feat(build): add multi-platform release targets, Homebrew formula, and INSTALL.md

Taskfile:
- Add build-linux-arm64, build-darwin-amd64, build-darwin-arm64 targets
- Rename build-linux to build-linux-amd64 (keep build-linux alias)
- Rename Windows output to glint-<tag>-windows-amd64.exe for consistency
- Add build-release task that builds all five platforms in one shot

Formula/glint.rb:
- Homebrew source-build formula; depends_on "go" => :build
- tap: brew tap k3nny/glint https://github.com/k3nny/homebrew-glint
- Includes basic test block (--version + lint a trivial pipeline)

INSTALL.md:
- Pre-built binary download instructions for all five platforms
- Homebrew tap setup and formula update procedure
- go install one-liner
- Link to README integrations section

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

Formula/glint.rb

@@ -0,0 +1,29 @@
+class Glint < Formula
+  desc "Local linter and validator for .gitlab-ci.yml pipelines"
+  homepage "https://git.k3nny.fr/k3nny/glint"
+  url "https://git.k3nny.fr/k3nny/glint/archive/v0.3.1.tar.gz"
+  # Update sha256 on each release: sha256sum glint-vX.Y.Z.tar.gz
+  sha256 ""
+  license "Apache-2.0"
+  head "https://git.k3nny.fr/k3nny/glint.git", branch: "main"
+
+  depends_on "go" => :build
+
+  def install
+    system "go", "build",
+           "-ldflags", "-X main.version=#{version}",
+           "-o", bin/"glint",
+           "./cmd/glint/..."
+  end
+
+  test do
+    assert_match version.to_s, shell_output("#{bin}/glint --version")
+    (testpath/".gitlab-ci.yml").write <<~YAML
+      stages: [build]
+      build-job:
+        stage: build
+        script: echo ok
+    YAML
+    system bin/"glint", "check", ".gitlab-ci.yml"
+  end
+end

INSTALL.md

@@ -0,0 +1,139 @@
+# Installing glint
+
+## Requirements
+
+- Go 1.21 or later (for building from source)
+- Any 64-bit Linux, macOS, or Windows system (for pre-built binaries)
+
+---
+
+## Option 1 — Build from source
+
+```bash
+git clone https://git.k3nny.fr/k3nny/glint
+cd glint
+go build -o glint ./cmd/glint/...
+sudo mv glint /usr/local/bin/
+```
+
+Or with [Task](https://taskfile.dev):
+
+```bash
+task build
+sudo mv glint /usr/local/bin/
+```
+
+---
+
+## Option 2 — Download a pre-built binary
+
+Pre-built binaries are attached to each [release](https://git.k3nny.fr/k3nny/glint/releases).
+
+| Platform | File |
+|----------|------|
+| Linux x86-64 | `glint-vX.Y.Z-linux-amd64` |
+| Linux ARM64 | `glint-vX.Y.Z-linux-arm64` |
+| macOS Intel | `glint-vX.Y.Z-darwin-amd64` |
+| macOS Apple Silicon | `glint-vX.Y.Z-darwin-arm64` |
+| Windows x86-64 | `glint-vX.Y.Z-windows-amd64.exe` |
+
+### Linux (amd64)
+
+```bash
+VERSION=v0.3.1
+curl -Lo glint https://git.k3nny.fr/k3nny/glint/releases/download/${VERSION}/glint-${VERSION}-linux-amd64
+chmod +x glint
+sudo mv glint /usr/local/bin/
+```
+
+### Linux (ARM64 — Raspberry Pi 4, AWS Graviton, …)
+
+```bash
+VERSION=v0.3.1
+curl -Lo glint https://git.k3nny.fr/k3nny/glint/releases/download/${VERSION}/glint-${VERSION}-linux-arm64
+chmod +x glint
+sudo mv glint /usr/local/bin/
+```
+
+### macOS (Apple Silicon — M1/M2/M3)
+
+```bash
+VERSION=v0.3.1
+curl -Lo glint https://git.k3nny.fr/k3nny/glint/releases/download/${VERSION}/glint-${VERSION}-darwin-arm64
+chmod +x glint
+sudo mv glint /usr/local/bin/
+```
+
+### macOS (Intel)
+
+```bash
+VERSION=v0.3.1
+curl -Lo glint https://git.k3nny.fr/k3nny/glint/releases/download/${VERSION}/glint-${VERSION}-darwin-amd64
+chmod +x glint
+sudo mv glint /usr/local/bin/
+```
+
+### Verify the installation
+
+```bash
+glint --version
+```
+
+---
+
+## Option 3 — Homebrew (macOS and Linux)
+
+A Homebrew tap is available at `k3nny/glint`.
+
+> **First-time setup:** create a GitHub repository named `homebrew-glint`
+> under your account and copy [`Formula/glint.rb`](Formula/glint.rb) into it.
+> Users then install via the tap as shown below.
+
+```bash
+brew tap k3nny/glint https://github.com/k3nny/homebrew-glint
+brew install glint
+```
+
+To upgrade:
+
+```bash
+brew upgrade glint
+```
+
+The formula builds glint from source using Go, which Homebrew provides
+automatically as a build dependency. No pre-built binary download is needed.
+
+### Updating the formula on a new release
+
+After tagging a new release, update `Formula/glint.rb`:
+
+1. Compute the tarball checksum:
+   ```bash
+   curl -sL https://git.k3nny.fr/k3nny/glint/archive/vX.Y.Z.tar.gz | sha256sum
+   ```
+2. Update `url` and `sha256` in the formula.
+3. Commit and push to `homebrew-glint`.
+
+---
+
+## Option 4 — Go install
+
+If you already have Go 1.21+:
+
+```bash
+go install git.k3nny.fr/k3nny/glint/cmd/glint@latest
+```
+
+The binary is placed in `$(go env GOPATH)/bin/`. Add that directory to your
+`PATH` if it is not already there:
+
+```bash
+export PATH="$PATH:$(go env GOPATH)/bin"
+```
+
+---
+
+## Integrations
+
+For editor and CI integrations (pre-commit hook, GitLab CI component, GitHub
+Actions, VS Code extension) see [README.md](README.md#integrations).

README.md

@@ -27,25 +27,30 @@ A local tool to validate and lint `.gitlab-ci.yml` pipelines without needing a G
 
 See [FEATURES.md](FEATURES.md) for the complete feature reference and lint rules table, and [ROADMAP.md](ROADMAP.md) for planned improvements.
 
-## Requirements
-
-- Go 1.21 or later
-- [Task](https://taskfile.dev) (optional, for development tasks)
-
 ## Installation
 
+See [INSTALL.md](INSTALL.md) for all options: pre-built binaries (Linux amd64/arm64, macOS Intel/Apple Silicon, Windows), Homebrew tap, and building from source.
+
+Quick start (Linux/macOS, building from source):
+
 ```bash
 git clone https://git.k3nny.fr/k3nny/glint
 cd glint
 go build -o glint ./cmd/glint/...
+sudo mv glint /usr/local/bin/
 ```
 
-Or with Task:
+Homebrew:
 
 ```bash
-task build
+brew tap k3nny/glint https://github.com/k3nny/homebrew-glint
+brew install glint
 ```
 
+## Requirements
+
+Go 1.21 or later (when building from source). Pre-built binaries have no runtime dependencies.
+
 ## Usage
 
 ```
@@ -148,8 +153,12 @@ 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 build-linux-amd64   # cross-compile for Linux x86-64 (requires a tagged commit)
+task build-linux-arm64   # cross-compile for Linux ARM64 (requires a tagged commit)
+task build-darwin-amd64  # cross-compile for macOS Intel (requires a tagged commit)
+task build-darwin-arm64  # cross-compile for macOS Apple Silicon (requires a tagged commit)
+task build-windows       # cross-compile for Windows x86-64 (requires a tagged commit)
+task build-release       # build all platform binaries at once (requires a tagged commit)
 task clean        # remove build artifacts
 ```
 

Taskfile.yml

@@ -145,30 +145,15 @@ tasks:
       - task: build
       - task: validate
 
-  build-windows:
-    desc: Build the glint binary for Windows x64 (requires a tagged commit)
+  build-linux-amd64:
+    desc: Build the glint binary for Linux x86-64 (requires a tagged commit)
+    aliases: [build-linux]
     vars:
       TAG:
         sh: git describe --tags --exact-match
     preconditions:
       - sh: git describe --tags --exact-match
-        msg: "Current commit is not tagged — Windows build requires a git tag"
-    cmds:
-      - "GOOS=windows GOARCH=amd64 {{.GO}} build -ldflags \"-X main.version={{.TAG}}\" -o {{.BINARY}}-{{.TAG}}.exe ./cmd/glint/..."
-    sources:
-      - "**/*.go"
-      - go.mod
-    generates:
-      - "{{.BINARY}}-{{.TAG}}.exe"
-
-  build-linux:
-    desc: Build the glint binary for Linux x64 (requires a tagged commit)
-    vars:
-      TAG:
-        sh: git describe --tags --exact-match
-    preconditions:
-      - sh: git describe --tags --exact-match
-        msg: "Current commit is not tagged — Linux build requires a git tag"
+        msg: "Current commit is not tagged — release build requires a git tag"
     cmds:
       - "GOOS=linux GOARCH=amd64 {{.GO}} build -ldflags \"-X main.version={{.TAG}}\" -o {{.BINARY}}-{{.TAG}}-linux-amd64 ./cmd/glint/..."
     sources:
@@ -177,6 +162,79 @@ tasks:
     generates:
       - "{{.BINARY}}-{{.TAG}}-linux-amd64"
 
+  build-linux-arm64:
+    desc: Build the glint binary for Linux ARM64 (requires a tagged commit)
+    vars:
+      TAG:
+        sh: git describe --tags --exact-match
+    preconditions:
+      - sh: git describe --tags --exact-match
+        msg: "Current commit is not tagged — release build requires a git tag"
+    cmds:
+      - "GOOS=linux GOARCH=arm64 {{.GO}} build -ldflags \"-X main.version={{.TAG}}\" -o {{.BINARY}}-{{.TAG}}-linux-arm64 ./cmd/glint/..."
+    sources:
+      - "**/*.go"
+      - go.mod
+    generates:
+      - "{{.BINARY}}-{{.TAG}}-linux-arm64"
+
+  build-darwin-amd64:
+    desc: Build the glint binary for macOS Intel (requires a tagged commit)
+    vars:
+      TAG:
+        sh: git describe --tags --exact-match
+    preconditions:
+      - sh: git describe --tags --exact-match
+        msg: "Current commit is not tagged — release build requires a git tag"
+    cmds:
+      - "GOOS=darwin GOARCH=amd64 {{.GO}} build -ldflags \"-X main.version={{.TAG}}\" -o {{.BINARY}}-{{.TAG}}-darwin-amd64 ./cmd/glint/..."
+    sources:
+      - "**/*.go"
+      - go.mod
+    generates:
+      - "{{.BINARY}}-{{.TAG}}-darwin-amd64"
+
+  build-darwin-arm64:
+    desc: Build the glint binary for macOS Apple Silicon (requires a tagged commit)
+    vars:
+      TAG:
+        sh: git describe --tags --exact-match
+    preconditions:
+      - sh: git describe --tags --exact-match
+        msg: "Current commit is not tagged — release build requires a git tag"
+    cmds:
+      - "GOOS=darwin GOARCH=arm64 {{.GO}} build -ldflags \"-X main.version={{.TAG}}\" -o {{.BINARY}}-{{.TAG}}-darwin-arm64 ./cmd/glint/..."
+    sources:
+      - "**/*.go"
+      - go.mod
+    generates:
+      - "{{.BINARY}}-{{.TAG}}-darwin-arm64"
+
+  build-windows:
+    desc: Build the glint binary for Windows x86-64 (requires a tagged commit)
+    vars:
+      TAG:
+        sh: git describe --tags --exact-match
+    preconditions:
+      - sh: git describe --tags --exact-match
+        msg: "Current commit is not tagged — release build requires a git tag"
+    cmds:
+      - "GOOS=windows GOARCH=amd64 {{.GO}} build -ldflags \"-X main.version={{.TAG}}\" -o {{.BINARY}}-{{.TAG}}-windows-amd64.exe ./cmd/glint/..."
+    sources:
+      - "**/*.go"
+      - go.mod
+    generates:
+      - "{{.BINARY}}-{{.TAG}}-windows-amd64.exe"
+
+  build-release:
+    desc: Build release binaries for all supported platforms (requires a tagged commit)
+    cmds:
+      - task: build-linux-amd64
+      - task: build-linux-arm64
+      - task: build-darwin-amd64
+      - task: build-darwin-arm64
+      - task: build-windows
+
   fuzz:
     desc: "Run all fuzz targets (set FUZZ_TIME=60s to control per-target duration, default 30s)"
     cmds: