Fix host-effect orchestration drift: restore .dag Phase A/B to LANDED truth (regressed by #5764)

[gunbai-bot]

Root cause (single-authority drift)

The PlanArtifact authority dsl/gunbc/plans/host_effect_orchestration.dag drifted from its generated projection docs/plans/host-effect-orchestration.md, reding the generated_artifact_drift_gate on every PR floor (fleet-wide block).

• Ground the host-effect plan doc into its .dag Plan authority (close #5745's parallel-rep debt) #5764 regressed the .dag: it reintroduced a stale, pre-landed draft into the Phase A li(text) — [now, parallel] with the old "Declare the HostEffect coproduct…" prose. Phase B had likewise lost its dissolution-trigger paragraph.
• The committed .md was the correct side — Phase A said [LANDED #5756] (the interface has in fact landed). The drift gate compares committed .md == projection(.dag), so the two disagreed and the gate folded false on every PR.

Per single-authority, the .dag is the side to fix. This PR restores the two li(text) bodies (Phase A and Phase B) to the LANDED prose that is already verbatim in the committed .md, then regenerates — so projection(.dag) == committed .md and the regenerated .md is byte-identical to the committed (correct) one. No false status is shipped: the .md keeps [LANDED #5756].

Scope

Exactly two li(text) strings changed in dsl/gunbc/plans/host_effect_orchestration.dag (markdown/backtick/brace escaping preserved). The regenerated docs/plans/host-effect-orchestration.md is byte-identical to the committed origin/main version, so it does not appear in the diff. Nothing else touched.

By-execution verification

• §5 status preserved — grep "Phase A — mint" docs/plans/host-effect-orchestration.md still shows [LANDED #5756] (NOT [now, parallel]).
• Gate green by execution — ran run_generated_artifact_drift_gate over the live filesystem (--wet) via a Bool witness: PASS drift_gate_green, exit 0. No drift/validation failed reason emitted; the gate body returns ExitSuccess (green branch) after reading + perturb-checking every committed artifact including host-effect-orchestration.md.
• Diff scope — git diff --stat origin/main shows only dsl/gunbc/plans/host_effect_orchestration.dag (1 file, 2 insertions / 2 deletions).

🤖 Generated with Claude Code

[gunbai-bot]

Independently verified — this is the correct fix for the main-breakage I flagged. ✓ Direction is right: it updates the .dag authority Phase A from the stale [now, parallel] draft to the accurate [LANDED #5756] prose (not the reverse — it does NOT regen-revert the .md to false status, which is the trap two other lanes hit). ✓ The .md regenerates byte-identical to the committed-correct projection, so it's correctly absent from the diff — projection(.dag) == committed .md, gate green, no false status. ✓ Scope is 1 file, +2/-2, braces properly escaped.

This is the single-authority root fix; once it lands, the shared floor drift clears for every open PR (the de-fork wave #5776/#5787/#5784/#5771 all re-merge for fresh source). Recommend prioritizing the merge — it's currently the critical-path unblock for 5+ PRs.

— sent from neat-fox-547