fix: add llama.cpp build step to all CI workflows

CGO compilation of the nomic package requires llama.cpp headers and
libraries. Without this, CI fails with "fatal error: llama.h: No such
file or directory".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Frank Guo

.github/workflows/ci.yml

@@ -15,5 +15,14 @@ jobs:
         with:
           lfs: true
       - uses: jdx/mise-action@v3
+      - name: Build llama.cpp
+        run: |
+          git clone --depth 1 https://github.com/ggml-org/llama.cpp .deps/llama.cpp
+          cd .deps/llama.cpp
+          cmake -B build \
+            -DLLAMA_BUILD_TESTS=OFF -DLLAMA_BUILD_EXAMPLES=OFF \
+            -DLLAMA_BUILD_SERVER=OFF -DBUILD_SHARED_LIBS=OFF \
+            -DCMAKE_BUILD_TYPE=Release
+          cmake --build build --config Release -j$(nproc) --target llama --target ggml --target common
       - name: Tests
         run: mise run test:ci

.github/workflows/lint.yml

@@ -25,6 +25,16 @@ jobs:
 
       - uses: jdx/mise-action@v3
 
+      - name: Build llama.cpp
+        run: |
+          git clone --depth 1 https://github.com/ggml-org/llama.cpp .deps/llama.cpp
+          cd .deps/llama.cpp
+          cmake -B build \
+            -DLLAMA_BUILD_TESTS=OFF -DLLAMA_BUILD_EXAMPLES=OFF \
+            -DLLAMA_BUILD_SERVER=OFF -DBUILD_SHARED_LIBS=OFF \
+            -DCMAKE_BUILD_TYPE=Release
+          cmake --build build --config Release -j$(nproc) --target llama --target ggml --target common
+
       - name: Run linters
         run: mise run lint
 

.github/workflows/release.yml

@@ -17,6 +17,15 @@ jobs:
         with:
           lfs: true
       - uses: jdx/mise-action@v3
+      - name: Build llama.cpp
+        run: |
+          git clone --depth 1 https://github.com/ggml-org/llama.cpp .deps/llama.cpp
+          cd .deps/llama.cpp
+          cmake -B build \
+            -DLLAMA_BUILD_TESTS=OFF -DLLAMA_BUILD_EXAMPLES=OFF \
+            -DLLAMA_BUILD_SERVER=OFF -DBUILD_SHARED_LIBS=OFF \
+            -DCMAKE_BUILD_TYPE=Release
+          cmake --build build --config Release -j$(nproc) --target llama --target ggml --target common
       - name: Tests
         run: mise run test:ci
       - name: Lint