Small helpers for building Codex hook guards against upstream hook schemas.
Project description
codex-hookkit
Small helpers for building Codex hook guards against upstream Codex hook schemas.
This package intentionally starts small:
- vendored snapshots of
openai/codexgenerated hook schemas - stdin parsing for Codex hook payloads
- JSON-schema validation helpers
- allow / deny output builders
- a minimal command guard CLI
Install
uv add codex-hookkit
CLI
Use codex-hookkit guard as a Codex hook command. It reads one hook payload from
stdin, validates it against the vendored upstream schema, and exits:
0for allowed payloads2with a stderr reason for denied payloads
codex-hookkit guard --schema pre-tool-use
Python API
from codex_hookkit import HookPayload, SecretPolicy, deny
payload = HookPayload.from_stdin(schema="pre-tool-use")
decision = SecretPolicy.default().evaluate(payload)
if decision.denied:
raise SystemExit(deny.stderr_exit(decision.reason))
JSON output helpers are also available for Codex hook contracts that consume structured output.
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