Test
e00762bb0b
- Add internal/graph package for dependency management - Implement DependencyGraph for task ordering - Support task dependencies and prerequisite tracking - Validate graph for cycles (no circular dependencies) - Topological sort for execution order (Kahn's algorithm) - Track task status (pending, completed, failed) - Get ready-to-execute tasks based on dependencies - Get tasks that depend on a given task - Check if task can execute (all deps complete) - Calculate critical path through graph - Task metadata support - 23 graph tests, all passing Features: - AddTask() - add task to graph - AddDependency(dependent, prerequisite) - specify ordering - ValidateGraph() - check for cycles - GetTopologicalOrder() - execution order - GetReadyTasks() - tasks ready to run - MarkCompleted(taskID) - mark as done - MarkFailed(taskID) - mark as failed - GetDependencies(taskID) - what task depends on - GetDependents(taskID) - what depends on task - CanExecuteTask(taskID) - check if ready - GetCriticalPath() - longest path in graph Graph Properties: - Directed acyclic graph (DAG) - Cycle detection (prevents deadlocks) - Multi-dependency support (diamond dependencies) - Status tracking (pending/completed/failed) - Thread-safe (RWMutex) - Kahn's algorithm for topological sort - O(V+E) for validation and sorting Example Usage: - T0.1 Analyze (no deps) - T0.2 Implement (depends on T0.1) - T0.3 Test (depends on T0.2) - T0.4 Review (depends on T0.2, T0.3) Ready Detection: - T0.1 ready (no dependencies) - After T0.1 complete: T0.2 ready - After T0.2 complete: T0.3 ready - After T0.2, T0.3 complete: T0.4 ready Test Coverage: - 23 dependency graph tests - Cycle detection verified - Topological sort tested - Multiple dependency chains - Diamond dependency patterns - Ready task calculation - Status tracking - Critical path calculation - Complex graphs (10+ tasks) - Metadata handling - Performance benchmarks Performance: - Cycle detection: O(V+E) DFS - Topological sort: O(V+E) Kahn's algorithm - Ready tasks: O(V) scan - Add task: O(1) - Add dependency: O(1) amortized Use Cases: - Workflow orchestration (T0.1 -> T0.2 -> T0.3 -> ...) - CI/CD pipelines (build -> test -> deploy) - Milestone hierarchies (T0 milestone with sub-tasks) - Parallel tasks with merge points (diamond deps) Next: T3.4 (Human-in-the-loop gates)