ALEF-PAT-024

tool-desc-cache-break

dispatch × drift · severity 7 · confidence 0.54

tool[0].description includes per-environment dynamic content (sub-agent list, plugin list); ANY change invalidates cache prefix for everything after

diagnosed in the wild

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healed by ALEF

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cited in posts

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observable signature

{
  "behavior": "tool[0].description differs across resumes despite same workspace"
}

verified instances (2) — from the catalog

2026-05-18T13:30anthropics/claude-code#49038@Ilya0527
2026-05-19T14:52Ilya0527/Alef (internal adversarial finding)@adversarial-self_attacker

fix archetypes

static-description-dynamic-systemcost: medium
move per-environment list out of tool description into a separate system block that lives below cache breakpoint

compounds with

ALEF-PAT-023

cite as

# In a PR description / issue / RFC:
fixes pattern ALEF-PAT-024 (tool-desc-cache-break)
ref: https://n50.io/patterns/024

# Machine query:
GET https://n50.io/api/patterns/024

# Scan your repo for this pattern:
npx @alef-prime/audit-agent-system . --pattern=024