Day 23 standalone attachment verification
Date: 2026-09-20
Archive: os-day-23.zip
SHA-256: 5f4af72799f0d876218d62029fca483a47b2284f255ffa37c4f7f1c323ce1d3f

The archive was extracted into a fresh temporary directory. It contains no
build/ directory. The following targets exited with status 0:

- make build
- make check-shell
- make check-fd
- make check-fat
- make check-block
- make check-process
- make check-syscall
- make check-elf
- make check-memory
- make check-runtime-limit
- make check-keyboard

Rebuilt artifact SHA-256 values:

6008f1ea3a8174218d02be8358902e88ca4e0b914b1dfc8a1341f65848ed034d  build/kernel.bin
5b2614ac43484617317726c071e31680680b7e16a1febdd86b0af3c8f01792d5  build/mbr-shell.img
34d8c42838fb1656481a539e3398ca7faca1b6ba7b7a08ebd91118f5f83c5110  build/day23-user.elf
25fc6f4ce8493714e7056d2896c47e6a9f4c4db91a4b860dd474035542804798  disk/README.TXT

The rebuilt values match the source-tree evidence. This verification record
was created after the archive was frozen and is intentionally not embedded
back into that archive.