Rdm Implement

Implement a phase from an rdm roadmap. $ARGUMENTS should be <roadmap-slug> [phase-number].

Steps

1. Parse arguments: extract the roadmap slug and optional phase number from $ARGUMENTS.
2. Find the phase: if no phase number was given, run rdm phase list --roadmap <slug> --project oidc-provider and pick the first not-started or in-progress phase.
3. Read the phase: rdm phase show <phase> --roadmap <slug> --project oidc-provider to get full context, steps, and acceptance criteria.
4. Mark in-progress: rdm phase update <phase> --status in-progress --no-edit --roadmap <slug> --project oidc-provider
5. Enter plan mode: use the EnterPlanMode tool to switch into planning mode.
6. Create an implementation plan using the planning tool. The plan should:
   • Break the phase into concrete implementation steps based on the phase description and acceptance criteria
   • Include a final step: "Review changes with user and commit"