v0.1.12

Fixed

• False machine-readable claim when markdown offering is off (Defect A).
  The bundled /llms.txt now serves its "Machine-readable content" section
  only when both markdown offering is enabled and negotiation is
  confirmed (self-test working, or the owner override below). Previously the
  claim was suppressed only on blocked, so a site with "Offer markdown to
  agents" switched off still told agents it serves markdown on request, despite
  serving none at all.
• Weak self-test URL selection (Defect B). mdf_negotiation_test_url() is
  replaced by candidate selection that skips non-public post types, password
  protected and non-publish posts, and zero-byte or missing cached .md
  files; prefers the front page and then the most recently modified qualifying
  item; verifies each chosen URL is publicly reachable (HTTP 200) before
  drawing any conclusion; and probes up to three distinct URLs. A chosen URL
  that 404s now yields unknown with an explanatory detail instead of a
  misleading result. A mix of markdown and HTML across probes is reported
  blocked naming the split; working is reported only when every probe that
  returned 200 returned markdown. The retry, re-entry guard, 5-second timeout,
  redirection 0, and self-test UA remain.

Added

• Owner confirmation override. When offering is on and the self-test is
  unknown (common on hosts that block loopback requests), the Settings page
  offers a checkbox to confirm negotiation manually, next to the exact curl
  command and the expected response (content-type: text/markdown,
  Vary: Accept). Stored in its own mdf_negotiation_owner_confirmed option
  (autoload off); never enabled by default or set programmatically; cleared
  automatically when offering is switched off or when a later self-test reports
  blocked (evidence beats the earlier assertion). Nonce and
  manage_options as with every other state change.
• The Settings page now always shows the negotiation state and whether the
  machine-readable claim is published or withheld, with the reason
  legible in one line: offering off, unconfirmed (loopback failed), confirmed
  by self-test, confirmed by owner, or blocked with the cache named. A note
  reminds owners with custom llms.txt content that their saved text is
  published verbatim.

Changed

• mdf_get_servable_llms_txt() gates the bundled claim on
  mdf_negotiation_claim_confirmed() (offering on and confirmed) rather
  than only on blocked. Owner-supplied mdf_llms_txt content is still served
  verbatim in every state.