore_error: false
+        ignore_error: true
       - cmd: ./{{.BINARY}} check testdata/rules_needs_valid.yml
         ignore_error: false
       - cmd: ./{{.BINARY}} check testdata/rules_needs_invalid.yml
@@ -123,6 +123,8 @@ tasks:
         ignore_error: false
       - cmd: ./{{.BINARY}} explain GL044
         ignore_error: false
+      - cmd: ./{{.BINARY}} check testdata/insecure_remote_include.yml
+        ignore_error: true
       - cmd: ./{{.BINARY}} explain
         ignore_error: false
 
@@ -192,6 +194,22 @@ tasks:
     desc: "Preview unreleased changelog entries without writing (requires git-cliff)"
     cmd: git cliff --config cliff.toml --unreleased
 
+  ext-install:
+    desc: Install VS Code extension npm dependencies (run once after checkout)
+    dir: editors/vscode
+    cmd: npm install
+
+  ext-compile:
+    desc: Compile the VS Code extension TypeScript source
+    dir: editors/vscode
+    cmd: npm run compile
+
+  ext-package:
+    desc: Package the VS Code extension into a .vsix file
+    dir: editors/vscode
+    deps: [ext-compile]
+    cmd: npm run package
+
   clean:
     desc: Remove build artifacts
     cmd: rm -f {{.BINARY}} {{.BINARY}}-*.exe {{.BINARY}}-*-linux-amd64

cmd/glint/lsp.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 
+	"git.k3nny.fr/glint/internal/config"
 	"git.k3nny.fr/glint/internal/fetcher"
 	"git.k3nny.fr/glint/internal/lsp"
 )
@@ -15,6 +16,7 @@ func cmdLSP(args []string) {
 	gitlabURL := fs.String("gitlab-url", "", "GitLab instance URL (overrides CI_SERVER_URL / GITLAB_URL)")
 	cacheDir := fs.String("cache-dir", "", "directory for caching fetched remote includes")
 	offline := fs.Bool("offline", false, "skip all network calls; serve only from --cache-dir")
+	proxy := fs.String("proxy", "", "HTTP proxy URL for remote includes and GitLab API calls (e.g. http://proxy:8080); overrides system proxy env vars")
 	fs.Usage = func() {
 		fmt.Fprintf(os.Stderr, "glint %s\n\n", version)
 		fmt.Fprint(os.Stderr, `Start a Language Server Protocol server for .gitlab-ci.yml files.
@@ -42,6 +44,12 @@ Options:
           Do not make any network calls; resolve only local includes.
           Implies --cache-dir default (~/.cache/glint) when not set.
 
+      --proxy <URL>
+          HTTP proxy URL for remote includes and GitLab API calls
+          (e.g. http://proxy:8080). Overrides system proxy env vars
+          (HTTP_PROXY / HTTPS_PROXY). Also configurable via proxy: in
+          .glint.yml.
+
   -h, --help
           Print help
 
@@ -49,19 +57,40 @@ Examples:
   glint lsp
   glint lsp --token glpat-xxxx --cache-dir ~/.cache/glint
   glint lsp --offline
+  glint lsp --proxy http://proxy.example.com:8080
 `)
 	}
 	_ = fs.Parse(args)
 
+	// Load project config from the working directory (the project root from
+	// which the LSP server is launched). CLI flags take priority.
+	wd, _ := os.Getwd()
+	glintCfg, cfgErr := config.Load(wd)
+	if cfgErr != nil {
+		fmt.Fprintf(os.Stderr, "glint lsp: [warning] %s: %v\n", config.Filename, cfgErr)
+	}
+
+	fetcherToken := *token
+	if fetcherToken == "" {
+		fetcherToken = glintCfg.Token
+	}
+	fetcherURL := *gitlabURL
+	if fetcherURL == "" {
+		fetcherURL = glintCfg.URL
+	}
 	resolvedCacheDir := *cacheDir
+	if resolvedCacheDir == "" {
+		resolvedCacheDir = glintCfg.CacheDir
+	}
 	if resolvedCacheDir == "" {
 		resolvedCacheDir = defaultCacheDir()
 	}
-	if *offline && resolvedCacheDir == "" {
-		resolvedCacheDir = defaultCacheDir()
+	resolvedProxy := *proxy
+	if resolvedProxy == "" {
+		resolvedProxy = glintCfg.Proxy
 	}
 
-	cfg := fetcher.AutoConfig().WithOverrides(*gitlabURL, *token, resolvedCacheDir, *offline)
+	cfg := fetcher.AutoConfig().WithOverrides(fetcherURL, fetcherToken, resolvedCacheDir, *offline).WithProxy(resolvedProxy)
 
 	srv := lsp.New(os.Stdin, os.Stdout, cfg, version)
 	if err := srv.Run(); err != nil {

cmd/glint/main.go

@@ -66,7 +66,8 @@ const globalUsage = `glint: Lint and visualise GitLab CI pipelines locally.
 Usage: glint [OPTIONS] <COMMAND>
 
 Commands:
-  check    Lint a pipeline file — exits 0 (clean) or 1 (errors found)
+  check    Lint a pipeline file — exits 0 (clean), 2 (errors), or 10 (warnings only)
+  render   Resolve all includes and extends into a single merged YAML file
   graph    Visualise the pipeline as a job tree or Mermaid graph
   explain  Show description and fix for a lint rule (e.g. glint explain GL007)
   lsp      Start a Language Server Protocol server (stdin/stdout)
@@ -87,6 +88,8 @@ func main() {
 	switch os.Args[1] {
 	case "check":
 		cmdCheck(os.Args[2:])
+	case "render":
+		cmdRender(os.Args[2:])
 	case "graph":
 		cmdGraph(os.Args[2:])
 	case "explain":
@@ -119,7 +122,9 @@ func cmdCheck(args []string) {
 	gitlabURL := fs.String("gitlab-url", "", "GitLab instance URL (overrides CI_SERVER_URL / GITLAB_URL)")
 	cacheDir := fs.String("cache-dir", "", "directory to cache fetched remote includes (created if needed)")
 	offline := fs.Bool("offline", false, "skip all network calls; serve only from --cache-dir")
+	proxy := fs.String("proxy", "", "HTTP proxy URL for remote includes and GitLab API calls (e.g. http://proxy:8080); overrides system proxy env vars")
 	format := fs.String("format", "text", "output format: text, json, sarif, junit, github")
+	noWarn := fs.Bool("no-warn", false, "suppress warning findings; only errors are shown and affect the exit code")
 	branch := fs.String("branch", "", "simulate a branch push (sets CI_COMMIT_BRANCH, …)")
 	tag := fs.String("tag", "", "simulate a tag push (sets CI_COMMIT_TAG, …)")
 	source := fs.String("source", "", "set CI_PIPELINE_SOURCE")
@@ -136,7 +141,11 @@ func cmdCheck(args []string) {
 		fmt.Fprint(os.Stderr, `Lint a GitLab CI pipeline file.
 
 Resolves local includes and extends chains, then runs all lint rules.
-Exits 0 when no errors are found, 1 when at least one error is reported.
+
+Exit codes:
+  0   no findings (clean)
+  2   one or more errors
+  10  one or more warnings, no errors
 
 Usage: glint check [OPTIONS] <PIPELINE>
 
@@ -148,6 +157,10 @@ Options:
           Output format for findings.
           [default: text] [possible values: text, json, sarif, junit, github]
 
+      --no-warn
+          Suppress warning findings. Only errors are printed and counted toward
+          the exit code; warnings are ignored entirely.
+
       --token <TOKEN>
           GitLab personal access token. Required to fetch project: includes;
           component: includes are attempted unauthenticated.
@@ -286,8 +299,12 @@ Examples:
 	if *offline && resolvedCacheDir == "" {
 		resolvedCacheDir = defaultCacheDir()
 	}
+	resolvedProxy := *proxy
+	if resolvedProxy == "" {
+		resolvedProxy = glintCfg.Proxy
+	}
 
-	cfg := fetcher.AutoConfig().WithOverrides(fetcherURL, fetcherToken, resolvedCacheDir, *offline)
+	cfg := fetcher.AutoConfig().WithOverrides(fetcherURL, fetcherToken, resolvedCacheDir, *offline).WithProxy(resolvedProxy)
 
 	p, err := model.Parse(path)
 	if err != nil {
@@ -397,7 +414,19 @@ Examples:
 
 	findings := linter.Lint(p, skipped)
 	findings = applyConfig(findings, glintCfg, p.Suppressions)
-	errCount, _ := countSeverities(findings)
+
+	// --no-warn: discard warnings before any output or exit-code calculation.
+	if *noWarn {
+		kept := findings[:0]
+		for _, f := range findings {
+			if f.Severity != linter.Warning {
+				kept = append(kept, f)
+			}
+		}
+		findings = kept
+	}
+
+	errCount, warnCount := countSeverities(findings)
 
 	// In structured formats the summary line goes to stderr so stdout is clean.
 	summaryOut := os.Stdout
@@ -415,19 +444,27 @@ Examples:
 	case "github":
 		writeGitHub(os.Stdout, findings)
 	default: // "text"
-		for _, f := range findings {
-			fmt.Println(f)
-		}
+		writeTextFindings(os.Stdout, findings)
 	}
 
 	if len(findings) == 0 {
 		fmt.Fprintf(summaryOut, "OK: %s — no issues found (%d job(s), %d stage(s))\n", path, len(p.Jobs), len(p.Stages))
 	} else {
-		fmt.Fprintf(summaryOut, "%d finding(s): %d error(s)\n", len(findings), errCount)
+		switch {
+		case errCount > 0 && warnCount > 0:
+			fmt.Fprintf(summaryOut, "%d finding(s): %d error(s), %d warning(s)\n", len(findings), errCount, warnCount)
+		case errCount > 0:
+			fmt.Fprintf(summaryOut, "%d finding(s): %d error(s)\n", len(findings), errCount)
+		default:
+			fmt.Fprintf(summaryOut, "%d finding(s): %d warning(s)\n", len(findings), warnCount)
+		}
 	}
 
-	if errCount > 0 {
-		exit(1)
+	switch {
+	case errCount > 0:
+		exit(2)
+	case warnCount > 0:
+		exit(10)
 	}
 }
 
@@ -448,6 +485,7 @@ func cmdGraph(args []string) {
 	gitlabURL := fs.String("gitlab-url", "", "GitLab instance URL (overrides CI_SERVER_URL / GITLAB_URL)")
 	cacheDir := fs.String("cache-dir", "", "directory to cache fetched remote includes (created if needed)")
 	offline := fs.Bool("offline", false, "skip all network calls; serve only from --cache-dir")
+	proxy := fs.String("proxy", "", "HTTP proxy URL for remote includes and GitLab API calls (e.g. http://proxy:8080)")
 	out := fs.String("out", "glint-out", "output directory for rendered graph files (pipeline mode)")
 	format := fs.String("format", "svg", "pipeline output format: svg, mermaid, or html")
 	fs.Usage = func() {
@@ -509,6 +547,12 @@ Options:
           Run "git diff --name-only <REF>" to determine changed files for
           rules:changes: evaluation.
 
+      --no-skipped
+          Omit jobs that would be skipped in the given context. Requires at
+          least one context flag (--branch, --tag, --source, --var) or the
+          implicit default context (branch=main). Skipped jobs are removed
+          from the tree, SVG, HTML, and Mermaid output entirely.
+
       --list-vars
           Print all pipeline-level variables collected from the root file and
           every included file (sorted KEY=VALUE) to stderr, then continue
@@ -539,6 +583,7 @@ Examples:
 	branch := fs.String("branch", "", "simulate a branch push (sets CI_COMMIT_BRANCH, …)")
 	tag := fs.String("tag", "", "simulate a tag push (sets CI_COMMIT_TAG, …)")
 	source := fs.String("source", "", "set CI_PIPELINE_SOURCE")
+	noSkipped := fs.Bool("no-skipped", false, "hide jobs that would be skipped in the given context (requires a context)")
 	listVars := fs.Bool("list-vars", false, "print all collected pipeline variables to stderr, then continue")
 	var vars multiFlag
 	fs.Var(&vars, "var", "set a CI variable as KEY=VALUE; repeatable")
@@ -559,13 +604,34 @@ Examples:
 		return
 	}
 	path := fs.Arg(0)
+	rootDir := filepath.Dir(filepath.Clean(path))
 
+	glintCfg, cfgErr := config.Load(rootDir)
+	if cfgErr != nil {
+		fmt.Fprintf(os.Stderr, "%s: [warning] %s: %v\n", path, config.Filename, cfgErr)
+	}
+
+	fetcherToken := *token
+	if fetcherToken == "" {
+		fetcherToken = glintCfg.Token
+	}
+	fetcherURL := *gitlabURL
+	if fetcherURL == "" {
+		fetcherURL = glintCfg.URL
+	}
 	resolvedCacheDir := *cacheDir
+	if resolvedCacheDir == "" {
+		resolvedCacheDir = glintCfg.CacheDir
+	}
 	if *offline && resolvedCacheDir == "" {
 		resolvedCacheDir = defaultCacheDir()
 	}
+	resolvedProxy := *proxy
+	if resolvedProxy == "" {
+		resolvedProxy = glintCfg.Proxy
+	}
 
-	cfg := fetcher.AutoConfig().WithOverrides(*gitlabURL, *token, resolvedCacheDir, *offline)
+	cfg := fetcher.AutoConfig().WithOverrides(fetcherURL, fetcherToken, resolvedCacheDir, *offline).WithProxy(resolvedProxy)
 
 	p, err := model.Parse(path)
 	if err != nil {
@@ -574,7 +640,6 @@ Examples:
 		return
 	}
 
-	rootDir := filepath.Dir(filepath.Clean(path))
 	resolver.ResolveIncludes(p, cfg, rootDir) //nolint:errcheck
 	resolver.Resolve(p)                       //nolint:errcheck
 
@@ -607,6 +672,16 @@ Examples:
 		printVars(p, ctx)
 	}
 
+	// --no-skipped: remove jobs that evaluate to skipped in the current context
+	// before handing the pipeline to any graph function.
+	if *noSkipped && !ctx.IsEmpty() {
+		for name, job := range p.Jobs {
+			if !strings.HasPrefix(name, ".") && cicontext.EvalJob(job, ctx) == cicontext.JobSkipped {
+				delete(p.Jobs, name)
+			}
+		}
+	}
+
 	switch mode {
 	case "default":
 		fmt.Print(graph.Tree(p, ctx))

cmd/glint/main_test.go

@@ -112,7 +112,7 @@ func TestCmdCheck_MissingFile(t *testing.T) {
 	if *code != 2 { t.Errorf("missing file: want exit(2), got %d", *code) }
 }
 
-func TestCmdCheck_WithErrors_ExitsOne(t *testing.T) {
+func TestCmdCheck_WithErrors_ExitsTwo(t *testing.T) {
 	code := captureExit(t)
 	// Pipeline with an error finding (invalid stage reference)
 	content := `
@@ -123,7 +123,7 @@ test-job:
 `
 	path := writePipeline(t, content)
 	cmdCheck([]string{path})
-	if *code != 1 { t.Errorf("pipeline with errors: want exit(1), got %d", *code) }
+	if *code != 2 { t.Errorf("pipeline with errors: want exit(2), got %d", *code) }
 }
 
 func TestCmdCheck_FormatJSON(t *testing.T) {
@@ -703,10 +703,10 @@ func TestCmdCheck_ChangesFrom_Fails(t *testing.T) {
 
 	code := captureExit(t)
 	path := writePipeline(t, minimalPipeline)
-	// Should warn but not crash; pipeline is clean → no exit(1).
+	// Should warn but not crash; pipeline is clean → no exit(2).
 	cmdCheck([]string{"--changes-from", "origin/main", path})
-	if *code == 1 {
-		t.Errorf("expected no exit(1) when --changes-from fails gracefully, got %d", *code)
+	if *code == 2 {
+		t.Errorf("expected no exit(2) when --changes-from fails gracefully, got %d", *code)
 	}
 }
 
@@ -753,10 +753,10 @@ build-job:
 `
 	path := writePipeline(t, content)
 	// build-job's rule fires only if src/** matches; with 0 changed files it is skipped.
-	// Pipeline is clean (no lint errors) → no exit(1).
+	// Pipeline is clean (no lint errors) → no exit(2).
 	cmdCheck([]string{"--changes-from", "origin/main", path})
-	if *code == 1 {
-		t.Errorf("unexpected exit(1): %d", *code)
+	if *code == 2 {
+		t.Errorf("unexpected exit(2): %d", *code)
 	}
 }
 
@@ -770,8 +770,8 @@ func TestCmdGraph_ChangesFrom_Fails(t *testing.T) {
 	code := captureExit(t)
 	path := writePipeline(t, minimalPipeline)
 	cmdGraph([]string{"tree", "--changes-from", "origin/main", path})
-	if *code == 1 {
-		t.Errorf("unexpected exit(1) when --changes-from fails in graph mode")
+	if *code == 2 {
+		t.Errorf("unexpected exit(2) when --changes-from fails in graph mode")
 	}
 }
 
@@ -785,8 +785,8 @@ func TestCmdGraph_ChangesFrom_Success(t *testing.T) {
 	code := captureExit(t)
 	path := writePipeline(t, minimalPipeline)
 	cmdGraph([]string{"tree", "--changes-from", "origin/main", path})
-	if *code == 1 {
-		t.Errorf("unexpected exit(1) in graph --changes-from success path")
+	if *code == 2 {
+		t.Errorf("unexpected exit(2) in graph --changes-from success path")
 	}
 }
 
@@ -801,8 +801,8 @@ func TestCmdGraph_ChangesFrom_EmptyDiff(t *testing.T) {
 	path := writePipeline(t, minimalPipeline)
 	// reliable=true, allChanged nil → allChanged = []string{} branch hit
 	cmdGraph([]string{"tree", "--changes-from", "origin/main", path})
-	if *code == 1 {
-		t.Errorf("unexpected exit(1) in graph --changes-from empty diff")
+	if *code == 2 {
+		t.Errorf("unexpected exit(2) in graph --changes-from empty diff")
 	}
 }
 
@@ -818,8 +818,8 @@ build-job:
 `
 	path := writePipeline(t, content)
 	cmdGraph([]string{"tree", "--changes", "src/app.go", path})
-	if *code == 1 {
-		t.Errorf("unexpected exit(1) with valid pipeline and --changes flag")
+	if *code == 2 {
+		t.Errorf("unexpected exit(2) with valid pipeline and --changes flag")
 	}
 }
 
@@ -848,7 +848,7 @@ deploy-job:
 	// by rules evaluation → needs cross-check suppressed → exit 0.
 	code := captureExit(t)
 	cmdCheck([]string{"--branch", "main", path})
-	if *code == 1 {
+	if *code == 2 {
 		t.Error("skipped job's needs: error should be suppressed in context-scoped lint")
 	}
 }
@@ -873,8 +873,8 @@ deploy-job:
 
 	code := captureExit(t)
 	cmdCheck([]string{"--tag", "v1.0.0", path})
-	if *code != 1 {
-		t.Error("active job's bad needs: should still produce GL027 error")
+	if *code != 2 {
+		t.Error("active job's bad needs: should still produce GL027 error (exit 2)")
 	}
 }
 
@@ -883,7 +883,7 @@ func TestCmdCheck_ContextScopedLinting_SkippedSet_IsNilWhenAllActive(t *testing.
 	code := captureExit(t)
 	path := writePipeline(t, minimalPipeline)
 	cmdCheck([]string{"--branch", "main", path})
-	if *code == 1 {
+	if *code == 2 {
 		t.Error("valid pipeline with all-active jobs should not produce errors")
 	}
 }
@@ -1142,8 +1142,8 @@ test-job:
 `
 	path := writePipeline(t, content)
 	cmdCheck([]string{"--context", "branch=main", path})
-	if *code != 1 {
-		t.Errorf("multi-context error pipeline: want exit(1), got %d", *code)
+	if *code != 2 {
+		t.Errorf("multi-context error pipeline: want exit(2), got %d", *code)
 	}
 }
 

cmd/glint/output.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"git.k3nny.fr/glint/internal/linter"
+)
+
+// ANSI escape sequences used for colorized output.
+const (
+	ansiReset  = "\033[0m"
+	ansiBold   = "\033[1m"
+	ansiDim    = "\033[2m"
+	ansiRed    = "\033[31m"
+	ansiOrange = "\033[33m" // rendered as orange/amber in most terminals
+)
+
+// colorEnabled reports whether ANSI color should be used when writing to w.
+// Colors are suppressed when NO_COLOR is set or when w is not a terminal.
+func colorEnabled(w io.Writer) bool {
+	if os.Getenv("NO_COLOR") != "" {
+		return false
+	}
+	f, ok := w.(*os.File)
+	if !ok {
+		return false
+	}
+	fi, err := f.Stat()
+	return err == nil && (fi.Mode()&os.ModeCharDevice) != 0
+}
+
+// writeTextFindings prints findings in a columnized format with optional
+// ANSI color. All findings are scanned first to compute column widths so
+// that each field aligns across all output lines.
+//
+// Output columns (space-separated, no borders):
+//
+//	location   RULE   severity   message
+func writeTextFindings(w io.Writer, findings []linter.Finding) {
+	if len(findings) == 0 {
+		return
+	}
+
+	color := colorEnabled(w)
+
+	// Pre-compute locations and maximum location width.
+	locs := make([]string, len(findings))
+	maxLoc := 0
+	for i, f := range findings {
+		locs[i] = findingLocation(f)
+		if len(locs[i]) > maxLoc {
+			maxLoc = len(locs[i])
+		}
+	}
+
+	// Rule IDs are always 5 chars (GL001–GL999).
+	const ruleWidth = 5
+	// Severity width: "warning" = 7 chars.
+	const sevWidth = 7
+
+	for i, f := range findings {
+		loc := locs[i]
+		rule := f.Rule
+		sev := strings.ToLower(string(f.Severity))
+
+		msg := f.Message
+		if f.Job != "" {
+			msg = fmt.Sprintf("job %q: %s", f.Job, msg)
+		}
+
+		if color {
+			var sevSeq string
+			if f.Severity == linter.Error {
+				sevSeq = ansiRed + ansiBold
+			} else {
+				sevSeq = ansiOrange + ansiBold
+			}
+			fmt.Fprintf(w, "%s%-*s%s  %s%-*s%s  %s%-*s%s  %s\n",
+				ansiDim, maxLoc, loc, ansiReset,
+				ansiBold, ruleWidth, rule, ansiReset,
+				sevSeq, sevWidth, sev, ansiReset,
+				msg,
+			)
+		} else {
+			fmt.Fprintf(w, "%-*s  %-*s  %-*s  %s\n",
+				maxLoc, loc,
+				ruleWidth, rule,
+				sevWidth, sev,
+				msg,
+			)
+		}
+	}
+}
+
+// findingLocation formats the file:line:col location string for a finding.
+func findingLocation(f linter.Finding) string {
+	if f.File == "" {
+		return ""
+	}
+	switch {
+	case f.Line > 0 && f.Column > 0:
+		return fmt.Sprintf("%s:%d:%d", f.File, f.Line, f.Column)
+	case f.Line > 0:
+		return fmt.Sprintf("%s:%d", f.File, f.Line)
+	default:
+		return f.File
+	}
+}

cmd/glint/render.go

@@ -0,0 +1,269 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"git.k3nny.fr/glint/internal/config"
+	"git.k3nny.fr/glint/internal/fetcher"
+	"git.k3nny.fr/glint/internal/model"
+	"git.k3nny.fr/glint/internal/resolver"
+	"gopkg.in/yaml.v3"
+)
+
+func cmdRender(args []string) {
+	fs := flag.NewFlagSet("glint render", flag.ExitOnError)
+	output := fs.String("output", "", "output file path (default: rendered.gitlab-ci.yml; use - for stdout)")
+	token := fs.String("token", "", "GitLab personal access token (overrides GITLAB_TOKEN)")
+	gitlabURL := fs.String("gitlab-url", "", "GitLab instance URL (overrides CI_SERVER_URL / GITLAB_URL)")
+	cacheDir := fs.String("cache-dir", "", "directory to cache fetched remote includes")
+	offline := fs.Bool("offline", false, "skip all network calls; serve only from --cache-dir")
+	proxy := fs.String("proxy", "", "HTTP proxy URL for remote includes (e.g. http://proxy:8080)")
+	fs.Usage = func() {
+		fmt.Fprintf(os.Stderr, "glint %s\n\n", version)
+		fmt.Fprint(os.Stderr, `Resolve all includes and extends into a single merged YAML file.
+
+Performs the same include resolution and extends merging that GitLab CI
+does server-side, then writes the fully flattened pipeline to a single file.
+Useful for inspecting the resolved pipeline or running further local tooling.
+
+The output file strips 'include:' (consumed by resolution) and 'extends:'
+(applied to each job) keys. All other fields are preserved verbatim.
+Template jobs (names starting with '.') are retained.
+
+Usage: glint render [OPTIONS] <PIPELINE>
+
+Arguments:
+  <PIPELINE>  Path to the .gitlab-ci.yml file to resolve
+
+Options:
+      --output <FILE>
+          Write the rendered pipeline to FILE.
+          Use '-' to write to stdout.
+          [default: rendered.gitlab-ci.yml]
+
+      --token <TOKEN>
+          GitLab personal access token for fetching project: and component:
+          includes.
+          [env: GITLAB_TOKEN | CI_JOB_TOKEN | GITLAB_PRIVATE_TOKEN]
+
+      --gitlab-url <URL>
+          GitLab instance URL.
+          [env: CI_SERVER_URL | GITLAB_URL] [default: https://gitlab.com]
+
+      --cache-dir <DIR>
+          Cache directory for fetched remote includes.
+
+      --offline
+          Do not make any network calls; use cache only.
+
+      --proxy <URL>
+          HTTP proxy URL for remote includes and GitLab API calls.
+
+  -h, --help
+          Print help
+
+Examples:
+  glint render .gitlab-ci.yml
+  glint render --output merged.yml .gitlab-ci.yml
+  glint render --output - .gitlab-ci.yml | yq .
+  glint render --offline --cache-dir ~/.cache/glint .gitlab-ci.yml
+`)
+	}
+	_ = fs.Parse(args)
+
+	if fs.NArg() != 1 {
+		fs.Usage()
+		exit(2)
+		return
+	}
+	path := fs.Arg(0)
+	rootDir := filepath.Dir(filepath.Clean(path))
+
+	glintCfg, cfgErr := config.Load(rootDir)
+	if cfgErr != nil {
+		fmt.Fprintf(os.Stderr, "%s: [warning] %s: %v\n", path, config.Filename, cfgErr)
+	}
+
+	fetcherToken := *token
+	if fetcherToken == "" {
+		fetcherToken = glintCfg.Token
+	}
+	fetcherURL := *gitlabURL
+	if fetcherURL == "" {
+		fetcherURL = glintCfg.URL
+	}
+	resolvedCacheDir := *cacheDir
+	if resolvedCacheDir == "" {
+		resolvedCacheDir = glintCfg.CacheDir
+	}
+	if *offline && resolvedCacheDir == "" {
+		resolvedCacheDir = defaultCacheDir()
+	}
+	resolvedProxy := *proxy
+	if resolvedProxy == "" {
+		resolvedProxy = glintCfg.Proxy
+	}
+
+	cfg := fetcher.AutoConfig().WithOverrides(fetcherURL, fetcherToken, resolvedCacheDir, *offline).WithProxy(resolvedProxy)
+
+	p, err := model.Parse(path)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		exit(2)
+		return
+	}
+
+	warnings, _ := resolver.ResolveIncludes(p, cfg, rootDir)
+	for _, w := range warnings {
+		fmt.Fprintf(os.Stderr, "%s: [warning] include %s\n", path, w)
+	}
+
+	extWarnings, err := resolver.Resolve(p)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: resolving extends: %v\n", err)
+		exit(2)
+		return
+	}
+	for _, w := range extWarnings {
+		fmt.Fprintf(os.Stderr, "%s: [warning] job %q extends unknown job %q; extends chain skipped\n", path, w.Job, w.Base)
+	}
+
+	doc, err := buildRenderDoc(p)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: building output: %v\n", err)
+		exit(2)
+		return
+	}
+
+	outPath := *output
+	if outPath == "" {
+		outPath = "rendered.gitlab-ci.yml"
+	}
+
+	var w interface{ Write([]byte) (int, error) }
+	if outPath == "-" {
+		w = os.Stdout
+	} else {
+		f, err := os.Create(outPath)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "error: creating output file: %v\n", err)
+			exit(2)
+			return
+		}
+		defer f.Close()
+		w = f
+	}
+
+	enc := yaml.NewEncoder(w)
+	enc.SetIndent(2)
+	if err := enc.Encode(doc); err != nil {
+		fmt.Fprintf(os.Stderr, "error: writing output: %v\n", err)
+		exit(2)
+		return
+	}
+	_ = enc.Close()
+
+	if outPath != "-" {
+		jobCount := 0
+		for name := range p.Jobs {
+			if !strings.HasPrefix(name, ".") {
+				jobCount++
+			}
+		}
+		fmt.Fprintf(os.Stderr, "rendered: %s (%d job(s), %d stage(s))\n", outPath, jobCount, len(p.Stages))
+	}
+}
+
+// buildRenderDoc constructs an ordered yaml.Node document from the resolved
+// pipeline. Pipeline-level keys (stages, variables, default, workflow) come
+// first, followed by template jobs (.name) then regular jobs, both sorted
+// alphabetically. 'include:' and 'extends:' are omitted — they have been
+// consumed by the resolution passes.
+func buildRenderDoc(p *model.Pipeline) (*yaml.Node, error) {
+	root := &yaml.Node{Kind: yaml.MappingNode, Tag: "!!map"}
+
+	addField := func(key string, val any) error {
+		n, err := anyToNode(val)
+		if err != nil {
+			return fmt.Errorf("encoding %q: %w", key, err)
+		}
+		root.Content = append(root.Content,
+			&yaml.Node{Kind: yaml.ScalarNode, Tag: "!!str", Value: key},
+			n,
+		)
+		return nil
+	}
+
+	if len(p.Stages) > 0 {
+		if err := addField("stages", p.Stages); err != nil {
+			return nil, err
+		}
+	}
+	if len(p.Variables) > 0 {
+		if err := addField("variables", p.Variables); err != nil {
+			return nil, err
+		}
+	}
+	if p.Default != nil {
+		if err := addField("default", p.Default); err != nil {
+			return nil, err
+		}
+	}
+	if p.Workflow != nil {
+		if err := addField("workflow", p.Workflow); err != nil {
+			return nil, err
+		}
+	}
+
+	// Collect and sort job names: template jobs first, then regular jobs.
+	var templates, regular []string
+	for name := range p.RawJobs {
+		if strings.HasPrefix(name, ".") {
+			templates = append(templates, name)
+		} else {
+			regular = append(regular, name)
+		}
+	}
+	sort.Strings(templates)
+	sort.Strings(regular)
+
+	for _, name := range append(templates, regular...) {
+		raw := p.RawJobs[name]
+		// Copy to avoid mutating the shared map; strip resolution-consumed keys.
+		cleaned := make(map[string]any, len(raw))
+		for k, v := range raw {
+			if k == "extends" {
+				continue
+			}
+			cleaned[k] = v
+		}
+		if err := addField(name, cleaned); err != nil {
+			return nil, err
+		}
+	}
+
+	doc := &yaml.Node{Kind: yaml.DocumentNode, Content: []*yaml.Node{root}}
+	return doc, nil
+}
+
+// anyToNode converts an arbitrary Go value to a *yaml.Node by round-tripping
+// through yaml.Marshal / yaml.Unmarshal, which preserves all value types.
+func anyToNode(v any) (*yaml.Node, error) {
+	data, err := yaml.Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+	var doc yaml.Node
+	if err := yaml.Unmarshal(data, &doc); err != nil {
+		return nil, err
+	}
+	if doc.Kind == yaml.DocumentNode && len(doc.Content) > 0 {
+		return doc.Content[0], nil
+	}
+	return &doc, nil
+}

editors/vscode/.gitignore

@@ -0,0 +1,3 @@
+node_modules/
+out/
+*.vsix

editors/vscode/.vscodeignore

@@ -0,0 +1,8 @@
+src/**
+tsconfig.json
+.gitignore
+node_modules/**
+!node_modules/vscode-languageclient/**
+!node_modules/vscode-languageserver-protocol/**
+!node_modules/vscode-languageserver-types/**
+!node_modules/vscode-jsonrpc/**

editors/vscode/package.json

@@ -0,0 +1,56 @@
+{
+  "name": "glint",
+  "displayName": "glint — GitLab CI Linter",
+  "description": "Inline diagnostics for .gitlab-ci.yml pipelines powered by the glint language server",
+  "version": "0.2.29",
+  "publisher": "k3nny",
+  "license": "Apache-2.0",
+  "repository": {
+    "type": "git",
+    "url": "https://git.k3nny.fr/k3nny/glint"
+  },
+  "engines": {
+    "vscode": "^1.82.0"
+  },
+  "categories": [
+    "Linters"
+  ],
+  "keywords": [
+    "gitlab",
+    "ci",
+    "yaml",
+    "lint",
+    "pipeline"
+  ],
+  "activationEvents": [
+    "onLanguage:yaml"
+  ],
+  "main": "./out/extension.js",
+  "contributes": {
+    "configuration": {
+      "type": "object",
+      "title": "glint",
+      "properties": {
+        "glint.executablePath": {
+          "type": "string",
+          "default": "glint",
+          "markdownDescription": "Path to the `glint` binary. Leave as `glint` if it is on your `PATH`, or set an absolute path (e.g. `/usr/local/bin/glint`)."
+        }
+      }
+    }
+  },
+  "scripts": {
+    "compile": "tsc -p ./",
+    "watch": "tsc --watch -p ./",
+    "package": "vsce package"
+  },
+  "dependencies": {
+    "vscode-languageclient": "^9.0.1"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/vscode": "^1.82.0",
+    "@vscode/vsce": "^2.22.0",
+    "typescript": "^5.3.0"
+  }
+}

editors/vscode/src/extension.ts

@@ -0,0 +1,41 @@
+import * as vscode from 'vscode';
+import {
+  LanguageClient,
+  LanguageClientOptions,
+  ServerOptions,
+  TransportKind,
+} from 'vscode-languageclient/node';
+
+let client: LanguageClient | undefined;
+
+export function activate(context: vscode.ExtensionContext): void {
+  const cfg = vscode.workspace.getConfiguration('glint');
+  const glintPath = cfg.get<string>('executablePath') || 'glint';
+
+  const serverOptions: ServerOptions = {
+    command: glintPath,
+    args: ['lsp'],
+    transport: TransportKind.stdio,
+  };
+
+  const clientOptions: LanguageClientOptions = {
+    // Only process .gitlab-ci.yml files, not all YAML.
+    documentSelector: [
+      { scheme: 'file', language: 'yaml', pattern: '**/.gitlab-ci.yml' },
+    ],
+  };
+
+  client = new LanguageClient(
+    'glint',
+    'glint — GitLab CI Linter',
+    serverOptions,
+    clientOptions,
+  );
+
+  client.start();
+  context.subscriptions.push(client);
+}
+
+export async function deactivate(): Promise<void> {
+  await client?.stop();
+}

editors/vscode/tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "ES2020",
+    "lib": ["ES2020"],
+    "outDir": "out",
+    "rootDir": "src",
+    "strict": true,
+    "sourceMap": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "out"]
+}

internal/config/config.go

@@ -38,6 +38,12 @@ type Config struct {
 	// CacheDir is the default directory for caching fetched remote includes.
 	// Overridden by the --cache-dir flag.
 	CacheDir string `yaml:"cache_dir"`
+
+	// Proxy is the HTTP proxy URL for fetching remote includes and GitLab API
+	// calls (e.g. "http://proxy.example.com:8080"). Overridden by the --proxy
+	// flag. When empty, system proxy settings (HTTP_PROXY / HTTPS_PROXY /
+	// NO_PROXY env vars) are used automatically.
+	Proxy string `yaml:"proxy"`
 }
 
 // Load searches for a .glint.yml file starting from dir and walking up toward

internal/fetcher/cache.go

@@ -26,10 +26,10 @@ func cacheWrite(dir, key string, data []byte) {
 	if dir == "" {
 		return
 	}
-	if err := os.MkdirAll(dir, 0o755); err != nil {
+	if err := os.MkdirAll(dir, 0o700); err != nil {
 		return
 	}
-	_ = os.WriteFile(cachePath(dir, key), data, 0o644)
+	_ = os.WriteFile(cachePath(dir, key), data, 0o600)
 }
 
 // cachePath returns the filesystem path for a cache entry.

internal/fetcher/cache_test.go

@@ -71,3 +71,28 @@ func TestCacheWrite_MkdirAll(t *testing.T) {
 		t.Errorf("directory not created: %v", err)
 	}
 }
+
+func TestCacheWrite_FilePermissions(t *testing.T) {
+	dir := t.TempDir()
+	cacheWrite(dir, "seckey", []byte("secret"))
+	info, err := os.Stat(cachePath(dir, "seckey"))
+	if err != nil {
+		t.Fatalf("stat cache file: %v", err)
+	}
+	if mode := info.Mode().Perm(); mode != 0o600 {
+		t.Errorf("cache file mode = %04o; want 0600", mode)
+	}
+}
+
+func TestCacheWrite_DirPermissions(t *testing.T) {
+	parent := t.TempDir()
+	dir := filepath.Join(parent, "glint-cache")
+	cacheWrite(dir, "k", []byte("v"))
+	info, err := os.Stat(dir)
+	if err != nil {
+		t.Fatalf("stat cache dir: %v", err)
+	}
+	if mode := info.Mode().Perm(); mode != 0o700 {
+		t.Errorf("cache dir mode = %04o; want 0700", mode)
+	}
+}

internal/fetcher/gitlab.go

@@ -8,8 +8,18 @@ import (
 	"net/url"
 	"os"
 	"strings"
+	"time"
 )
 
+// httpClient is the shared HTTP client for all fetcher requests.
+// Timeout guards against hung remote servers. Transport is intentionally nil
+// so http.DefaultTransport is used dynamically — allowing tests to swap it.
+var httpClient = &http.Client{Timeout: 30 * time.Second}
+
+// maxResponseBytes is the per-response size cap. Responses larger than this
+// are rejected to prevent memory exhaustion from pathological servers.
+const maxResponseBytes int64 = 10 << 20 // 10 MiB
+
 // TokenSource describes where a token was found, which determines the correct
 // authentication header to use with the GitLab API.
 type TokenSource int
@@ -27,6 +37,10 @@ type GitLabConfig struct {
 	Source   TokenSource
 	CacheDir string // local cache directory; empty = caching disabled
 	Offline  bool   // when true, return an error instead of making network calls
+	// ProxyURL overrides the HTTP proxy for all requests made with this config.
+	// Empty string means use system proxy settings (HTTP_PROXY / HTTPS_PROXY /
+	// NO_PROXY env vars honoured automatically by http.DefaultTransport).
+	ProxyURL string
 }
 
 // AutoConfig builds a GitLabConfig from environment variables.
@@ -56,6 +70,33 @@ func AutoConfig() GitLabConfig {
 	return cfg
 }
 
+// WithProxy returns a copy of cfg with ProxyURL set.
+func (cfg GitLabConfig) WithProxy(proxyURL string) GitLabConfig {
+	cfg.ProxyURL = proxyURL
+	return cfg
+}
+
+// client returns an HTTP client for this config.
+// When ProxyURL is set it takes precedence over system proxy env vars;
+// otherwise http.DefaultTransport's built-in ProxyFromEnvironment is used.
+func (cfg GitLabConfig) client() *http.Client {
+	if cfg.ProxyURL == "" {
+		return httpClient
+	}
+	proxyURL, err := url.Parse(cfg.ProxyURL)
+	if err != nil {
+		return httpClient
+	}
+	// Clone the default transport so all TLS/dial settings are preserved.
+	t, ok := http.DefaultTransport.(*http.Transport)
+	if !ok {
+		return httpClient
+	}
+	transport := t.Clone()
+	transport.Proxy = http.ProxyURL(proxyURL)
+	return &http.Client{Timeout: httpClient.Timeout, Transport: transport}
+}
+
 // WithOverrides returns a copy of cfg with the provided overrides applied.
 // Non-empty strings overwrite the corresponding field; booleans are always
 // applied (so offline: false explicitly clears offline mode).
@@ -128,16 +169,19 @@ func (cfg GitLabConfig) FetchFile(project, filePath, ref string) ([]byte, error)
 		}
 	}
 
-	resp, err := http.DefaultClient.Do(req)
+	resp, err := cfg.client().Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("GET %s: %w", apiURL, err)
 	}
 	defer resp.Body.Close()
 
-	body, err := io.ReadAll(resp.Body)
+	body, err := io.ReadAll(io.LimitReader(resp.Body, maxResponseBytes+1))
 	if err != nil {
 		return nil, fmt.Errorf("reading response body: %w", err)
 	}
+	if int64(len(body)) > maxResponseBytes {
+		return nil, fmt.Errorf("response body exceeds maximum size (%d MiB)", maxResponseBytes>>20)
+	}
 
 	if resp.StatusCode != http.StatusOK {
 		msg := strings.TrimSpace(string(body))
@@ -169,15 +213,18 @@ func (cfg GitLabConfig) FetchURL(rawURL string) ([]byte, error) {
 		return nil, fmt.Errorf("offline mode: %s is not in the local cache (run without --offline first to populate the cache)", rawURL)
 	}
 
-	resp, err := http.Get(rawURL) //nolint:noctx
+	resp, err := cfg.client().Get(rawURL)
 	if err != nil {
 		return nil, fmt.Errorf("GET %s: %w", rawURL, err)
 	}
 	defer resp.Body.Close()
-	body, err := io.ReadAll(resp.Body)
+	body, err := io.ReadAll(io.LimitReader(resp.Body, maxResponseBytes+1))
 	if err != nil {
 		return nil, fmt.Errorf("reading body: %w", err)
 	}
+	if int64(len(body)) > maxResponseBytes {
+		return nil, fmt.Errorf("response body exceeds maximum size (%d MiB)", maxResponseBytes>>20)
+	}
 	if resp.StatusCode != http.StatusOK {
 		return nil, fmt.Errorf("GET %s: status %d", rawURL, resp.StatusCode)
 	}

internal/fetcher/gitlab_test.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"os"
+	"strings"
 	"testing"
 )
 
@@ -339,3 +340,46 @@ func TestFetchURL_NotOK(t *testing.T) {
 	_, err := cfg.FetchURL(srv.URL)
 	if err == nil { t.Fatal("expected error for non-200 status") }
 }
+
+func TestFetchFile_ResponseTooLarge(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		// Write maxResponseBytes+1 bytes to exceed the cap.
+		chunk := make([]byte, 4096)
+		written := int64(0)
+		for written <= maxResponseBytes {
+			n, _ := w.Write(chunk)
+			written += int64(n)
+		}
+	}))
+	defer srv.Close()
+	cfg := GitLabConfig{BaseURL: srv.URL}
+	_, err := cfg.FetchFile("group/project", "/ci.yml", "main")
+	if err == nil {
+		t.Fatal("expected error for oversized response")
+	}
+	if !strings.Contains(err.Error(), "exceeds maximum size") {
+		t.Errorf("unexpected error: %v", err)
+	}
+}
+
+func TestFetchURL_ResponseTooLarge(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		chunk := make([]byte, 4096)
+		written := int64(0)
+		for written <= maxResponseBytes {
+			n, _ := w.Write(chunk)
+			written += int64(n)
+		}
+	}))
+	defer srv.Close()
+	cfg := GitLabConfig{}
+	_, err := cfg.FetchURL(srv.URL)
+	if err == nil {
+		t.Fatal("expected error for oversized response")
+	}
+	if !strings.Contains(err.Error(), "exceeds maximum size") {
+		t.Errorf("unexpected error: %v", err)
+	}
+}

internal/linter/dependencies.go

@@ -30,6 +30,7 @@ func checkDependencies(p *model.Pipeline, skipped map[string]bool) []Finding {
 					Job:      name,
 					File:     job.File,
 					Line:     job.Line,
+					Column:   job.Column,
 					Message:  fmt.Sprintf("'dependencies' references unknown job %q", dep),
 				})
 				continue
@@ -43,6 +44,7 @@ func checkDependencies(p *model.Pipeline, skipped map[string]bool) []Finding {
 						Job:      name,
 						File:     job.File,
 						Line:     job.Line,
+						Column:   job.Column,
 						Message:  fmt.Sprintf("'dependencies' job %q must be in an earlier stage (in %q, current job is in %q)", dep, depJob.Stage, job.Stage),
 					})
 				}

internal/linter/explain.go

@@ -853,4 +853,18 @@ test:
     - if: $CI_COMMIT_BRANCH == "main"
       needs: [build, lint]`,
 	},
+
+	RuleInsecureRemoteInclude: {
+		Title:    "remote include uses plain HTTP",
+		Severity: Warning,
+		Description: "An include: remote: entry uses an http:// URL instead of https://. " +
+			"CI templates fetched over plain HTTP are transmitted in cleartext; an " +
+			"attacker with network access could intercept or modify the template " +
+			"before it is parsed. Use https:// so the connection is encrypted and " +
+			"the server's identity is verified.",
+		Example: `include:
+  - remote: http://ci-templates.example.com/build.yml`,
+		Fix: `include:
+  - remote: https://ci-templates.example.com/build.yml`,
+	},
 }

internal/linter/if_reachability.go

@@ -99,6 +99,7 @@ func evalRulesReachability(name string, job model.Job, jobVars map[string]string
 		Job:      name,
 		File:     job.File,
 		Line:     job.Line,
+		Column:   job.Column,
 		Message:  "rules: block can never activate: all if: conditions evaluate to false given the declared pipeline variables",
 	}
 }

internal/linter/includes.go

@@ -0,0 +1,31 @@
+package linter
+
+import (
+	"fmt"
+	"strings"
+
+	"git.k3nny.fr/glint/internal/model"
+)
+
+// checkInsecureRemoteInclude warns when an include: remote: entry uses plain
+// HTTP (GL045). The file is still fetched and linted; the finding is a warning
+// so pipelines that use HTTP for internal infra are not blocked.
+func checkInsecureRemoteInclude(p *model.Pipeline) []Finding {
+	var findings []Finding
+	for _, inc := range p.Include {
+		m, ok := inc.(map[string]any)
+		if !ok {
+			continue
+		}
+		remote, _ := m["remote"].(string)
+		if strings.HasPrefix(remote, "http://") {
+			findings = append(findings, Finding{
+				Severity: Warning,
+				Rule:     RuleInsecureRemoteInclude,
+				File:     p.SourceFile,
+				Message:  fmt.Sprintf("remote include %q uses plain HTTP; CI templates are fetched unencrypted — prefer HTTPS", remote),
+			})
+		}
+	}
+	return findings
+}

internal/linter/includes_test.go

@@ -0,0 +1,73 @@
+package linter
+
+import (
+	"testing"
+
+	"git.k3nny.fr/glint/internal/model"
+)
+
+func TestCheckInsecureRemoteInclude(t *testing.T) {
+	tests := []struct {
+		name    string
+		include []any
+		wantGL  string // expected rule ID, empty = no findings
+	}{
+		{
+			name:    "http URL triggers GL045",
+			include: []any{map[string]any{"remote": "http://example.com/ci.yml"}},
+			wantGL:  RuleInsecureRemoteInclude,
+		},
+		{
+			name:    "https URL is clean",
+			include: []any{map[string]any{"remote": "https://example.com/ci.yml"}},
+		},
+		{
+			name:    "local include ignored",
+			include: []any{map[string]any{"local": "/templates/ci.yml"}},
+		},
+		{
+			name:    "string include ignored",
+			include: []any{"/templates/ci.yml"},
+		},
+		{
+			name:    "no includes",
+			include: nil,
+		},
+		{
+			name: "mixed: http fires, https does not",
+			include: []any{
+				map[string]any{"remote": "https://ok.example.com/ci.yml"},
+				map[string]any{"remote": "http://bad.example.com/ci.yml"},
+			},
+			wantGL: RuleInsecureRemoteInclude,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			p := &model.Pipeline{
+				Include: tc.include,
+				Jobs:    map[string]model.Job{},
+			}
+			findings := checkInsecureRemoteInclude(p)
+			if tc.wantGL == "" {
+				if len(findings) != 0 {
+					t.Errorf("expected no findings, got: %v", findings)
+				}
+				return
+			}
+			found := false
+			for _, f := range findings {
+				if f.Rule == tc.wantGL {
+					found = true
+					if f.Severity != Warning {
+						t.Errorf("severity = %v; want Warning", f.Severity)
+					}
+				}
+			}
+			if !found {
+				t.Errorf("expected finding %s, got: %v", tc.wantGL, findings)
+			}
+		})
+	}
+}

internal/linter/inherit_completeness.go

@@ -40,6 +40,7 @@ func checkJobInheritCompleteness(p *model.Pipeline, name string, job model.Job)
 			Job:      name,
 			File:     job.File,
 			Line:     job.Line,
+			Column:   job.Column,
 			Message:  "'inherit: default:' is declared but the pipeline has no 'default:' block — declaration has no effect",
 		}}
 	}
@@ -70,6 +71,7 @@ func checkJobInheritCompleteness(p *model.Pipeline, name string, job model.Job)
 		Job:      name,
 		File:     job.File,
 		Line:     job.Line,
+		Column:   job.Column,
 		Message: fmt.Sprintf(
 			"'inherit: default: [%s]': %s not defined in the 'default:' block — %s",
 			strings.Join(dead, ", "),

internal/linter/linter.go

@@ -22,15 +22,19 @@ type Finding struct {
 	Job      string // empty for pipeline-level findings
 	File     string // source file where the finding originates
 	Line     int    // line number in File (0 = unknown)
+	Column   int    // column number in File (0 = unknown; 1-indexed)
 	Message  string
 }
 
 func (f Finding) String() string {
 	var loc string
 	if f.File != "" {
-		if f.Line > 0 {
+		switch {
+		case f.Line > 0 && f.Column > 0:
+			loc = fmt.Sprintf("%s:%d:%d: ", f.File, f.Line, f.Column)
+		case f.Line > 0:
 			loc = fmt.Sprintf("%s:%d: ", f.File, f.Line)
-		} else {
+		default:
 			loc = fmt.Sprintf("%s: ", f.File)
 		}
 	}
@@ -67,6 +71,7 @@ func Lint(p *model.Pipeline, skipped map[string]bool) []Finding {
 	findings = append(findings, checkVariableRefs(p)...)
 	findings = append(findings, checkRulesIfReachability(p)...)
 	findings = append(findings, checkInheritCompleteness(p)...)
+	findings = append(findings, checkInsecureRemoteInclude(p)...)
 	slices.SortStableFunc(findings, func(a, b Finding) int {
 		if c := cmp.Compare(a.File, b.File); c != 0 {
 			return c
@@ -224,6 +229,7 @@ func checkJob(name string, job model.Job, stageSet map[string]bool) []Finding {
 		if findings[i].Job != "" && findings[i].File == "" {
 			findings[i].File = job.File
 			findings[i].Line = job.Line
+			findings[i].Column = job.Column
 		}
 	}
 	return findings

internal/linter/needs.go

@@ -53,6 +53,7 @@ func checkNeeds(p *model.Pipeline, skipped map[string]bool) []Finding {
 					Job:      name,
 					File:     job.File,
 					Line:     job.Line,
+					Column:   job.Column,
 					Message:  fmt.Sprintf("needs unknown job %q", entry.job),
 				})
 				continue
@@ -71,6 +72,7 @@ func checkNeeds(p *model.Pipeline, skipped map[string]bool) []Finding {
 						Job:      name,
 						File:     job.File,
 						Line:     job.Line,
+						Column:   job.Column,
 						Message: fmt.Sprintf(
 							"needs %q which is in a later stage (%q after %q)",
 							entry.job, neededJob.Stage, job.Stage,
@@ -111,6 +113,7 @@ func checkRulesNeeds(p *model.Pipeline, skipped map[string]bool) []Finding {
 						Job:      name,
 						File:     job.File,
 						Line:     job.Line,
+						Column:   job.Column,
 						Message: fmt.Sprintf(
 							"rules[%d].needs: references unknown job %q",
 							i, entry.job,
@@ -171,6 +174,7 @@ func detectNeedsCycles(graph map[string][]string, jobs map[string]model.Job) []F
 					Job:      name,
 					File:     j.File,
 					Line:     j.Line,
+					Column:   j.Column,
 					Message:  fmt.Sprintf("circular dependency in needs: %v → %s", path, name),
 				})
 			}

internal/linter/rules.go

@@ -158,4 +158,9 @@ const (
 	// GL044: a rules:needs: entry references a job that does not exist in the pipeline.
 	// rules:needs: overrides the top-level needs: when a specific rule matches (GitLab CI 16.4+).
 	RuleRulesNeedsUnknown = "GL044"
+
+	// GL045: an include: remote: entry uses plain HTTP instead of HTTPS.
+	// CI templates fetched over HTTP are transmitted in cleartext and can be
+	// intercepted or modified in transit.
+	RuleInsecureRemoteInclude = "GL045"
 )

internal/linter/variables.go

@@ -148,6 +148,7 @@ func checkVariableRefs(p *model.Pipeline) []Finding {
 					Job:      name,
 					File:     job.File,
 					Line:     job.Line,
+					Column:   job.Column,
 					Message:  fmt.Sprintf("rules[%d].if: $%s is not declared in pipeline or job variables:", i, varName),
 				})
 			}

internal/lsp/server.go

@@ -66,6 +66,11 @@ func (s *Server) Run() error {
 	}
 }
 
+// maxLSPMessageBytes caps the body size accepted from an LSP client.
+// A legitimate editor message is never this large; enforcing the cap prevents
+// a crafted Content-Length from triggering a multi-gigabyte allocation.
+const maxLSPMessageBytes = 64 << 20 // 64 MiB
+
 // readMessage reads one Content-Length–framed JSON-RPC message from the stream.
 func (s *Server) readMessage() (*Message, error) {
 	var contentLength int
@@ -92,6 +97,9 @@ func (s *Server) readMessage() (*Message, error) {
 	if contentLength == 0 {
 		return nil, fmt.Errorf("missing or zero Content-Length header")
 	}
+	if contentLength > maxLSPMessageBytes {
+		return nil, fmt.Errorf("Content-Length %d exceeds maximum %d", contentLength, maxLSPMessageBytes)
+	}
 
 	body := make([]byte, contentLength)
 	if _, err := io.ReadFull(s.in, body); err != nil {

internal/lsp/server_test.go

@@ -364,6 +364,20 @@ func TestServer_DidClose_ClearsdiAgnostics(t *testing.T) {
 	}
 }
 
+func TestServer_ContentLengthTooLarge(t *testing.T) {
+	// Craft a header with a content-length that exceeds the cap.
+	// The server must reject it before allocating a giant buffer.
+	header := fmt.Sprintf("Content-Length: %d\r\n\r\n", maxLSPMessageBytes+1)
+	srv, _, _ := newTestServer([]byte(header))
+	err := srv.Run()
+	if err == nil {
+		t.Fatal("expected error for oversized Content-Length, got nil")
+	}
+	if !strings.Contains(err.Error(), "exceeds maximum") {
+		t.Errorf("unexpected error: %v", err)
+	}
+}
+
 func TestServer_UriToPath(t *testing.T) {
 	tests := []struct {
 		uri  string

internal/model/parser.go

@@ -83,7 +83,8 @@ func ParseBytes(data []byte) (*Pipeline, error) {
 			return nil, fmt.Errorf("parsing job %q: %w", key, err)
 		}
 		j.Name = key
-		j.Line = keyNode.Line // exact line of the job name key
+		j.Line = keyNode.Line     // exact line of the job name key
+		j.Column = keyNode.Column // exact column of the job name key
 		p.Jobs[key] = j
 	}
 

internal/model/pipeline.go

@@ -45,9 +45,10 @@ type Workflow struct {
 }
 
 type Job struct {
-	Name string // set by parser, not from YAML
-	File string // source file; set by Parse / resolver
-	Line int    // line of the job key in its source file; set by parser
+	Name   string // set by parser, not from YAML
+	File   string // source file; set by Parse / resolver
+	Line   int    // line of the job key in its source file; set by parser
+	Column int    // column of the job key (1-indexed); set by parser
 	Stage        string   `yaml:"stage"`
 	Script       any `yaml:"script"`       // []string or string (block scalar)
 	Run          any `yaml:"run"`          // alternative to script (CI steps)

internal/resolver/extends.go

@@ -80,12 +80,15 @@ func Resolve(p *model.Pipeline) ([]ExtendWarning, error) {
 			return extWarnings, fmt.Errorf("job %q: re-decoding merged definition: %w", name, err)
 		}
 		j.Name = name
-		// Preserve source location — File/Line are not part of the YAML map
+		// Preserve source location — these fields are not part of the YAML map
 		// and are lost during the encode/decode round-trip.
 		orig := p.Jobs[name]
 		j.File = orig.File
 		j.Line = orig.Line
+		j.Column = orig.Column
 		p.Jobs[name] = j
+		// Write merged raw map back so p.RawJobs always reflects post-extends state.
+		p.RawJobs[name] = merged
 	}
 
 	return extWarnings, nil

internal/resolver/includes.go

@@ -133,6 +133,12 @@ func resolveLocalInclude(p *model.Pipeline, rawPath string, cfg fetcher.GitLabCo
 	absPath := filepath.Join(rootDir, relPath)
 	label := "local " + rawPath
 
+	// Guard against path traversal: reject any path that escapes rootDir.
+	rel, err := filepath.Rel(rootDir, absPath)
+	if err != nil || strings.HasPrefix(rel, "..") {
+		return []IncludeWarning{{Label: label, Err: fmt.Errorf("path escapes repository root: %s", rawPath)}}, nil
+	}
+
 	if visited[absPath] {
 		return nil, nil
 	}

internal/resolver/includes_test.go

@@ -6,6 +6,7 @@ import (
 	"net/http/httptest"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	"git.k3nny.fr/glint/internal/fetcher"
@@ -332,6 +333,32 @@ func TestResolveLocalInclude_WithNestedIncludes(t *testing.T) {
 	}
 }
 
+func TestResolveLocalInclude_PathTraversal(t *testing.T) {
+	dir := t.TempDir()
+	p := &model.Pipeline{Jobs: map[string]model.Job{}, RawJobs: map[string]map[string]any{}}
+	// A path that escapes the repository root via "../.." must produce a warning,
+	// not silently read an arbitrary file.
+	warnings, _ := resolveLocalInclude(p, "../../etc/passwd", fetcher.GitLabConfig{}, dir, map[string]bool{}, 0)
+	if len(warnings) == 0 {
+		t.Fatal("expected warning for path traversal, got none")
+	}
+	if !strings.Contains(warnings[0].Err.Error(), "path escapes") {
+		t.Errorf("unexpected warning: %v", warnings[0])
+	}
+	if len(p.Jobs) != 0 {
+		t.Error("no jobs should be merged when path escapes root")
+	}
+}
+
+func TestResolveLocalInclude_PathTraversalWithLeadingSlash(t *testing.T) {
+	dir := t.TempDir()
+	p := &model.Pipeline{Jobs: map[string]model.Job{}, RawJobs: map[string]map[string]any{}}
+	warnings, _ := resolveLocalInclude(p, "/../../etc/shadow", fetcher.GitLabConfig{}, dir, map[string]bool{}, 0)
+	if len(warnings) == 0 {
+		t.Fatal("expected warning for path traversal via leading slash, got none")
+	}
+}
+
 // ── resolveRemoteInclude ──────────────────────────────────────────────────────
 
 func TestResolveRemoteInclude_Success(t *testing.T) {

testdata/insecure_remote_include.yml

@@ -0,0 +1,8 @@
+stages: [build]
+
+include:
+  - remote: http://ci-templates.example.invalid/template.yml
+
+build-job:
+  stage: build
+  script: echo hello