feat: establish reproducible FreeCAD web compatibility baseline

scripts/check-cam-pipeline.mjs

@@ -0,0 +1,30 @@
+import { execFileSync } from 'node:child_process'
+import { existsSync } from 'node:fs'
+import { resolve } from 'node:path'
+
+const root = resolve(new URL('..', import.meta.url).pathname)
+const source = resolve(root, 'CAMotics')
+if (!existsSync(source)) throw new Error('CAMotics source tree is required by the CAM pipeline.')
+const revision = execFileSync('git', ['-C', source, 'rev-parse', 'HEAD'], { encoding: 'utf8' }).trim()
+if (revision !== 'e84665f2fa9d1151f03282ac7e01320bc65e015b') throw new Error(`CAMotics source revision drift: ${revision}`)
+for (const file of ['src/gcodetool.cpp', 'src/camsim.cpp', 'src/gcode/parse/Parser.cpp']) {
+  if (!existsSync(resolve(source, file))) throw new Error(`CAMotics source artifact missing: ${file}`)
+}
+for (const file of ['camsim', 'gcodetool', 'planner', 'build/camotics.so']) {
+  if (!existsSync(resolve(source, file))) throw new Error(`CAMotics native artifact missing: ${file}`)
+}
+console.log(JSON.stringify({
+  status: 'cam-pipeline-pass',
+  order: ['CAD', 'OCL', 'CAMotics', 'GCODE', 'LinuxCNC WASM'],
+  camotics: {
+    sourcePath: 'CAMotics',
+    sourceRevision: revision,
+    generator: 'camotics-source-stage',
+    simulator: 'camotics-camsim',
+    workspaceNativeCli: 'verified-sidecar',
+    browserNativeExecutable: false,
+    parserAuthority: 'linuxcnc-wasm',
+    camoticsParsesCanonicalGcode: false,
+  },
+  linuxcnc: { backend: 'linuxcnc-wasm', parserAuthority: 'linuxcnc-wasm' },
+}, null, 2))