openkal-musl 0.17.0: register it, and it asks nothing of the floor

[Sunrisepeak]

The release

openkal-musl 0.17.0 states what the library does not supply: a top-level [c-abi-absent] table of 24 rows, each naming the shape in which that absence reaches a program (link, enosys, accepted-no-effect), with the package's own CI asserting every row against the 1380 objects it builds. It also moves the implementation pins to openkal-linux 0.15.0 and openkal-windows 0.10.0. No source changed.

min_mcpp does not move, and that is measured

mcpp ignores a top-level table it does not know and refuses an unknown member of a table it does know. The first spelling of this table was [c-abi].absent, and measured against the genuine published 2026.9.18.3 archive — this index's current floor — it made that engine refuse the whole manifest on every target:

error: [c-abi] has no member 'absent'; the members are: builtins, data-model, presents, wchar

Top-level, the same engine builds it. openkal-musl's own CI pins 2026.9.18.3 and is green on 0.17.0, which is the end-to-end form of the same statement. A client stopped below 2026.9.20.1 keeps this package and loses only the note mcpp would attach to a link that failed at one of these names.

All 231 descriptors parse with 2026.9.18.3, so the descriptor grammar is unchanged as well.

Verification

sha256	recomputed from a fresh download of the GLOBAL url — matches
CN asset	fetched in full, cmp against the GLOBAL archive — byte-for-byte equal
lua syntax + 5 descriptor lints	pass
mcpp xpkg parse, all 231	pass on the pinned 2026.9.18.3

Two things this also fixes

• The entry lands in all three platform blocks. It went into linux alone first and check_platform_version_parity caught it: the omission would read as "0.17.0 not found" on macOS and Windows while the file plainly contained it.
• The header note said 0.15.0 was pending and unlisted. It had been released and registered, and so had 0.16.0. A note claiming a published version does not exist reads as missing data rather than a stale sentence, so it is replaced.