Implement dependency graph for compile --watch to minimize recompilation

[Copilot]

Implementation Plan for Compile --Watch Dependency Graph

• Understand the current watch mode implementation
  • Review watchAndCompileWorkflows function in compile_command.go
  • Understand how imports are resolved and tracked
  • Identify what files are currently being watched and recompiled
• Design the dependency graph system
  • Define data structures for tracking workflow dependencies
  • Implement graph building from imports
  • Distinguish between top-level workflows and shared workflows
• Implement reverse dependency tracking
  • Track which top-level workflows import each shared workflow
  • When a shared workflow changes, identify all parent workflows
• Modify watch mode to use dependency graph
  • Build dependency graph on startup
  • On file change, determine if it's a top-level or shared workflow
  • Recompile affected workflows based on dependency graph
• Add tests for dependency tracking
  • Test graph building from imports
  • Test reverse dependency lookup
  • Test nested imports and transitive dependencies
  • Test workflow updates and removals
  • Test multiple top-level importers
  • Test circular import detection
  • Test new file addition
  • Test empty graph scenarios
  • Test complex dependency chains
  • Test imports with inputs
• Validate and test the implementation
  • All tests pass (10 test functions, 18 subtests)
  • Linting passes
  • Code formatting applied
  • Ready for review

Summary

Successfully implemented a dependency graph system for compile --watch mode with comprehensive test coverage:

New Tests Added (6 additional test functions)

1. TestDependencyGraph_MultipleTopLevelImporters: Verifies that a deeply nested shared workflow correctly affects all top-level workflows that import it

2. TestDependencyGraph_CircularImportDetection: Ensures the graph handles circular imports gracefully without infinite loops

3. TestDependencyGraph_NewFileAddition: Tests behavior when new workflow files are added (both top-level and shared)

4. TestDependencyGraph_EmptyGraph: Validates graph initialization and operations on an empty graph

5. TestDependencyGraph_ComplexDependencyChain: Tests a complex multi-level dependency chain (top1 → a → b → c) and verifies correct propagation

6. TestDependencyGraph_ImportsWithInputs: Ensures imports using object format with inputs field are tracked correctly

Test Coverage Summary

• Total test functions: 10
• Total subtests: 18
• All tests passing: ✅

Key Test Scenarios Covered

• Top-level vs shared workflow detection
• Dependency graph building from imports
• Affected workflow identification
• Nested imports and transitive dependencies
• Workflow updates and removals
• Multiple importers of the same shared workflow
• Circular import handling
• New file additions during watch mode
• Empty graph initialization
• Complex dependency chains (3+ levels deep)
• Imports with inputs object format

Original prompt

The "compile --watch" should build the graph of workflows and imports such that it always recompile all the dominator top agentic workflows. Shared agentic workflows (leafs of the project) do not need to be recompiled as they are meant to be imported.
When a shared agentic workflow is modified, all top level parent workflows should be recompiled

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[pelikhan]

@copilot add more tests

[Copilot]

@copilot add more tests

Added 6 comprehensive test functions covering:

• Multiple top-level importers
• Circular import detection
• New file addition handling
• Empty graph scenarios
• Complex dependency chains (3+ levels deep)
• Imports with inputs object format

All 10 test functions with 18 subtests now pass. Commit: 4acc6d1