Plan integration 5: Add MCP progression and deletion

[NetDevAutomate]

Parent

• Integrate Study Plans across Now, Web architect, and MCP #7 — Integrate Study Plans across Now, Web architect, and MCP

What to build

Let an MCP agent progress milestones, preview or record evidence checkpoints, and explicitly delete a plan without unsafe retry or partial-success behavior.

Acceptance criteria

• Register set_study_plan_milestone, evaluate_study_plan, and delete_study_plan.
• Milestone changes accept an explicit done value and remain idempotent under retries.
• Evaluation distinguishes preview from record and accepts an optional study identifier.
• Partial checkpoint writes return explicit warnings and never claim complete recording.
• Deletion requires explicit confirmation and retains checkpoint history.

Blocked by

• Plan integration 4: Add MCP discovery and authoring #11 — Plan integration 4: Add MCP discovery and authoring

Definition of Done

• All nine Study Plan lifecycle tools appear in the real stdio tool list.
• Integration tests exercise milestone, evaluation, partial recording, and confirmed deletion journeys.
• Tool errors are mapped from shared domain outcomes.
• MCP lifecycle documentation is complete and examples use retry-safe operations.
• Existing MCP and plan suites remain green.