[FEATURE] Add --voice CLI flag to enable voice mode at startup

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Voice mode cannot be activated programmatically when launching Claude Code. Even with "voiceEnabled": true in ~/.claude/settings.json, new interactive sessions launched with a positional argument prompt do not start with voice active. The only way to enable it is manually typing /voice after the session starts, which breaks automated and hands-free workflows.

Proposed Solution

Add a --voice CLI flag that enables voice mode immediately when Claude starts:

claude --voice "Review today's morning brief..."

Claude launches in interactive mode with voice already active — no manual toggle needed. This flag should work alongside other flags like --dangerously-skip-permissions.

Alternative Solutions

Respect the "voiceEnabled": true setting in ~/.claude/settings.json for all new sessions, including those launched with a positional argument. If voice is globally enabled, it should be active by default without requiring a per-session toggle.

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

I run a personal EA (executive assistant) system with 8 scheduled cron tasks (morning briefs, EOD wraps, weekly plans, inbox triage, etc.). When a task completes, a notification script opens a new terminal window with Claude in interactive mode to review the results:

ptyxis -- bash -c "claude --dangerously-skip-permissions \"$PROMPT\"" &

The intent is a low-friction review experience — the window pops up with the brief already processed, and I can respond verbally via voice input instead of typing. But without a --voice flag, I have to manually type /voice every time a scheduled task fires before I can speak, which adds unnecessary friction to the automated workflow.

Additional Context

• Claude Code version: v2.1.77
• Platform: Linux (Fedora 43), cron-based automation with ptyxis terminal
• Current behavior: /voice toggle works correctly once manually activated. Voice functions perfectly for the rest of the session after toggling.
• Settings state: "voiceEnabled": true is set globally in ~/.claude/settings.json but does not carry through to sessions started with a positional prompt argument.