findLatestOmpSessionId()'s newest-mtime pin ran eagerly inside
_buildRespawnPaneOptions(), which startInteractive() calls unconditionally
on every boot-recovery reattach — before anything checks whether the pane
is actually dead. With two omp tabs in the same case dir, this could pin
an ALIVE pane's session onto whichever sibling's file happened to be
newest on disk, purely as a side effect of building options that might
never lead to a respawn (reported in Ark0N/Codeman#353 review).
Move resolution out of the eager builder into _pinOmpRespawnId(), called
explicitly only where a respawn is actually confirmed: the dead-pane
branch in _setupOrAttachMuxSession() and reattachRemote(). Add
resolveAndClaimOmpSessionId(), which verifies each candidate's own file
header (cwd) rather than trusting the mangled-directory match alone, and
tracks claimed ids in a process-wide registry so two ambiguous resolutions
can't both pick the same sibling's conversation.
Found live 2026-08-27 by Tim: clicking Run OMP to start a brand-new session
in a case directory with prior omp history launched --resume <old-id>
instead of a clean `omp` invocation.
Root cause: Session._resolvedOmpRespawnConfig() resolves-and-pins the
newest on-disk omp conversation as a side effect on this._ompConfig. That
is correct when reattaching to an ALREADY-TRACKED mux session (a dead-pane
respawn, or a boot-recovery reattach - the constructor sets _muxSession
from persisted state before startInteractive() ever runs there), but it
ran unconditionally. startInteractive() computes
`respawnPaneOptions: this._buildRespawnPaneOptions()` eagerly in the same
object literal that builds `createSessionOptions.ompConfig: this._ompConfig`,
so for a genuinely brand-new session (no muxSession in its create config,
_muxSession still null) the resolve-and-pin side effect ran and poisoned
this._ompConfig before that field was even read.
Fix: gate the resolve-and-pin logic on `this._muxSession` already being
set. A fresh session has no muxSession yet and now passes through
untouched; a real reattach (muxSession present since construction) keeps
resolving and pinning exactly as before.
Verified live in production against the exact reported scenario (a fresh
omp session in a case dir with 8+ hours of prior omp history) - confirmed
both via the API (ompConfig stays empty, claudeSessionId equals the
session's own id) and visually in the GUI. Regression test constructs a
real Session + TmuxManager to exercise the actual private-method
interaction directly, since no existing test called startInteractive() at
all.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
timkjr