# NousResearch/hermes-agent · Config migration bugs corrupting platform_toolsets v25–v27

## Open now

- Nothing open on GitHub.

These issues and fixes address a series of bugs in sequential config migrations (v25→v26→v27) that corrupted or silently dropped platform_toolsets data. Related changes add warnings, surface invalid values, and repair the migration logic.

## TL;DR

- 7 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 5 PR(s) closed without merging.
- A fix was merged to main in PR #52920. Verify it addresses your case.
- **Recommended:** read PR #52920 (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-52920`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.29`: 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

- #38798: bug: config migration (v25->v26) corrupts platform_toolsets, silently kills all tools

## Prior & competing PRs

- **#40191: fix(cli): repair hermes update path (venv detection, uv arity, v25→v26 migration)**. closed without merge · fix tier `suggested`
  - maintainer direction: category `uncategorized`; implication `needs_llm`
- **#52920: fix(config): surface invalid platform_toolsets instead of silently dropping tools (#38798)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `hermes_cli/config.py`, `hermes_cli/tools_config.py`, `hermes_cli/toolset_validation.py`, `tests/hermes_cli/test_tools_config.py`, `tests/hermes_cli/test_toolset_validation.py`
- **#39207: fix(config): warn on invalid platform_toolsets after migration**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#52920`, `#52920`, `#38798`
- **#39581: fix(config): preserve platform_toolsets during v25→v26 config migration (#38798)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#52920`, `#38798`, `#52920`
- **#40208: fix(cli): add missing v25->v26 and v26->v27 config migrations**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#52920`, `#38798`, `#52920`
- **#41006: Fix #38798: Add v26→27 migration to repair corrupted platform_toolsets**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#52920`, `#38798`, `#52920`

## Fix status

- Merged to main in PR #52920 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-06-26`.
- Subsystem: `hermes_cli`