Cost tracking infrastructure works but has no data source:
- Claude Code displays costs in TUI status bar, not scrollback
- tmux capture-pane can't see TUI chrome
- All sessions show $0.00
Changes:
- Mark gt costs command as [DISABLED] with deprecation warnings
- Mark costs-digest patrol step as [DISABLED] with skip instructions
- Document requirement for Claude Code to expose CLAUDE_SESSION_COST
Infrastructure preserved for re-enabling when Claude Code adds support.
Ref: GH#24, gt-7awfjq
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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