[sox8502]

Local Markdown links written as Windows drive paths or local file:// URLs now open OpenResearch's file viewer instead of another copy of the chat. Empty, rejected, and handlerless local links render as plain text; browser URL sanitization stays enabled.

Closes #711.

Verification:

• UI build, typecheck, and 426 UI tests, including native-path and rendered-anchor regressions.
• macOS in-app checks: PDF/text file URLs, document preview links, and inert rejected/empty destinations.
• Rust formatting, clippy, locked build, and locked tests (1,249 unit and 19 integration tests passed; 3 unit tests ignored).
• Windows Server and Ubuntu backend checks with hash-verified candidate UI: PDF/text file URIs, Windows drive paths, Markdown document links, and inert rejected/empty destinations; screenshots captured through Codex’s macOS in-app browser.
• Greptile review of 9769a9f, with 5/5 confidence and no actionable findings.
• Original reporter's Windows 11 / Antigravity-generated transcript (original link unavailable).

The change covers shared Markdown links. Artifact-renderer local-link support, embedded file:// images, and network shares remain separate.

[sox8502]

@greptileai review

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no actionable issues were found.

Summary

Routes Windows drive paths and local file:// Markdown links to the existing file viewer instead of opening another chat.

• Local Markdown file links open in the file viewer instead of another chat.

Tests and browser checks were not rerun during this review.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  A[Markdown link] --> B[Save local destination separately]
  B --> C[Sanitize browser URL]
  C --> D{Recognized local file?}
  D -->|Yes| E{Valid path and file handler?}
  E -->|Yes| F[Open file viewer]
  E -->|No| G[Render plain text]
  D -->|No| H{Browser URL remains?}
  H -->|Yes| I[Render browser link]
  H -->|No| G

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_{Reviews (2) · Last reviewed commit: "Fix local Markdown file links opening du..." · Reviewed by Greptile}