Separate *-UI-SPEC.md glob (edge-coverage glob exclusion at :746 left intact
- Hyrum/D-08); a terse lift bullet reusing the ## Edge Coverage rule verbatim
(covered -> truths string, backstop -> flat scalar {statement, verification:
backstop}, unresolved -> assumption; no new verb - ADR-550 #1278/#1154); and a
no-silent-drop checklist line. Lift logic lives ONLY in the plan-phase
workflow, never gsd-planner.md (D-10, agent-size cap).
NOTE: this grows plan-phase.md +862B, over the #1168 PRE_PHASE6 ceiling (94519)
by ~802B, so the workflow-size gates are RED until #1852's lazy-split lands the
-21KB headroom. Deliberately does NOT raise the ceiling constant (would collide
with #1820/#1835's in-flight raise). #1867 sequences after #1852; rebase +
regenerate the size baseline then.
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