feat(codex-fleet): halve worker pool default + cap Node MCP children + idle worker auto-exit#195
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NagyVikt merged 1 commit intoMay 18, 2026
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…+ idle worker auto-exit
Three changes, all in scripts/codex-fleet/, addressing the ~10 GB
resident memory floor observed when the fleet is up (16 codex CLIs +
258 node helpers; each codex CLI holds 200-400 MB of native heap that
does not shrink while idle).
codex-fleet-2.sh
- New WORKER_COUNT env (default 4, was hardcoded 8). The
RESERVE_ACCOUNTS array is unchanged as the upper bound; spawn loop
iterates 0..WORKER_COUNT-1. Bump back via WORKER_COUNT=8 when a
heavy plan needs more parallel lanes.
- worker_cmd_for() now exports NODE_OPTIONS=--max-old-space-size=400
so any Node MCP-server child codex spawns is capped. codex itself
is native; this only affects Node helpers.
worker-prompt.md
- Added empty_streak counter to the worker loop. After
IDLE_EXIT_THRESHOLD (default 5) consecutive empty
task_ready_for_agent polls (~5 min idle), the worker posts a
Colony note and exits 0. Supervisor respawns it when Colony
reports new claimable work. Override per-pane via
IDLE_EXIT_THRESHOLD=0.
Expected impact
- workers at bringup: 8 → 4
- idle floor when plan exhausted: ~2 GB → ~0
- active-work peak: ~10 GB → ~5 GB
- node MCP child heap cap: unbounded → 400 MB
To activate, tear down + bring up the fleet:
bash scripts/codex-fleet/down.sh
bash scripts/codex-fleet/full-bringup.sh ...
NagyVikt
deleted the
agent/claude/halve-worker-pool-heap-cap-idle-worker-e-2026-05-18-14-38
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