# NousResearch/hermes-agent · MCP stdio bridge null args handling fix

## Open now

- 1 issue, 1 PR open on GitHub.
- #80652: \[Bug\]: MCP stdio bridge crashes with TypeError 'Value after * must be an iterable, not NoneType' when args is null in config
- PR #112354: fix(mcp): stdio servers with \`args:\` and no value connect instead of parking (#80652, salvage #80495)

A bug where the MCP stdio bridge crashes with a TypeError when the args field is null in config. The fix treats null args as an empty list in the stdio bridge.

## TL;DR

- 4 member(s): 1 open issue(s), 0 closed issue(s), 1 open PR(s), 0 merged PR(s), 2 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Open related issues

- #80652: \[Bug\]: MCP stdio bridge crashes with TypeError 'Value after * must be an iterable, not NoneType' when args is null in config

## Prior & competing PRs

- **#80653: fix: guard MCP stdio bridge against args=null in config**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#80495`
- **#80729: fix(mcp): treat null args as empty list in stdio bridge (#80652)**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#80495`
- **#112354: fix(mcp): stdio servers with \`args:\` and no value connect instead of parking (#80652, salvage #80495)**. open
  - maintainer direction: category `silent_close`; implication `active`
  - files: `tests/tools/test_mcp_tool.py`, `tools/mcp_tool_transport.py`

## Fix status

- No merged fix on record.
- Subsystem: `mcp`