Module agents 

install: write the testing contract into the repository’s agent context file (AGENTS.md) as a marker-delimited, hash-versioned block — the beads (bd init) pattern. Idempotent: re-running refreshes the owned region and touches nothing outside it.

Functions

install

Upsert the managed block into the file at path: create the file when absent, append when no marker is present, otherwise replace only the region between the markers. A current block is a byte-identical no-op. A begin marker with no matching end marker is a damaged block — install refuses it rather than appending and orphaning the marker.