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NousResearch/hermes-agent

Codex reasoning-replay 'Unsupported content type' error recovery

Cluster 51512 · 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
4items grouped
Known?
Yes. 4 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 members all concern Codex rejecting replayed reasoning content with a 400 'Unsupported content type' error, which reportedly bypasses the existing invalid_encrypted_content self-heal path. One member describes the problem and the others propose changes to recover from it rather than abort the turn; the outcome of those changes is not established here.

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

2 PRs closed without merging

From the close comments: merged via another change 1 · superseded by another PR 1

  • #51521 fix: recover Codex replay from unsupported content type · merged via another change → e62c5e3, #115729, #70595, #51512, #70597
  • #51525 fix(agent): recover codex unsupported content replay errors · superseded by another PR → #51521, #51512
Closed issues · 1
  • Closed#51512openai-codex: rejected reasoning-replay returns 400 {"detail":"Unsupported content type"} and bypasses the invalid_encrypted_content self-heal
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(structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 0.50: 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
2 PRs closed without merging
Fix link checked
19 Sep 2026

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The same facts, typed.

cluster/51512.json
cluster/51512.md