feat(ci): migrate release flow to release-please

.github/workflows/release-please.yml

@@ -0,0 +1,17 @@
+name: Release Please
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions: read-all
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "0.5.7"
+}

CLAUDE.md

@@ -64,16 +64,10 @@ Enforced by commitlint in CI (on PRs) via `commitlint.config.ts`.
 
 **Semver policy:** 0.x = pre-release (breaking changes allowed in minor bumps). 1.0 = first stable release.
 
-**Cutting a release:**
+**Release flow:** Automated by [release-please](https://github.com/googleapis/release-please). On every push to `main`, `release-please.yml` reads conventional commits since the last release and opens/updates a long-lived "Release PR" that bumps `package.json` + `.release-please-manifest.json` and updates `CHANGELOG.md`. Merging that PR creates the git tag (`v0.x.y`) and the GitHub Release.
 
-```bash
-# 1. Bump version + regenerate changelog
-pnpm version:patch   # or version:minor / version:major
-
-# 2. Commit, tag, and push
-pnpm release
-```
+Config: `release-please-config.json` + `.release-please-manifest.json`.
 
-This creates a git tag (`v0.1.0`, etc.) which triggers the `release.yml` workflow to build, test, and publish a GitHub Release with auto-generated changelog notes.
+To trigger a release: merge the Release PR. To force a re-evaluation: `gh workflow run release-please.yml --ref main`.
 
-**Changelog:** Generated from conventional commits via `conventional-changelog`. The full history lives in `CHANGELOG.md`.
+**Changelog:** Maintained by release-please from conventional commits. The full history lives in `CHANGELOG.md`.

package.json

@@ -8,12 +8,7 @@
     "build": "turbo run build",
     "test": "turbo run test",
     "lint": "turbo run lint",
-    "typecheck": "turbo run typecheck",
-    "changelog": "conventional-changelog -p conventionalcommits -i CHANGELOG.md -s -r 0",
-    "version:patch": "npm version patch --no-git-tag-version && pnpm changelog",
-    "version:minor": "npm version minor --no-git-tag-version && pnpm changelog",
-    "version:major": "npm version major --no-git-tag-version && pnpm changelog",
-    "release": "git add -A && git commit -m \"chore(release): v$(node -p 'require(\"./package.json\").version')\" && git tag v$(node -p 'require(\"./package.json\").version') && git push && git push --tags"
+    "typecheck": "turbo run typecheck"
   },
   "pnpm": {
     "overrides": {
@@ -31,7 +26,6 @@
     "@eslint/js": "^10.0.1",
     "@typescript-eslint/eslint-plugin": "^8.59.3",
     "@typescript-eslint/parser": "^8.59.3",
-    "conventional-changelog": "^7.2.0",
     "eslint": "^10.3.0",
     "turbo": "^2.9.12",
     "typescript": "^6.0.0",