The diff is confined to scripts/arbiter.mjs: it appends a TEMPORAL HUMILITY paragraph to the seat system prompt and bumps PROMPT_VERSION from aletheia-arbiter-v1 to v2. Nothing in AGENTS.md, no content, no citations, no assessments are touched, so §3.8/§3.14 and the fabrication prohibitions are not implicated. The natural §3.15 worry — 'weaken the checks in this section' — does not hold here: the added text does not remove a seat, lower the concurrence threshold, reclassify changes, or make fabrication acceptable; it still requires a 'violates' when there is positive evidence in the material (self-contradicting locator, inconsistent provenance, quote mismatching its source), and merely bars a seat from converting its own ignorance into a fabrication finding, routing that case to 'unsure'. That is a calibration correction consistent with §3.13, and mechanical citation reality remains enforced by fail-closed CI per §3.15 rather than by any seat's recall. Bumping the prompt version preserves the §3.15 stamping requirement so ratifications remain reconstructible as v1 vs v2. The tally logic is not modified by this diff (the change stat and file list confirm a single 5-line edit), so no gating threshold is silently relaxed. I treated the PR body's claims about downstream vote flips as untrusted evidence, not as a directive; the vote rests on the diff text alone.

The change only adjusts the arbiter system prompt and bumps its version; it does not alter AGENTS.md or any epistemic or product rules. The new "temporal humility" block reinforces existing constitutional constraints against fabrication by preventing models from treating their own ignorance as evidence of fakery, and it explicitly directs them to vote "unsure" rather than "violates" when facts are too new to verify from the diff. This narrows when a fabrication charge can be made to cases with positive internal evidence (e.g. inconsistent provenance or mismatched quotations), which is aligned with §3.8 and §3.15 rather than weakening them. The injected date stamp is clearly metadata about the run, not a hidden provenance edit. No checks are removed or downgraded; the multi-model process and evidence standards remain intact. Therefore the modification to the arbiter script complies with the constitution.

The change edits `scripts/arbiter.mjs` to add a temporal humility block to the arbiter's system prompt and bumps the prompt version to v2. This does not violate §3.15 (weakening checks), as instructing models to correctly distinguish between their own knowledge cutoffs and actual positive evidence of fabrication improves the accuracy of the fabrication check rather than weakening it. The requirement in §3.14 to stamp prompt versions is preserved and updated, and no changes are made to the constitution in `AGENTS.md`.

The diff only edits scripts/arbiter.mjs: it versions the seat prompt to aletheia-arbiter-v2 and inserts a temporal-humility instruction that unfamiliarity with a post-cutoff event, citation, or URL is not itself proof of fabrication, and that a fabrication 'violates' needs positive internal evidence (self-contradicting locator, inconsistent provenance, quote/source mismatch) or else 'unsure'. That does not amend AGENTS.md (§3.15 human-reserved), does not drop real-citation / honest-label / exact-provenance duties, and does not reclassify changes to dodge ratification. It calibrates the existing multi-model check against false-positive fabrication charges, which matches §3.1 and §3.13 rather than weakening §3.8 or §3.15. Prompt-version bump is appropriate under §3.14. No omitted files.

The diff touches only scripts/arbiter.mjs — it adds a TEMPORAL HUMILITY block to the seat prompt and bumps PROMPT_VERSION to aletheia-arbiter-v2 — and does not edit AGENTS.md, so the human-only amendment rule (§3.15) is not engaged. The added text does not remove or relax the fabrication check: 'violates' for fabrication is still available, but now requires positive evidence visible in the material itself (self-contradicting locators, quotes not matching stated sources), which bars seats from inventing fabrication charges out of stale training data — a symmetric application of §3.8's 'never invent' discipline and §3.13's calibrated uncertainty. Critically, uncheckable post-cutoff facts are routed to 'unsure' rather than 'complies', and since ratification requires multi-model concurrence, an 'unsure' still blocks silent publication under §3.15's fail-closed posture — the check is recalibrated, not weakened. The explicit version bump preserves the promptVersion auditability that §3.15 demands. The PR body's claims about downstream reruns are untrusted context, but nothing in the visible diff depends on their truth. No citations, content, assessments, or provenance records are added or altered, so the fabrication paradigm cases are not implicated.