feat: architecture improvements — test discovery, hooks schema, catalog, command map, coverage, cross-harness docs

- AGENTS.md: sync skills count to 65+
- tests/run-all.js: glob-based test discovery for *.test.js
- scripts/ci/validate-hooks.js: validate hooks.json with ajv + schemas/hooks.schema.json
- schemas/hooks.schema.json: hookItem.type enum command|notification
- scripts/ci/catalog.js: catalog agents, commands, skills (--json | --md)
- docs/COMMAND-AGENT-MAP.md: command → agent/skill map
- docs/ARCHITECTURE-IMPROVEMENTS.md: improvement recommendations
- package.json: ajv, c8 devDeps; npm run coverage
- CONTRIBUTING.md: Cross-Harness and Translations section
- .gitignore: coverage/

Made-with: Cursor

schemas/hooks.schema.json

@@ -12,17 +12,8 @@
       "properties": {
         "type": {
           "type": "string",
-          "enum": [
-            "PreToolUse",
-            "PostToolUse",
-            "PreCompact",
-            "SessionStart",
-            "SessionEnd",
-            "Stop",
-            "Notification",
-            "SubagentStop"
-          ],
-          "description": "Hook event type that triggers this hook"
+          "enum": ["command", "notification"],
+          "description": "Hook action type (command or notification)"
         },
         "command": {
           "oneOf": [