# NousResearch/hermes-agent · Mermaid diagram blank in desktop expand overlay

## Open now

- Nothing open on GitHub.

These issues and fixes address a bug where clicking a Mermaid diagram to expand it on desktop shows a blank or improperly sized overlay. The work focuses on giving diagrams correct sizing in the expand overlay and on copy.

## 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 #90542. Verify it addresses your case.
- **Recommended:** read PR #90542 (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-90542`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #82836: \[Bug\] Desktop: clicking a mermaid diagram to expand shows a blank dialog

## Prior & competing PRs

- **#90542: fix(desktop): mermaid full-view overlay was blank (supersedes #88616, #83271)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `apps/desktop/src/components/assistant-ui/embeds/mermaid-embed.tsx`, `apps/desktop/src/components/ui/zoomable.test.tsx`, `apps/desktop/src/components/ui/zoomable.tsx`, `apps/desktop/src/lib/svg-image.test.ts`, `apps/desktop/src/lib/svg-image.ts`
- **#83271: fix(desktop): give mermaid diagrams a real size in the expand overlay and on copy**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#90542`, `#88616`

## Fix status

- Merged to main in PR #90542 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-08-20`.
- Subsystem: `apps/desktop`