What problem does it solve? Multi-session software projects lose engineering state when plans live only in conversation context. This Skill executes a single MINE-registered implementation plan as an immutable contract, keeping dependency checks, code changes, verification, commits, and execution-graph updates consistent and traceable across sessions and agents. ## Core Features & Use Cases - Dependency-gated execution: Resolves the requested plan ID against the execution graph, verifies all hard predecessors are ACCEPTED, and refuses to run BLOCKED, REJECTED, or already-ACCEPTED nodes. - Isolated worktree implementation: Prepares and works only on the MINE-managed plan/<id>-<slug> branch via mine plan prepare, never on stable or dev, with dirty-workspace classification and explicit-path staging. - Evidence-bound reporting: Runs required verification gates, writes an acceptance report under docs/plan/reports/, and records implementation evidence through MCP tools or the JSON CLI fallback. - Use Case: A user invokes mine-plan-exec plan03 to implement a scoped design change; the Skill checks the graph, starts the plan, edits code in the linked worktree, runs tests and linters, commits, and marks the node IMPLEMENTED for independent review. ## Quick Start Ask the agent to execute plan plan03 with mine-plan-exec and let it prepare the worktree, implement the steps, verify, and report the results.