feature-marker for Codex

Use this skill from inside Codex prompts:

Use feature-marker to implement billing-observability.

Run the complete flow by default:

• Create or reuse tasks/{slug}/prd.md, tasks/{slug}/techspec.md, and

tasks/{slug}/tasks.md.

• Use the bundled templates in templates/ for PRD, TechSpec, and Tasks; fill

{slug} and {feature_title} and leave no unresolved placeholders.

• Create or require a feature branch before implementation.
• Use a git worktree only when the checkout is dirty or the user asks.
• Run an implementation grill pass before coding to find artifact, task, test,

risk, and handoff gaps.

• Resolve grill findings in the artifacts, asking the user only when a finding

changes scope or requires a product decision.

• Stop only for true ambiguity, unrelated dirty work, or blocked verification.
• Run verification, commit locally, and print exact push/PR handoff commands.
• Do not push, open a PR, create checkpoint JSON, or use an interactive menu.

spec-driven and ralph-loop are out of scope for this skill-first v1 unless they are rebuilt as explicit skill instructions.