The wai-conformance step runs the module's and the PNG reader's unit tests,
tests/exact_tonemap.rs and tonemap_verify.py; the extension is in the
workflow's paths. determinism-tiers §2 names HDR display adaptation as
processing that alters the decode, and the pinned derivations as the way a
sink keeps its tier. The research registry records what was read for the two
companions and why both are classified conservatively. The carriage test
binds the gain map to an image, as rule 2 now requires. png_still gains a
greyscale round-trip test; clippy notes in the new code fixed.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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