CLI rejects --session-id flag: 'unknown option --session-id'

Description

Running claude --session-id <uuid> sometimes fails with:

error: unknown option '--session-id'

Despite claude --help listing --session-id <uuid> as a valid option.

Environment

• Claude Code: @anthropic-ai/claude-code@2.1.79 (latest, installed via npm)
• macOS Darwin 25.3.0
• Node: v20.20.0 (via nvm)
• Terminal: cmux (Ghostty-based terminal that wraps the claude command to inject --session-id for session tracking)

Context

The cmux terminal app uses a shim that calls:

claude --session-id <uuid> --settings '{"hooks":{...}}'

This works from some terminal contexts but fails from fresh terminal tabs with the unknown option error. Running the exact same command manually with a valid UUID works fine:

claude --session-id "97cb65d0-4972-479c-92d7-11df15dcaaad" --print "hello"
# Returns: Error: Invalid session ID. Must be a valid UUID.
# (correctly validates UUID format rather than rejecting the flag)

Steps to reproduce

1. Install Claude Code via npm: npm install -g @anthropic-ai/claude-code
2. Open a new terminal
3. Run: claude --session-id "$(uuidgen | tr '[:upper:]' '[:lower:]')"
4. Sometimes works, sometimes returns error: unknown option '--session-id'

This may be a Commander.js parsing issue or a timing/initialization issue where the CLI hasn't registered all options before parsing argv.