Bounded MCI numeric integration, 2026-10-20

Integrates the six numeric corrections in 2d061376beb0d701878d5377ddd530233ec79ca1, whose parent is 682d0c824a0289e502276fb814c368e9e1970d57, with one audited census digest. The four candidate files are unchanged.

The independent lifetime audit accepted only unchanged lifetime semantics across the two host literal substitutions: _mciCommand's invalid-device early return changes 0x106 to 0x101; _mciStringCommand's missing-disc early return changes 0x115 to 0x114. Both remain immediate nonzero returns. All other host bytes remain identical, including the later string-command invalid-device literal. Neither changed path creates or delivers a callback.

Only lib/host-audio.js:host-file changes in the census:

098b50a41a5c42c7da77f1452881f62c1476a1822f6e8edaea5c3a57afa78af8
6f54dc628fae27a8badfa705aecbbf1bcc59ce90a536fbb9991095f581f08812

Its other fields, including ownership: "pending", remain unchanged. The independent audit reviewed waveOut, waveIn, MCI, and other host callback guards and cleanup. Five behavioral probe groups passed on parent and candidate. Four mutations (busy completion discard, stale submission, wrong cooperative owner, stale CD generation) failed behavioral assertions even after refreshing their digests made the inventory pass. A refreshed digest alone is therefore not semantic acceptance.

Independent execution evidence: scratch/usage-watch/mci-lifetime-readonly-audit-oct20/{final.txt,events.jsonl}. Integration replay and checks: scratch/runs/20261020-mci-audited-integration/. The replay reuses the immutable source archive in scratch/runs/20261020-mci-constants-integration-retry/sources.json.br (SHA-256 864c8a57ab1a5f9be3cba27a052633cfc9e9fb4a9f0731744fea735fdd25e035).

This does not certify complete callback ownership, missing-disc policy, MCI error-text conformance, Messiah's warning/overlay cause, native execution, audio output, or gameplay. No MIDI/carry changes are combined. No full build, browser run, guest runtime, or deployment is part of this integration.