Honor the Claude Code statusLine setting in Claude threads

[mckhendry]

Claude Code's statusline is a TUI footer: the CLI spawns settings.statusLine.command, pipes it JSON on stdin, renders its stdout. T3 drives the CLI under stream-json, where nothing spawns it, so my statusline doesn't exist in a T3 thread.

The ask: read statusLine.command from the settings cascade ClaudeSkills.ts already resolves, run it in the thread's cwd on payload already on the wire, and render stdout as a per-thread strip. These scripts are ANSI-heavy: map the SGR onto spans, or strip it and keep the numbers.

Related:

• [Feature]: Show the context percentage on the meter, not only in its popover #7651 (open) — context percentage on the meter face; native UI, not a user script.
• Ideas Show remaining Claude usage in the composer toolbar #8520 — Claude usage in the composer toolbar; T3-rendered quota, not the settings contract.
• Ideas Provider plan limits: show rolling Codex and Claude quota headroom #8148 — Codex and Claude quota headroom; same data, different surface.

Drafted with Claude Code (Claude Opus 5) from source and transcripts on my machine; I reviewed and posted it.