The primary Claude pane is anchored to a deterministic session id derived
from the repo path so it resumes the same transcript across restarts
(D-77/T-146). But /clear (T-156) respawned on a fresh RANDOM id, so the
next launch re-resolved to the deterministic id, found its old transcript
on disk, and resumed the PRE-clear conversation — the cleared session was
orphaned and the clear silently didn't stick.
/clear in the primary pane now deletes the deterministic session's
transcript (and its sidecar dir) and respawns on the SAME id, so
`--session-id` re-creates it empty and a cleared primary stays cleared.
Secondary panes are throwaway and keep the fresh-random behaviour.
Factor the duplicated transcript-path construction out of claude_pane into
session_naming helpers (claudeProjectDir / claudeTranscriptPath /
clearSessionTranscript) so the clear logic is DRY and unit-tested.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>