---
id: EP-DOMAIN-NNN
type: ep
ep_id: EP-DOMAIN-NNN
target_org: <github-org-or-owner>
target_repo: <repository-name>
title: "Short description of the extension point"
status: draft
domain: custodian   # change to your domain
related_workstream: null
state_hub_contribution_id: null
created: "YYYY-MM-DD"
updated: "YYYY-MM-DD"
location: "src/file.ts:42"
upstream_issue_url: null
---

# Extension Point Proposal: EP-DOMAIN-NNN

## Summary

_One-paragraph description of the extension point: where in the upstream codebase
it would live, what it would enable, and who would benefit._

## Location

**File**: `<path/in/upstream/repo>`
**Line**: _approximate location where the hook/callback would be inserted_

## Proposed Interface

```typescript
// or Python, Rust, etc. — match the upstream project's language
interface ExtensionPoint {
  // …
}
```

## Rationale

_Why this extension point is valuable. What use cases does it unlock?
Why should upstream accept it rather than keeping it local?_

## Implementation Sketch

_Brief notes on how upstream might implement this, if relevant._

## Notes

_References to related upstream issues, PRs, or discussions._