Scratchpad: MACP OC Bridge (2026-03-30)

Objective: Replace the OpenClaw MACP plugin's Pi-direct runTurn with the MACP controller queue bridge.
Scope: plugins/macp/src/macp-runtime.ts, plugins/macp/src/index.ts, plugins/macp/openclaw.plugin.json, plugins/macp/README.md.
Plan:
1. Read controller/dispatcher/plugin docs and confirm queue/result contract.
2. Queue tasks through .mosaic/orchestrator/tasks.json using a brief file and controller trigger.
3. Poll result JSON, stream output back to ACP, then validate with typecheck/format checks.
Risks:
- The repo orchestrator must be enabled in .mosaic/orchestrator/config.json.
- Result JSON does not always embed worker output, so the runtime falls back to metadata-linked output files or a formatted result summary.
Verification:
- npx tsc --noEmit --target es2022 --module nodenext --moduleResolution nodenext --skipLibCheck plugins/macp/src/macp-runtime.ts plugins/macp/src/index.ts
- pnpm prettier --write "plugins/macp/**/*.{ts,json,md}"
- pnpm format:check
- npx tsc --noEmit -p plugins/macp/tsconfig.json still fails in this branch because plugins/macp/tsconfig.json extends a missing packages/config/typescript/library.json file and also pulls in pre-existing external OpenClaw type noise.