# MACP wiring investigation

**Scope:** `/src/mosaic-stack` inspected at HEAD `b79336a8c11e2a4646a47ff8d295a226e0c71404`; read-only. Existing dirty/untracked state was not touched.

## Verdict

**(c) STRANDED.** `packages/macp` is exported, unit-tested, and registered as a CLI command group, but no production dispatch/execution code invokes its credential resolver, gate runner, or event emitter.  
A separate MACP-named OpenClaw/orchestrator rail exists, but it redefines task/result types and gate/event logic instead of importing `@mosaicstack/macp`; direct `mosaic yolo|claude|codex|opencode|pi` also bypasses it.

## 1. Production call sites vs tests

### Production references to `@mosaicstack/macp`

| Surface                 | Evidence                                                                                                                               | Actual use                                                                                                                                                                |
| ----------------------- | -------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Unified CLI             | `packages/mosaic/src/cli.ts:8,385`                                                                                                     | Imports and registers `registerMacpCommand`; no task/gate/event execution.                                                                                                |
| Forge                   | `packages/forge/src/types.ts:1,17,68,79`                                                                                               | **Type-only** imports of `GateEntry` and `TaskResult`. Pipeline calls an injected abstract executor at `packages/forge/src/pipeline-runner.ts:189-190,299-300`, not MACP. |
| Mosaic package metadata | `packages/mosaic/package.json:36`; `packages/mosaic/src/runtime/update-checker.ts:172`                                                 | Dependency/update inventory only.                                                                                                                                         |
| Agent                   | No match under production `packages/agent/src/**`                                                                                      | No MACP import/call.                                                                                                                                                      |
| Coord                   | No match under production `packages/coord/src/**`; dependency list is only `@mosaicstack/types` at `packages/coord/package.json:25-27` | No MACP import/call.                                                                                                                                                      |
| Plugins                 | No `@mosaicstack/macp` import under `plugins/**`                                                                                       | No package use; the MACP-named plugin is an independent implementation (below).                                                                                           |

**Repository-wide production call-site search result:** excluding `packages/macp/**`, tests, worktrees, and build output, there are **zero** calls to `runGate`, `runGates`, `emitEvent`, `appendEvent`, or `resolveCredentials`.

### `packages/macp` implementation is internally connected only

- Public exports: `packages/macp/src/index.ts:1-48` exports Task/GateEntry/MACPEvent/TaskResult, credential resolution, `runGate(s)`, risk-floor, and event emission.
- Gate runner calls its own event emitter: `packages/macp/src/gate-runner.ts:187-236`.
- Event persistence implementation appends NDJSON to a caller-supplied path: `packages/macp/src/event-emitter.ts:11-27`.
- There is **no exported programmatic `submit` implementation** in `packages/macp/src/index.ts:1-48`; only the CLI placeholder named `submit`.

### Test-only invocations

- Gate runner: `packages/macp/__tests__/gate-runner.test.ts:96-242` invokes `runGate/runGates`.
- Event ledger: `packages/macp/__tests__/event-emitter.test.ts:46-133` invokes `appendEvent/emitEvent` against temporary `events.ndjson` files.
- Credential resolver: `packages/macp/__tests__/credential-resolver.test.ts` exercises resolver behavior.
- CLI tests only verify command registration: `packages/macp/src/cli.spec.ts:37-73`; `packages/mosaic/src/cli-smoke.spec.ts:8` imports registration.

## 2. Gate on the live dispatch path

### Direct Mosaic runtime launch bypasses MACP

- Runtime commands dispatch directly to harness launch: `packages/mosaic/src/commands/launch.ts:730-801`.
- Claude/Pi go through the lease broker, then spawn the runtime: `packages/mosaic/src/commands/launch.ts:817-843`.
- Commander wiring sends `mosaic yolo <runtime>` and direct runtime commands to `launchRuntime`: `packages/mosaic/src/commands/launch.ts:1102-1157,1165-1167`.
- None of those ranges imports/calls `@mosaicstack/macp`, `runGates`, or `emitEvent`.

**Result:** a direct `mosaic yolo`, `mosaic claude/codex/opencode/pi`, or underlying exec does not create a typed MACP Task, run the package gate-runner, or append a package MACPEvent.

### Coord bypasses MACP

- Coord reads/updates `docs/TASKS.md`: `packages/coord/src/runner.ts:6,306-386`; parser/writer is `packages/coord/src/tasks-file.ts:326-377`.
- Coord launches a child process directly: `packages/coord/src/runner.ts:397-427`.
- Mission state is its own `.mosaic/orchestrator/mission.json`/`next-task.json`: `packages/coord/src/mission.ts:8-12`; `packages/coord/src/runner.ts:15-16,355-384`.

**Result:** Coord task execution has no MACP Task validation, package gate runner, or event append.

### Forge bypasses MACP execution

- Forge defines its own `ForgeTask` and abstract `TaskExecutor`: `packages/forge/src/types.ts:48-80`.
- The production CLI injects a **stub executor** that immediately reports completion with empty gates: `packages/forge/src/cli.ts:13-31,167,185`.

**Result:** even `mosaic forge run` does not execute MACP gates or persist MACP events.

### Separate MACP-named rail is not `packages/macp`

- OpenClaw plugin registers an ACP backend named `macp`: `plugins/macp/src/index.ts:1-18,72-102`.
- It locally redefines `OrchestratorTask`, `TaskResult`, and gate-result shapes instead of importing package types: `plugins/macp/src/macp-runtime.ts:43-77`.
- It appends directly to `.mosaic/orchestrator/tasks.json`, triggers an external controller, and polls `results/<task>.json`: `plugins/macp/src/macp-runtime.ts:290-329,437-483`.
- The controller independently implements `append_event`, `emit_event`, shell execution, gate execution, and results: `packages/mosaic/framework/tools/orchestrator-matrix/controller/mosaic_orchestrator.py:29-91,126-276`.
- Its gate loop runs raw string gates after worker success: `mosaic_orchestrator.py:213-235`; it does not support the package's structured `GateEntry`/AI-review behavior.
- Current checkout disables this controller: `.mosaic/orchestrator/config.json:2` (`"enabled": false`).
- Plugin references `tools/macp/dispatcher/pi_runner.ts` at `plugins/macp/src/macp-runtime.ts:85-91`, but `tools/macp/` does not exist in this checkout.

**Result:** there is a parallel, optionally enabled MACP-shaped rail, not package integration. It cannot make `packages/macp` the enforced path.

## 3. Event ledger status

- Package persistence exists only as a library primitive: `packages/macp/src/event-emitter.ts:11-27` appends JSON lines to an arbitrary `eventsPath`.
- Package event emission is reached only from package `runGates`: `packages/macp/src/gate-runner.ts:204-236`.
- No production caller invokes package `runGates/emitEvent/appendEvent`; therefore no runtime destination path is configured for the package ledger.
- Test-only ledgers use temp paths: `packages/macp/__tests__/event-emitter.test.ts:35-133`; gate tests use temp `events.ndjson`: `packages/macp/__tests__/gate-runner.test.ts:171-242`.
- The separate Python controller writes `.mosaic/orchestrator/events.ndjson`: `mosaic_orchestrator.py:129-133,159-161,219-235`; the Mosaic Framework plugin only **reads** that file for context at `plugins/mosaic-framework/src/index.ts:279-316,430-438`.
- In this checkout, `.mosaic/orchestrator/events.ndjson` is absent and the controller is disabled (`.mosaic/orchestrator/config.json:2`).

**Conclusion:** `MACPEvent` from `packages/macp` is defined/tested but not emitted or persisted by live production call sites. The similarly shaped Python ledger is a duplicate island.

## 4. Coord link

- `packages/coord` has no `@mosaicstack/macp` dependency/import: `packages/coord/package.json:25-27`; no matches in `packages/coord/src/**`.
- Coord's task model is Markdown `docs/TASKS.md` plus mission/session JSON: `packages/coord/src/tasks-file.ts:1-10,257-377`; `packages/coord/src/mission.ts:8-12`; `packages/coord/src/runner.ts:306-427`.
- It does not consume `.mosaic/orchestrator/events.ndjson`, MACP Task, MACPEvent, GateEntry, or TaskResult.

**Conclusion:** Coord and `packages/macp` are disconnected islands.

## Shortest wiring gap

**Single integration point:** replace the duplicated execution/gate/event block in `mosaic_orchestrator.py::run_single_task` (`:126-276`) with one production Node `TaskExecutor` backed by `@mosaicstack/macp` (typed Task validation + `resolveCredentials` + `runGates` + `emitEvent`), and make Coord/Forge/OpenClaw submit through that executor. This queue/controller choke point is where `yolo|acp|exec` worker outcomes can be gated and journaled before completion is recorded.
