# NousResearch/hermes-agent · Environment variables not reaching MCP stdio server subprocesses

## Open now

- 0 issues, 1 PR open on GitHub.
- PR #55047: fix(tools): add tool runtime env vars (BUN_INSTALL, NODE_OPTIONS, DENO_INSTALL) to _SAFE_ENV_KEYS

Most members concern env vars (Bitwarden-injected secrets, .hermes/.env values, and some tool runtime variables) not being passed to MCP stdio server subprocesses, with several PRs proposing fixes. One member is only a duplicate-closure notice, and the _SAFE_ENV_KEYS change is a related but somewhat distinct allowlist adjustment.

## TL;DR

- 6 member(s): 0 open issue(s), 3 closed issue(s), 1 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #69053. Verify it addresses your case.
- **Recommended:** read PR #69053 (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: `partially_resolved` · deciding PR(s): `pr-69053`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_PARTIAL`): some members are connected by structural evidence (shared changed files, or a closing/superseded reference); the rest are joined by an automated relevance judgement over their text.
- Members outside that structural core may belong to a different underlying problem.
- Pairwise link density `0.25`: 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

- #37499: Bug: Bitwarden-injected secrets are not available to MCP stdio servers
- #44546: Duplicate — closed in favour of #44548
- #44548: .hermes/.env vars not propagated to MCP server subprocesses — credential duplication friction

## Prior & competing PRs

- **#69053: fix(mcp): pass secret-source-injected env vars to stdio servers (salvage #37523)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `tests/tools/test_mcp_tool.py`, `tools/mcp_tool.py`
- **#37523: fix(mcp): pass Bitwarden secrets to stdio servers**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `#69053`, `#37499`
- **#55047: fix(tools): add tool runtime env vars (BUN_INSTALL, NODE_OPTIONS, DENO_INSTALL) to _SAFE_ENV_KEYS**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `tests/tools/test_mcp_tool.py`, `tools/mcp_tool.py`

## Fix status

- Merged to main in PR #69053 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-07-22`.
- Subsystem: `agent`