[fix] Anthropic CUA triple_click mapping (#2104)#2107
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# Why
`AnthropicCUAClient.convertToolUseToAction()` handled actions like
`click`, `double_click`, and `left_click`, but did not explicitly
support `triple_click`.
Two issues:
1. The action type remained in snake_case (`triple_click`) instead of
being normalized to `tripleClick` — the format expected by
`v3CuaAgentHandler.executeAction()`.
2. Coordinates provided via Anthropic’s coordinate: [x, y] format were
not converted into the separate x / y fields required by the handler.
As a result, Anthropic triple-click actions were silently ignored by the
handler switch.
# What Changed
- AnthropicCUAClient.ts
- Added explicit handling for triple_click / tripleClick in
convertToolUseToAction()
- Mirrors the existing double_click implementation
- Normalizes action type to tripleClick
- Extracts coordinates from both:
- coordinate: [x, y]
- direct x / y fields
- v3CuaAgentHandler.ts
- Added "triple_click" as a switch-case alias in executeAction()
# Test Plan
Added `anthropic-cua-triple-click.test.ts` (Vitest) covering:
- triple_click with coordinate: [x, y]
- triple_click with direct x / y fields
All existing unit tests continue to pass.
<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Fix incorrect handling of Anthropic CUA `triple_click` so triple-click
actions run and coordinates are parsed correctly. Adds unit tests for
both coordinate-array and x/y formats, and a changeset for a patch
release.
- **Bug Fixes**
- Normalize `triple_click`/`tripleClick` to internal `tripleClick` in
`AnthropicCUAClient`, extracting `x`/`y` from `coordinate` or explicit
fields.
- Add `"triple_click"` case to `V3CuaAgentHandler` so both naming styles
execute consistently.
- **Dependencies**
- Add changeset to publish a patch for `@browserbasehq/stagehand`.
<sup>Written for commit 7a54548.
Summary will update on new commits.</sup>
<!-- End of auto-generated description by cubic. -->
---------
Co-authored-by: Claude <noreply@anthropic.com>
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No issues found across 4 files
Confidence score: 5/5
- Automated review surfaced no issues in the provided summaries.
- No files require special attention.
Architecture diagram
sequenceDiagram
participant CUA as Anthropic CUA API
participant Client as AnthropicCUAClient
participant Handler as V3CuaAgentHandler
participant Browser as Browser Action Executor
Note over CUA,Browser: Triple Click Action Mapping Flow
CUA->>Client: tool_use: action="triple_click", input={coordinate=[x,y]}
Client->>Client: convertToolUseToAction()
Note over Client: Check action type
alt action == "triple_click" || action == "tripleClick"
Client->>Client: Extract coordinates from coordinate[] or direct x/y
Client->>Client: Build action: {type:"tripleClick", x, y}
end
Client-->>Handler: executeAction({type:"tripleClick", x, y})
Handler->>Handler: executeAction(action)
alt action.type == "tripleClick" || action.type == "triple_click"
Handler->>Handler: Parse x, y from action
Handler->>Browser: Click(x, y, count=3)
Browser-->>Handler: {success: true}
Handler-->>Client: {success: true}
end
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Why
AnthropicCUAClient.convertToolUseToAction()handled actions likeclick,double_click, andleft_click, but did not explicitly supporttriple_click.Two issues:
triple_click) instead of being normalized totripleClick— the format expected byv3CuaAgentHandler.executeAction().As a result, Anthropic triple-click actions were silently ignored by the handler switch.
What Changed
AnthropicCUAClient.ts
Added explicit handling for triple_click / tripleClick in convertToolUseToAction()
v3CuaAgentHandler.ts
Test Plan
Added
anthropic-cua-triple-click.test.ts(Vitest) covering:All existing unit tests continue to pass.
Summary by cubic
Fixes Anthropic CUA
triple_clickso it runs astripleClickwith x/y parsed fromcoordinate: [x, y]or explicit fields. Also adds a CI job to run evals unit tests.Bug Fixes
triple_click/tripleClicktotripleClickinAnthropicCUAClient.convertToolUseToAction().x/yfromcoordinate: [x, y]or direct fields."triple_click"alias inv3CuaAgentHandler.executeAction().Dependencies
@browserbasehq/stagehand.Written for commit a230bfc. Summary will update on new commits.