## Summary

- Drop the stale "hx-history-elt removed" claim from the Removed
Attributes table — beta3 restored the attribute alongside an improved
`hx-history-cache` extension.
- Add `htmx:response:error` to the event-rename table; this convenience
event was reintroduced in beta3 to mirror htmx 2's `htmx:responseError`.
- Add the new `hx-nonce` and `hx-live` extensions to the New Extensions
table.
- Document `htmx.config.prefix` default change to `"data-hx-"`.
- Add a "Beta1 to Beta3 Changes" section that mirrors the existing
alpha→beta1 section, covering:
  - The new `outerSync` swap style
  - `hx-download` auto-detection via `Content-Disposition`
  - `hx-preload` boost knobs (`boostEvent`, `boostTimeout`, `autoBoost`)
- `hx-config` no longer accepting request `mode` overrides (security
fix)
- The constructable indicator stylesheet that lets CSP-strict
deployments drop `'unsafe-inline'` from `style-src`
  - Pantry element switched from inline `style` to `hidden`
- `htmx.takeClass` / `htmx.forEvent` moved into the `hx-live` extension

These docs land ahead of #1770 (the renovate bump from beta2 → beta3) so
users hitting the beta3 changelog have a vibetuner-flavored map of
what's new.

## Test plan

- [x] `just lint-md` shows no new failures in `htmx-migration.md`
- [x] All edited lines stay under 120 chars
- [ ] Spot-check the rendered docs site on the staging build

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

🤖 I have created a release *beep* *boop*
---


##
[10.11.0](v10.10.0...v10.11.0)
(2026-05-11)


### Features

* **htmx:** prepare framework templates for hx-nonce extension
([#1773](#1773))
([16137e8](16137e8))
* **security:** add CSP_STYLE_SRC_STRICT to drop 'unsafe-inline' from
style-src ([#1774](#1774))
([3f74886](3f74886))


### Bug Fixes

* **deps:** update dependency htmx.org to v4.0.0-beta3
([#1770](#1770))
([d21d883](d21d883))


### Documentation Updates

* gate htmx-nonce + strict style-src behind a min-version note
([#1779](#1779))
([bc6d365](bc6d365))
* **htmx:** document beta3 features and correct migration guide
([#1771](#1771))
([2921dbc](2921dbc))
* put htmx Nonce Protection before Strict style-src
([#1775](#1775))
([d1254c9](d1254c9))
* sync llms.txt, llms-full.txt, and frontend rules with htmx beta3
([#1776](#1776))
([b486470](b486470))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>