The phrase-pattern retrieval route (commit 1b8677d) closed the
RETRIEVAL side of reference-frame failure; this ticket closes
the ANSWER side.
New module aborist/qa/frame.py:
FrameDetection dataclass (frame_kind, reference_title,
reference_uri, confidence). Sidecar — never enters cache_key
or governance_policy_hash.
detect_frame(question, sources, phrase_match_roots) — heuristic
detector. Reference-frame classification fires when:
(a) phrase route surfaced at least one source, AND
(b) at least one phrase-matched source is a reference work,
determined by:
- title parenthetical disambig (`(novel)` / `(film)` /
`(play)` / `(franchise)` / etc.), OR
- body sample contains ≥3 DISTINCT fiction markers
(novel / published / protagonist / plot / ...).
Distinct-marker count keeps the heuristic robust against a
history article saying "novel approach" twice.
aborist/qa/query.py:
Calls detect_frame for lattice modes only. Body sample uses the
ARTICLE LEAD (chunk_idx=0, post-wikitext-strip) — fiction
markers cluster in the lead on Wikipedia, not in plot chunks
that may have been query-relevance-ranked higher.
New policy field claim_lattice_polarity_preamble injected as a
user-role message before the grounding_reminder when
frame_kind == "reference". Format-string with
{reference_title} placeholder.
Result dict carries frame_detection (kind / title / uri /
confidence) for renderer + bench consumption.
aborist/cli.py:
Renderer adds a `reference frame: <title>` line when
frame_detection.kind == "reference". Skipped for literal /
no-phrase-route / ambiguous rows.
Live verification — Orwell case:
PRE : "The text does not directly state that Oceania has always
been at war with East Asia."
POST : "In George Orwell's dystopian novel Nineteen Eighty-Four,
the nation of Oceania is always at war with Eastasia,
but this is a result of propaganda and doublethink, not
actual historical continuity. The war with Eastasia is
a fabricated conflict to maintain control..."
Multi-frame compilation: distinguishes propaganda claim from
fictional-actual continuity, exactly the polarity contract from
the ticket §2 abstraction.
Literal queries (capital of france) unchanged — polarity preamble
only injects when frame_kind classifies as "reference".
22 new tests (19 in test_frame.py + 3 in test_cli_render.py).
Full suite: 734 passed (was 712, +22).
Directive D3 status: ½ → ✓. Ticket #000002 closed.
All seven structural directives now ✓:
D1, D2, D5 (were ✓);
D3 #000002, D4 #000001, D6 #000003, D7 #000005 (closed in this
series).
