§7.6 landed — export + catalog RC ✓ landed 2026-07-21

Evergreen: catalog-expert-review-remediation §7.6. Resolves f-close-out-residuals. The close-out surfaced that the planned residue was mis-scoped twice over, and drove out four genuine root-cause bugs before the RC could cut.

1 — the residue was a double misdiagnosis

The plan carried the residue as "6 *_strain_gauge→*_strain_gage US-spelling renames." Both halves were wrong:

• Spelling was a red herring. american_spelling_check (NC-17) is an advisory audit — it never quarantines. And gauge is the standard American spelling (Merriam-Webster headword; the IMAS DD itself writes "strain rosette gauge"). The breame library maps gauge→gage, a niche variant. Chasing it was incorrect.
• The names are correct. Verified 1:1 against the DD: operational_instrumentation/sensor/direction and .../direction_second (a strain rosette gauge's two measurement-direction unit vectors), each with x/y/z components → 6 names, structurally identical to 20+ accepted siblings (x_direction_unit_vector_of_camera, …). Not a pipeline error.
• The real defect: 5 of the 6 documentation bodies contained unfilled/bracketed placeholder text (e.g. [x component of the second measurement-direction unit vector]) that trips placeholder_check — a critical, quarantining audit → excluded from export.

2 — docs fixed, zero renames

Authored clean, bracket-free documentation for the 5 affected names, modelled on the one already-valid sibling, applied through the pipeline via sn edit --docs (each scored ≈0.90, above the 0.85 bar). All six now name=accepted · docs=accepted · validation=valid. A deterministic drain_validation pass cleared the stale placeholder-era quarantines (0 re-quarantined). The names themselves were never touched.

3 — four root-cause fixes driven out en route

ISN grammar carried a matching correction: the strain_gauge/strain_gauge_sensor locus tokens were briefly renamed to gage and then restored (ISN 73126e5); imas-codex re-pinned across the churn.

4 — catalog RC cut

Released v0.2.0rc63 → origin (ISNC commit 007a39f1). Export: 1858 names of 1909 candidates (3 below-score, 5 unreviewed, 6 grammar-parse excluded in RC mode, 1 bare coordinate quarantined). All four export gates PASS (graph_tests, score_thresholds, cross_field_consistency, divergence_detection); staging validation clean. The rc62→rc63 delta (≈2148→1858) is expected RC churn — superseded predecessors from this plan's own remediation renames drop out, new names land.

5 — follow-on

One convention-level question was logged, not a defect: f-ordinal-carrier-readability — names like x_first_measurement_direction_unit_vector_of_strain_gauge read awkwardly because the geometry carrier leads with an ordinal under the bare component-prefix grammar rule. The names are canonical and DD-faithful; whether ordinal-led carriers should be re-phrased is a grammar review, not an RC blocker.