docs: add stage and commit skill, format

apps/tenant-router/README.md

@@ -11,7 +11,7 @@ Cloudflare Worker that fronts every browser-facing ClassroomIO host:
 The Worker forwards each request to one of two Render services based on path:
 
 | Host / path   | Upstream                                                                       |
-| ------------- | ------------------------------------------------------------ |
+| ------------- | ------------------------------------------------------------------------------ |
 | `embed.*`     | R2 `assets` bucket — `/{widget}` maps to internal keys (`src/embed-assets.ts`) |
 | `/proxy/*`    | API service (`/proxy` prefix stripped, rest forwarded as-is)                   |
 | anything else | Dashboard service                                                              |

skills/stage-and-commit/SKILL.md

@@ -0,0 +1,81 @@
+---
+name: stage-and-commit
+description: Stage changed files and create a commit following the repo's translation, formatting, and git workflow rules. Use when the user asks to stage, commit, or both.
+---
+
+Follow these steps in order. Do not skip steps or reorder them.
+
+## 1. Translations (if applicable)
+
+If `apps/dashboard/src/lib/utils/translations/en.json` is among the changed files:
+
+```bash
+cd apps/dashboard && pnpm translate
+```
+
+After running, review the generated locale files and verify that any placeholders wrapped in `{}` were preserved exactly. Fix translated variable names if needed before continuing.
+
+## 2. Format changed files
+
+Run the changed-file formatter from the repo root:
+
+```bash
+pnpm format:changed
+```
+
+If any files under `packages/ui/src/**` were changed, also run the UI prefix fixer first:
+
+```bash
+pnpm --filter @cio/ui prefix
+```
+
+Then re-run `pnpm format:changed` after the prefix fix.
+
+## 3. Stage files
+
+Stage only the files relevant to the task. Prefer explicit paths over broad commands:
+
+```bash
+git add path/to/file1 path/to/file2
+```
+
+Never use `git add -A` or `git add .` — those risk accidentally staging unrelated files, env files, or large binaries.
+
+## 4. Pre-commit checks
+
+Run these before creating the commit:
+
+```bash
+pnpm format:check
+```
+
+If staged changes include any file matching `packages/ui/src/**/*.{svelte,ts,tsx,js,jsx}`:
+
+```bash
+pnpm --filter @cio/ui prefix:check:staged
+```
+
+Fix any failures before proceeding.
+
+## 5. Commit
+
+Commit messages must follow [Conventional Commits 1.0.0](https://www.conventionalcommits.org/en/v1.0.0/):
+
+```
+<type>[optional scope]: <description>
+
+[optional body]
+```
+
+Common types: `feat`, `fix`, `chore`, `refactor`, `docs`, `style`, `test`.
+
+**Never** add `Co-Authored-By` trailers for Claude, Cursor, Codex, or any other AI tool.
+
+```bash
+git commit -m "$(cat <<'EOF'
+type(scope): short description
+
+Optional longer body if needed.
+EOF
+)"
+```