diff --git a/docs/customization.md b/docs/customization.md
index 3c20a1d65..c9a3d896d 100644
--- a/docs/customization.md
+++ b/docs/customization.md
@@ -346,6 +346,7 @@ Community schemas are not vendored into OpenSpec core — they live in their own
 | Schema | Maintainer | Repository | Description |
 |--------|-----------|-----------|-------------|
 | `superpowers-bridge` | @JiangWay | [JiangWay/openspec-schemas](https://github.com/JiangWay/openspec-schemas/tree/main/superpowers-bridge) | Integrates OpenSpec's artifact governance with [obra/superpowers](https://github.com/obra/superpowers) execution skills (brainstorming, writing-plans, TDD via subagents, code review, finishing). Adds an evidence-first `retrospective` artifact filling a gap Superpowers does not natively cover. |
+| `e2e-runbooks` | @Lukk17 | [Lukk17/openspec-schemas](https://github.com/Lukk17/openspec-schemas/tree/master/openspec/schemas/e2e-runbooks) | Capability-level end-to-end test runbooks. Each capability gets an immutable spec, an immutable tasks-template, and one timestamped run record per execution. Assertions are observable behaviour only (HTTP status, response body, persisted state — never log substrings); each run records start/end UTC, duration, and best-estimate LLM token consumption. |
 
 > Want to contribute a community schema? Open an issue with a link to your repository, or submit a PR adding a row to this table.