arborist/tests/fixtures
russell@unturf.com 22a8071936
verify: strip wikitext from context before substring matching
Adds aborist/wikitext.py with to_base() — deterministic wikitext →
prose conversion via mwparserfromhell. Drops <ref>...</ref>,
[[File:...]], [[Image:...]], [[Category:...]] entirely; resolves
piped wikilinks to display text; collapses templates, formatting,
and HTML markup. extract_wikilinks() preserves the link graph for
the definition-cloud artifact (recoverable from any page on demand
without re-parsing wikitext at query time).

Wires to_base() into verify_quotes(). Without the strip, the
verifier compared the model's clean prose against [[Cloud Strife]],
[[Shinra Electric Power Company|Shinra]], etc. and falsely flagged
real source quotes as VISUAL. Concrete case from a make-query run:
'Cloud Strife, an unsociable mercenary who claims to be a former
1st Class member of Shinra's SOLDIER unit;' is verbatim in the
Final_Fantasy_VII article wikitext (modulo markup). With the strip
that quote now verifies; the genuine model hallucinations in the
same answer still flag honestly. Side-effect: 43% smaller context
size on average so less LLM token waste.

BASE_VERSION = 'wikitext-base-v1' is the algorithm pin. Bump when
the strip rules change. Soft-imported in verify.py so environments
without mwparserfromhell installed degrade gracefully (no strip,
same behavior as before this commit).

Build:
- pyproject.toml: new [wikitext] extras (mwparserfromhell>=0.6),
  pulled in by [dev]
- Makefile: chain-check / chain-check-shards targets — fast
  audit-chain integrity probe, counts dangling prev_event_hash
  references; 0 = chain intact

Tests:
- tests/test_wikitext.py: 31 tests (rules, idempotence, real-corpus
  fixture)
- tests/test_verify.py: 2 regression tests pinning the FF7 flip
  (Cloud Strife quote: VISUAL → STRICT after strip; genuine
  hallucination: stays VISUAL)
- tests/fixtures/ff7_characters_chunk0.wikitext: real chunk from a
  shard, used to validate the strip on actual Wikipedia content
2026-04-28 15:48:07 -04:00
..
ff7_characters_chunk0.wikitext verify: strip wikitext from context before substring matching 2026-04-28 15:48:07 -04:00