added prompt 4 for the implementation

> Great! Regarding 'Testing', you are executing on a development machine which has only archiver access. Where testing is needed, please prompt me to perform the needed operations on the instrument, while you observe the response through the archiver. I like your plan to validate by using the archiver data script we developed. Please update the plan to document this. Should we start a new context to execute the plan?

Claude updated the plan per those instructions and suggested a prompt to implement:

## Prompt 4

You are working in the tasking project, bl4b-alignment-integration branch. Execute the plan at tasking/plan/refactor-chi-scan-with-flying-callback-technique.md. Create a new branch on the bl4b-scripts submodule off of ScriptScan/2026A, synthesize bl4b-scripts/flying_chi.py per §4–§5 of the plan, and commit. Testing will follow the prompt-and-observe protocol in §6 — do not attempt to run the script yourself.