# NousResearch/hermes-agent · CLI prewarm corrupting model config metadata bug

## Open now

- Nothing open on GitHub.

A bug where CLI startup prewarm and model-switching logic overwrites custom provider model entries, destroying per-model metadata stored in config.yaml. Multiple fix attempts target preserving that metadata during config saves.

## 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 #67893. Verify it addresses your case.
- **Recommended:** read PR #67893 (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-67893`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #67841: \[Bug\]: CLI startup prewarm rewrites custom_providers.models and destroys per-model metadata

## Prior & competing PRs

- **#67878: fix(model-switch): preserve per-model metadata dict in _save_discovered_models_to_config (#67841)**. closed without merge · fix tier `suggested`
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#67893`, `#67841`
- **#67893: fix(model-switch): preserve per-model metadata in _save_discovered_models_to_config (#67841)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/kshitij@users.noreply.github.com`, `hermes_cli/model_switch.py`, `tests/hermes_cli/test_model_switch_custom_providers.py`
- **#67926: fix(cli): keep picker prewarm read-only w.r.t. config.yaml (#67841)**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `311bacb57`, `2ae195673`, `#67841`, `#67893`

## Fix status

- Merged to main in PR #67893 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-07-20`.
- Subsystem: `hermes_cli`