feat: add development and hf-hangman-lab skills

development: absorbed openclaw-plugin-dev as a workflow, with
reference docs for plugin structure, hooks, tools, state, config.

hf-hangman-lab: hf-wakeup workflow — full agent wakeup lifecycle:
set busy → check due slots → select & defer → identify task →
plan work → create work channel → execute. All branches end with
status reset to idle.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

development/workflows/openclaw-plugin-development.md

@@ -0,0 +1,128 @@
+# OpenClaw Plugin Development
+
+When creating or modifying an OpenClaw plugin.
+
+> Reference docs in `{baseDir}/docs/` cover each topic in detail.
+
+## Process
+
+### 1. Scaffold
+
+Create the project structure:
+
+```
+my-plugin/
+  plugin/
+    index.ts                 # export default { id, name, register }
+    openclaw.plugin.json     # config schema (additionalProperties: false)
+    package.json             # name, version, type: module
+    hooks/                   # one file per hook handler
+    tools/                   # tool registrations
+    core/                    # pure logic (no plugin-sdk imports)
+  scripts/
+    install.mjs              # --install / --uninstall
+  package.json               # dev dependencies
+  tsconfig.plugin.json
+  .gitignore
+```
+
+See `{baseDir}/docs/structure.md` for conventions.
+
+### 2. Entry Point
+
+Follow the globalThis lifecycle pattern:
+
+```typescript
+const _G = globalThis as Record<string, unknown>;
+const LIFECYCLE_KEY = "_myPluginLifecycleRegistered";
+
+export default {
+  id: "my-plugin",
+  name: "My Plugin",
+  register(api) {
+    if (!_G[LIFECYCLE_KEY]) {
+      _G[LIFECYCLE_KEY] = true;
+      // gateway-level init (once)
+      api.on("gateway_stop", () => { _G[LIFECYCLE_KEY] = false; });
+    }
+    // agent-level hooks (every register call, dedup inside)
+    registerMyHook(api);
+    registerMyTools(api);
+  },
+};
+```
+
+See `{baseDir}/docs/entry-point.md` for details.
+
+### 3. Hooks
+
+Each hook in its own file under `hooks/`. Must use dedup on globalThis:
+
+- `before_model_resolve`, `before_prompt_build` → WeakSet on event object
+- `agent_end` → Set on runId with size cap 500
+- `gateway_start/stop` → globalThis flag
+
+If returning `prependSystemContext`/`appendSystemContext`, set `allowPromptInjection: true` in config.
+
+See `{baseDir}/docs/hooks.md`.
+
+### 4. Tools
+
+Interface is `inputSchema` + `execute` (not `parameters` + `handler`):
+
+```typescript
+api.registerTool({
+  name: "my-tool",
+  inputSchema: { type: "object", properties: { ... }, required: [...] },
+  execute: async (toolCallId, params) => { return { result: "ok" }; },
+});
+```
+
+For agent context access, use factory form: `api.registerTool((ctx) => ({ ... }))`.
+
+See `{baseDir}/docs/tools.md`.
+
+### 5. State Management
+
+All mutable state on `globalThis`, not module-level variables (hot reload resets modules).
+
+- Business state, dedup sets, lifecycle flags → `globalThis`
+- Cross-plugin API → `globalThis.__pluginId`
+- Pure functions → module-level is fine
+
+See `{baseDir}/docs/state.md`.
+
+### 6. Config Schema
+
+`openclaw.plugin.json` must have `additionalProperties: false`. Every config field in install script must exist in schema. Never set sensitive fields (tokens) in install script.
+
+See `{baseDir}/docs/config.md`.
+
+### 7. Install Script
+
+```bash
+node scripts/install.mjs --install    # build, copy to ~/.openclaw/plugins/<id>, update config
+node scripts/install.mjs --uninstall  # remove from config and filesystem
+```
+
+See `{baseDir}/docs/config.md`.
+
+### 8. Build & Test
+
+```bash
+npm run build
+node scripts/install.mjs --install
+openclaw gateway restart
+openclaw logs --follow
+```
+
+### 9. Checklist Before Deploy
+
+- [ ] Hook handlers have dedup on globalThis
+- [ ] Gateway lifecycle protected by globalThis flag
+- [ ] Business state on globalThis
+- [ ] Schema matches actual config fields
+- [ ] Install script uses setIfMissing, no sensitive fields
+- [ ] Clean dist before copy (`rmSync`)
+
+See `{baseDir}/docs/debugging.md` for full checklist.