[noahgift]

Rebuild of #6148 (DIRTY after main moved; guards-nightly step + manifest row now sit beside the affected-set ones), linear off current main. Supersedes #6127 and #6148: same single move commit with the seat-2 findings folded in, still one commit and one ticket.

1. ml-tuner documented as a deprecated no-op (Cargo.toml still declares ml-tuner = []).
2. check_tuner_test_move.sh reads CI fragments 295 and 298 (mutants S16, S17 turn it red); the false L6 label is gone.
3. The unproven "proved in the PR body" claim is replaced by what is true: compared at move time, digests pin the bodies now.
4. grep rc>=2 fails closed (mutant S18 isolates it: red with the guard, green without).

--self-test: 26 passed, 0 failed; live check green.

🤖 Generated with Claude Code

[github-actions]

§13.11 rung 1 — quorum shadow verdict

S13-SHADOW pr=6166 head=9c3069d5d69d04f2309cc0f0a989330c6d7551dd verdict=REFUSE class=Q1 arm_rc=1

Shadow mode: this records a verdict and merges nothing. A refusal
to arm is not a block (§13 adds zero rows to §7) — the pull request is
exactly as green as it was.

[noahgift]

superseded by #6168 (squashed to one commit, no operator ticket id)