fix(serializer): validate required fields for blocks without tools

[waleedlatif1]

Summary

• Fixed serializer skipping required field validation for blocks with empty tools.access (e.g., wait block)
• Added validation loop for subBlock required fields not covered by tool params
• Minor fix for duration formatting to show "0ms" instead of "0.00ms"

Type of Change

• Bug fix

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)

^{Cursor Bugbot found 1 potential issue for commit 60fcaf5}

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Feb 4, 2026 11:47pm

[greptile-apps]

Greptile Overview

Greptile Summary

Fixed serializer validation bug where required fields were not validated for blocks with empty tools.access arrays (like wait blocks).

The previous implementation early-returned when tools.access was empty, skipping validation entirely. The fix restructures the validation logic:

• First validates tool parameters for blocks that have tools
• Then validates required subBlock fields not already covered by tool params
• Uses a Set to track which fields were already validated to avoid duplication

Also includes a minor formatting improvement to show "0ms" instead of "0.00ms" for zero/near-zero durations.

Key changes:

• Moved tool existence check inside validation section rather than early return
• Added secondary validation loop for subBlocks with required: true not covered by tool params
• Added comprehensive test coverage for wait block validation scenarios
• Tests cover: missing required fields, valid fields, multiple missing fields, and disabled block handling

Confidence Score: 4/5

• This PR is safe to merge with minimal risk
• The changes fix a clear bug in validation logic with comprehensive test coverage. The refactoring is well-structured and maintains backward compatibility for blocks with tools. Minor deduction for lack of integration testing across different block types with varying tool configurations.
• No files require special attention

Important Files Changed

Filename	Overview
apps/sim/serializer/index.ts	Refactored validation logic to handle blocks without tools by adding secondary validation loop for required subBlock fields not covered by tool params
apps/sim/serializer/index.test.ts	Added comprehensive test coverage for wait block validation with empty tools.access array

Sequence Diagram

sequenceDiagram
participant Client
participant Serializer
participant ValidationLogic
participant BlockConfig
participant ToolRegistry
Client->>Serializer: serializeWorkflow(blocks, validateRequired=true)
Serializer->>Serializer: serializeBlock(block)
Serializer->>Serializer: extractParams(block)
alt validateRequired is true
Serializer->>ValidationLogic: validateRequiredFieldsBeforeExecution(block, blockConfig, params)
ValidationLogic->>BlockConfig: Check if block enabled
alt Block has tools.access
ValidationLogic->>ToolRegistry: getTool(currentToolId)
ToolRegistry-->>ValidationLogic: currentTool
loop For each tool param
ValidationLogic->>ValidationLogic: Check if required & user-only
ValidationLogic->>ValidationLogic: Check visibility via shouldSerializeSubBlock
ValidationLogic->>ValidationLogic: Validate field value
end
end
Note over ValidationLogic: NEW: Secondary validation for blocks without tools
ValidationLogic->>ValidationLogic: Build validatedByTool Set
loop For each subBlock in blockConfig
alt Not validated by tool params
ValidationLogic->>ValidationLogic: Check visibility via shouldSerializeSubBlock
ValidationLogic->>ValidationLogic: Check if required
ValidationLogic->>ValidationLogic: Validate field value
end
end
alt Missing fields found
ValidationLogic-->>Serializer: throw Error(missing fields)
Serializer-->>Client: Error
else All fields valid
ValidationLogic-->>Serializer: validation passed
end
end
Serializer->>Serializer: Continue serialization
Serializer-->>Client: SerializedBlock

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