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The paged backend (backend/cpp/llama-cpp-localai-paged) pins its own verified llama.cpp tip and is excluded from the nightly auto-bumper so a naive bump can never silently break the shipped build. That exclusion also removed the early warning of upstream drift. This restores the signal without touching the pin. Add .github/workflows/llama-cpp-paged-canary.yml (weekly + workflow_dispatch): - apply-check job (ubuntu-latest, toolchain-free): resolve the latest ggml-org/llama.cpp master tip, shallow-checkout it, and apply the full paged series 0001-0030 in order with the build's own git-apply method via the new shared helper .github/scripts/paged-canary-apply.sh. Red on any apply break. - compile job (needs apply-check): on the exact tip it validated, build the paged backend (cublas) inside the same base-grpc-cuda-12 toolchain and the same `make grpc-server` target the shipped build uses, so a red means upstream drift, not toolchain noise. nvcc compiles the kernels with no GPU present. Red here = run a PIN_SYNC (rebase + bit-exact gate + re-export), then bump the paged Makefile pin. The canary is signal-only: it opens no PR and never moves the pin, so the shipped build and the dep-bump PRs stay green regardless. It is fully separate from bump_deps. The lone pre-existing quirk in the series (patch 0019 carries a stray modify hunk against the dev-only doc SSM_DECODE_FIX_RESULTS.md, absent from any clean upstream checkout; git apply is atomic so it rejects the whole patch and cascades to 0021/0022/0026/0028) is handled path-scoped: the helper excludes only that dev-doc and still applies 0019's real code hunks atomically, mirroring prepare.sh's tolerance, so the quirk never false-positives the canary but a genuine code break in 0019 still turns it red. Point the existing pin comments in backend/cpp/llama-cpp-localai-paged/Makefile and .github/workflows/bump_deps.yaml at this canary as the drift signal, and document it in the PIN_SYNC doc: canary red -> do a pin-sync. Assisted-by: Claude:opus-4.8 [Claude Code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io>