# NousResearch/hermes-agent · Chroma embedding_model_dims injection bug fix

## Open now

- Nothing open on GitHub.

A bug where embedding_model_dims was incorrectly injected for the Chroma vector store provider caused Pydantic validation failures in mem0ai 2.0+. These members track the issue report and associated fixes to skip that injection for Chroma.

## TL;DR

- 4 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 0 merged PR(s), 3 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Closed / duplicate issues

- #75963: OSSBackend hardcodes embedding_model_dims for chroma, fails pydantic validation in mem0ai 2.0+

## Prior & competing PRs

- **#76001: fix(mem0): don't inject embedding_model_dims for chroma vector_store**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `781334eea4`, `#133822`
- **#76189: fix(memory): skip embedding_model_dims injection for chroma provider (#75963)**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#76001`
- **#76560: fix(memory): skip embedding_model_dims for chroma provider (#75963)**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#76001`

## Fix status

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