Retrieval Traceability

March 6, 2026 · View on GitHub

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Citations that look right can still hide silent drift.
This guardrail defines how to enforce traceability schemas so that every claim links back to a stable, reproducible snippet.


When to use

  • Answers cite a source but the snippet cannot be located.
  • Two runs over the same corpus produce different citations.
  • A fact is quoted but not aligned to any section anchor.
  • Long-context threads degrade and snippets blur into paraphrase.
  • Multi-agent systems pass partial context and lose attribution.

Root causes

  • Orphan citations: snippet ID missing or fabricated.
  • Boundary drift: citation spans cross section joins.
  • Silent truncation: tokens dropped at cut points.
  • Cache overwrite: citation schema lost after session reload.
  • Free-text cites: URLs or titles given without offsets.

Core acceptance targets

  • Each claim must include snippet_id, section_id, start_line, end_line, source_url.
  • ΔS(question, retrieved) ≤ 0.45 overall.
  • Joins between snippets ≤ 0.50 ΔS.
  • λ convergent across 3 paraphrases.
  • Audit trail reproducible from log alone.

Structural fixes

  • Snippet table schema
    Require {snippet_id | section_id | start_line | end_line | citation}.

  • Fence joins
    Split at section boundaries. Reject cross-section reuse.

  • Trace log
    Store {ΔS, λ_state, mem_rev, mem_hash} per step.

  • Contract lock
    Apply Data Contracts for payload validation.


Fix in 60 seconds

  1. Enforce snippet table with unique IDs and line ranges.
  2. Verify ΔS across each join ≤ 0.50.
  3. Echo λ states at retrieval, assembly, reasoning.
  4. Reject orphan claims (no snippet_id).
  5. Log trail so same inputs → same citations.

Copy-paste prompt


You have TXT OS and the WFGY Problem Map.

Goal: Ensure every claim links to a reproducible snippet.

Protocol:

1. Build a Snippet Table {snippet\_id, section\_id, start\_line, end\_line, citation}.
2. Require cite-then-answer.
3. Forbid cross-section reuse.
4. If a claim has no snippet\_id, stop and request citation.
5. Report ΔS(question,retrieved), joins ΔS, and λ states.
6. Store {mem\_rev, mem\_hash, task\_id} for audit trail.
7. Answer only with snippets present in the table.


Common failure signals

  • Citations alternate across runs → missing trace schema.
  • URL without offsets → orphan citation.
  • Facts cited but no snippet_id → schema lock failed.
  • Session reload erases citations → ghost cache in memory.

🔗 Quick-Start Downloads (60 sec)

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要直接開始 data-contracts.md 嗎?