Restore the context.Context parameter on app.New (the rebase auto-merge
silently dropped it while keeping the ctx-using body) and thread the
caller's context through all call sites, including tests.
Annotate the build-time root context in the new
pkg/modelsdev/internal/gen snapshot generator (landed from main) for the
ContextConnectivity cop: it is a standalone main with no parent context.
Adds a build-time snapshot of the models.dev catalog baked into the
binary via go:embed, used as last-resort fallback when the cache and
live fetch are both unavailable. A generator (pkg/modelsdev/internal/gen)
refreshes the snapshot; task update-models and a weekly GitHub Actions
workflow keep it current.
The fallback snapshot is not memoized on transient fetch failure, so the
Store retries the fetch once the network recovers. Context windows for
Fable and Opus 4.6-4.8 now come from the embedded snapshot (always
available, even offline); the Anthropic client falls back to the flat
200k floor only when no catalogue entry exists. A warning is logged when
the embedded snapshot fails to parse so a bad build artifact is
discoverable.
The snapshot freshness check is opt-in: TestSnapshotDateParses always
runs (time-independent) while TestSnapshotDateIsFresh is skipped unless
CHECK_MODELS_SNAPSHOT_FRESHNESS is set. A 'task check-models-fresh'
target provides the CI backstop.
Assisted-By: Claude
David Gageot