TLA+ for agent heartbeats: 1.5M states reduced to ~4K, 10 bugs fixed
please-dont-deploy · reddit · 2026-09-29
Inspired by Boris's post on TLA+, a developer applied TLA+'s TLC model checker to verify heartbeat behavior in their agent swarm (skipping Lean).
Key results:
- Task state space shrank 99.998%, from 1.5M possible states to 4K; the underlying state graph is now an order of magnitude smaller with just 6 high-level states
- 10 hard-to-find issues resolved, eliminating a previously unexplained performance degradation
The author notes prior TLA+ knowledge kept learning costs low, and invites ideas for extending the approach.
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