arena

Respond to a Codex bulk-read hook block by replacing an oversized full-file read with targeted inspection or bounded subagent delegation.

Use when asked to complete a task with Herdr, coordinate Herdr workers or panes, delegate work inside a Herdr session, or run a multi-agent Herdr workflow…

Review a bounded codebase area for architectural friction and propose owner-scoped interface improvements when explicitly requested.

Cache and refresh remote git repositories under the ~/.cache/checkouts host/org/repo layout when local source inspection or repeated reference work benefits…

Design or review public or shared API, CLI, and data contracts when callers depend on stable inputs, outputs, errors, or compatibility.

Investigate failures whose cause is unclear or whose fixes keep failing.

Reduce unresolved feature or workflow scope by questioning requirements, deleting unnecessary work, and deciding whether automation is justified.

Vet a perf measurement (limiter, tuning, limits, errors, repeatability, relevance, and whether the work happened) before you report or act on it.

Find the mistakes agents keep repeating in this repo and make each one impossible.

Design an auditable playbook when no narrower one fits: a large migration, an ambitious multi-part change, or work a human reviews after stepping away.

Sketch types, signatures, and module structure before code, then stay in the loop while implementation fills in.

Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe because of by running real code instead of…