Tactic: Checkpoint and Recover

Tactic: Checkpoint and Recover

Orchestration Pattern

FUNCTION checkpoint_and_recover(task, execute_fn):
    // Pre-execution checkpoint
    checkpoint = {
        timestamp: now(),
        task_id: task.id,
        state: capture_current_state(),
        files_modified: [],
        outputs_produced: []
    }
    save_checkpoint(checkpoint)
    
    TRY:
        // Execute with monitoring
        monitor = SPAWN execution-monitoring(task)
        result = execute_fn(task)
        
        // Post-execution validation
        IF monitor.anomalies_detected:
            RAISE AnomalyError(monitor.anomalies)
        END
        
        // Validate result integrity
        validated = SPAWN result-collection(result, task.success_criterion)
        
        IF validated.complete AND validated.consistent:
            // Success — archive checkpoint (keep for audit trail)
            archive_checkpoint(checkpoint)
            RETURN {status: DONE, result: validated}
        ELSE:
            // Partial success — decide whether to keep or rollback
            IF validated.partial_value > threshold:
                archive_checkpoint(checkpoint)
                RETURN {status: PARTIAL, result: validated, missing: validated.gaps}
            ELSE:
                restore_state(checkpoint)