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activegraph-gbrain-bridge

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ActiveGraph/GBrain bridge proof of concept for Apprentice launch.

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# ActiveGraph GBrain Bridge

Thin compatibility bridge between [ActiveGraph](https://github.com/yoheinakajima/activegraph) and [GBrain](https://github.com/garrytan/gbrain).

GBrain is the durable knowledge and ontology layer: markdown/Git source of truth, retrieval indexes, typed links, facts, takes, timelines, MCP operations, ingestion, and jobs. ActiveGraph is the runtime-causality layer: event log, graph projection, replay, branching, policy gates, and provenance.

The bridge keeps those responsibilities separate:

```text
GBrain stores durable world knowledge.
ActiveGraph records and governs how an agent uses or proposes changes to it.
```

For a publication-facing explanation of why dynamic context graphs matter for workflow automation, see [docs/launch_post.md](docs/launch_post.md).

For the current implementation status, read [STATUS.md](STATUS.md) first.

## What Works Today

- Installable Python package: `activegraph-gbrain`.
- Import path and ActiveGraph pack entry point: `activegraph_gbrain`.
- Typed GBrain client surface for read, schema, job, and dry-run writeback proposal operations.
- Fixture and recorded-fixture clients that never call live GBrain.
- Read-only MCP/HTTP client boundary with test transport injection.
- ActiveGraph object and relation projections for GBrain evidence and schema metadata.
- Redaction-aware request, completion, failure, and replay fixture helpers.
- Fixture-mode lookup behaviors for `question` and `goal` objects.
- Policy-gated dry-run writeback proposal helpers.
- Disposable/local read-only trace demo with replay fixture generation.

## What Does Not Work Yet

- No pack-local ActiveGraph tools are exposed yet; `activegraph_gbrain.tools.TOOLS` is intentionally empty.
- The default lookup behavior does not call live GBrain.
- Production live writeback is not supported.
- GBrain versions not listed in the compatibility matrix are unverified.
- The project does not claim endorsement by either upstream project.

## Quickstart

Install development dependencies:

```bash
python -m pip install -e '.[dev]'
```

Run the core validation path:

```bash
python -m pytest -q
python examples/import_smoke.py
python examples/brain_first_qa_demo.py
python examples/live_readonly_trace_demo.py
```

These commands do not call private GBrain data, a live LLM, Slack, GitHub, a deployment, or production writeback.

## Stable API

Use `activegraph_gbrain.api` for documented imports:

```python
from activegraph_gbrain.api import (
    ActiveGraphGBrainSettings,
    FixtureGBrainClient,
    RecordedGBrainFixtureClient,
    pack,
)
```

The package root still exports a broad early-development surface for compatibility with existing tests and demos. New user-facing examples should prefer `activegraph_gbrain.api`.

## Documentation

- [STATUS.md](STATUS.md) is the current support and maturity ledger.
- [docs/demos.md](docs/demos.md) lists every committed demo and what each one proves.
- [docs/gbrain_compatibility_matrix.md](docs/gbrain_compatibility_matrix.md) records exact GBrain versions, commits, operation families, and caveats.
- [docs/integration_guide.md](docs/integration_guide.md) provides the longer architecture and safety guide.

## Development Checks

Before opening a PR, run:

```bash
python -m pytest -q
python examples/import_smoke.py
python examples/brain_first_qa_demo.py
python examples/live_readonly_trace_demo.py
python scripts/check_gbrain_compatibility_matrix.py
git diff --check
```

If a change touches the GBrain client, live compatibility smoke, or schema mutation contract, update the compatibility matrix or explicitly mark the refresh deferred in the PR checklist.

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