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docs: the gate on the layer declaration is the index, not this package's floor #3

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Sunrisepeak merged 1 commit into from
Aug 24, 2026
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docs: the gate on the layer declaration is the index, not this package's floor #3

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15 changes: 13 additions & 2 deletions mcpp.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -38,8 +38,19 @@ provides = ["hosted-standard-library", "mcpp:c++-abi=libc++"]
#
# ⚠️ That refusal is itself fixed in 2026.8.24.2 — an unknown layer name in a
# DEPENDENCY's manifest is now ignored with a warning rather than refused — but
# the fix cannot apply retroactively to tools already released. The declaration
# is therefore added once this package's floor moves to 2026.8.24.2.
# the fix cannot apply retroactively to tools already released.
#
# ⚠️ AND THE CRITERION IS NOT THIS PACKAGE'S FLOOR. It is what the index serves,
# because that is what a reader of this file actually has. Measured 2026-08-24
# against the two keys, with a dependency declaring each and a build tool taken
# from the version the index named `latest`:
#
# requires = ["mcpp:compiler=llvm"] 2026.8.24.1 exit 0, ignored
# provides = ["mcpp:compiler-runtime=…"] 2026.8.24.1 exit 2, refused
#
# So `requires` is safe to publish today and the layer declaration is not. The
# gate on adding it is that the index's `latest` be at 2026.8.24.2 or above —
# not that a newer mcpp exists, and not that this package's floor was raised.

# What this package needs of the layer it does not supply.
#
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