feat: adopt changesets for versioning

.changeset/config.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@3.1.1/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "fixed": [["@looped/core", "@looped/triggers", "@looped/af"]],
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "privatePackages": {
+    "version": true,
+    "tag": false
+  },
+  "ignore": []
+}

.github/workflows/version.yml

@@ -0,0 +1,33 @@
+# On pushes to main with pending changesets, open/update a "Version Packages"
+# PR that consumes them, bumps versions (package.json + deno.json via
+# scripts/sync-versions.ts), and writes changelogs. Merging that PR is the
+# cue to cut a GitHub release, which triggers publish-jsr.yml.
+name: version
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: denoland/setup-deno@v2
+        with:
+          deno-version: v2.x
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - run: npm install --no-save @changesets/cli@2.31.0
+      - uses: changesets/action@v1
+        with:
+          version: deno task version
+          commit: "release: version packages"
+          title: "release: version packages"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CLAUDE.md

@@ -0,0 +1,9 @@
+# Agent Framework
+
+## Versioning
+
+Always use changesets. Any change to `packages/` that users would notice needs a changeset (`deno task changeset`). Versions live in `deno.json` (what JSR publishes) and are synced from the changesets-managed `package.json` stubs by `deno task version` — never bump either by hand. The `version.yml` workflow opens a "Version Packages" PR on main; merging it is the cue to cut a GitHub release, which publishes to JSR.
+
+## Documentation
+
+Always read `skills/writing/looped-docs.md` before writing any documentation or copy. It supersedes default writing style.

deno.json

@@ -5,6 +5,8 @@
     "./packages/cli"
   ],
   "tasks": {
+    "changeset": "deno run --allow-read --allow-write --allow-env --allow-sys --allow-run=git npm:@changesets/cli@2.31.0",
+    "version": "deno task changeset version && deno run --allow-read --allow-write scripts/sync-versions.ts",
     "test": "deno test --allow-read --allow-write --allow-env --allow-run=bash --allow-net=127.0.0.1,0.0.0.0 packages/",
     "check": "deno check packages/",
     "ok": "deno fmt --check && deno lint && deno task check && deno task test",