feat: fully flesh out VS Code extension with all RPC features
GsdClient — expose all 25 RPC commands:
- Prompting: steer, followUp
- Thinking: setThinkingLevel, cycleThinkingLevel
- Compaction: compact, setAutoCompaction
- Retry: setAutoRetry, abortRetry
- Bash: runBash, abortBash
- Session: getSessionStats, exportHtml, switchSession, setSessionName,
getMessages, getLastAssistantText, getCommands
- Model: cycleModel
Extension — register 15 commands with full UI:
- switchModel (QuickPick with context windows)
- setThinking (QuickPick off/low/medium/high)
- sessionStats (formatted token/cost display)
- exportHtml (save dialog)
- steer/runBash (input boxes)
- listCommands (QuickPick, select to execute)
- Keybindings: ctrl+shift+g chords for new session, cycle model, cycle thinking
- Config: gsd.autoStart, gsd.autoCompaction
Sidebar — full dashboard:
- Thinking level badge and toggle
- Token usage (input/output) and cost from session stats
- Streaming spinner indicator
- Model selector and quick action buttons (compact, export, abort)
- Auto-compaction toggle
- 10s periodic refresh for live stats
Chat participant — enhanced event handling:
- Tool-specific details (file paths, bash commands, grep patterns)
- Thinking block display
- Token usage summary at end of each response
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