# NousResearch/hermes-agent · MCP stdio watchdog interfering with uvx and launcher-based servers

## Open now

- Nothing open on GitHub.

The members concern the MCP stdio watchdog and its handling of live servers, especially those started through launcher commands like uvx. One reports a bug where connections close after the handshake, and the others propose different approaches: using direct parent identity, skipping watchdog wrapping for launchers, or adding a disable option.

## TL;DR

- 4 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #66858. Verify it addresses your case.
- **Recommended:** read PR #66858 (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-66858`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.50`: 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

- #66423: \[Bug\]: mcp_stdio_watchdog breaks uvx-based MCP servers — "Connection closed" after handshake

## Prior & competing PRs

- **#66858: fix(mcp): use direct parent identity in watchdogs — stop false-killing live stdio servers (#62505, #66518, #66423)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/[redacted:email]`, `tests/test_slash_worker_watchdog.py`, `tests/tools/test_mcp_stdio_watchdog.py`, `tools/mcp_stdio_watchdog.py`, `tools/mcp_tool.py`, `tui_gateway/slash_worker.py`
- **#66430: fix(mcp): skip watchdog wrapping for launcher commands (uvx, npx, etc.) (#66423)**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#66858`, `#66423`
- **#66805: fix(mcp): add disable_watchdog config option for uvx servers (#66423)**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `#66858`

## Fix status

- Merged to main in PR #66858 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-07-18`.