# NousResearch/hermes-agent · MCP stdio command resolution on Windows PATHEXT

## Open now

- 0 issues, 2 PRs open on GitHub.
- PR #56537: fix(mcp): honor env PATHEXT for stdio commands
- PR #67125: fix(mcp): resolve uv and uvx under filtered PATH

These issues and PRs address a bug where MCP stdio command resolution ignores the PATHEXT environment variable on Windows, with fixes covering uv/uvx path lookup and cross-platform python command handling.

## TL;DR

- 5 member(s): 0 open issue(s), 1 closed issue(s), 2 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #84429. Verify it addresses your case.
- **Recommended:** read PR #84429 (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-84429`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.40`: 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

- #56536: MCP stdio resolution ignores env PATHEXT on Windows

## Prior & competing PRs

- **#84429: fix: Windows MCP PATHEXT resolution + python3→python in cross-platform skills**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `optional-skills/blockchain/evm/SKILL.md`, `optional-skills/blockchain/hyperliquid/SKILL.md`, `optional-skills/blockchain/solana/SKILL.md`, `optional-skills/creative/concept-diagrams/SKILL.md`, `optional-skills/creative/tldraw-offline/SKILL.md`, `optional-skills/data-science/jupyter-notebook/SKILL.md`, `optional-skills/devops/pinggy-tunnel/SKILL.md`, `optional-skills/finance/stocks/SKILL.md`, `optional-skills/gaming/pokemon-player/SKILL.md`, `optional-skills/health/fitness-nutrition/SKILL.md`, `optional-skills/mcp/fastmcp/SKILL.md`, `optional-skills/migration/openclaw-migration/SKILL.md`, `optional-skills/productivity/telephony/SKILL.md`, `optional-skills/research/domain-intel/SKILL.md`, `optional-skills/research/drug-discovery/SKILL.md`, `optional-skills/research/osint-investigation/SKILL.md`, `optional-skills/security/godmode/SKILL.md`, `optional-skills/security/oss-forensics/SKILL.md`, `optional-skills/security/unbroker/SKILL.md`, `optional-skills/software-development/ast-grep/SKILL.md` (+23 more)
- **#56537: fix(mcp): honor env PATHEXT for stdio commands**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `tests/tools/test_mcp_tool_issue_948.py`, `tools/mcp_tool.py`
- **#56594: fix(mcp): honor subprocess PATHEXT for stdio resolution**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`
- **#67125: fix(mcp): resolve uv and uvx under filtered PATH**. open
  - maintainer direction: category `partial_fix`; implication `needs_llm`; refs `72ed4fb0cf7d`, `#37665`, `#67125`, `#67178`, `#37589`, `#56537`, `#56594`, `#61153`, `#8305`, `#67873`, `#56536`, `#54141`, `#374151`
  - files: `contributors/emails/[redacted:email]`, `tests/tools/test_mcp_tool_issue_948.py`, `tools/mcp_tool.py`

## Fix status

- Merged to main in PR #84429 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-08-12`.
- Subsystem: `mcp`