# NousResearch/hermes-agent · Reduce per-server Python watchdog process overhead

## Open now

- Nothing open on GitHub.

These items address a performance concern where one parent-death supervisor (watchdog) process was being spawned per stdio MCP server, proposing to consolidate to one per process instead. The goal is to reduce fixed RSS and process count overhead.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #101598. Verify it addresses your case.
- **Recommended:** read PR #101598 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `resolved` · deciding PR(s): `pr-101598`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `1.00`: the share of member 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.

## Closed / duplicate issues

- #98084: Reduce fixed RSS from one Python MCP watchdog per stdio server

## Prior & competing PRs

- **#101598: perf(mcp): one parent-death supervisor per process instead of one per stdio server (salvage #93517)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - 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`
- **#93517: perf(mcp): one parent-death supervisor per process instead of one per stdio server**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `21c8fae0b8`, `4d04a47471`, `#101598`, `#98084`

## Fix status

- Merged to main in PR #101598 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-02`.