v0.1.10

Added

• In-admin llms.txt editor on the Settings page. The content is stored in
  the database as a single mdf_llms_txt option ({content, modified},
  autoload off) and therefore survives plugin upgrades. The editor has a Save
  button, a "Reset to default" button that deletes the option, a link to the
  site's /llms.txt, and help text noting that served copies may be cached for
  up to an hour. When a static web-root llms.txt is detected, the editor shows
  the same shadowing warning as the existing admin notice (which is unchanged).
• Input handling rejects invalid UTF-8 and content over 64 KiB with a clear
  admin error (nothing is stored), strips NUL bytes, normalises CRLF to LF, and
  deliberately does not strip tags so markdown autolinks such as
  <https://example.com> survive. Saved values are displayed via
  esc_textarea.

Changed

• /llms.txt now serves the stored mdf_llms_txt content when non-empty, with
  Last-Modified taken from the stored timestamp, and otherwise falls back to
  the bundled llms.txt exactly as before (file mtime). The bundled file is now
  the read-only default template only. GET/HEAD, If-Modified-Since → 304,
  Content-Length, and the 1-hour public cache are preserved; responses now
  also carry X-Content-Type-Options: nosniff.
• Action required for existing installations: before upgrading, copy out any
  customisations you made directly to the bundled
  wp-content/plugins/<plugin-dir>/llms.txt file — this upgrade overwrites that
  file one final time. After upgrading, paste your content into the new
  Settings → llms.txt editor, which stores it in the database so future upgrades
  leave it alone.

Removed

• The README's instruction to customise llms.txt by editing the file inside the
  plugin directory. That is no longer the supported path.