feat(agent): add online verification and governing-answer citations

Claim-bound online verification observations with URL provenance, exact
answer-basis references for citation-free governing-rule answers, and an
explicit operator identity handoff before source transfer. Bounds resumed
work by learning unit and refreshes pack manifest/contracts.

protocols/EVIDENCE.md

@@ -8,6 +8,8 @@ Record material assumptions and limitations as their own evidence-backed claim g
 
 Quote occurrence, semantic support, source reliability, model confidence and freshness are different assessments. A matching quote does not establish that the number, unit, population or qualifiers support the assertion. Record support rationale and the actual assessor. Routine same-agent assessment is allowed when policy permits; do not describe it as independent human review.
 
+Before marking a claim supported, check every clause against that claim's own attached excerpts. Material elsewhere in the paper, in a neighboring claim's citation, or outside the selected span does not complete its evidence. Split a compound claim or attach the additional exact passages when needed. For multi-column PDFs, follow each column's reading order rather than treating adjacent extracted lines as one sentence. Do not turn an inability to perform a test into an established cause of that inability.
+
 Keep conditions and disagreements. Similar wording or shared sources do not establish equivalence or independent corroboration. An AI-generated report is evidence of what that report says; its bibliography does not prove the underlying claims.
 
 Missing archives or unsupported extraction produce explicit unavailable evidence. Such drafts cannot be reported as accepted evidence-backed knowledge. Changed assertions, quotes or source revisions require renewed support checks. Interpretations cite their supporting notes and are labeled as interpretations.