# Update Plan

1. Identify the Plan - From the `USER_PROMPT`, locate the target plan `.html` file to modify
2. Scope the Change - THINK HARD about exactly what the prompt asks to change, extend, or revise; keep the edit surgical and touch only the affected sections
3. Apply the Change - Edit the relevant plan sections in place, preserving existing structure, content, and `{{...}}` conventions
4. Update Metadata - Append the current ISO timestamp to `modified` and append the agent name / session id to their lists; never overwrite existing metadata entries
5. Record Amendment - Append a new entry to the Amendments section (newest at the bottom) summarizing what changed and why
6. Report - Summarize the change made and the amendment recorded