# NousResearch/hermes-agent · Browser env isolation from host Python paths

## Open now

- Nothing open on GitHub.

A crash occurs when PYTHONPATH points to an external venv, causing module conflicts in the browser-use subprocess. The fixes isolate the Browser Use Python environment by stripping PYTHONPATH and PYTHONHOME from the CLI subprocess environment.

## 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 #86371. Verify it addresses your case.
- **Recommended:** read PR #86371 (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-86371`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #83427: browser_exec crashes: pydantic_core ModuleNotFoundError when PYTHONPATH points at Hermes venv (desktop app)

## Prior & competing PRs

- **#86371: fix(browser): strip PYTHONPATH/PYTHONHOME from browser-use CLI subprocess env (salvage #83471)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/[redacted:email]`, `tests/tools/test_browser_use_cli.py`, `tools/browser_use_cli.py`
- **#83471: fix(browser): strip PYTHONPATH/PYTHONHOME from browser-use CLI subprocess env**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#86371`, `#83427`, `#84841`, `#86006`, `#86104`
- **#84143: fix(browser): isolate Browser Use Python environment**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#83471`, `#83427`

## Fix status

- Merged to main in PR #86371 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-08-14`.
- Subsystem: `agent`