[DrunkOnJava]

Summary

hemanth1986's ten held-out pairs (#408) join research/holdout-models.tsv: a two-storey house and a one-storey office, each saved by Revit 2022, 2024, 2025, 2026 and 2027 and exported by the same release ("IFC4 Reference View [Architecture]", base quantities on). They are pinned at commit b9499a43 of hemanth1986/rvt-holdout-models, each file by sha256 and size from the repository's SHA256SUMS.

Rights and handling

• The modelling is CC BY 4.0 (credit "hemanth1986"). The README says the door, window and furniture families are Autodesk's template content, which that licence does not cover.
• So they are handled exactly like the other held-out models: fetched from the contributor's repository for a run, never committed, and only summary counts leave the runner (tools/ci/scrub-holdout-results.sh).
• The repository was created for Held-out validation: measure on licensed models not used to develop the decoder #408 in one commit, and its README states the models were built by a Revit add-in and never used for rvt-rs work.

First measurement, before any fix

Measure 41542881928, main at c8620bd, -f holdout=true -f models="holdout-rvt-holdout-*", counts only:

model	Revit's classes: written as Revit's / absent	GlobalId = Revit's	properties equal / different / missing / written that Revit omits	quantities equal / different / missing / written that Revit omits
house 2022	41 of 42 / 1 (the roof)	37	109 / 0 / 104 / 0	16 / 0 / 210 / 0
house 2024	90 of 90 / 0	86	298 / 1 / 76 / 0	87 / 1 / 234 / 0
house 2025	90 of 90 / 0	86	299 / 0 / 77 / 0	89 / 1 / 232 / 0
house 2026	90 of 90 / 0	86	209 / 0 / 143 / 0	21 / 1 / 300 / 0
house 2027	90 of 90 / 0	86	209 / 0 / 145 / 0	17 / 1 / 349 / 0
office 2022	37 of 38 / 1 (the roof)	33	105 / 0 / 59 / 0	10 / 2 / 173 / 0
office 2024	77 of 77 / 0	73	239 / 0 / 51 / 0	74 / 3 / 186 / 0
office 2025	77 of 77 / 0	73	239 / 0 / 52 / 0	74 / 3 / 186 / 0
office 2026	77 of 77 / 0	73	186 / 0 / 96 / 0	14 / 3 / 246 / 0
office 2027	77 of 77 / 0	73	186 / 0 / 96 / 0	10 / 3 / 292 / 0

These stay held out: no fix is to be developed against them, and a rule that writes new values runs -f holdout=true before it lands, as with the others.

Testing

• N/A: research data only. The fetch script checks each file against its pinned sha256 and size, and run 41542881928 fetched and verified all twenty.

Audit-honesty checklist

• README / docs reflect the current state after this PR
• N/A: changelog fragment (no user-visible behaviour)
• Commit messages describe what changed and why
• No emojis in code, docs, or commit messages
• No private paths, personal email addresses, or internal jargon in committed files

Legal and contribution hygiene

• Apache-2.0
• No Autodesk proprietary content committed (the files are fetched, never stored)
• No fixtures

Breaking changes

None.