Drive Execution

Drive Execution

Orchestrate the implementation of a plan by dispatching subagents for each task, enforcing test-first discipline, and reviewing completed work before advancing. This skill is the execution coordinator -- it does not write code itself.

Process Flow

digraph drive_execution {
    "Read plan" [shape=box];
    "Initialize workflow state" [shape=box];
    "Select next task" [shape=box];
    "Check dependencies met" [shape=diamond];
    "Dispatch implementer" [shape=box];
    "Implementer works\n(prove-first enforced)" [shape=box];
    "Dispatch quality-auditor" [shape=box];
    "Review passes?" [shape=diamond];
    "Mark task complete" [shape=box];
    "More tasks?" [shape=diamond];
    "Invoke confirm-complete" [shape=doublecircle];

    "Read plan" -> "Initialize workflow state";
    "Initialize workflow state" -> "Select next task";
    "Select next task" -> "Check dependencies met";
    "Check dependencies met" -> "Select next task" [label="blocked, try another"];
    "Check dependencies met" -> "Dispatch implementer" [label="ready"];
    "Dispatch implementer" -> "Implementer works\n(prove-first enforced)";
    "Implementer works\n(prove-first enforced)" -> "Dispatch quality-auditor";
    "Dispatch quality-auditor" -> "Review passes?";
    "Review passes?" -> "Dispatch implementer" [label="no, fix issues"];
    "Review passes?" -> "Mark task complete" [label="yes"];
    "Mark task complete" -> "More tasks?";
    "More tasks?" -> "Select next task" [label="yes"];
    "More tasks?" -> "Invoke confirm-complete" [label="no"];
}

Checklist

1. Read the plan document and understand all tasks, their order, and dependencies
2. Deploy the dependency-mapper agent to trace the impact of planned changes across the codebase. Use the impact analysis to anticipate side effects before implementation begins.
3. Initialize workflow state -- update .forge/forge-state.json with current phase, total tasks, and task statuses
4. For each task (in dependency order): a. Verify all dependency tasks are complete b. Prepare task context: task description, relevant spec sections, file paths, verification criteria c. Dispatch a fresh implementer subagent with the task context d. The implementer follows prove-first discipline (test before code) e. When the implementer finishes, dispatch the quality-auditor agent to review f. If review raises concerns, dispatch the implementer again with the feedback g. When review passes, mark the task complete in workflow state h. Run the task's verification command to confirm
5. Identify parallel opportunities -- if independent tasks exist, dispatch multiple implementers concurrently. Each parallel agent gets its own complete context (do not assume shared knowledge between agents). After parallel tasks complete, run a cross-task consistency check before proceeding.
6. Update progress after each task -- track completed/total in .forge/forge-state.json
7. When all tasks complete, invoke confirm-complete for end-to-end verification

Implementer Status Handling

When the implementer reports back, handle based on status:

Subagent Context Template

When dispatching an implementer, provide exactly this context:

Task: [task number and title]
Description: [from plan]
Files to modify: [from plan]
Verification: [from plan]

Relevant spec sections:
[paste relevant sections from the design spec]

Constraints:
- Write tests BEFORE implementation code (prove-first discipline)
- Run verification command when done
- Commit working code with a descriptive message

Anti-Patterns

"I'll implement this task myself instead of dispatching" The orchestrator must not implement. Mixing coordination and implementation pollutes the orchestrator's context and creates blind spots in review.

"Let me batch all tasks and review at the end" Review after every task, not after all tasks. Catching a design flaw in task 2 is cheap. Catching it after task 8 is expensive.

"The implementer is stuck, I'll take over" If the implementer is stuck, the task description is probably unclear. Improve the task description and re-dispatch. Taking over defeats the isolation benefit.

Evidence Requirements

• .forge/forge-state.json shows all tasks with status "complete"
• Each task's verification command has been run and passed
• Quality-auditor has reviewed each task

Transition

When all tasks are complete and individually verified, invoke confirm-complete for end-to-end verification.