NousResearch/hermes-agent

MCP stdio orphan process cleanup and reaping

Cluster 81880 · apps/desktop. Data as of 2026-10-25 11:21 UTC

Nothing open on GitHub. Fix merged in #101598 on 2 Sep 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 #101598. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this unresolved. That is separate from the fix event.
Still open: Nothing open on GitHub.

Next step: read #101598, then check it covers your case.

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These items concern orphaned MCP stdio processes accumulating across sessions or long-lived runs, and fixes aimed at reaping them at session-rotation and mid-process boundaries. The context includes both CLI and desktop/gateway environments, with memory pressure noted on constrained hardware.

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.

#101598 perf(mcp): one parent-death supervisor per process instead of one per stdio server (salvage #93517)

merged to main

files: tests/tools/test_mcp_death_supervisor.py, tests/tools/test_mcp_stdio_watchdog.py, tools/browser_tool.py, tools/mcp_death_supervisor.py, tools/mcp_stdio_watchdog.py, tools/mcp_tool.py

2 PRs closed without merging

From the close comments: done elsewhere 1 · other 1

#82141 fix(sessions): reap MCP stdio orphans at CLI session-rotation boundary · other → #81880
#101979 fix(mcp): reap stdio orphans mid-process in long-lived desktop/gateway runs (#81880) · done elsewhere → 2fa2f42, #81880, #101598

Closed issues · 1

Closed#81880MCP stdio orphans accumulate in desktop app between sessions (OOM on 16GB Macs)

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(structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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: apps/desktop
Merged PRs: #101598
Closed issues: 1
Attempts: 2 PRs closed without merging
Fix link checked: 2 Sep 2026

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