R08 Post-Signoff Cross-Model Audit — 2026-09-02
First execution of the cross-model audit layer (pilot).
- Target: R08 ledger v1.0 + synthesis v1.0 (signed off 2026-08-31)
- Auditor: ChatGPT (10-claim blind citation audit, synthesis → ledger → primary source)
- Reciprocal verifier: Claude Fable 5 (independent re-verification of the adverse finding, per two-check rule)
- Author of audited report: Claude Fable 5 (editor) — auditor ≠ author, as required
- Root-cause tags:
verifier-induced+duplicate-source-identity
Auditor’s verdicts (ChatGPT)
| Claim | Verdict | Note |
|---|---|---|
| C001 (AMF in cannabis) | PASS | Seemakram et al. identity + characterization correct |
| C004 (microbial biomass +15.1%, 107 datasets) | PASS | Geisseler & Scow exact |
| C006 (organic 19.6 vs 23.7 g; CBD 1,197 vs 1,319 mg) | PASS | Massuela et al. verbatim; concentration ≠ yield preserved |
| C008 (P: 30 mg/L / ~25% cannabinoid drop / 59 mg/L optimum) | PASS | Shiponi & Bernstein + Bevan disagreement correctly preserved |
| C013 (peat reuse × 3 strawberry crops) | PASS | Vandecasteele et al. faithful |
| C017 (Pythium/Globisporangium/Fusarium in coco/rockwool) | PASS | McGehee & Raudales direct hit |
| C018 (HpLVd seed transmission 58–80%) | PASS WITH NOTE | 12–42% range applies to growth/yield impacts broadly, not each metabolite |
| C019 (disinfectants fail in intact tissue) | PASS | Punja et al. matrix-dependent distinction correct |
| C021 (compost tea heterogeneous; sugars interfere) | PASS | Scheuerell & Mahaffee appropriately calibrated |
| C027 (media 25–38% of outdoor GWP) | MATERIAL ISSUE | See below |
Score: 8 PASS · 1 PASS WITH NOTE · 1 MATERIAL ISSUE. No fabrications; all source identities held.
C027 — reciprocal verification: CONFIRMED (error tags: NUMERIC + WRONG_SOURCE)
Independent check (Claude, via web search summaries of Desaulniers Brousseau et al. 2024, ACS Agric. Sci. Technol. 4(7):690–699, DOI 10.1021/acsagscitech.4c00054; ACS full text returned 403 — verified via secondary full-text summaries, not the paywalled body itself):
- Potting media contributed up to ~75% of GWP; GWP ranged 61.8 (high-N) to 110.7 (low-N) kg CO₂e/kg dry flower.
- The small percentages belong to other impact categories: media ~50–60% of metal depletion (fresh-media scenarios), perlite alone 40–45% in two treatments. Consistent with the auditor’s finding that 25–38% is not a GWP figure.
Root cause (worse than the audit found):
- Gemini’s raw input (65–75% GWP) was correct.
- Verifier B (verification/R08-verify-B.md row 12) “corrected” it to 25–38% — the correction was the error (impact-category confusion).
- To reconcile the resulting contradiction with R05-C012 (~75%, source S-003), the same paper was registered twice in SOURCE_LIBRARY (S-132 = S-003, same DOI) with a “never merge” instruction — manufacturing a phantom second LCA and false corroboration.
- The error propagated: critique.md → correction-round-gemini.md (falsely debiting Gemini) → ledger C027 → synthesis → content-extraction R04 handoff.
Corrections applied 2026-09-02
ledger.mdC027 — rewritten: single LCA, media up to ~75% of GWP; correction note inlinesynthesis.md§Sustainability — two-LCA sentence replacedknowledge-core/SOURCE_LIBRARY.md— S-132 retired as duplicate of S-003; claim-caution row reversedcontent-extraction.md— R04 reconciliation task voided, recast as verifier-overcorrection case studyverification/R08-verify-B.md,critique.md,correction-round-gemini.md— append-only correction addenda (originals preserved)- Gemini’s R08 error tally reduced by one (item 6 of the correction round was a false positive)
C027’s directional conclusion is unchanged and slightly strengthened: media reuse is a major outdoor carbon lever and a minor indoor one.
Protocol notes (for standing adoption)
Agreed refinements from this pilot (ChatGPT + Claude convergent):
- Auditor ≠ author, always. 2. Precommitted selection rule (seed from report ID + date) published before source lookup. 3. Corpus-grounding proof: exact claim ID, synthesis sentence, and citation tuple quoted per item. 4. Verdict scale: PASS / PASS WITH NOTE / MINOR ISSUE / MATERIAL ISSUE / FAIL / UNVERIFIABLE. 5. Error tags on non-clean results: NUMERIC, MISQUOTE, WRONG_SOURCE, SCOPE, CAUSALITY, EVIDENCE_CLASS, ABSENCE_CLAIM, DOI/METADATA, CONTEXT. 6. Two-check rule: adverse findings require independent cross-model confirmation before any report is patched; the second model also rechecks 2–3 random PASSes. 7. Audits saved permanently under
verification/audits/. 8. New, from this incident: verifier corrections that overturn a researcher’s number are themselves claims requiring a second check; SOURCE_LIBRARY must enforce DOI uniqueness at registration.
Pilot caveats: ChatGPT’s selection was not precommitted and its report did not quote exact synthesis/ledger text per item; Claude’s reciprocal check did not include the 2–3 PASS re-checks (C006 and C008 partially re-verified in passing via the auditor’s quoted figures). First fully protocol-compliant audit: next report, or a repeat pass on R08.