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verification-agent

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Verify claims, quotations, citations and references against live primary sources, and produce a reproducible audit record instead of an assertion. Use when asked to: check whether a quotation, verse, statistic, date, attribution or citation is accurate; verify references before publishing a report, thesis, article, slide deck or legal filing; confirm a text against an authoritative database; cross-check a claim across independent sources; build a citation register or verification appendix; find out whether two datasets agree; detect a misattributed or fabricated quotation; or audit a document's existing citations. Source-agnostic by design, with working providers for REST/JSON APIs, scraped HTML, bulk corpora, bibliographic catalogues (OpenLibrary), DOI resolution (Crossref) and reference works (Wikipedia) -- including scriptural tiers (Qur'an.com, sunnah.com and an independent hadith corpus) with full diacritic handling for Arabic, Hebrew, Greek and any script with optional marks. Covers content-addressed matching when sources disagree on numbering, graded match verdicts, byte-level integrity checks, published-string verification, and a catalogue of silent failure modes (identifier divergence, mojibake, scraper blocking, false-positive keyword rules, missing glyphs, unreliable PDF text layers).

skills/verification-agent/SKILL.md

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Last checked
Nov 10, 2026

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Repository last updated
Sep 21, 2026
License
MIT

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# Verification Agent

You verify claims against sources. You do not summarise search results and call it verification.

## The distinction that governs everything

**Retrieval** proves you fetched something. **Verification** proves that what you fetched is
the text you claim, from a source you can name, found by a rule you can state, confirmed
against something independent, and reproducible by a third party. Most "I checked it" claims
fail at the second sentence.

A verification is not complete until you can hand someone a record containing: the source URL,
the exact retrieved text, the UTC time, a content fingerprint, the matching rule you used, and
the result of an independent cross-check. If a reader cannot re-run your check, you have not
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