NousResearch/hermes-agent

Fix concurrent first-turn session interleaving bug

Cluster 125124. Data as of 2026-10-24 20:38 UTC

Nothing open on GitHub. Fix merged in #126309 on 28 Sep 2026. Check it covers your case.

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Known?: Yes. 4 related items grouped here, 1 issue already closed.
Fix event: A fix was merged to main in PR #126309. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this resolved, deciding PR #126309. That is separate from the fix event.
Still open: Nothing open on GitHub.

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A bug where concurrent API requests on a new session ID caused turns to interleave incorrectly (resulting in lost responses) was identified and addressed by acquiring a turn lease before reading session state.

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Fixes on record

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

#126309 fix(agent): concurrent API requests on a new session id no longer interleave their turns (#125124, salvage #125125)

merged to main

files: agent/turn_facade_lease.py, tests/agent/test_cross_process_turn_lease.py, tests/agent/test_turn_facade_lease.py

2 PRs closed without merging

From the close comments: done elsewhere 2

#125125 fix(agent): the first turn on a new session id takes the turn lease too · done elsewhere → f06c354, 29625ef, 4175585, dd3ba4b, e63b6fa, #84235, #125199
#125199 fix(agent): acquire first-turn lease before reading session state · done elsewhere → 66a0f47, 057bbb3, 6c1f0bc, d9b456e, #126309, #125125

Closed issues · 1

Closed#125124[Bug]: concurrent API requests on a new session id interleave their turns (user, user, assistant, assistant; one answer lost)

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At a glance

Merged PRs: #126309
Closed issues: 1
Attempts: 2 PRs closed without merging
Fix link checked: 28 Sep 2026

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