Implement plugin discovery and loader in lib/plugin-loader.cjs #192
Description
Description
Scan .mgw/plugins/ (project-local) and ~/.mgw/plugins/ (user-global) for mgw-plugin.json manifests. Validate each against the schema, load the entry point, and register into a plugin registry keyed by (name, type). Non-blocking: bad plugins log a warning and are skipped.
Acceptance Criteria
- Implement plugin discovery and loader in lib/plugin-loader.cjs
Milestone Context
| Milestone | v6 — Custom Agent Templates & Plugins |
| Phase | Phase 41: Plugin Architecture & Schema |
| GSD Route | plan-phase |
| Phase Position | Phase 1 of 5 in milestone |
Milestone Goal
A plugin architecture that lets projects drop a .mgw/plugins/ directory with custom agent templates, triage validators, and lifecycle hooks — all loaded at runtime without patching MGW core.
Phase Goal
Define the plugin manifest schema, plugin discovery mechanism (scan .mgw/plugins/ and ~/.mgw/plugins/), and the runtime loader that validates and registers plugins at startup.
Dependencies
design-plugin-manifest-schema-mgw-pluginjson
Scope Hints
- Estimated route:
plan-phase - Labels: backend, plugin-system