[saimircelaj0]

A long raw URL can make the desktop UI stall on clicks. MarkdownExternalLinkContent inserts a <wbr> after every character in each long word. A macOS 0.1.3 trace showed roughly four-second main-thread commits with one such link mounted; removing and restoring the link removed and restored the load.

Render each long word in one inline span with overflow-wrap: anywhere instead. Keep short words intact, preserve the unbroken protocol/favicon prefix, and preserve the full text, destination, and rich children. This is a small, focused obvious-bug fix under CONTRIBUTING's prior-issue exception: it removes the unbounded element expansion without adding a feature or changing link actions.

Validation:

• Added two browser regression cases (plain and formatted link content). Both fail before the fix: growing a URL from 128 to 16,000 payload characters grows its descendant count from 152 to 16,024 (153 to 16,025 with rich children). Both pass after it, including exact text/href and wrapping inside a narrow markdown table.
• vp run check:changed passed format, lint, knip, affected-package typechecks, and both browser tests.
• Integrated Replay (dev) check using a synthetic 16,838-character URL: descendant elements 16,834 → 5, with the same text and href. Short PR and labelled links remain unchanged. Web and desktop share this component; mobile uses a separate renderer. No provider or wire-contract changes.

The screenshots and short recordings below use synthetic data. They demonstrate preserved rendering and interaction, not a controlled before/after latency benchmark. Private traces and real conversations are not included.

Before	After

Before recording · After recording

Implemented with GPT-6.1 Sol through the Codex harness in T3 Code.

[macroscopeapp]

Approvability

Verdict: Approved at ebf1f29

Macroscope's review found this PR approvable — Long Markdown link labels now use CSS wrapping instead of per-character DOM elements, reducing DOM growth. The change is confined to presentation and leaves link destinations and actions unchanged.

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