# NousResearch/hermes-agent · CPU SIMD compatibility checks to prevent SIGILL crashes

## Open now

- 1 issue, 1 PR open on GitHub.
- #109771: \[Bug\]\[Linux\]: hermes serve crashes with SIGILL on older x86_64 CPUs (NumPy 2.4.3 / CTranslate2 4.8.2)
- PR #128596: fix(voice): refuse SIMD-baseline native wheels on pre-x86-64-v2 CPUs instead of SIGILL

These issues and fixes address crashes caused by SIMD-optimized native wheels running on older x86_64 CPUs that lack required instruction sets. The work involves adding preflight CPU checks to detect incompatible hardware and refuse execution gracefully instead of crashing with SIGILL.

## 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #109771: \[Bug\]\[Linux\]: hermes serve crashes with SIGILL on older x86_64 CPUs (NumPy 2.4.3 / CTranslate2 4.8.2)

## Prior & competing PRs

- **#109784: fix(stt): refuse SIMD-baseline native wheels on pre-x86-64-v2 CPUs instead of SIGILL**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`
- **#110583: fix(stt): preflight CPU check for local transcription to avoid SIGILL (#109771)**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#109778`, `#109771`, `#109784`
- **#128596: fix(voice): refuse SIMD-baseline native wheels on pre-x86-64-v2 CPUs instead of SIGILL**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `tests/tools/test_native_cpu_compat.py`, `tools/native_cpu_compat.py`, `tools/transcription_local.py`, `tools/transcription_tools.py`, `tools/voice_mode.py`, `tools/wake_word.py`, `website/docs/getting-started/installation.md`

## Fix status

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