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test(retrieval-gate): three fixtures make M06, M07 and M10 decide a delivery — row 7 14 of 14

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Row 7 left three mutants standing after v1.1 (11 of 14, bar 13): the passage
signal reading no body, the field signal weighing no title and no path, and a
flattened fusion (bm25.RRF_K = 10 000). Each switches off a mechanism the
default ranking runs, and each moved 0 ranks, because every synthetic concept
was short and opened with its own title -- none of the three ever decided a
delivery here.

Three bundles, one per mechanism, and one pinned set (set-mechanisms.json):

- PASSAGE: a long concept answered in one window of its body, against ten
  short concepts whose titles carry the question's words. Rank 1; with no
  body windows it falls out of k (class b).
- PATH: a concept named by its path alone, against ten decoys denser in the
  body. Rank 4 at k = 6; with no title/path weight it falls out of k.
- FUSION: gold 1st in the passage signal and 21st in the field signal, one
  decoy 10th and 11th (rank sum 19 < 20). At RRF_K = 60 the gold leads, and
  it keeps the lead through K = 180 (measured in steps of 10); flattened, the
  decoy wins k = 1.

Chose separate fixtures over one combined one because each fixture's comment
can then name the single mechanism it pins. Verified per question against all
14 mutants: no previously felled mutant is lost. src/ is untouched, MUTANT_BAR
and the roster are unchanged, the corpus pin moved with the corpus.

Gate: rows 1 and 6 go 10/10 -> 13/13, row 7 11/14 -> 14/14 GREEN, rows 2/3/4
unchanged, GATE RED: rows 5, 8. Suite: 2444 passed, 1 skipped (+3), measured
with FORCE_COLOR unset -- with FORCE_COLOR=3 in the environment Python 3.14
colours argparse help and test_each_arm_flag_carries_its_attribution fails,
independently of this change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Kjell Tore Guttormsen 2026-09-22 22:41:01 +02:00
commit e503f6abd7
Signed by: ktg
SSH key fingerprint: SHA256:JakMjO6FTBBzN0Bhfj9saOoEjaFxlSdYuZQQpM/lF9Q
5 changed files with 234 additions and 48 deletions
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37
README.md
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@ -84,13 +84,13 @@ here was measured; none of it is a plan.
`--no-assets` takes the image path out entirely.
- **Three of this repository's own gates are RED, and each red row is a stated
finding rather than a bug to be surprised by.** The retrieval gate is red on
rows 5, 7 and 8, the MCP gate on row 2, and the content accounting's judge
rows 5 and 8, the MCP gate on row 2, and the content accounting's judge
on rows 2, 3 and 6. For a user that means: no ranking change has yet been
registered against a held-out set (row 5), the real-corpus row is NOT RUN
without its private sets and so is red rather than green by omission
(row 8), three mechanical mutants of the BM25 ranking survive with 0 ranks
moved — the passage body, the title field weight and the fusion constant —
so the gate cannot yet tell those parts from their absence (row 7), MCP anchors and concept ids are different
without its private set and so is red rather than green by omission
(row 8) -- and when it IS run, its judge still requires a delivered excerpt
to be the whole concept's bytes, so an excerpt v1.1 cuts to its answering
passage counts as a miss even where it carries the citation. MCP anchors and concept ids are different
vocabularies so `okf_fetch` cannot be addressed with a set's anchor (row 2),
and the accounting still reports real losses on the reference corpus (rows 2,
3, 6). The rows and their numbers are under [Judge the
@ -1196,18 +1196,18 @@ set names a consumer's documents and this repository is public. **The corpus
is pinned the same way** (`SPECS_SHA256`): every row counts against those
documents, so moving them without moving the pin is exit 2.
**It is RED today, on rows 5, 7 and 8**, and each of those is a
**It is RED today, on rows 5 and 8**, and each of those is a
finding rather than a defect in the gate:
| row | what it asks | today |
|---|---|---|
| 1 | hit@payload, one fasit entry = one unit | 10 of 10 |
| 1 | hit@payload, one fasit entry = one unit | 13 of 13 |
| 2 | every miss carries exactly one class, each forced by its own fixture | 7 of 7 |
| 3 | the `rule` the payload prints for a withheld fasit is the true one | 5 of 5 |
| 4 | an uncovered question comes back marked, a covered one does not | 6 of 6 |
| 5 | a hold-out set, frozen and with its threshold written first | 0 of 1 |
| 6 | every delivery confirmed against the bundle's own bytes | 10 of 10 |
| 7 | mechanical mutants of the ranking and the cut, felled | 11 of 14 |
| 6 | every delivery confirmed against the bundle's own bytes | 13 of 13 |
| 7 | mechanical mutants of the ranking and the cut, felled | 14 of 14 |
| 8 | the real set, from path + sha256 | 0 of 1 set, NOT RUN without `--real` |
**The public rows run on invented material only** (operator decision
@ -1230,13 +1230,18 @@ delivered excerpt answers — facts, no verdict, and the one bar is the gate's
own `UNANSWERED_BAR = 2/3` — 3 of 6 to 6 of 6.
Row 7's mutants patch the code the DEFAULT ranking runs (BM25 since v1.1),
and it reports three survivors with what they moved rather than with a shrug:
the passage signal reading no body, the field signal weighing no title and no
path, and a flattened fusion (`bm25.RRF_K`) each moved **0 ranks and 0
deliveries** on these fixtures. Each has a mechanism: the field signal still
reads every body, every synthetic body opens with its own title as a heading,
and over two signals `K` only reorders a concept whose two ranks lie far apart,
which no fixture holds.
and it fells all 14. Until 2026-09-22 three survived with **0 ranks and 0
deliveries** moved -- the passage signal reading no body, the field signal
weighing no title and no path, and a flattened fusion (`bm25.RRF_K`) -- because
every synthetic concept was short and opened with its own title, so none of the
three ever decided a delivery. Three fixtures now make each one decide one
(`set-mechanisms.json`): a long concept answered in one window of its body
against short concepts whose titles carry the question's words; a concept named
by its path alone against decoys denser in the body; and a concept first in one
signal and 21st in the other against a decoy 10th and 11th, which a flattened
fusion ranks first because only the rank sum then counts. Each fixture is
delivered at the shipped defaults and falls out of `k` with its own mechanism
switched off; `src/` did not change.
Row 8 is never green by leaving something out: it requires every named set and
is NOT RUN until it has them — one set of three used to read `6 of 6 GREEN`.