Introduces a first-class Project entity that groups channels and
provides shared context to agents — eliminating the need to
copy-paste canvas instructions into every new channel.
Projects are relay-stored Nostr events (kinds 50001-50003) with a
full CRUD pipeline: DB table, relay ingest/side-effects, REST API,
SDK builders, and 5 MCP tools (create, get, list, update, delete).
Channels gain an optional project_id FK. When a channel belongs to
a project, the ACP harness automatically injects the project's
prompt, repos, and environment into the [Context] block that agents
receive — no manual setup required.
Includes 21 tests (SDK builders, ingest classification, DB CRUD),
environment validation, empty-update guards, and updates to
VISION.md and TESTING.md.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
