v4.1.7 — Opus 5.5, Windows system prompt fix, Todo checklist restored

Highlights

Added

• Opus 5.5 model support — claude-opus-5-5 (latest Opus flagship, 1M context, $4/$20; requires CLI >= 2.1.280), with [1m] context injection
• Todo checklist restored on new models — since CLI 2.1.233 task-list tools are omitted on Opus 4.8+, Sonnet 5, Fable 5+. The CLI is now spawned with CLAUDE_CODE_ENABLE_TODO_TOOLS=1 + CLAUDE_CODE_ENABLE_TASKS=0 (your own values win), bringing back the "Update Todos" card
• Task Tracking prompt — asks the model to keep a checklist for tasks with 3+ steps (skipped for simple questions); wording follows the tools actually enabled
• New CLI tools recognized — icons and status text for PowerShell, LSP, Monitor, Workflow, TaskCreate/Update/List/Get, SendMessage, ListAgents, Cron*, ScheduleWakeup, PushNotification, SendUserFile, MCP helper tools

Fixed

• Appended system prompt never reached the model on Windows — Node's shell: true spawn joined args without quoting, cutting the multi-line prompt down to #. The v4.1.5 headless runtime constraints and all MCP usage prompts were silently dropped on Windows. Now passed via --append-system-prompt-file. Applies immediately to new sessions; existing sessions pick it up after their next compaction
• DEP0190 warning removed; launching now works when claude.cmd or the MCP config path contains spaces
• Sonnet 5 fallback pricing corrected to $2/$10 (statistics estimates only)

Changed

• TaskOutput (removed in CLI 2.1.277) dropped from the tool list; old sessions still render it

Install

• VS Code Marketplace: search "Claude Code ChatUI" or update in place
• VSIX: download claude-code-chatui-4.1.7.vsix below → Ctrl+Shift+P → "Extensions: Install from VSIX..."