每轮只推进合理适量的上下文、禁止顺手扩功能 smoke：补充gantry运动学源清单

结论：第2组 kinematics manifest 补充 LinuxCNC gantry_mm 配置、HAL、tool table、README，以及 gantry HAL component 源/生成源/元数据，并在轻量 manifest 校验中固定这些 source coverage；native/source-link 均复用增量构建，没有触发慢编译。

check-linuxcnc-inputs.sh

@@ -714,6 +714,54 @@ if [[ -n "$manifest" && "$require_complete" == "--require-kinematics-complete" ]
         exit 1
     fi
 
+    required_gantry_asset_sources=(
+        configs/sim/axis/gantry/gantry_mm.ini
+        configs/sim/axis/gantry/gantry_mm.hal
+        configs/sim/axis/gantry/gantry_mm.tbl
+        configs/sim/axis/gantry/README
+    )
+    missing_gantry_asset_sources=()
+    for source in "${required_gantry_asset_sources[@]}"; do
+        if ! printf '%s\n' "${manifest_asset_sources[@]}" | grep -Fx -- "$source" >/dev/null; then
+            missing_gantry_asset_sources+=("$source")
+        fi
+    done
+    if ((${#missing_gantry_asset_sources[@]} > 0)); then
+        echo "manifest does not cover LinuxCNC gantry metric INI/HAL/tool sources as asset sources: $manifest" >&2
+        printf 'missing gantry metric asset source: %s\n' "${missing_gantry_asset_sources[@]}" >&2
+        exit 1
+    fi
+
+    required_gantry_component_source=src/hal/components/gantry.comp
+    if ! printf '%s\n' "${manifest_component_sources[@]}" | grep -Fx -- "$required_gantry_component_source" >/dev/null; then
+        echo "manifest does not cover LinuxCNC gantry HAL component source: $manifest" >&2
+        printf 'missing gantry component source: %s\n' "$required_gantry_component_source" >&2
+        exit 1
+    fi
+
+    required_gantry_generated_source=src/objects/hal/components/gantry.c
+    if ! printf '%s\n' "${manifest_generated_sources[@]}" | grep -Fx -- "$required_gantry_generated_source" >/dev/null; then
+        echo "manifest does not cover LinuxCNC generated gantry HAL component source: $manifest" >&2
+        printf 'missing generated gantry component source: %s\n' "$required_gantry_generated_source" >&2
+        exit 1
+    fi
+
+    required_gantry_metadata_sources=(
+        src/objects/hal/components/gantry.mak
+        src/objects/man/man9/gantry.9.adoc
+    )
+    missing_gantry_metadata_sources=()
+    for source in "${required_gantry_metadata_sources[@]}"; do
+        if ! printf '%s\n' "${manifest_metadata_sources[@]}" | grep -Fx -- "$source" >/dev/null; then
+            missing_gantry_metadata_sources+=("$source")
+        fi
+    done
+    if ((${#missing_gantry_metadata_sources[@]} > 0)); then
+        echo "manifest does not cover LinuxCNC gantry HAL component metadata sources: $manifest" >&2
+        printf 'missing gantry metadata source: %s\n' "${missing_gantry_metadata_sources[@]}" >&2
+        exit 1
+    fi
+
     resolve_vismach_loadusr_source() {
         local command_name=$1
         case "$command_name" in