# Todo 53.5: EventPrompt Order-Independent Identity

## Problem

Todo 53.4 distinguishes managed and impostor content, but tests only the ordering where the impostor precedes the managed item. An incorrect collector that keeps the last generated-signature item could still pass.

## Scope

- Change only the EventPrompt payload behavior test.
- Run the same assertions with managed-before-impostor and managed-after-impostor prompt arrays.
- In both orderings, `dual_agent` must retain ordinary custom prompts plus the managed content.
- In both orderings, `chat_agent_tools` must retain ordinary custom prompts only.
- Do not change production code.

## Verification

- Focused payload test passes for both orderings.
- Full WebSocket test file, Node syntax, and diff checks pass.
- Repeat the bounded code-quality review.