NousResearch/hermes-agent

Tool-call argument loss during stream interruption

Cluster 80498. Data as of 2026-10-25 11:21 UTC

Nothing open on GitHub. Fix merged in #81017 on 7 Aug 2026. Check it covers your case.

open issues

open PRs

items grouped

Known?: Yes. 4 related items grouped here, 1 issue already closed.
Fix event: A fix was merged to main in PR #81017. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this resolved, deciding PR #81017. That is separate from the fix event.
Still open: Nothing open on GitHub.

Next step: read #81017, then check it covers your case.

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These members concern a bug where tool-call arguments are silently lost or replaced with empty data when a stream ends mid-call, and related fixes to detect and prevent execution of tools with incomplete arguments.

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.

#80963 fix(agent): make the send-path message copy structural — close the history write-through class (#80498)

merged to main

files: agent/agent_runtime_helpers.py, agent/conversation_loop.py, agent/message_sanitization.py, agent/prompt_caching.py, contributors/emails/[redacted:email], tests/agent/test_canon_args_memo_parity.py, tests/agent/test_send_path_history_isolation.py
#81017 fix(streaming): never execute a tool whose arguments were lost to a mid-stream drop (#80498)

merged to main

files: agent/chat_completion_helpers.py, tests/run_agent/test_anthropic_mid_tool_call_drop.py, tests/run_agent/test_partial_stream_finish_reason.py, tests/run_agent/test_run_agent.py

1 PR closed without merging

From the close comments: merged via another change 1

#80623 fix(streaming): flag empty tool-call args on clean stream end (#80498) · merged via another change → #81017, #80963, #80498

Closed issues · 1

Closed#80498Tool-call arguments silently replaced with empty object when stream dies mid-call — silent data loss, no retry (write_file never executed)

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(structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

Merged PRs: #80963, #81017
Closed issues: 1
Attempts: 1 PR closed without merging
Fix link checked: 7 Aug 2026

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cluster/80498.json
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