af_fulltext: rule-driven extraction with a pluggable renderer

Replaces subscribing feeds through a self-hosted Full-Text RSS proxy. Feed URLs
go back to being real feed URLs and extraction happens inside tt-rss, using the
same ftr-site-config rules the proxy used.

The engine in lib/ has no tt-rss dependencies, so rules can be developed and
audited from the command line; init.php is a thin adapter over it.

Two findings from measuring the real subscription first, both of which shaped
the design:

- Firecrawl's own onlyMainContent is far too coarse to extract with (73KB of
  chrome on a Cloudflare post), but it is an excellent renderer. So it is used
  for rawHtml only and the rule engine does the extraction.
- A body rule that stops matching after a redesign falls through to Readability
  and still produces a plausible article, so the breakage is invisible. Every
  extraction now records which rule matched and whether it fell back; auditing
  the 34 live feeds surfaced five community rules that match nothing.

Custom rules included for the sites that needed them, including three comics
where the article is an image and text-scoring extractors return the wrong thing
or nothing at all.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011sSJdftQx5bW5HZHgUKF3i
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Michal
2026-08-25 00:16:16 +01:00
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## HTML5-PHP License
Copyright (c) 2013 The Authors of HTML5-PHP
Matt Butcher - mattbutcher@google.com
Matt Farina - matt@mattfarina.com
Asmir Mustafic - goetas@gmail.com
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
## HTML5Lib License
Portions of this are based on html5lib's PHP version, which was a
sub-project of html5lib. The following is the list of contributors from
html5lib:
html5lib:
Copyright (c) 2006-2009 The Authors
Contributors:
James Graham - jg307@cam.ac.uk
Anne van Kesteren - annevankesteren@gmail.com
Lachlan Hunt - lachlan.hunt@lachy.id.au
Matt McDonald - kanashii@kanashii.ca
Sam Ruby - rubys@intertwingly.net
Ian Hickson (Google) - ian@hixie.ch
Thomas Broyer - t.broyer@ltgt.net
Jacques Distler - distler@golem.ph.utexas.edu
Henri Sivonen - hsivonen@iki.fi
Adam Barth - abarth@webkit.org
Eric Seidel - eric@webkit.org
The Mozilla Foundation (contributions from Henri Sivonen since 2008)
David Flanagan (Mozilla) - dflanagan@mozilla.com
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.