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NousResearch/hermes-agent

Structured output format compatibility across AI providers

Cluster 82816 · agent. Data as of

Nothing open on GitHub. Fix merged in #113966 on 17 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 #113966. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #89589. That is separate from the fix event.
Still open
Nothing open on GitHub.

These items address failures in session title generation and structured output handling when providers like vLLM or Anthropic reject certain response_format types (e.g., json_schema), including retry logic with fallback formats.

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.

  • #89589 fix(aux): translate response_format for Anthropic wires and retry when providers reject structured output

    merged to main

    files: agent/auxiliary_client.py, tests/agent/test_anthropic_structured_output.py, tests/agent/test_structured_output_rejection_retry.py

  • #113966 fix(aux): structured-output 400s no longer kill fallback candidates or cost a doomed first request on DeepSeek (#83390, #105191, salvage #92908)

    merged to main

    files: agent/auxiliary_client.py, agent/auxiliary_structured_output.py, plugins/model-providers/deepseek/__init__.py, providers/base.py, tests/agent/conftest.py, tests/agent/test_auxiliary_structured_output.py, website/docs/developer-guide/model-provider-plugin.md

1 PR closed without merging

From the close comments: done elsewhere 1

  • #82868 fix(agent): retry title generation with json_object on HTTP 400 · done elsewhere → 5cc8177, #89589, #113966, #83390
Closed issues · 1
  • Closed#82816Session auto-title generation fails 100% of the time (HTTP 400) on OpenAI-compatible providers that reject response_format json_schema (vLLM guided_grammar / xgrammar)
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(structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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
#89589, #113966
Closed issues
1
Attempts
1 PR closed without merging
Fix link checked
17 Sep 2026

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