build_release_plan.py refuses to emit anything without the canonical www gig
page, with the right message: "Gig metadata is never invented here — create it
there first." Every upload adapter reads that plan, so one missing file blocks
SoundCloud, YouTube and Bandcamp at once. CosmicFest 2026 has no page, which
makes that gate the single thing standing between a finished master and PLN
hearing it on the platform he asked to hear it on.

The gate is correct and this does not weaken it. It splits the file along the
line the gate cares about instead of blurring it:

  derivable   name, file, bpm, start/end/duration, style, samples
  PLN only    the gig's title, venue, stage, description, and each track's
              `section` (the movements of the set)

Everything in the second group is emitted as null with a `_needs_pln` list, never
as a plausible guess. The output is a DRAFT at whatever path you pass; promoting
it into the www repo stays PLN's call. So tomorrow is four fields and a review
rather than an afternoon of reconstruction.

Derivations reuse what already parses the corpus rather than re-reading it:
`style` comes from the score's own directory, which is how OPAL's published
styles line up with the tree, and `samples` comes from catalog_view.json's
`score_sounds`. A score absent from that view is REPORTED, not handed an empty
list — an empty sample list is invisible once it is on the shelf, which is the
whole lesson of feedback_parsers_over_copy. Seven of CosmicFest's fourteen are
currently absent because the view is stale; re-running build_catalog_view fills
them.

The derived timecodes then validated themselves against PLN's own ear notes,
which is the reassuring part. Piment Bresilien lands at 0:35:46 against his
playhead comment "starting at 35:45.6 i hear proper only piment start sound",
and LiveCode Parade at 0:54:58 against the 54:59 note where crossmatch had
guessed gimme_acid and the declared 130 BPM broke the tie. 14 tracks, 63.0 min,
30 sample packs, 89-170 BPM.