Actual PostSample controller host qualification

Actual matching artifact preparation passed on 2026-10-04 from 03:35:08.275473Z to 03:35:10.201242Z. This closes task 5h.4’s positive host preparation gate. It does not establish any new board check or physical marker, receipt, recovery, ordinary root or touch result; those remain UNVERIFIED. No UART access, board command or implicit build was performed by this qualifier.

Worktree /home/jadams/tmp/k230-mainline-uart-progress-post-sample-controller, branch mainline-uart-progress-post-sample-controller, base 9248ffa4, controller ea31b762477bebbcdcc1e048447fb90870541f91. Owned for this handoff: this evidence directory and only task 5h.4’s completion note/checkbox. Root owns the matching build, staging, board/UART and independent recovery. Cached start/handoff status scans are host-only; no build-slot or board reservation was taken.

The actual full build receipt returned zero for frozen root revision 75cc49df12972235be411e6eca739935ce75614d. The qualifier first required that exact revision and compared ASTs of its preparation functions and relevant constants with the frozen root source. It then used the protected normal report and exact matching manifest to run actual prepare_trial followed by prepare_uart_progress(..., uart_progress_breadcrumbs=True, uart_progress_post_sample=True).

The realized identities are:

Read-only queries tied the actual kernel and dev/config to the same derivation. All six required built-in config options were present exactly once. The full config hash is 52e7470b108ad094dbdf88b94e3e8838564edbda9e7a015b4279012e6765c9f1. Its derivation’s immutable source had the reviewed worker SHA256 aee68aaec5c5c0e2b23919901eb99189265fd2b4787a0e50bc11159afd81ef9b. The linked Image hash is 2ef34d863f0bb2dee8886d6a2b76fa05c52354e21fe055a2ff56febb26404557. All four complete NUL-terminated fixed marker strings and both setup keys were unique in that Image. Their offsets, full artifact hashes/CRCs and actual archive executable/loader proofs are in result.json.

Actual preparation inspected the selected compressed archive and U-Boot wrapper, RISC-V Bash and original systemd ELF executables, shared archived ELF interpreter, manifest hashes and five load ranges. The protected wrapper hash/size came from the existing guarded normal report and its fixed controller CRC. There was no new card readback. Registration absence is an assertion included in the pre/post helper, not a protected board check performed during this host invocation.

The exact qualified volatile policy adds only k230.uart_progress_post_sample=1 after the inherited Breadcrumbs policy for this selected system. The full literal U-Boot command is 419 bytes; the corresponding prior command is 386 bytes. There is no variable expansion, appended duplicate init/control, saveenv, card/profile selection change or new hardware DT setting. The controller still requires exact freshly received kernel arguments before its one builtin stimulus and never issues a candidate reboot. Host arrival labels are not measurement timestamps. Fixed record presence does not establish its own firmware return, and missing output cannot locate a stop.

Executed host command:

TMPDIR=$HOME/tmp python3 "$HOME/tmp/k230-mainline-uart-post-sample-host-qualification/qualify.py"

qualification-command.py preserves the exact executed runner, SHA256 5b8f5d1088bb13252a7dc420a86de9c2fe74eec45de1ac713bf5db78001c6beb. It requires fresh outputs and the protected expected-revision file. Reexecution belongs in a new protected directory under ~/tmp, never this public evidence directory. Its baseline/prepared-state/transport files remain private.

The private matching manifest is available to the root operator at ~/tmp/k230-mainline-uart-post-sample-host-qualification/candidate-manifest.json, SHA256 da99e68ed9bf00f2ed689ac447b9b4eaba0876e5c9b1590e5192a75bc5d1c2ee. Root must review/copy it into the new private trial directory, use fresh log/result paths, and repeat actual protected normal preflight/load CRC guards. After all matching object/artifact/controller gates and independently verified normal recovery, the root operator command is:

python3 tools/mainline-drm-initrd-shell-trial.py --mode minimal \
  --same-image-shell-pid1 --uart-progress --uart-progress-breadcrumbs \
  --uart-progress-post-sample \
  --bundle /nix/store/fjmxf6kn1yq0xk9v783amgymybhcrwkb-k230-mainline-drm-trial-boot-files \
  --manifest PRIVATE_MANIFEST --normal-report PRIVATE_NORMAL \
  --log PRIVATE_FRESH_LOG --result PRIVATE_FRESH_RESULT

Physical tasks 5h.5–6 and ordinary root/touch task 5b.5 remain open. This receipt proves actual host qualification, not deployment, stage/flash or hardware behavior.