Bootstrap rein-openweights: minimal agentic loop over OpenRouter (REIN-OW-WP-0001)

Implements T01-T04:
- tools.py: green-commit-only-equivalent tool surface (read/write/edit/
  glob/grep + git status/diff/log/add+commit), path-traversal guarded.
- openrouter_client.py: own minimal chat-completions client — llm-connect's
  OpenRouterAdapter takes a single prompt string and never surfaces
  tool_calls, so it can't drive a multi-turn tool-calling loop without a
  breaking change to its frozen Core ABC. llm-connect stays an optional
  dependency (pyproject.toml), not load-bearing.
- loop.py: plan -> tool call -> observe -> repeat, budget- and
  turn-bounded, tool errors reported back to the model instead of
  crashing the loop.
- credentials.py: own OpenBao AppRole/ambient-token acquisition, per
  glas-harness ADR-002 (Option B) — glas-harness does not broker this.
- runner.py/hub.py: commit-verified success criterion + State Hub
  progress/token reporting, mirroring rein-aharness's model.

26 tests, all mocked at the httpx/subprocess boundary — no real
OpenRouter or OpenBao calls made. T05 (Forgejo repo creation) stays
open, deferred to the operator.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,34 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "rein-openweights"
+version = "0.1.0"
+description = "Agentic tool-use harness driving current open-weight models via OpenRouter"
+requires-python = ">=3.11"
+dependencies = [
+    "httpx>=0.27",
+]
+
+[project.scripts]
+rein-openweights = "rein_openweights.cli:main"
+
+[tool.uv.sources]
+llm-connect = { path = "../llm-connect", editable = true }
+
+[project.optional-dependencies]
+# llm-connect stays optional per glas-harness ADR-002: the base agentic
+# loop uses its own OpenRouter client and budget tracker (see
+# openrouter_client.py, budget.py) so it never becomes load-bearing.
+# This extra is only for future opt-in use of llm-connect's diagnostics/
+# replay/structured-JSON helpers.
+llm-connect = ["llm-connect"]
+dev = ["pytest>=8"]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/rein_openweights"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+pythonpath = ["src"]