fix(executor): surface pre-execution errors

[Sg312]

Summary

Surface pre-execution errors

Type of Change

• Bug fix

Testing

Manual

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
docs	Skipped			Nov 12, 2025 9:02am

[greptile-apps]

Greptile Overview

Greptile Summary

This PR adds console logging for pre-execution validation errors that occur before the workflow actually starts executing. Previously, when workflow validation failed (e.g., missing trigger blocks, invalid configuration), these errors would be sent via the execution:error SSE event but would not appear in the user's terminal console.

Changes:

• Added an addConsole() call within the onExecutionError callback in use-workflow-execution.ts:1008-1022
• The console entry uses blockId: 'workflow' and blockType: 'workflow' to indicate this is a workflow-level error rather than a specific block error
• Surfaces errors that happen during validation or initialization, before any blocks execute

Impact:

• Improves user visibility of pre-execution errors
• Consistent error handling - both block-level and workflow-level errors now appear in the console
• Helps users understand why their workflow failed to start

Confidence Score: 5/5

• This PR is safe to merge with no risk
• The change is minimal and straightforward - it simply adds a console log entry when pre-execution errors occur. The implementation follows the exact same pattern as the existing onBlockError callback (lines 931-949), uses the correct types from ConsoleEntry interface, and properly passes all required fields. No logic changes, no breaking changes, and improves user experience by surfacing errors that were previously invisible in the console.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts	5/5	Added console logging for pre-execution errors in the onExecutionError callback to surface workflow validation errors to users

Sequence Diagram

sequenceDiagram
participant Client as Client/UI
participant Hook as useWorkflowExecution
participant Stream as useExecutionStream
participant API as /api/workflows/[id]/execute
participant Core as executeWorkflowCore
participant Console as TerminalConsole
Client->>Hook: handleRunWorkflow()
Hook->>Stream: execute(options)
Stream->>API: POST with SSE enabled
alt Pre-execution validation error
API->>Core: executeWorkflowCore()
Core-->>API: throws validation error
API->>API: catch error in SSE stream
API->>Stream: execution:error event
Stream->>Hook: onExecutionError(data)
Note over Hook: NEW: addConsole() called
Hook->>Console: addConsole({error, blockId: 'workflow'})
Console-->>Client: Display error in console
else Normal execution
API->>Core: executeWorkflowCore()
Core->>API: block events
API->>Stream: execution:completed event
Stream->>Hook: onExecutionCompleted(data)
end

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[greptile-apps]

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