fix(consume): the compound-word miss is a degenerate signal's tie-break, behind a flag

The consumer's question about `vann- og frostsikring` in a subsea tunnel
delivered 0 of the 16 concepts covering it, best of them at fused rank 14.
Reproduced with the denominator, then decomposed per signal before anything
was built.

It is not a matcher miss. `normalise("vann- og frostsikring")` already returns
`('vann', 'frostsikring')` on HEAD, the prefix rule already bridges the
inflections, and the best covering concept already answers 7 of 7 question
tokens -- more than any delivered one. A tokeniser rule had nothing to widen.

It is the fusion, but not a weight. RRF ranks every concept in every signal,
including a signal that scored them all the same, and the declared
`(-score, concept_id)` tie-break then orders that group by id. On N500 the
document prior has TWO distinct values over 270 concepts, so the third signal
contributed alphabetical UUID order spread from 1/61 to 1/329 -- enough to put
a concept leading the body signal behind concepts sharing only `tunnel` and
`vann`.

`--tie-shared-rank` lets concepts a signal scores equally share that group's
first rank. The miss closes: best covering 14 -> 3, 2 of 16 delivered. OFF BY
DEFAULT, by the order's own rule: the three requirement lookups hold at rank 1
and the K2 digest holds, but hit@8 over the six published questions falls 5 of
6 to 4 of 6. Decomposed rather than guessed -- K2's prior is coarse (6 values
over 39 documents) rather than degenerate, and one gold sat early in its tie
group. That benefit was never a measurement, but it is a published row.

`--withheld-titles` gives each withheld entry the concept's title, so a reader
can see WHAT was withheld without reading the bundle. 11 lines of code; the
bytes are why it is off. It grows an N500 payload 37.9 % and takes the
629-concept K2 bundle's BOOKKEEPING to 122 704 B -- past the 120 000-byte limit
itself -- which would falsify the breaking point published in the tracked
`skills/okf-consume/SKILL.md` on the day it shipped.

Defaults measured, not asserted: six payload digests built from a frozen
`ff79cfa` (`git archive`, `__file__` checked) and from this tree with both
flags omitted are 6 of 6 identical, and `okf_skill.py` output is identical
apart from the paths each copy writes about itself. Contract checker exit 0 on
eight payloads, both values.

One known-positive did not reproduce and is reported rather than matched: the
order's S7 literal `2ae46f68`/169 573 B is stale by three excerpt-form commits;
HEAD measures `c759a657`/171 614 B.

Suite 1388 -> 1397. Report: docs/2026-09-08-rangeringsbom-sammensatte-ord.md

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CLAUDE.md

@@ -314,7 +314,7 @@ and fixtures, never code.
   measurement behind it, including the control that FAILED, is
   `docs/2026-09-07-okf-konsumskill-maaling.md`. **The ranking is this
   repository's own choice** — the contract binds a payload, not a retrieval
-  algorithm (§ 10) — and it has THREE optional widenings, all **off by default**
+  algorithm (§ 10) — and it has FOUR optional widenings, all **off by default**
   and all keeping the default payload byte-identical. `--cost-vocabulary`: a
   declared cost/price/quantity vocabulary family that bridges a question and a
   document naming money with different words, gated on the QUESTION carrying
@@ -344,6 +344,29 @@ and fixtures, never code.
   read as 135-of-446 common, and RRF consumes RANKS, so no weighting inside a
   signal can move a gold that already leads it.
   `docs/2026-09-08-sjeldenhetsvekt.md`.
+  `--tie-shared-rank` is the fourth, and it is a correction to the TIE-BREAK
+  rather than a weight: RRF ranks every concept in every signal, including a
+  signal that scored them all the same, and the declared `(-score, concept_id)`
+  tie-break then orders that group by id. Measured on N500, whose document
+  prior has **two** distinct values over 270 concepts, that signal contributed
+  alphabetical UUID order and put a concept answering 7 of 7 question tokens at
+  fused rank 14 — outside the cut — behind concepts sharing only `tunnel` and
+  `vann`. Under shared ranks it is rank 3 and 2 of the 16 covering concepts are
+  delivered. Off by default BY MEASUREMENT: the three requirement lookups hold
+  at rank 1 and the K2 digest holds, but hit@8 over the six published questions
+  falls 5 of 6 to 4 of 6, because K2's prior is coarse rather than degenerate
+  (6 values over 39 documents) and one gold sat early in its tie group — a
+  benefit that was never a measurement, but a published row all the same.
+  `docs/2026-09-08-rangeringsbom-sammensatte-ord.md`.
+  A FIFTH flag is not a ranking widening and is listed apart: `--withheld-titles`
+  gives each `withheld` entry the concept's `title`, so a reader can see WHAT
+  was withheld without reading the bundle (§ 2.2 forbids going to look). The
+  code is 11 lines; the bytes are the reason it is off. Measured, it grows an
+  N500 payload 37.9 % and takes the 629-concept K2 bundle's BOOKKEEPING to
+  122 704 B — past the 120 000-byte limit itself — which would make the
+  breaking point published in the tracked `skills/okf-consume/SKILL.md`
+  ("~75 KB at 629 concepts … at roughly 8 000 concepts") false on the day it
+  shipped.
 
 ## Workflow