[DRAFT] feat(core): Implement parallel action execution in processActions

[wtfsayo]

Summary

This PR implements parallel action execution within the processActions() method to improve performance for multi-action responses.

Changes

Core Runtime (packages/core/src/runtime.ts)

• Execute actions within a single response batch in parallel using Promise.allSettled()
• All actions in a batch receive the same initial state snapshot
• State accumulates sequentially between response batches
• Merge all ActionResult.values after parallel batch completes
• Preserve fault tolerance: if one action fails, others still complete

Prompts (packages/core/src/prompts.ts)

• Updated messageHandlerTemplate to reflect parallel execution model
• Changed "IMPORTANT ACTION ORDERING RULES" to "IMPORTANT ACTION EXECUTION RULES"
• Clarified that actions listed in a single response execute in parallel
• Added guidance to use multi-step workflow for sequential dependencies

Action State Provider (packages/plugin-bootstrap/src/providers/actionState.ts)

• Updated JSDoc and description to clarify "previous results" refers to prior response batches, not sibling parallel actions

Tests

• Updated runtime.test.ts to match new state initialization behavior
• Updated prompts.test.ts to match new prompt text

Key Data Flow

Response 1: [action1, action2, action3]
  ├─> Execute ALL in parallel with initialState
  ├─> Wait for all to complete
  └─> Merge results → accumulatedState

Response 2: [action4, action5]
  ├─> Execute ALL in parallel with accumulatedState from Response 1
  ├─> Wait for all to complete
  └─> Merge results → new accumulatedState

Testing

• All existing runtime tests pass
• All prompt tests pass
• All multi-step workflow tests pass
• Action chaining tests pass

Breaking Changes

None - backward compatible. Actions that previously assumed sequential execution within a batch will now run in parallel, but since they all receive the same state snapshot, behavior should be equivalent for independent actions.

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Note

Execute actions in a response batch in parallel with a shared state snapshot, accumulate results across batches, and introduce AsyncLocalStorage-based prompt tracking with prompt/provider/test updates.

• Core (runtime.ts):
  • Parallelize processActions per response using Promise.allSettled(); each batch shares a composed state snapshot; accumulate ActionResult.values and plan state between batches.
  • Add robust action resolution (exact/fuzzy/similes), error paths for missing action/handler, and consistent action memory/logging.
  • Preserve legacy returns (void/boolean) as completed; treat { success:false } (including minimal/error-only) as failed.
  • Merge working memory with size cap; cache action_results; update action plan immutably per step.
  • Introduce AsyncLocalStorage context: ActionContextStore, getCurrentActionContext, and browser fallback createBrowserFallback for prompt collection; include action context in useModel logs; skip collecting TEXT_EMBEDDING prompts.
• Prompts (prompts.ts):
  • Update messageHandlerTemplate for parallel execution model and guidance on multi-step dependencies.
• Provider (plugin-bootstrap/actionState.ts):
  • Clarify description/docs: "previous results" are from prior response batches; parallel actions share the same snapshot.
• Tests:
  • Expand runtime.test.ts: parallel execution behavior, action result status semantics, prompt collection/isolation via AsyncLocalStorage, browser fallback behavior, exact vs fuzzy action matching.
  • Update prompts.test.ts for new execution rules and wording.

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[claude]

Claude finished @wtfsayo's task —— View job

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Code Review Analysis

Todo List:

• Read and analyze core runtime changes
• Review test coverage and implementation
• Check TypeScript types and error handling
• Verify no breaking changes or security issues
• Check adherence to repo patterns and tools
• Provide actionable feedback

Review Results

❌ CRITICAL: Excessive any type usage → Fix: Replace all any types with specific TypeScript types

• packages/core/src/runtime.ts: Found 45+ instances of any type usage
• Lines 233, 257, 441, 661, 741, 755, 762, 969, 1217, 1569-1744, and many others
• This violates the "no any" rule and reduces type safety

⚠️ IMPORTANT: Missing error handling validation → Fix: Add comprehensive error handling tests

• The parallel execution lacks specific tests for error scenarios during parallel action execution
• Need tests for when one action fails while others succeed in the same batch
• Should test Promise.allSettled error isolation behavior

⚠️ IMPORTANT: Browser fallback has known limitations → Fix: Add clear warnings in documentation

• Lines 35-41: Browser fallback cannot provide true async context isolation
• The current implementation warns at runtime but should be documented clearly
• Consider more robust browser detection/handling

💡 SUGGESTION: Add timeout protection for parallel actions → Consider: Implementing per-action timeouts

• Parallel actions could potentially hang indefinitely without timeout protection
• Current implementation relies on individual action timeout handling only

💡 SUGGESTION: Improve AsyncLocalStorage type safety → Consider: Stricter typing for ActionContextStore

• The browser fallback and real AsyncLocalStorage should share stricter type constraints
• Current IAsyncLocalStorage<T> interface could be more type-safe

Positive Findings

✅ Good test coverage - Comprehensive tests for parallel execution and prompt isolation
✅ Proper use of bun test - All tests use bun test framework correctly
✅ No security issues - No hardcoded credentials or injection vulnerabilities
✅ Error isolation - Uses Promise.allSettled correctly for fault tolerance
✅ State management - Proper state snapshot sharing and accumulation between batches

Main Issue

The excessive use of any types throughout the codebase is the primary blocker. This needs to be addressed before merge as it violates TypeScript best practices and the repository's coding standards.

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✨ Finishing touches

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• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/parallel-action-execution

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[claude]

Claude finished @wtfsayo's task —— View job

---

Code Review Analysis

Todo List:

• Read and analyze core runtime changes
• Review test coverage and implementation
• Check TypeScript types and error handling
• Verify no breaking changes or security issues
• Check adherence to repo patterns and tools
• Provide actionable feedback

Review Results

❌ CRITICAL: Excessive any type usage → Fix: Replace all any types with specific TypeScript types

• packages/core/src/runtime.ts: Found 45+ instances of any type usage
• Lines 233, 257, 441, 661, 741, 755, 762, 969, 1217, 1569-1744, and many others
• This violates the "no any" rule and reduces type safety

⚠️ IMPORTANT: Missing error handling validation → Fix: Add comprehensive error handling tests

• The parallel execution lacks specific tests for error scenarios during parallel action execution
• Need tests for when one action fails while others succeed in the same batch
• Should test Promise.allSettled error isolation behavior

⚠️ IMPORTANT: Browser fallback has known limitations → Fix: Add clear warnings in documentation

• Lines 35-41: Browser fallback cannot provide true async context isolation
• The current implementation warns at runtime but should be documented clearly
• Consider more robust browser detection/handling

💡 SUGGESTION: Add timeout protection for parallel actions → Consider: Implementing per-action timeouts

• Parallel actions could potentially hang indefinitely without timeout protection
• Current implementation relies on individual action timeout handling only

💡 SUGGESTION: Improve AsyncLocalStorage type safety → Consider: Stricter typing for ActionContextStore

• The browser fallback and real AsyncLocalStorage should share stricter type constraints
• Current IAsyncLocalStorage<T> interface could be more type-safe

Positive Findings

✅ Good test coverage - Comprehensive tests for parallel execution and prompt isolation
✅ Proper use of bun test - All tests use bun test framework correctly
✅ No security issues - No hardcoded credentials or injection vulnerabilities
✅ Error isolation - Uses Promise.allSettled correctly for fault tolerance
✅ State management - Proper state snapshot sharing and accumulation between batches

Main Issue

The excessive use of any types throughout the codebase is the primary blocker. This needs to be addressed before merge as it violates TypeScript best practices and the repository's coding standards.

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