# NousResearch/hermes-agent · HTTP 422 errors from multimodal content in tool messages

## Open now

- Nothing open on GitHub.

These issues and PRs concern a bug where image or multimodal content embedded in tool messages causes HTTP 422 errors from the OpenCode Go relay, and proposed fixes to validate or veto such content before it reaches the upstream.

## 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 #106466. Verify it addresses your case.
- **Recommended:** read PR #106466 (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-106466`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #104731: \[Bug\]: HTTP 422 from Console Go relay: vision_analyze embeds image parts in tool messages the upstream rejects (messages.N.tool.content.str)

## Prior & competing PRs

- **#106466: OpenCode Go screenshots no longer kill the session on HTTP 422 (#104731, #89057, salvage #104734 #47026)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/error_classifier.py`, `contributors/emails/[redacted:email]`, `plugins/model-providers/opencode-zen/__init__.py`, `tests/plugins/model_providers/test_opencode_go_profile.py`, `tests/run_agent/test_multimodal_tool_content_recovery.py`
- **#104734: fix(providers,agent): handle strict-string tool message validation and 422 on opencode-go (#104731)**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `fd6434b3b36592367ac5faa180b905d64e29214c`, `#106466`
- **#104736: fix(providers): veto multimodal tool-result content for opencode-go (Console Go 422)**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `fd6434b3b36592367ac5faa180b905d64e29214c`, `#106466`, `#47026`, `#104734`

## Fix status

- Merged to main in PR #106466 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-09`.