Approve an initiative output or phase

Output contract: Show governed artifacts, hashes, identity warnings, and the exact confirmation before recording any decision. 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.

Approval authority comes from configured local Git name/email groups, not the selected agent. Report identity assurance as configured-local, never cryptographic authentication.

1. Use /sf-initiative-documents and /sf-initiative-checklist to display full outputs, exact hashes, evidence assurance/freshness, prior approvals, child milestones, and self-approval risk.
2. Run singularity-flow initiative choices begin approve <INIT-ID> <OUTPUT-ID|phase> --json.
3. Present the governed-agent choice with Copilot's ask_user; anyone may select any configured agent, but it does not grant approval authority.
4. Show the exact phase:subject confirmation option and require the reviewer to choose it explicitly. Never infer, preselect, or synthesize approval intent.
5. Record the two answers with singularity-flow initiative choices answer <TOKEN> <CHOICE-ID> <SELECTED-ID> --json.
6. Only after ready: true, run singularity-flow initiative approve <OUTPUT-ID|phase> --initiative <INIT-ID> --selection-receipt <TOKEN>.
7. Report the approved content/bundle hash, actor identity, authority group, governed agent, self-approval warning, remaining distinct approvals, advancement, commit, and push.
8. When phase approval advances the initiative, reproduce the CLI's context-boundary guidance. For new, stop and ask the contributor to run /clear followed by /sf-initiative-next; for compact, ask for /compact first. Do not author the next initiative phase in the old conversation.

If ask_user is unavailable or disabled, stop without approval. Every approval creates and pushes its own commit. Never describe self-approval as independent review.