[Bug] Task tools (TaskCreate/TaskUpdate/TaskGet/TaskList) missing entirely in session despite config enabling them — v2.1.217

Bug Description
Environment: - Claude Code version: 2.1.217 - OS: Windows 11 Home (10.0.26200) - Launch method: custom .bat wrapper (claude.exe --permission-mode acceptEdits %*), not a child/sub-session - Models tested: Opus 4.8 (1M) and Sonnet 5 — same result on both, within the same session Expected behavior: Per changelog, TodoWrite was removed in v0.2.82 and replaced by TaskCreate / TaskUpdate / TaskGet / TaskList as of v2.1.142+. My config explicitly enables this: - ~/.claude/settings.json: "todoFeatureEnabled": true, "env": {"CLAUDE_CODE_ENABLE_TASKS": "1"} - permissions.allow includes TaskCreate, TaskGet, TaskList, TaskUpdate, TaskOutput, TaskStop - Launcher script also sets CLAUDE_CODE_ENABLE_TASKS=1 So TaskCreate/TaskUpdate/TaskGet/TaskList should be available as tools in this session. Actual behavior: None of TaskCreate, TaskUpdate, TaskGet, TaskList appear — not as directly callable tools, and not even in the deferred-tools list (confirmed via explicit lookup, which returned "No matching deferred tools found"). Only TaskOutput and TaskStop are present (deferred), alongside Agent/Workflow/Monitor. Switching model mid-session (Opus → Sonnet) did not change this, ruling out model-tier gating. Suspected cause: Possibly related to #23874 (Task tools disabled by an isTTY check in the VSCode extension) — this may be a broader detection issue affecting native Windows CLI sessions too, not just the VSCode extension, since Bash tool calls in this session are piped through git-bash which may confuse TTY/environment detection. Steps to reproduce: 1. On Windows, launch claude.exe --permission-mode acceptEdits from a .bat script (not directly from an interactive shell). 2. Confirm ~/.claude/settings.json has todoFeatureEnabled: true and env.CLAUDE_CODE_ENABLE_TASKS: "1". 3. In-session, check available tools — TaskCreate/TaskUpdate/TaskGet/TaskList are absent entirely, even in the deferred-tools registry.

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.1.217
• Feedback ID: 40a31f21-eea3-4870-8125-e89c2e30a56e

Errors

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