# NousResearch/hermes-agent · HTTP 422 errors from screenshots killing sessions

## Open now

- Nothing open on GitHub.

These issues and PRs concern a bug where screenshots sent in tool messages cause HTTP 422 errors that are not properly classified, permanently killing the session. The work involves fixing multimodal tool content pattern matching and error classification to handle this case.

## 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 #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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.67`: 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

- #72905: Screenshot in tool message permanently kills a session: HTTP 422 is never classified, and two provider signatures are missing from _MULTIMODAL_TOOL_CONTENT_PATTERNS

## 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`
- **#73027: fix: classify 422 through multimodal-tool-content check (#72905)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `fd6434b3b36592367ac5faa180b905d64e29214c`, `#106466`, `#104734`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`.
- Subsystem: `agent`