ci: label each pull request by area from the files it changes (#272)

.github/labeler.yml

@@ -0,0 +1,51 @@
+# Labels a pull request by what it changes. The areas match the ones the
+# issues and the board use. A label is only ever added, never taken off.
+area:client:
+  - changed-files:
+      - any-glob-to-any-file: ['apps/sisyphus/**', 'packages/client/**']
+i18n:
+  - changed-files:
+      - any-glob-to-any-file: ['apps/sisyphus/src/renderer/src/i18n/**']
+area:protocol:
+  - changed-files:
+      - any-glob-to-any-file: ['proto/**']
+area:ai:
+  - changed-files:
+      - any-glob-to-any-file: ['packages/ai/**', 'apps/sisyphusd/planner/**', 'apps/sisyphusd/inference/**', 'apps/sisyphusd/assistant*.go']
+area:agents:
+  - changed-files:
+      - any-glob-to-any-file: ['apps/sisyphusd/mcpserver/**', 'skills/**']
+area:runtime:
+  - changed-files:
+      - any-glob-to-any-file: ['packages/runtime/**']
+area:storage:
+  - changed-files:
+      - any-glob-to-any-file: ['packages/storage/**', 'packages/kubo/**', 'packages/ipfscluster/**', 'packages/s3/**', 'packages/names/**', 'apps/sisyphusd/pinning/**', 'apps/sisyphusd/replication/**', 'apps/sisyphusd/blobclient/**']
+area:p2p:
+  - changed-files:
+      - any-glob-to-any-file: ['apps/sisyphusd/p2p/**', 'apps/sisyphusd/tunnel/**']
+area:daemon:
+  - changed-files:
+      - any-glob-to-any-file: ['apps/sisyphusd/*.go', 'apps/sisyphusd/coordinator/**', 'apps/sisyphusd/worker/**', 'apps/sisyphusd/api/**', 'apps/sisyphusd/access/**', 'packages/nodedb/**', 'packages/job-model/**', 'packages/jobrecord/**', 'packages/hardware/**']
+security:
+  - changed-files:
+      - any-glob-to-any-file: ['packages/sealed/**', 'apps/sisyphusd/access/**', 'SECURITY.md', 'docs/security-model.md']
+research:
+  - changed-files:
+      - any-glob-to-any-file: ['docs/research/**']
+documentation:
+  - changed-files:
+      - any-glob-to-any-file: ['**/*.md', 'docs/**']
+infra:
+  - changed-files:
+      - any-glob-to-any-file: ['.github/workflows/**', '.github/dependabot.yml', 'flake.*', 'Makefile', 'scripts/**', 'examples/rehearsal.sh']
+community:
+  - changed-files:
+      - any-glob-to-any-file: ['CODE_OF_CONDUCT.md', 'CONTRIBUTING.md', 'SUPPORT.md', 'CITATION.cff', '.github/ISSUE_TEMPLATE/**', '.github/pull_request_template.md']
+testing:
+  - changed-files:
+      - all-globs-to-all-files: ['**/*_test.go', 'apps/sisyphus/e2e/**', 'apps/sisyphus/dev/*.test.mjs']
+enhancement:
+  - head-branch: ['^feat/']
+bug:
+  - head-branch: ['^fix/']

.github/workflows/labels.yml

@@ -0,0 +1,19 @@
+name: Labels
+
+# Labels each pull request by the files it changes and the kind of branch it
+# comes from, so that the board and the milestones can be read by area.
+# pull_request_target runs this workflow as it is on dev, with the right to
+# label, and never checks out or runs the pull request's own code.
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  label:
+    runs-on: ubuntu-26.04
+    steps:
+      - uses: actions/labeler@v7

CONTRIBUTING.md

@@ -12,6 +12,7 @@ Sisyphus is an early prototype built in the open. Issues, questions and pull req
 - Branch from `dev` and open the pull request against `dev`. Nothing is pushed to `dev` directly.
 - A pull request merges by squash once its checks are green, so each commit on `dev` has passed.
 - Commit and pull request titles use a conventional prefix: `feat:`, `fix:`, `docs:`, `test:`, `chore:`.
+- A pull request is labelled by area from the files it changes (`.github/labeler.yml`); the maintainers add the milestone.
 - Keep documentation current in the same pull request: the root README, `apps/sisyphusd/README.md` and the files under `docs/`.
 
 ## What the checks expect