hook-bridge-runner 0.1.0

The hook-bridge runner: translates a Harness's native hook protocol to and from the generic Contract, running each Hook as a subprocess.

hook-bridge

The runner: the CLI a Harness actually invokes. It sits between a Harness and a Hook — see CONTEXT.md and ADR-0003 for how bytes cross the process edge.

hook-bridge --harness <harness> <hook>

• Reads the harness's native event JSON from stdin.
• Peeks its native event name and selects the Codec registered for (harness, native event).
• decodes it into the generic wire Context JSON and spawns the Hook (uv run <hook>), writing that JSON to its stdin — exactly what the SDK's hook.run() already reads.
• Reads the generic wire Verdict JSON the Hook printed to stdout, encodes it into the harness's native response body + exit code, and writes both back.

v1 ships only the stub harness Adapter, which exists to prove this plumbing end-to-end. The real claude-code and codex Adapters are sibling work (#12).

Dependency-free by design (#7: no runner→SDK dependency) — the runner works in plain JSON-shaped dicts, never the SDK's typed Context/Verdict.