NousResearch/hermes-agent

Strip unsupported kwargs before Anthropic Messages calls

Cluster 31673 · agent. Data as of 2026-10-28 11:56 UTC

Nothing open on GitHub. Fix merged in #42155 on 8 Jun 2026. Check it covers your case.

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Known?: Yes. 3 related items grouped here, 1 issue already closed.
Fix event: A fix was merged to main in PR #42155. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this resolved, deciding PR #42155. That is separate from the fix event.
Still open: Nothing open on GitHub.

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These items address a bug where Responses-API-only keyword arguments (such as 'instructions') were incorrectly passed through to the Anthropic Messages SDK, causing unexpected keyword argument errors. Fixes target the call sites to strip those kwargs before invoking Messages or stream().

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Fixes on record

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

#42155 fix(anthropic): strip Responses-only kwargs before Messages SDK call (#31673)

merged to main

files: agent/anthropic_adapter.py, agent/chat_completion_helpers.py, run_agent.py, tests/agent/test_anthropic_kwargs_sanitize.py

1 PR closed without merging

From the close comments: done elsewhere 1

#31746 fix(anthropic): strip Codex/Responses-only kwargs at Anthropic call sites (#31673) · done elsewhere → 399b8ee, #42155, #31673

Closed issues · 1

Closed#31673Messages.stream() got an unexpected keyword argument 'instructions'` when continuing from a successful `vision_analyze` aux call

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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: #42155
Closed issues: 1
Attempts: 1 PR closed without merging
Fix link checked: 8 Jun 2026

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