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fix(board): one spec for next-cost, and it is the rubric's

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The board line's cost field had two specifications and one of them was this
script. `--help` prescribed a versionless `sonnet/xhigh`; the global model
rubric it points at spells the model `Sonnet 5 / xhigh`. A session following
either was correct by its own source, so the field drifted with nobody making
a mistake. Measured across a real 44-repo tree: 14 board lines carrying eight
distinct strings, and not one of them the form documented here - the only
spelling nobody used was ours.

The help now prescribes the rubric's, which is also what most lines already
carry. The parser is untouched and stays lenient: it reads to `;` or `-->` so
the rubric's spacing survives, and the fixtures still vary the spelling on
purpose to pin that. Read-side leniency was never the defect; it is what makes
a documentation-only fix sufficient.

No normalization at read, deliberately. Board lines are rewritten every session
by convention, so an unambiguous spec self-heals the existing lines in about one
session per active repo - mapping variants would be permanent code migrating
data that migrates itself. Nothing compares the field mechanically today either:
KOST is a display column and the board sorts on a numeric bucket key, so the
defect was real but latent. Two checks (28 -> 30) pin the documented form,
red first, because cleaning the data cannot fix a spec that regenerates the
divergence every session. Validation at write has no write path to attach to:
nothing in this repo emits a board line outside the fixtures.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01U6EixQo6hpoRCVtiAXdnFs
This commit is contained in:
Kjell Tore Guttormsen 2026-07-28 22:06:45 +02:00
commit 305f1687b7
5 changed files with 54 additions and 5 deletions
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17
scripts/board-selftest.sh
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@ -213,6 +213,23 @@ mkrepo "$ROOT/repo-f"
# Unreadable root is a no-op, not a crash.
"$BOARD" --roots "$ROOT/does-not-exist" >/dev/null 2>&1; check "missing root is a clean no-op" $?
# --- 8. The documented next-cost form IS the convention --------------------
# The cost field is free text on purpose: the parser reads to ';' or '-->' so
# the rubric's spacing survives, and the fixtures above deliberately vary the
# spelling to pin that leniency. But leniency on the read side means the ONLY
# thing holding the field uniform is what --help prescribes, and --help once
# prescribed a versionless `sonnet/xhigh` while the global rubric spelled
# `Sonnet 5 / xhigh`. Two specs for one field: measured across the real tree,
# not one board line used ours, and eight distinct strings were in circulation.
# Pinned here because cleaning the DATA cannot fix that - a spec that
# contradicts the rubric regenerates the divergence every session.
HELP="$("$BOARD" --help 2>/dev/null)"
printf '%s' "$HELP" | grep -q 'next-cost=Sonnet 5/xhigh'
check "--help prescribes the canonical next-cost form" $?
# The versionless form is what the rubric does NOT use; no example may show it.
if printf '%s' "$HELP" | grep -qE '(sonnet|opus|fable)/(high|xhigh)'; then rc=1; else rc=0; fi
check "--help shows no versionless model example" "$rc"
echo ""
echo "board-selftest: $PASS passed, $FAIL failed"
[ "$FAIL" -eq 0 ] || exit 1