"SOLVED" was a note to a reader of the previous page

[dhobi]

Asked what the — SOLVED tag in mov.md meant — whether it documented a bugfix process. It documents neither a process nor a property of the format. It means this page used to say something else.

Where it came from

A sound can name the frame that follows it — SOLVED got the tag in 29d75db, whose own commit message says why:

docs/formats/mov.md had described the field and concluded "no shipped movie uses the jump field", which is what made this a shipped bug: measured, 30 records across the six editions use it, all of them this one film.

That bug is #2 — the pocket watch playing 6.97 s of a 27.1 s monologue and then parking on the frame for ever.

A movie carries its own pacing — SOLVED, out of the demo build's engine predates the squashed initial import, but its body has the same shape: "The port derived a frame rate from the soundtrack for years. It did not have to."

So the tag is addressed to somebody who read the previous version of the page. There are exactly two in the whole doc set and no OPEN / UNSOLVED / UNKNOWN counterpart anywhere, which leaves a reader today asking which of the other twenty sections are unsolved. The answer is none of them — there was never an axis.

What changed

Tags dropped; the history kept where it belongs.

The pacing section already opened with its own history, so it only needed the recovery folded into the prose. The sound section was missing the better half of the story, and now has it — the page did not merely fail to know, it published the opposite:

This page is why. It described the field and then concluded that no shipped movie used it, so the port dropped it — and a documented wrong answer is worse than a documented gap, because nothing goes looking for it. Measured, 30 records across the six editions use the field, all of them this one film.

This also shortens an anchor that has broken twice already: six links pointed at #a-movie-carries-its-own-pacing-—-solved-out-of-the-demo-build-s-engine, an em dash and an apostrophe inside a slug. All six updated to #a-movie-carries-its-own-pacing.

What it deliberately does not do

Strip the voice. ## The behaviour rules that took a while to pin down is a sibling heading and stays — that is prose about the subject. — SOLVED was a tag about the document.

Docs only. Build clean, every anchor and link resolving.

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