orphaned browser daemon cleanup and process leaks

NousResearch/hermes-agent · cluster 13081 · agent

Data as of 2026-10-22 12:15 UTC

Nothing open on GitHub. Fix merged in #13155. Check it covers your case.

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Known?: Yes. 8 related items grouped here, 3 issues already closed.
Fix event: A fix was merged to main in PR #13155. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this partially resolved, deciding PRs #13155, #94183. That is separate from the fix event.
Still open: Nothing open on GitHub.

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Multiple issues and fixes addressing orphaned agent-browser daemon processes and Chromium trees that accumulate due to timeouts, force-closed sessions, or startup failures. Includes detection, reaping logic, idle timeouts, and a bug in the glob pattern used to identify orphaned sessions.

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.

#13155 fix(tools): reap orphaned cloud browser daemons with hermes session prefix

merged to main

files: tools/browser_tool.py

Show the diff

tools/browser_tool.py

@@ -582,6 +582,8 @@ def _reap_orphaned_browser_sessions():
     socket_dirs = glob.glob(pattern)
     # Also pick up CDP sessions
     socket_dirs += glob.glob(os.path.join(tmpdir, "agent-browser-cdp_*"))
+    # Also pick up cloud-provider sessions (browser-use/browserbase/firecrawl)
+    socket_dirs += glob.glob(os.path.join(tmpdir, "agent-browser-hermes_*"))
 
     if not socket_dirs:
         return

#94183 fix(browser): suspect-session recycle + wedged-daemon tree-kill on timeout (#85125 3b-browser/4c)

merged to main

files: tests/tools/test_browser_open_timeout.py, tests/tools/test_browser_suspect_recycle.py, tools/browser_tool.py
#94188 refactor(deadline): consolidate site-local tree-kills onto agent.deadline.kill_process_tree (#85125 4d)

merged to main

files: hermes_cli/_subprocess_compat.py, tests/agent/test_treekill_consolidation.py, tests/tools/test_browser_npx_warmup.py, tools/browser_tool.py, tools/code_execution_tool.py

2 PRs closed without merging

From the close comments: done elsewhere 1 · merged via another change 1

#13084 fix(tools): reap orphaned cloud browser daemons with hermes session p… · merged via another change → #13155
#68220 fix(browser): tree-kill orphaned agent-browser daemon on command timeout (#68139) · done elsewhere → #94183, #85125, #68139, #94188

Closed issues · 3

Closed#13081[Bug]: `_reap_orphaned_browser_sessions()` glob pattern doesn't match actual socket directories, causing daemon startup failure
Closed#13793Orphaned agent-browser daemons accumulate after force-closed sessions, eventually freezing CLI input
Closed#68139browser_tool: command timeout leaks the spawned agent-browser daemon + Chromium tree (long-lived gateway accumulates orphans until host OOM)

How this cluster was grouped

Link evidence (partly structural links): some members are connected by structural evidence (shared changed files, or a closing/superseded reference); the rest are joined by an automated relevance judgement over their text.
Members outside that structural core may belong to a different underlying problem.
Pairwise link density 0.20: 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: #13155, #94183, #94188
Closed issues: 3
Attempts: 2 PRs closed without merging
Fix link checked: 27 Aug 2026

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cluster/13081.json
cluster/13081.md