`createMessageHandler` is built per turn, so `transcriptId` started null on every one — and
`applyModelChange` runs before the turn emits anything, so the `model:switched` it produces arrived while
there was nothing to key the row on. A resumed conversation therefore recorded its model only on the closing
`result`, and a turn that died took the switch with it.
Observed rather than reasoned: the sidecar log said `claude-code/fable -> claude-code/opus[1m]` while the
stored row still said `claude-code/opus`.
Seeded from the resume id, which the Claude path already has in scope for the spawn. A brand-new
conversation still waits for `session:claude` — it has no id yet by definition — but resumed is the case
where switching actually happens.
Also lands docs/chat-sessions-list.md: the plan of record for the sessions-list revamp, agreed with the owner
today. Six numbered targets, four decisions with their reasoning, and the landmines — chiefly that merging
the two left-column panels strands `chat-live` in every persisted layout, which is the same stale-appType
shape that made /offscale render three server pickers this morning (ed3806f9). Written down because the shape
came out of a conversation, not out of the code.
pastilhas
fc67973876