Publish the advertising the words measured, and only that

Subtraction has earned it. Eighteen episodes, 92% to 104% of what the
declared-versus-served length gap implies, every pod found, edges pulled back
off the programme, and the one class of mistake that mattered -- a break opening
on the host's own sentence -- traced and fixed.

**Only subtraction is published.** Reading the ad copy measured 0%, 0%, 15% and
29% on the same kind of episode, and on a show that bakes its reads in it found
2:13 where the lengths can see nothing at all. That stays a hint beside the
words, dimmed on the transcript screen, and never becomes a seek.

**The length gap is the guard as well as the measure.** It comes from the feed
and the file rather than from any detector, so it is the one number able to
contradict one. Nothing is published for an episode with no gap -- there would
be nothing to check it against -- and a candidate set claiming half again as
much as was inserted is refused with its reason, because it has found something
other than advertising.

They land in their own field rather than beside the audio scan's, which rewrites
its list from scratch on every detection pass and would wipe them. The API
serves the union, merging ranges that overlap or touch: playback seeks to a
break's end, so two overlapping breaks would seek out of the first and straight
into the second, and two touching ones would resume for no time at all before
skipping again. Advertising wins where merged ranges disagree about what they
are -- the phone skips advertising unconditionally and a show's own audio only
by preference, and being wrong the other way means sitting through an
advertisement the server had already found.

Nothing about playback changes. They arrive in the field the phone has read
since the on-device detector existed.

**Refetching is now gated on age**, which is Peter's steer and what the numbers
say. A second fetch made minutes after the first came back twenty seconds
different and found 21% of the advertising; another came back the same length to
the second and found none. Insertion varies the amount per request, not the
campaign. So it is for shows whose episodes are still worth hearing four weeks
later -- a slow-drip archive, a leisure show -- and not for daily news, which is
pruned long before a campaign rotates.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018AwnALZL6bD4VBtATDVv3B

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