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fix(clawde): revive an agent whose tab is the last one in its workspace - #22

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Castrozan merged 1 commit into
mainfrom
steward-liveness
Aug 25, 2026
Merged

fix(clawde): revive an agent whose tab is the last one in its workspace#22
Castrozan merged 1 commit into
mainfrom
steward-liveness

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@Castrozan

@CastrozanCastrozan commented Aug 25, 2026

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Kira's steward has been dead for forty hours.

relaunch_wrapper_in_window on the herdr backend closes the agent's tab and then creates a replacement. herdr refuses to close a workspace's last tab:

Error: failed to replace herdr tab 'steward' in workspace 'clawde':
{"error":{"code":"tab_close_failed","message":"cannot close the last tab in a workspace"}}

Once betha-pm and jenny were removed from workspace clawde (outside active hours), steward was the only tab left. Its wrapper died, the supervisor tried to relaunch, the close was refused, and the create was never reached. The supervisor retried every ten seconds and wrote 8.8 MB of that one error.

Fix: create the replacement tab before discarding the superseded one. The workspace never drops to zero tabs, so the last-tab rule cannot block the relaunch. A failed discard now leaves a stale tab plus a logged error rather than a dead agent.

The tmux backend was never affected — respawn-window -k reuses the window in place.

Tests: both new cases fail against the old ordering with the production error and pass with the fix.

@Castrozan
fix(clawde): revive an agent whose tab is the last one in its workspace
2ed04de
The herdr backend replaced a dead agent's tab by closing it and then
creating a fresh one. herdr refuses to close a workspace's last tab, so
once every other agent in the workspace had been removed, the survivor's
relaunch failed on the close and never reached the create. Its tab stayed
a bare shell and the supervisor retried the same failing close every ten
seconds, forever. Kira's steward sat dead that way for forty hours behind
8.8 MB of identical errors.
Create the replacement tab first and discard the superseded one after, so
the workspace never drops to zero tabs and the last-tab rule can no longer
block a relaunch. A failed discard now leaves a stale tab and a logged
error instead of a dead agent.
The tmux backend was never affected: respawn-window -k reuses the window
in place and never removes it.
Agent-Machine: kira
Agent-Resume: claude --resume efee1316-8d94-438e-951e-e9c978626531
@Castrozan
Castrozan merged commit ae9887c into mainAug 25, 2026
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@Castrozan