Harry Bayliss c120342709 Clear TODO backlog: --debug/--profile, codex selection, MCP orientation, perf ...

- Add --debug[=DIR] / --profile[=DIR] flags that write run artefacts
  (patterm.log, events.jsonl, per-child raw PTY captures, CPU + heap
  + goroutine pprof) to a dir without polluting stdout/stderr.
- Strengthen vendor-TUI orientation in three places (MCP
  initialize.instructions, the spawn_agent tool description, and
  help('spawning')) to head off codex's habits of poking the Unix
  socket via perl and shelling out to launch peers — both bypass
  caller identity and produce orphaned top-level tabs.
- Fix click-and-drag text selection from alt-screen TUIs. Host SGR
  mouse reporting now follows the focused child's screen side
  instead of being permanently armed; alt-screen TUIs that need
  mouse re-enable it themselves and the toggle is forwarded.
- Move drawSidebar() off the per-PTY-chunk hot path. Long claude
  session resume was paying a full sidebar rebuild for every
  scrolled chunk; the chrome ticker now drains a dirty flag at 60 Hz.
- Gate the per-chunk Title() CGO poll on a containsOSC scan so
  codex/ratatui's many SGR-only chunks no longer pay a CGO call each.

2026-05-15 12:41:47 +01:00

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