WFGY/ProblemMap/GlobalFixMap/MemoryLongContext/state-fork.md
2025-09-05 11:22:48 +08:00

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State Fork — Guardrails and Fix Pattern

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You are in a sub-page of MemoryLongContext.
To reorient, go back here:

Think of this page as a desk within a ward.
If you need the full triage and all prescriptions, return to the Emergency Room lobby.

When the same task_id is held in multiple tabs, agents, or sessions, their memories may diverge.
This creates two or more competing state branches, producing unstable or contradictory answers.


Symptoms

  • Two browser tabs answer the same task differently.
  • Multi-agent orchestration produces conflicting citations.
  • Session resumes but history appears rewritten or selectively dropped.
  • Answers alternate between two incompatible interpretations.
  • Logs show inconsistent mem_rev or mem_hash values for the same task_id.

Root causes

  • Concurrent writes to the same memory namespace.
  • Missing checks for mem_rev version control.
  • Agents refreshing at different times and overwriting buffers.
  • Weak schema: task identity not fenced by {task_id, mem_rev, mem_hash}.
  • No conflict resolution logic when branches emerge.

Fix in 60 seconds

  1. Version control memory

    • Every write stamped with {task_id, mem_rev, mem_hash}.
    • Reject writes if mem_rev < server mem_rev.
    • Require conflict resolution if two branches exist.
  2. Isolate namespaces

    • Each agent/tab gets unique memory slot.
    • If collaboration required, merge through a coordinator agent.
  3. Detect divergence early

    • Measure ΔS(answerA, answerB) across tabs.
    • If ΔS ≤ 0.40 but snippets differ, state fork detected.
  4. Resolve fork

    • Run reconciliation: pick majority snippet set, or force human confirm.
    • Hash merged state and issue new {mem_rev, mem_hash}.
  5. Trace schema

    • Require all claims to cite snippet ids.
    • Reject orphan claims without snippet anchors.

Copy-paste diagnostic prompt

You have TXTOS and the WFGY Problem Map.

Task: Detect and repair state forks across tabs or agents.

Protocol:
1. Print {task_id, mem_rev, mem_hash}.
2. If two active branches share task_id with different mem_rev → flag fork.
3. Compare ΔS(answerA, answerB).
   - If ΔS ≤ 0.40 but snippets differ → fork confirmed.
4. Apply resolution:
   - Choose majority snippet set or request human input.
   - Issue new {mem_rev, mem_hash}.
5. Report ΔS, λ states, and resolution path.

Acceptance targets

  • No conflicting branches for the same task_id.
  • All writes validated against server-side mem_rev.
  • ΔS(answerA, answerB) ≥ 0.60 after resolution.
  • λ remains convergent across three paraphrases.
  • Audit log records merge or reject actions explicitly.

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