# NousResearch/hermes-agent · Duplicate env_type argument bug in sandbox backends

## Open now

- Nothing open on GitHub.

A bug caused _build_sandbox_env() to receive multiple values for the 'env_type' argument, breaking all tools when using sandbox terminal backends. The members cover the error report and fixes targeting Singularity, Daytona, and Vercel sandbox backends.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #113250. Verify it addresses your case.
- **Recommended:** read PR #113250 (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-113250`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.67`: 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

- #112715: TypeError: _build_sandbox_env() got multiple values for argument 'env_type' — every tool fails when terminal.backend is a sandbox backend

## Prior & competing PRs

- **#113250: fix(terminal): singularity, daytona and vercel_sandbox backends create environments again instead of a TypeError (#112715, salvage #112723)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `tests/tools/test_terminal_sandbox_builder_dispatch.py`, `tools/terminal_tool_backends.py`
- **#112723: fix(tools): avoid duplicate sandbox env type dispatch**. closed without merge
  - maintainer direction: category `partial_fix`; implication `needs_llm`; refs `#113250`

## Fix status

- Merged to main in PR #113250 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-17`.