Cairn
NousResearch/hermes-agent

Photon sidecar crash recovery and cancellation bug

Cluster 73159 · gateway. Data as of

Nothing open on GitHub. Fix merged in #73563 on 29 Jul 2026. Check it covers your case.

The short answer

0open issues
0open PRs
3items grouped
Known?
Yes. 3 related items grouped here, 1 issue already closed.
Fix event
A fix was merged to main in PR #73563. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #73563. That is separate from the fix event.
Still open
Nothing open on GitHub.

These items concern a race condition in Photon's sidecar lifecycle where a CancelledError during _stop_sidecar() cancels the supervisor task itself, preventing reconnection after a crash. The work involves diagnosing and fixing the crash recovery path, event-loop handling, and structured error propagation.

Open issues0

No open issues.

Open PRs0

No open pull requests.

Fixes on record

Merged to main. A stamp counts the issues a fix is linked to.

  • #73563 fix(photon): sidecar lifecycle cluster — crash recovery, event-loop, structured errors (salvage x7)

    merged to main

    files: contributors/emails/[redacted:email], gateway/run.py, plugins/platforms/photon/adapter.py, plugins/platforms/photon/sidecar/index.mjs, tests/gateway/test_multiplex_adapter_registry.py, tests/plugins/platforms/photon/test_fatal_notify_self_cancel.py, tests/plugins/platforms/photon/test_overflow_recovery.py, tests/plugins/platforms/photon/test_sidecar_lifecycle.py, tests/plugins/platforms/photon/test_spectrum_patch.py

1 PR closed without merging

From the close comments: merged via another change 1

  • #73170 fix(photon): stop sidecar-crash fatal handler from cancelling its own supervisor task · merged via another change → #73563, #72475, #73159
Closed issues · 1
  • Closed#73159Photon SIDECAR_CRASHED: reconnect never executes — CancelledError race in _stop_sidecar() cancels own supervisor
How this cluster was grouped
  • Link evidence (structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
  • Pairwise link density 0.67: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. 1.00 means every pair is linked.

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At a glance

Subsystem
gateway
Merged PRs
#73563
Closed issues
1
Attempts
1 PR closed without merging
Fix link checked
29 Jul 2026

For your agent

The same facts, typed.

cluster/73159.json
cluster/73159.md