# GBrain

> GBrain is a personal knowledge brain and GStack mod for agent platforms. Pluggable engines (PGLite default, Postgres+pgvector for scale), contract-first operations, 26 fat-markdown skills. Teaches agents brain ops, ingestion, enrichment, scheduling, identity, and access control.

Repo: https://github.com/garrytan/gbrain

## Core entry points

- [AGENTS.md](https://raw.githubusercontent.com/garrytan/gbrain/master/AGENTS.md): Start here if you are not Claude Code. Install order, trust boundary, skill resolver, config/debug/migration pointers.
- [CLAUDE.md](https://raw.githubusercontent.com/garrytan/gbrain/master/CLAUDE.md): Architecture reference. Key files, trust boundaries, engine factory, test layout.
- [INSTALL_FOR_AGENTS.md](https://raw.githubusercontent.com/garrytan/gbrain/master/INSTALL_FOR_AGENTS.md): 9-step agent installation.
- [skills/RESOLVER.md](https://raw.githubusercontent.com/garrytan/gbrain/master/skills/RESOLVER.md): Skill dispatcher. Read first for any task.
- [README.md](https://raw.githubusercontent.com/garrytan/gbrain/master/README.md): Project overview, benchmarks, 30-minute setup.

## Configuration

- [docs/ENGINES.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/ENGINES.md): PGLite vs Postgres trade-off and when to migrate.
- [docs/GBRAIN_RECOMMENDED_SCHEMA.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/GBRAIN_RECOMMENDED_SCHEMA.md): MECE directory structure (people/, companies/, concepts/).
- [docs/what-schemas-unlock.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/what-schemas-unlock.md): Why schemas matter: 7 killer use cases (4000 invisible meetings, founder ops brain, research brain, legal brain, team brain, agent-as-co-curator) + the structural argument for typed page kinds. Read this before pitching schema authoring (v0.40.7.0).
- [docs/schema-author-tutorial.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/schema-author-tutorial.md): 5-minute walkthrough: fork the bundled pack, add a custom `researcher` type, backfill existing pages via `gbrain schema sync --apply`, prove the T1.5 wiring via `gbrain whoknows` (v0.40.7.0).
- [docs/guides/live-sync.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/guides/live-sync.md): Incremental markdown sync setup.
- [docs/guides/cron-schedule.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/guides/cron-schedule.md): Recurring job scheduling.
- [docs/guides/minions-deployment.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/guides/minions-deployment.md): Deploying the gbrain jobs worker: crontab + watchdog, inline --follow, systemd/Procfile/fly.toml, upgrade checklist.
- [docs/guides/quiet-hours.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/guides/quiet-hours.md): Notification hold + timezone-aware delivery.
- [docs/guides/scaling-skills.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/guides/scaling-skills.md): Three-tier architecture for agents with 300+ skills: always-loaded, resolver-routed, and dormant. Per-turn token math, the v0.41.7.0 compact list-format resolver, and the `gbrain doctor` safety net. 306 skills, ~21K tokens freed per turn, zero capability loss.
- [docs/mcp/DEPLOY.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/mcp/DEPLOY.md): MCP server deployment.

## AI providers

- [docs/ai-providers/zeroentropy.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/ai-providers/zeroentropy.md): ZeroEntropy zembed-1 embedding + zerank-2 reranker (hosted): API key, embedding switch, reranker config.
- [docs/ai-providers/llama-server-reranker.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/ai-providers/llama-server-reranker.md): Local reranker via llama.cpp --reranking: Qwen3-Reranker or self-hosted ZE weights, --alias setup, gbrain config keys, cold-start timeout, budget-cap interaction.

## Debugging

- [docs/GBRAIN_VERIFY.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/GBRAIN_VERIFY.md): 7-check post-setup verification. Start here when something feels off.
- [docs/guides/minions-fix.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/guides/minions-fix.md): Troubleshooting the Minions job queue.
- [docs/integrations/reliability-repair.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/integrations/reliability-repair.md): Data integrity recovery.

## Migrations

- [docs/UPGRADING_DOWNSTREAM_AGENTS.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/UPGRADING_DOWNSTREAM_AGENTS.md): Patches for downstream agent skill forks. One section per release.
- [skills/migrations/](https://raw.githubusercontent.com/garrytan/gbrain/master/skills/migrations/): Per-version (v0.5.0 - v0.14.1) agent-executable migration instructions.
- [CHANGELOG.md](https://raw.githubusercontent.com/garrytan/gbrain/master/CHANGELOG.md): Release-summary voice + itemized changes + self-repair block per version.

## Philosophy

- [docs/ethos/THIN_HARNESS_FAT_SKILLS.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/ethos/THIN_HARNESS_FAT_SKILLS.md): Why skills live in markdown.
- [docs/ethos/MARKDOWN_SKILLS_AS_RECIPES.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/ethos/MARKDOWN_SKILLS_AS_RECIPES.md): Homebrew for Personal AI.

## Optional

- [docs/designs/](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/designs/): Forward-looking designs.
- [docs/architecture/infra-layer.md](https://raw.githubusercontent.com/garrytan/gbrain/master/docs/architecture/infra-layer.md): Shared infra patterns.

## Operational tips

- `gbrain doctor [--json] [--fast] [--fix]` - built-in health checks.
- `gbrain orphans [--json]` - pages with zero inbound wikilinks.
- `gbrain repair-jsonb [--dry-run]` - repair v0.12.0 double-encoded JSONB rows.
- `gbrain upgrade` runs post-upgrade + apply-migrations.
