diff --git a/text8.txt b/text8.txt
index 817258c..74a5268 100644
--- a/text8.txt
+++ b/text8.txt
@@ -1218,3 +1218,55 @@ host_wasm_opfs_browser_smokes=ok
 还能用只读 helper 收敛，例如 MACHINE、PARAMETER_FILE、TOOL_TABLE 的 INI lines；
 只改测试胶水，保持精确文本校验，不改变 custom filename 输入、OPFS path、WASM path
 字符串或保存/读取行为。
+
+二十七、2026-06-14 继续执行记录：browser OPFS custom session INI seed helper guard
+
+本轮按上一条下一步建议继续收敛 custom session INI seed text，范围仍只触及
+`wasm-port/tests/browser/interp_smoke.html` 的 browser/OPFS test glue。
+
+完成内容：
+
+- 新增 `opfsCustomSessionIniText(...)`，统一 custom session INI seed text 中
+  `[EMC]`、`MACHINE`、`[RS274NGC]`、`PARAMETER_FILE`、`[EMCIO]`、
+  `TOOL_TABLE` 的写入文本；
+- INI-named session 的 custom INI seed 写入复用
+  `opfsCustomSessionIniText(...)`；
+- explicit override session 的 ignored INI filename seed 写入复用
+  `opfsCustomSessionIniText(...)`；
+- INI seed text 仍保留各 section 间空行和末尾空行，实际写入内容不变；
+- custom parameter/tool-table filename 输入、OPFS path、WASM path 字符串与
+  save/read 行为均未改变；
+- 未改变 staging path 模型、OPFS bridge behavior、file-service、SDK planner、
+  interpreter、INI、tool、parameter 或 LinuxCNC-owned runtime semantics。
+
+验证已通过：
+
+```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
+```
+
+关键输出：
+
+```text
+browser_interp_smoke=ok
+vendor sync up to date
+standalone CNC semantics guard complete
+interp_wasm_node_smoke=ok
+sim_configs_wasm_node_inventory_executed=28
+sim_configs_wasm_node_inventory_passed=28
+sim_configs_wasm_node_inventory_skipped=131
+sim_configs_wasm_node_inventory_unexpected_fail=0
+host_wasm_opfs_browser_smokes=ok
+```
+
+下一步建议：
+
+继续小批量 browser OPFS test glue guard。优先扫描 custom session 中
+`loadMachineSessionFromOpfs(...)` options object 是否还能用 helper/locals 收敛；
+只改测试胶水，不改变 custom filename 输入、OPFS path、WASM path 字符串或保存/读取行为。
diff --git a/wasm-port/tests/browser/interp_smoke.html b/wasm-port/tests/browser/interp_smoke.html
index 2a6266a..e932dee 100644
--- a/wasm-port/tests/browser/interp_smoke.html
+++ b/wasm-port/tests/browser/interp_smoke.html
@@ -4600,6 +4600,20 @@
       return `T${toolNo} P${pocketNo} Z${zOffset} D${diameter} ${comment}\n`;
     }
 
+    function opfsCustomSessionIniText(machineId, parameterFilename, toolTableFilename) {
+      return [
+        "[EMC]",
+        `MACHINE = ${machineId}`,
+        "",
+        "[RS274NGC]",
+        `PARAMETER_FILE = ${parameterFilename}`,
+        "",
+        "[EMCIO]",
+        `TOOL_TABLE = ${toolTableFilename}`,
+        "",
+      ].join("\n");
+    }
+
     async function verifyOpfsSavedText(label, loadActualText, expectedLines) {
       verifyExpectedOutput(label, await loadActualText(), expectedLines.join("\n"));
     }
@@ -9502,17 +9516,11 @@
       const iniFileParameterWasmPath = opfsCustomSessionWasmPath(iniFileParameterFilename);
       const iniFileToolTableWasmPath = opfsCustomSessionWasmPath(iniFileToolTableFilename);
       const browserIniFileTextPaths = await saveMachineTextFiles(iniFileMachineId, {
-        ini: [
-          "[EMC]",
-          `MACHINE = ${iniFileMachineId}`,
-          "",
-          "[RS274NGC]",
-          `PARAMETER_FILE = ${iniFileParameterFilename}`,
-          "",
-          "[EMCIO]",
-          `TOOL_TABLE = ${iniFileToolTableFilename}`,
-          "",
-        ].join("\n"),
+        ini: opfsCustomSessionIniText(
+          iniFileMachineId,
+          iniFileParameterFilename,
+          iniFileToolTableFilename,
+        ),
       });
       assertMachineTextStorePaths(
         "opfs_save_ini_named_machine_text_files_staging",
@@ -9636,17 +9644,11 @@
       const explicitParameterWasmPath = opfsCustomSessionWasmPath(explicitParameterFilename);
       const explicitToolTableWasmPath = opfsCustomSessionWasmPath(explicitToolTableFilename);
       const browserIniOverrideTextPaths = await saveMachineTextFiles(iniOverrideMachineId, {
-        ini: [
-          "[EMC]",
-          `MACHINE = ${iniOverrideMachineId}`,
-          "",
-          "[RS274NGC]",
-          "PARAMETER_FILE = browser-ignored.var",
-          "",
-          "[EMCIO]",
-          "TOOL_TABLE = browser-ignored-tool.tbl",
-          "",
-        ].join("\n"),
+        ini: opfsCustomSessionIniText(
+          iniOverrideMachineId,
+          "browser-ignored.var",
+          "browser-ignored-tool.tbl",
+        ),
       });
       assertMachineTextStorePaths(
         "opfs_save_ini_override_machine_text_files_staging",