Guard browser OPFS machine file write helper

text7.txt

@@ -2182,3 +2182,61 @@ browser/OPFS boundary guard，不改变 LinuxCNC-owned interpreter、INI、tool
 ```bash
 git status --short && git log -5 --oneline && tail -n 120 text7.txt && awk '/^[一二三四五六七八九十百]+、/ {print}' text7.txt | sort | uniq -d
 ```
+
+三十七、2026-06-13 继续执行记录：browser OPFS machine file write helper guard
+
+1. 本批目标。
+
+继续 staged path guard inventory 第三十二轮，收敛 browser OPFS smoke 中 custom
+session 机器文件写入的 inline OPFS path：
+
+```text
+browser-ini-file-session
+browser-ini-override-session
+```
+
+2. 已完成改动。
+
+- browser smoke 新增 `writeOpfsMachineFile(...)`；
+- INI-derived custom session 的 custom parameter/tool-table 写入改为走 helper；
+- explicit override custom session 的 custom parameter/tool-table 写入改为走 helper；
+- helper 只包装 `opfsMachineFilePath(...)` + `saveTextFile(...)`，不改变写入语义；
+- 未修改 OPFS bridge behavior、file-service、path-model、SDK planner、interpreter 或
+  LinuxCNC-owned runtime semantics。
+
+涉及文件：
+
+```text
+wasm-port/tests/browser/interp_smoke.html
+```
+
+3. 已完成验证。
+
+```bash
+git diff --check
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_interp_browser.sh
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+提交建议：
+
+```text
+Guard browser OPFS machine file write helper
+```
+
+4. 下一步工作建议。
+
+继续 staged path guard inventory 第三十三轮，优先扫描 browser OPFS smoke 中
+`browser-ini-file-session` 和 `browser-ini-override-session` 的 session path/backup path
+组合是否还能再收敛为更小的 session-file helper；仍只加 browser/OPFS boundary guard，
+不改变 LinuxCNC-owned interpreter、INI、tool、parameter 或 runtime semantics。
+
+下一轮第一条命令仍保持：
+
+```bash
+git status --short && git log -5 --oneline && tail -n 120 text7.txt && awk '/^[一二三四五六七八九十百]+、/ {print}' text7.txt | sort | uniq -d
+```

wasm-port/tests/browser/interp_smoke.html

@@ -4539,6 +4539,12 @@
       verifyExpectedOutput(label, await loadTextFile(opfsPath), expectedText);
     }
 
+    async function writeOpfsMachineFile(machineId, filename, text) {
+      const opfsPath = opfsMachineFilePath(machineId, filename);
+      await saveTextFile(opfsPath, text);
+      return opfsPath;
+    }
+
     function assertOpfsSessionStaging(label, session, machineId, expectedPaths) {
       if (session.machineId !== machineId) {
         throw new Error(`${label}: unexpected machine id ${session.machineId}`);
@@ -9389,8 +9395,9 @@
         browserIniFileTextPaths,
         "browser-ini-file-session",
       );
-      await saveTextFile(
+      await writeOpfsMachineFile(
-        "linuxcnc/machines/browser-ini-file-session/browser-custom.var",
+        "browser-ini-file-session",
+        "browser-custom.var",
         [
           "5161 31.25",
           "5162 62.5",
@@ -9400,8 +9407,9 @@
           "",
         ].join("\n"),
       );
-      await saveTextFile(
+      await writeOpfsMachineFile(
-        "linuxcnc/machines/browser-ini-file-session/browser-custom-tool.tbl",
+        "browser-ini-file-session",
+        "browser-custom-tool.tbl",
         "T8 P8 Z4.5 D0.5 ;browser custom tool\n",
       );
       const loadedIniFileSession = await loadMachineSessionFromOpfs(
@@ -9560,8 +9568,9 @@
         browserIniOverrideTextPaths,
         "browser-ini-override-session",
       );
-      await saveTextFile(
+      await writeOpfsMachineFile(
-        "linuxcnc/machines/browser-ini-override-session/browser-explicit.var",
+        "browser-ini-override-session",
+        "browser-explicit.var",
         [
           "5161 41.25",
           "5162 82.5",
@@ -9571,8 +9580,9 @@
           "",
         ].join("\n"),
       );
-      await saveTextFile(
+      await writeOpfsMachineFile(
-        "linuxcnc/machines/browser-ini-override-session/browser-explicit-tool.tbl",
+        "browser-ini-override-session",
+        "browser-explicit-tool.tbl",
         "T9 P9 Z5.5 D0.625 ;browser explicit tool\n",
       );
       const loadedIniOverrideSession = await loadMachineSessionFromOpfs(