v0.22.0

The Lit DevTools now run in any server. createLitDevtools() serves the
panel from your app's own origin, without Vite or a second port, and docks it
in a drawer along the bottom of the page. An Elysia example puts it next to
server rendering on Bun, and a forms example shows form-associated elements
with :state(). The panel takes its colours, type and code font from the Lit
Design System, and agents can read the docs as Markdown. Nothing needs action
to upgrade.

Added

• The Lit DevTools in any server. createLitDevtools() from
  @oddsquad/vite-plugin-lit/devframe gives a server without Vite (Elysia,
  Hono, Bun.serve, a SvelteKit or Next.js route) one request handler for the
  panel, its page script and its RPC on the app's own origin, with no
  lit-devtools dev process or second port.
• The panel docks in the page. With createLitDevtools(), a Lit button in
  the corner opens the panel in a resizable drawer along the bottom of the
  page, and picking an element opens it there instead of in another tab. It
  reopens as you left it; pass dock: false to keep it a tab.
• An Elysia example, without Vite. A guestbook that Elysia renders on Bun
  with @lit-labs/ssr, streams, hydrates and keeps live over a WebSocket,
  with a form that works before it hydrates. It shows the hydration traps to
  avoid, attaches the standalone Lit DevTools, and builds into a single
  executable.
• A forms example. A text field, a switch and a star rating extend one
  FormControl base class and work in a plain <form>: they submit with
  FormData, block submit while invalid, reset, and follow a disabled
  fieldset. Each shows what it is doing as :state() custom states for CSS to
  style on.
• Every docs page has a Markdown copy. Append index.md to a page's
  address, follow its rel="alternate" link, or send Accept: text/markdown
  to get the page as Markdown, with Link headers pointing to llms.txt and the
  sitemap.
• An agent skill for the plugin. Agents that read Agent Skills Discovery
  find it at /.well-known/agent-skills/ on the docs site: setup, CSS
  delivery, hot-patch failures and the DevTools MCP server in one file.
• A setup prompt for coding agents. The Installation page has a prompt to
  copy into your agent; it installs the plugin, adds it to the Vite config and
  registers the types, then lists what it changed.
• Browser agents can search and read the docs through WebMCP. In a
  browser with WebMCP, the docs offer search_docs, read_docs_page and
  open_docs_page tools.

Changed

• The panel takes the Lit Design System's theme. Its colours, focus ring,
  motion and type scale come from the same tokens as the docs, in both colour
  schemes. Corners stay square; pills, status dots and the Timeline's layer
  chips are round.
• The panel sets code in Lilex. Values, source locations, timings and the
  Timeline's lanes use the Lilex monospace instead of the system one.
• The Updates count no longer looks like an error. The number on the
  Updates tab is blue instead of red; the orange count on Components still
  flags Lit warnings.
• A lighter split between the tree and the details. The divider in the
  Components view is a hairline that lights up blue under the pointer, and is
  just as easy to drag.
• The docs moved to vite-plugin-lit.oddsquad.dev. Links in the DevTools
  panel, the README and the extension listing point there, and the old
  oddcelot.github.io/vite-plugin-lit/ addresses redirect.

Fixed

• A re-created child keeps its own listeners and lookups. When a parent
  edit makes Lit re-create a child, #private arrow-function listeners and
  fields the child sets in connectedCallback, such as a form it looks up,
  stay the new element's instead of being overwritten by the old one's.
• Dark outlines and nulls are legible. In the dark scheme, unchecked
  switches, inputs and outlined buttons have a visible outline, and null
  values in the Properties view no longer fade into the background.
• The ./build and ./astro/* exports have types on JSR. JSR no longer
  warns that these entry points have no type declarations, and installing the
  package from JSR types them like the others.