- components/phase-divider.tsx: PhaseChip (header, next to the session
title: phase-colored dot + Probing/Planning/Teaching) and PhaseDivider
(the transcript boundary: color-coded dotted rules + a small chip —
'Plan · N nodes' at the plan seam, 'Teaching' at the teach seam; probe
never renders, phases only advance). planNodeCount reads the seam
message's first plan tree.
- chat.tsx: dividers render at MESSAGE boundaries (phaseTimeline, one
linear fold) — the seam is the transition to the message's phase, so
the seam message's prose sits below its divider. requiresReveal now
uses phaseAt3 teach (an occupied node), so probe- AND plan-phase
questions auto-open.
- Retired the part-level plan-divider (artifact registry): the boundary
is message-level, not part-level. Its tests replaced by
render-phase-divider tests; core/phases gains tested phaseTimeline.
- core/phases.ts: Phase3 (probe/plan/teach) + pure derivations —
phaseOfTree (point-in-time, from the stored plan tree: no nodes → probe,
no occupied node → plan, occupied → teach) and phaseAt3 (monotonic
transcript fold for the dividers: failed plan_init never marks a seam;
phase only advances).
- contracts.ts: ChatSummary gains record-derived phase + pendingQuestion;
ChatListItem adds liveness-merged busy.
- store/chats.ts listChats computes the record-derived fields (tree +
pending question scan).
- api/chats route merges busy = turn running || running background job.
Lane crossing granted by master: contracts/store/api (schema arbitration).
Data-only inference: pre-plan planning reads as probe until the plan lands.
Amos