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结论：补齐机器会话显式参数文件和刀具表文件名优先于 INI 派生值的 Node 与 Chromium 验证，保持该策略在 OPFS/SDK 主机边界内，并通过 host/WASM/browser 聚合验证。

wasm-port/tests/browser/interp_smoke.html

@@ -412,6 +412,82 @@
         ].join("\n"),
       );
 
+      await saveMachineTextFiles("browser-ini-override-session", {
+        ini: [
+          "[EMC]",
+          "MACHINE = browser-ini-override-session",
+          "",
+          "[RS274NGC]",
+          "PARAMETER_FILE = browser-ignored.var",
+          "",
+          "[EMCIO]",
+          "TOOL_TABLE = browser-ignored-tool.tbl",
+          "",
+        ].join("\n"),
+      });
+      await saveTextFile(
+        "linuxcnc/machines/browser-ini-override-session/browser-explicit.var",
+        [
+          "5161 41.25",
+          "5162 82.5",
+          "5220 1",
+          "5221 6.5",
+          "5399 101",
+          "",
+        ].join("\n"),
+      );
+      await saveTextFile(
+        "linuxcnc/machines/browser-ini-override-session/browser-explicit-tool.tbl",
+        "T9 P9 Z5.5 D0.625 ;browser explicit tool\n",
+      );
+      const loadedIniOverrideSession = await loadMachineSessionFromOpfs(
+        interp,
+        "browser-ini-override-session",
+        {
+          iniSdk: ini,
+          iniWasmPath: "/work/browser-ini-override-session.ini",
+          parameterFilename: "browser-explicit.var",
+          parameterWasmPath: "/work/browser-explicit.var",
+          toolTableFilename: "browser-explicit-tool.tbl",
+          toolTableWasmPath: "/work/browser-explicit-tool.tbl",
+        },
+      );
+      if (
+        loadedIniOverrideSession.parameters.opfsPath !==
+        "linuxcnc/machines/browser-ini-override-session/browser-explicit.var"
+      ) {
+        throw new Error(`unexpected explicit parameter path: ${loadedIniOverrideSession.parameters.opfsPath}`);
+      }
+      if (
+        loadedIniOverrideSession.toolTable.opfsPath !==
+        "linuxcnc/machines/browser-ini-override-session/browser-explicit-tool.tbl"
+      ) {
+        throw new Error(`unexpected explicit tool path: ${loadedIniOverrideSession.toolTable.opfsPath}`);
+      }
+      verifyExpectedOutput(
+        "opfs_load_explicit_parameter_file",
+        loadedIniOverrideSession.parameters.result,
+        [
+          "restore_parameters=0",
+          "parameter_5161=41.25",
+          "parameter_5162=82.5",
+          "parameter_5221=6.5",
+          "parameter_5399=101",
+        ].join("\n"),
+      );
+      verifyExpectedOutput(
+        "opfs_load_explicit_tool_table",
+        loadedIniOverrideSession.toolTable.result,
+        [
+          "tooldata_load=0",
+          "tool_1.toolno=9",
+          "tool_1.pocketno=9",
+          "tool_1.z=5.5",
+          "tool_1.diameter=0.625",
+          "tool_1.comment=browser explicit tool",
+        ].join("\n"),
+      );
+
       await saveMachineTextFiles("browser-invalid-param-file-session", {
         ini: [
           "[EMC]",

wasm-port/tests/opfs/node/verify_file_service.mjs

@@ -209,6 +209,13 @@ const bridgeIniSdk = {
     ) {
       return "custom.var";
     }
+    if (
+      path === "/work/ini-override-session.ini" &&
+      section === "RS274NGC" &&
+      tag === "PARAMETER_FILE"
+    ) {
+      return "ignored.var";
+    }
     if (
       path === "/work/invalid-ini-file-session.ini" &&
       section === "RS274NGC" &&
@@ -223,6 +230,13 @@ const bridgeIniSdk = {
     ) {
       return "custom-tool.tbl";
     }
+    if (
+      path === "/work/ini-override-session.ini" &&
+      section === "EMCIO" &&
+      tag === "TOOL_TABLE"
+    ) {
+      return "ignored-tool.tbl";
+    }
     if (
       path === "/work/invalid-tool-file-session.ini" &&
       section === "EMCIO" &&
@@ -430,6 +444,53 @@ assert.equal(
   "tooldata_load=0\nload_tool_path=/work/ini-file-session-tool.tbl\nrandom_toolchanger=0\n",
 );
 
+await saveMachineTextFiles("ini-override-session", {
+  ini: [
+    "[EMC]",
+    "MACHINE = ini-override-session",
+    "",
+    "[RS274NGC]",
+    "PARAMETER_FILE = ignored.var",
+    "",
+    "[EMCIO]",
+    "TOOL_TABLE = ignored-tool.tbl",
+    "",
+  ].join("\n"),
+}, { storage });
+await saveTextFile(
+  "linuxcnc/machines/ini-override-session/explicit.var",
+  "5161 11.0\n5162 22.0\n",
+  storage,
+);
+await saveTextFile(
+  "linuxcnc/machines/ini-override-session/explicit-tool.tbl",
+  "T3 P3 Z1.75 D0.375\n",
+  storage,
+);
+const loadedIniOverrideSession = await loadMachineSessionFromOpfs(
+  bridgeInterp,
+  "ini-override-session",
+  {
+    storage,
+    iniSdk: bridgeIniSdk,
+    iniWasmPath: "/work/ini-override-session.ini",
+    parameterFilename: "explicit.var",
+    parameterWasmPath: "/work/ini-override-session.var",
+    toolTableFilename: "explicit-tool.tbl",
+    toolTableWasmPath: "/work/ini-override-session-tool.tbl",
+  },
+);
+assert.equal(
+  loadedIniOverrideSession.parameters.opfsPath,
+  "linuxcnc/machines/ini-override-session/explicit.var",
+);
+assert.equal(
+  loadedIniOverrideSession.toolTable.opfsPath,
+  "linuxcnc/machines/ini-override-session/explicit-tool.tbl",
+);
+assert.equal(bridgeFiles.get("/work/ini-override-session.var"), "5161 11.0\n5162 22.0\n");
+assert.equal(bridgeFiles.get("/work/ini-override-session-tool.tbl"), "T3 P3 Z1.75 D0.375\n");
+
 await saveMachineTextFiles("invalid-ini-file-session", {
   ini: [
     "[EMC]",