Reported from the library: a four-colour AMS bookmark showed as "printable now"
against a single spool of Jade White. The matching collapsed the project's four
slots into the set of materials it used — {PLA} — and then asked only whether a
PLA spool existed. A sixteen-colour model would have passed the same way.
Ignoring colour is right: printing a bookmark in red instead of white still
prints. Ignoring slot count is not: four slots need four spools loaded. Matching
now counts slots per material and reports the shortfall — "needs 3 more PLA",
and on the model page "Needs 4 × PLA. You have 1 of 4 PLA."
The tests carried the same mistake, asserting that one spool satisfied a
multi-slot project, so they are rewritten around the reported case.
Also documents the feature in the README, which had no entry for it at all.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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