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NousResearch/hermes-agent

Fix invalid reasoning signature replay errors in OpenAI/Codex

Cluster 70595 · agent. Data as of

Nothing open on GitHub. Fix merged in #115729 on 19 Sep 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 #115729. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #115729. That is separate from the fix event.
Still open
Nothing open on GitHub.

These items address a bug where rejected or invalid reasoning/thinking signatures during replay cause unhelpful errors or incorrect self-healing behavior instead of proper recovery. The work focuses on handling 'thinking_signature_invalid' and related 'Unsupported content type' errors more gracefully.

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.

  • #115729 fix(codex): rejected reasoning replays phrased as thinking_signature_invalid or codex 'Unsupported content type' self-heal instead of aborting the turn (#70595, #51512, salvage #70597)

    merged to main

    files: agent/codex_responses_adapter.py, agent/error_classifier.py, tests/agent/test_error_classifier.py, tests/agent/test_native_compaction.py, tests/agent/transports/test_codex_transport.py

1 PR closed without merging

From the close comments: merged via another change 1

  • #70597 fix(openai): recover invalid reasoning signatures · merged via another change → e62c5e3, #115729, #70595, #51512, #70597
Closed issues · 1
  • Closed#70595[Bug]: OpenAI thinking_signature_invalid bypasses encrypted replay recovery
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(structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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
agent
Merged PRs
#115729
Closed issues
1
Attempts
1 PR closed without merging
Fix link checked
19 Sep 2026

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