Parallel review subagents each need a fresh
showcase-langgraph-python build to screenshot. Running
`dev-local.sh up langgraph-python` N times in parallel serializes on
Docker and wastes time rebuilding identical source.
`scripts/agent-notes/rebuild-coord.sh` aligns rebuild attempts to a
30-second clock tick with 0-5s jitter. First agent on a tick acquires
a `mkdir`-based lock, rebuilds, and writes a per-tick done marker at
`/tmp/showcase-rebuild.done-<tick>`. Peers on the same tick skip their
own build and wait up to 30s for that marker. If no marker appears,
they retry the next tick (up to 3 ticks).
Agents call `bash scripts/agent-notes/rebuild-coord.sh` instead of
`./scripts/dev-local.sh up langgraph-python` when they need the live
container refreshed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Atai Barkai