# Idea Amendment: Axx-[slug]

**Date**: YYYY-MM-DD  
**Base Idea Version**: vX.Y  
**Triggered by Proposal**: Pxx-[slug]  
**Status**: proposed | accepted | rejected | deferred

---

## 1) Trigger
- What evidence or literature triggers this amendment?
- Pointers (must be verifiable):
  - ...

---

## 2) Proposed Change (diff-style)
> Do not handwave. Specify exact sections/IDs to change.

```diff
- H1: old hypothesis statement
+ H1: new hypothesis statement

- Evaluation protocol: old metric/split
+ Evaluation protocol: new metric/split
```

---

## 3) Rationale (strict)

Why this is necessary (not “nice to have”):

Why it does not invalidate the entire project (or admit if it does):

---

## 4) Impact Analysis

Which existing proposal results remain valid?

What must be re-run?

Which claims (C*) are invalidated?

---

## 5) Decision Needed (user must choose)

Accept: update research/idea.md + bump idea.meta.yaml version

Reject: keep frozen idea; continue with fixes/new proposal

Defer: park; continue limited scope