improvement(execution): trigger manual execution using mock payloads

[icecrasher321]

Summary

Can trigger all triggers manually. Will run with a mock payload for integration triggers.

Type of Change

• Other: UX Improvement

Testing

Tested manually

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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Project	Deployment	Preview	Comments	Updated (UTC)
docs	Ready	Preview	Comment	Nov 9, 2025 4:26am

[greptile-apps]

Greptile Overview

Greptile Summary

This PR enables manual execution of all trigger types (including external webhooks and integrations) by generating mock payloads from trigger output definitions.

Key Changes:

• Added mock payload generation system that dynamically creates test data from trigger outputs schema using generateMockPayloadFromOutputsDefinition()
• Implemented multi-trigger support with path-based grouping via selectBestTrigger() to handle workflows with multiple disjoint execution paths
• Added EXTERNAL_TRIGGER to manual execution priorities, allowing webhooks/integrations to run manually
• Removed hardcoded sample payloads from 60+ trigger files - now auto-generated from outputs at runtime via getTrigger()
• Removed filterEdgesFromTriggerBlocks() utility as trigger-to-trigger edge prevention now happens at creation time

Architecture:
The system determines if a trigger needs mock data using triggerNeedsMockPayload() (true for webhooks/integrations, false for schedules/manual triggers). For external triggers, it extracts the trigger ID from block metadata and generates structured mock data matching the trigger's output schema. The mock payload generator recursively processes nested output structures to create realistic test data.

Impact:
Significantly improves developer experience by allowing testing of webhook-triggered workflows without external events. Mock payloads maintain type consistency with actual webhook data since they're generated from the same output definitions.

Confidence Score: 4/5

• This PR is mostly safe to merge with one logical issue requiring attention
• The implementation is well-structured with comprehensive mock payload generation and multi-trigger support. However, there's a critical issue in processOutputField at apps/sim/lib/workflows/trigger-utils.ts:50 that could cause infinite recursion if trigger outputs contain circular references. While unlikely in practice (since outputs are typically defined as plain objects), this should be fixed before merge.
• apps/sim/lib/workflows/trigger-utils.ts requires fixing the circular reference protection in processOutputField

Important Files Changed

File Analysis

Filename	Score	Overview
apps/sim/lib/workflows/trigger-utils.ts	4/5	Added comprehensive mock payload generation logic from trigger outputs, plus trigger selection and grouping by execution paths
apps/sim/lib/workflows/triggers.ts	5/5	Added EXTERNAL_TRIGGER to manual execution priorities and improved block classification with registry fallback
apps/sim/lib/workflows/executor/execution-core.ts	5/5	Removed edge filtering logic since trigger-to-trigger edges are prevented at creation time
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts	4/5	Implemented multi-trigger support with path-based grouping, mock payload generation for external triggers, and improved error handling
apps/sim/triggers/index.ts	4/5	Auto-generates and injects samplePayload subblocks dynamically from trigger outputs definition

Sequence Diagram

sequenceDiagram
participant User
participant UI as Workflow UI
participant Hook as useWorkflowExecution
participant Utils as TriggerUtils
participant API as /api/workflows/[id]/execute
participant Core as ExecutionCore
participant Executor
User->>UI: Click "Run Workflow" button
UI->>Hook: executeWorkflow()
Note over Hook: Resolve start candidates
Hook->>Utils: resolveStartCandidates(blocks, 'manual')
Utils-->>Hook: Array of trigger candidates
Note over Hook: Select best trigger per path
Hook->>Utils: selectBestTrigger(candidates, edges)
Utils->>Utils: groupTriggersByPath()
Utils->>Utils: selectBestFromGroup()
Utils-->>Hook: Selected trigger(s)
alt External Trigger (webhook/integration)
Hook->>Utils: triggerNeedsMockPayload(trigger)
Utils-->>Hook: true
Hook->>Utils: extractTriggerMockPayload(trigger)
Utils->>Utils: getTrigger(triggerId)
Utils->>Utils: generateMockPayloadFromOutputsDefinition()
Utils-->>Hook: Mock payload data
else Manual/API/Input Trigger
Hook->>Hook: Use test values from inputFormat
end
Hook->>API: POST with input & startBlockId
API->>Core: executeWorkflowCore()
alt No startBlockId provided
Core->>Utils: findStartBlock(blocks, executionKind)
Utils-->>Core: Resolved trigger block
end
Core->>Executor: execute(workflow, input)
Executor-->>Core: Execution result
Core-->>API: Result
API-->>Hook: Response
Hook-->>UI: Update execution state
UI-->>User: Show execution results

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