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Garry TanandClaude Opus 4.7
79d09bc3e6
Adds the foundation for Minions as universal agent orchestration infrastructure.
GBrain's Postgres-native job queue now supports durable, observable, steerable
background agents. The OpenClaw plugin (separate repo) will consume these via
library import, not MCP, for zero-latency local integration.
## New capabilities
- **Concurrent worker** — Promise pool replaces sequential loop. Per-job
AbortController for cooperative cancellation. Graceful shutdown waits for
all in-flight jobs via Promise.allSettled.
- **Pause/resume** — pauseJob clears the lock and fires AbortSignal on active
jobs. Handlers check ctx.signal.aborted and exit cleanly. resumeJob returns
paused jobs to waiting. Catch block skips failJob when signal.aborted.
- **Inbox (separate table)** — minion_inbox table for sidechannel messages.
sendMessage with sender validation (parent job or admin). readInbox is
token-fenced and marks read_at atomically. Separate table avoids row bloat
from rewriting JSONB on every send.
- **Token accounting** — tokens_input/tokens_output/tokens_cache_read columns.
updateTokens accumulates; completeJob rolls child tokens up to parent.
USD cost computed at read time (no cost_usd column — pricing too volatile).
- **Job replay** — replayJob clones a terminal job with optional data overrides.
New job, fresh attempts, no parent link.
## Handler contract additions
MinionJobContext now provides:
- `signal: AbortSignal` — cooperative cancellation
- `updateTokens(tokens)` — accumulate token usage
- `readInbox()` — check for sidechannel messages
- `log()` — now accepts string or TranscriptEntry
## MCP operations added
pause_job, resume_job, replay_job, send_job_message — all auto-generate CLI
commands and MCP server endpoints.
## Library exports
package.json exports map adds ./minions and ./engine-factory paths so plugins
can `import { MinionQueue } from 'gbrain/minions'` for direct library use.
## Instruction layer (the teaching)
- skills/minion-orchestrator/SKILL.md — when/how to use Minions, decision
matrix, lifecycle management, anti-patterns
- skills/conventions/subagent-routing.md — cross-cutting rule: all background
work goes through Minions
- RESOLVER.md — trigger entries for agent orchestration
- manifest.json — registered
## Schema migration v6
Additive: 3 token columns, paused status, minion_inbox table with unread index.
Full Postgres + PGLite support. No backfill needed.
## Tests
65 tests (was 43): pause/resume (5), inbox (6), tokens (4), replay (4),
concurrent worker context (3), plus all existing coverage.
## What's NOT in this commit
Deferred to follow-up PRs:
- LISTEN/NOTIFY subscribe (needs real Postgres E2E)
- Resource governor (depends on concurrent worker stress testing)
- Routing eval harness (needs API keys + benchmark data)
- OpenClaw plugin (separate @gbrain/openclaw-minions-plugin repo)
See docs/designs/MINIONS_AGENT_ORCHESTRATION.md for full CEO-approved design.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>