[bsbodden]

The value, and the reason it keeps going stale

The docs advertised ModelJars 0.1.75 while Central serves 0.1.76. #350 had just corrected
them from 0.1.65 against a published 0.1.75 — ten releases, and 0.1.65 predates the ONNX intake
and the speech loader, so a reader following the docs got a runtime that could not load models the
catalog advertises. 0.1.76 then shipped an hour after that correction, so the fix left it one
release behind.

verifyDocumentation was never going to catch either case. It keeps the five pages that
interpolate {modeljars-version} consistent with the modeljarsVersion property — and the property
is the thing that is wrong. Nothing resolves it: no module depends on ModelJars, no lockfile pins
it, so no build fails when it drifts.

I flagged exactly this gap in #350 and deferred it as "a separate change". It recurred within the
hour. That settles whether it was worth deferring.

The guard

scripts/verify-modeljars-currency.py takes Maven Central as the authority, for the reason
ModelJars' verify-site-version.mjs states: a source tag does not prove a reader can resolve the
dependency the documentation shows.

• Unreachable Central exits non-zero, rather than waving the check through. A check of this
  shape "first shipped doing nothing" in this repo's history, and that is the mechanism.
• Accepts an explicit released version, so proving it can fail does not need the network — the
  same argument verify-site-version.mjs takes.
• Registered in scripts/integrity/mutation-check.py with the 0.1.65 defect as its mutation,
  because this repo's own rule is that a guard which cannot detect the defect it was written for is
  worse than no guard.

clean tree  -- ok  modeljars-currency/documented-version-behind-central
mutated     -- ok  guard caught: documentation advertising ModelJars 0.1.65 against a published 0.1.76
every one of 9 guards passes clean and fails on its own defect.

Gates

verifyDocumentation, verifyReleaseMetadata, complianceCheck — BUILD SUCCESSFUL.
scripts/integrity/mutation-check.py — 9 of 9.