# NousResearch/hermes-agent · fallback_model config format parsing and validation fixes

## Open now

- Nothing open on GitHub.

A bug in v0.60 caused fallback_model configuration to break when stored as a list or non-dict YAML shape, leading to 401 errors and AttributeErrors. These members address guarding and validating the fallback_model field across the CLI config save path and validator.

## 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 #14258. Verify it addresses your case.
- **Recommended:** read PR #14258 (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: `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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.67`: 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

- #4091: \[Bug\]: fallback_model config format broken in v0.60 — manual config editing causes 401/AttributeError

## Prior & competing PRs

- **#14258: fix(cli): guard fallback_model against non-dict YAML shapes in save_config (salvage #5035)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `hermes_cli/config.py`, `scripts/release.py`
- **#5035: fix(cli): guard fallback_model list format in save_config_value**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#14258`

## Fix status

- Merged to main in PR #14258 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-04-23`. This confirmation is old and may be out of date (a revert/reopen would not have invalidated it here); re-verify.
- Subsystem: `hermes_cli`