fix(chat): preserve markdown when copying messages

[j15z]

Summary

• Preserve Markdown formatting when copying chat messages, including fenced code blocks and language labels
• Convert visible workspace resources into portable Markdown links using resolved resource IDs

Type of Change

• Bug fix

Testing

• Focused chat copy, resource resolution, and Markdown mention tests
• bun run type-check
• bun run lint:check
• bun run lint
• bun run check:audits
• Block registry audit against origin/staging

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Aug 21, 2026 3:25am

[cursor]

PR Summary

Low Risk
Clipboard/copy-path change only; no auth, persistence, or message-send behavior is modified.

Overview
Copying a chat message now keeps Markdown (headings, emphasis, fenced code with language) instead of flattening it to plain text.

Copy uses the same visible transcript tree as the UI (getRenderableMessageText), strips internal tags, and turns workspace resource chips into portable sim: mention links with resolved IDs. Mention serialization is centralized in toSimMarkdownLink.

Home and the workflow copilot panel pass workspace files into chat so file mentions can resolve on copy.

^{Reviewed by Cursor Bugbot for commit c943386. Bugbot is set up for automated code reviews on this repo. Configure here.}

[greptile-apps]

Greptile Summary

The PR preserves assistant-message Markdown during copying and converts parsed workspace resources into portable sim: links.

• Shares workspace-resource label and spacing logic between rendering and copy preparation
• Builds copy content from the rendered message-segment tree
• Adds regression coverage for Markdown, special tags, and resource conversion

Confidence Score: 4/5

The PR is not yet safe to merge because visible file-resource links can still be dropped from copied Markdown while resource metadata is unavailable.

File resource conversion depends on the asynchronously loaded workspace-file list and falls back to bare text whenever resolution misses, leaving the previously reported link-preservation failure reachable.

Files Needing Attention: apps/sim/app/workspace/[workspaceId]/home/components/mothership-chat/copyable-markdown.ts and apps/sim/app/workspace/[workspaceId]/home/home.tsx

Important Files Changed

Filename	Overview
apps/sim/app/workspace/[workspaceId]/home/components/mothership-chat/copyable-markdown.ts	Introduces Markdown-preserving copy serialization, but unresolved visible file resources still lose their links.
apps/sim/app/workspace/[workspaceId]/home/components/mothership-chat/mothership-chat.tsx	Connects rendered message text and workspace-file metadata to the copy action.
apps/sim/app/workspace/[workspaceId]/home/components/message-content/message-content.tsx	Extracts copyable text from the same visible segment tree used by transcript rendering.
apps/sim/app/workspace/[workspaceId]/home/components/message-content/components/chat-content/workspace-resource-markdown.ts	Centralizes workspace-resource labels, display links, and inline spacing behavior.
apps/sim/app/workspace/[workspaceId]/components/message-actions/message-actions.tsx	Replaces plain-text stripping with injectable Markdown copy preparation.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[Rendered assistant message] --> B[getRenderableMessageText]
  B --> C[sanitize and parse special tags]
  C --> D{Workspace resource?}
  D -->|No| E[Preserve Markdown text]
  D -->|Yes| F[Resolve canonical resource ID]
  F -->|Resolved| G[Portable sim Markdown link]
  F -->|Unresolved| H[Bare label]
  E --> I[Clipboard]
  G --> I
  H --> I

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[j15z]

@greptile

[j15z]

@cursor review

[j15z]

@greptile

[j15z]

@cursor review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

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[j15z]

@cursor review

[j15z]

@greptile

[greptile-apps]

Unresolved file links are dropped

When a message is copied before the workspace-file query contains a matching file, resolveWorkspaceResourceRef returns no resource and this branch serializes the visible file reference as its bare label, causing the copied Markdown to lose the resource link and destination.

[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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[cursor]

Escaped links break chat paste

Medium Severity

Copied resources are serialized with toSimMarkdownLink, which backslash-escapes \, [, and ] in labels. The chat composer’s parseChipLinks expects unescaped [label](sim:kind/id) links and does not unescape. Titles with those characters therefore fail to round-trip into chips on paste, even though the PR presents these links as the portable chat format.

Additional Locations (1)

• apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/rich-markdown-editor/mention/sim-link.ts#L12-L16

 

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