Start an initiative

Output contract: Collect every required choice explicitly; never infer or preselect; preserve errors, artifacts, and next actions. For suggested actions, pair Shell with the returned Copilot command; honor commandGuidance. If absent, say "Copilot: no verified equivalent"; never invent a slash command.

Boundary: no Story required; cwd=opened Git root or verified repositoryPath from singularity-flow workspace current --json; refuse if neither resolves; never search $HOME/parents.

Keep every choice and confirmation inside GitHub Copilot.

1. Require an initiative or Jira ID. Check that singularity/portfolio.yml exists and run singularity-flow initiative profiles --json.
2. Run singularity-flow initiative choices begin start <INIT-ID> --json.
3. Present the returned initiative-profile choice with Copilot's ask_user. Never infer or silently default the profile. The selected profile's first phase activates its governed agent automatically.
4. Record each exact answer with singularity-flow initiative choices answer <TOKEN> <CHOICE-ID> <SELECTED-ID> --json.
5. After the receipt reports ready: true, run singularity-flow initiative start <INIT-ID> --selection-receipt <TOKEN> with the user's Jira, title, and description arguments.
6. The CLI creates the exact initiative branch, snapshots the portfolio/profile, commits, and pushes. Do not create or switch branches manually.
7. Show the complete phase flow, profile, current phase, commit, publication result, and next action. Recommend /sf-initiative-documents after phase preparation.

If ask_user is unavailable or disabled, stop without mutation. Never substitute public --profile or --agent flags; they intentionally do not exist.