2026-07-26 12:29:06 +02:00
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# rein-openweights
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An agentic tool-use harness that drives **current open-weight models via
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2026-07-26 13:37:09 +02:00
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OpenRouter**, as an alternative to the frontier-model-vendor harnesses
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(Claude Code, Grok CLI, Codex/GPT CLI).
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2026-07-26 12:29:06 +02:00
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Part of the glas-harness "rein" family — see
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2026-07-26 13:37:09 +02:00
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[glas-harness ADR-001](../glas-harness/docs/adr/ADR-001-rein-harness-family.md),
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[ADR-002](../glas-harness/docs/adr/ADR-002-credential-brokering-and-composable-reins.md)
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(credential ownership), and this repo's
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[workplans/REIN-OW-WP-0001](workplans/REIN-OW-WP-0001-bootstrap.md).
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Uses its own minimal OpenRouter client (`src/rein_openweights/openrouter_client.py`),
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not `llm-connect`'s `OpenRouterAdapter` — that adapter's `execute_prompt(prompt: str,
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config)` takes a single prompt string and never surfaces `message.tool_calls`, so it
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can't drive a multi-turn tool-calling loop without a breaking change to llm-connect's
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frozen Core ABC. `llm-connect` stays an optional dependency (see `pyproject.toml`),
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not load-bearing for the base loop.
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2026-07-26 12:29:06 +02:00
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Not yet pushed to Forgejo — local scaffold only.
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2026-07-26 13:37:09 +02:00
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## Usage
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```bash
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python3 -m venv .venv && source .venv/bin/activate
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pip install -e .
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# Credential: either export OPENROUTER_API_KEY directly, or set
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# REIN_OPENWEIGHTS_APPROLE_DIR / REIN_OPENWEIGHTS_OPENROUTER_KV_PATH for
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# OpenBao-based acquisition (see src/rein_openweights/credentials.py).
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export OPENROUTER_API_KEY=sk-...
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rein-openweights run --task-file examples/task-hello-sandbox.json --no-hub
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```
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Tests: `python3 -m pytest tests/ -q` (26 tests, no network/OpenBao calls —
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everything mocked at the `httpx`/`bao` subprocess boundary).
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