diff --git a/text7.txt b/text7.txt
index 047d184..4b68e3a 100644
--- a/text7.txt
+++ b/text7.txt
@@ -2409,3 +2409,60 @@ 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
 ```
+
+四十一、2026-06-13 继续执行记录：browser OPFS custom session filename constants guard
+
+1. 本批目标。
+
+继续 staged path guard inventory 第三十六轮，收敛 browser OPFS smoke 中 custom
+session 的 repeated filename literals。
+
+2. 已完成改动。
+
+- INI-derived custom session block 新增局部 constants：
+  `iniFileMachineId`、`iniFileParameterFilename`、`iniFileToolTableFilename`；
+- explicit override custom session block 新增局部 constants：
+  `iniOverrideMachineId`、`explicitParameterFilename`、`explicitToolTableFilename`；
+- machine text、custom OPFS write、runtime input、session staging、save staging 均改为
+  复用对应局部 constants；
+- 常量只保留在 browser smoke 对应测试 block 内，避免扩大抽象范围；
+- 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 custom session filename constants
+```
+
+4. 下一步工作建议。
+
+继续 staged path guard inventory 第三十七轮，优先扫描 browser OPFS smoke 中 custom
+session 的 INI WASM path (`/work/browser-ini-file-session.ini` 与
+`/work/browser-ini-override-session.ini`) 是否值得同样局部常量化；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
+```
diff --git a/wasm-port/tests/browser/interp_smoke.html b/wasm-port/tests/browser/interp_smoke.html
index 64ec1bf..758bd4f 100644
--- a/wasm-port/tests/browser/interp_smoke.html
+++ b/wasm-port/tests/browser/interp_smoke.html
@@ -9395,27 +9395,30 @@
         ].join("\n"),
       );
 
-      const browserIniFileTextPaths = await saveMachineTextFiles("browser-ini-file-session", {
+      const iniFileMachineId = "browser-ini-file-session";
+      const iniFileParameterFilename = "browser-custom.var";
+      const iniFileToolTableFilename = "browser-custom-tool.tbl";
+      const browserIniFileTextPaths = await saveMachineTextFiles(iniFileMachineId, {
         ini: [
           "[EMC]",
-          "MACHINE = browser-ini-file-session",
+          `MACHINE = ${iniFileMachineId}`,
           "",
           "[RS274NGC]",
-          "PARAMETER_FILE = browser-custom.var",
+          `PARAMETER_FILE = ${iniFileParameterFilename}`,
           "",
           "[EMCIO]",
-          "TOOL_TABLE = browser-custom-tool.tbl",
+          `TOOL_TABLE = ${iniFileToolTableFilename}`,
           "",
         ].join("\n"),
       });
       assertMachineTextStorePaths(
         "opfs_save_ini_named_machine_text_files_staging",
         browserIniFileTextPaths,
-        "browser-ini-file-session",
+        iniFileMachineId,
       );
       await writeOpfsMachineFile(
-        "browser-ini-file-session",
-        "browser-custom.var",
+        iniFileMachineId,
+        iniFileParameterFilename,
         [
           "5161 31.25",
           "5162 62.5",
@@ -9426,28 +9429,28 @@
         ].join("\n"),
       );
       await writeOpfsMachineFile(
-        "browser-ini-file-session",
-        "browser-custom-tool.tbl",
+        iniFileMachineId,
+        iniFileToolTableFilename,
         "T8 P8 Z4.5 D0.5 ;browser custom tool\n",
       );
       const loadedIniFileSession = await loadMachineSessionFromOpfs(
         interp,
-        "browser-ini-file-session",
+        iniFileMachineId,
         {
           iniSdk: ini,
           iniWasmPath: "/work/browser-ini-file-session.ini",
-          parameterWasmPath: opfsCustomSessionWasmPath("browser-custom.var"),
-          toolTableWasmPath: opfsCustomSessionWasmPath("browser-custom-tool.tbl"),
+          parameterWasmPath: opfsCustomSessionWasmPath(iniFileParameterFilename),
+          toolTableWasmPath: opfsCustomSessionWasmPath(iniFileToolTableFilename),
         },
       );
       assertOpfsSessionStaging(
         "opfs_load_ini_named_session_staging",
         loadedIniFileSession,
-        "browser-ini-file-session",
+        iniFileMachineId,
         opfsCustomSessionPaths(
-          "browser-ini-file-session",
-          "browser-custom.var",
-          "browser-custom-tool.tbl",
+          iniFileMachineId,
+          iniFileParameterFilename,
+          iniFileToolTableFilename,
           "/work/browser-ini-file-session.ini",
         ),
       );
@@ -9464,7 +9467,7 @@
       );
       const savedIniNamedParameters = await saveMachineParametersToOpfs(
         interp,
-        "browser-ini-file-session",
+        iniFileMachineId,
         {
           5161: 33.75,
           5162: 67.5,
@@ -9480,9 +9483,9 @@
       assertOpfsSavedParameterStaging(
         "opfs_save_ini_named_parameters_staging",
         savedIniNamedParameters,
-        "browser-ini-file-session",
-        "browser-custom.var",
-        opfsCustomSessionWasmPath("browser-custom.var"),
+        iniFileMachineId,
+        iniFileParameterFilename,
+        opfsCustomSessionWasmPath(iniFileParameterFilename),
       );
       verifyExpectedOutput(
         "opfs_save_ini_named_parameter_file",
@@ -9529,7 +9532,7 @@
       );
       const savedIniNamedToolTable = await saveMachineToolTableToOpfs(
         interp,
-        "browser-ini-file-session",
+        iniFileMachineId,
         {
           opfsPath: loadedIniFileSession.toolTable.opfsPath,
           wasmPath: loadedIniFileSession.toolTable.wasmPath,
@@ -9538,9 +9541,9 @@
       assertOpfsSavedToolTableStaging(
         "opfs_save_ini_named_tool_table_staging",
         savedIniNamedToolTable,
-        "browser-ini-file-session",
-        "browser-custom-tool.tbl",
-        opfsCustomSessionWasmPath("browser-custom-tool.tbl"),
+        iniFileMachineId,
+        iniFileToolTableFilename,
+        opfsCustomSessionWasmPath(iniFileToolTableFilename),
       );
       verifyExpectedOutput(
         "opfs_save_ini_named_tool_table",
@@ -9563,10 +9566,13 @@
         ].join("\n"),
       );
 
-      const browserIniOverrideTextPaths = await saveMachineTextFiles("browser-ini-override-session", {
+      const iniOverrideMachineId = "browser-ini-override-session";
+      const explicitParameterFilename = "browser-explicit.var";
+      const explicitToolTableFilename = "browser-explicit-tool.tbl";
+      const browserIniOverrideTextPaths = await saveMachineTextFiles(iniOverrideMachineId, {
         ini: [
           "[EMC]",
-          "MACHINE = browser-ini-override-session",
+          `MACHINE = ${iniOverrideMachineId}`,
           "",
           "[RS274NGC]",
           "PARAMETER_FILE = browser-ignored.var",
@@ -9579,11 +9585,11 @@
       assertMachineTextStorePaths(
         "opfs_save_ini_override_machine_text_files_staging",
         browserIniOverrideTextPaths,
-        "browser-ini-override-session",
+        iniOverrideMachineId,
       );
       await writeOpfsMachineFile(
-        "browser-ini-override-session",
-        "browser-explicit.var",
+        iniOverrideMachineId,
+        explicitParameterFilename,
         [
           "5161 41.25",
           "5162 82.5",
@@ -9594,30 +9600,30 @@
         ].join("\n"),
       );
       await writeOpfsMachineFile(
-        "browser-ini-override-session",
-        "browser-explicit-tool.tbl",
+        iniOverrideMachineId,
+        explicitToolTableFilename,
         "T9 P9 Z5.5 D0.625 ;browser explicit tool\n",
       );
       const loadedIniOverrideSession = await loadMachineSessionFromOpfs(
         interp,
-        "browser-ini-override-session",
+        iniOverrideMachineId,
         {
           iniSdk: ini,
           iniWasmPath: "/work/browser-ini-override-session.ini",
-          parameterFilename: "browser-explicit.var",
-          parameterWasmPath: opfsCustomSessionWasmPath("browser-explicit.var"),
-          toolTableFilename: "browser-explicit-tool.tbl",
-          toolTableWasmPath: opfsCustomSessionWasmPath("browser-explicit-tool.tbl"),
+          parameterFilename: explicitParameterFilename,
+          parameterWasmPath: opfsCustomSessionWasmPath(explicitParameterFilename),
+          toolTableFilename: explicitToolTableFilename,
+          toolTableWasmPath: opfsCustomSessionWasmPath(explicitToolTableFilename),
         },
       );
       assertOpfsSessionStaging(
         "opfs_load_explicit_session_staging",
         loadedIniOverrideSession,
-        "browser-ini-override-session",
+        iniOverrideMachineId,
         opfsCustomSessionPaths(
-          "browser-ini-override-session",
-          "browser-explicit.var",
-          "browser-explicit-tool.tbl",
+          iniOverrideMachineId,
+          explicitParameterFilename,
+          explicitToolTableFilename,
           "/work/browser-ini-override-session.ini",
         ),
       );
@@ -9646,7 +9652,7 @@
       );
       const savedExplicitParameters = await saveMachineParametersToOpfs(
         interp,
-        "browser-ini-override-session",
+        iniOverrideMachineId,
         {
           5161: 51.25,
           5162: 102.5,
@@ -9662,9 +9668,9 @@
       assertOpfsSavedParameterStaging(
         "opfs_save_explicit_parameters_staging",
         savedExplicitParameters,
-        "browser-ini-override-session",
-        "browser-explicit.var",
-        opfsCustomSessionWasmPath("browser-explicit.var"),
+        iniOverrideMachineId,
+        explicitParameterFilename,
+        opfsCustomSessionWasmPath(explicitParameterFilename),
       );
       verifyExpectedOutput(
         "opfs_save_explicit_parameter_file",
@@ -9699,7 +9705,7 @@
       );
       const savedExplicitToolTable = await saveMachineToolTableToOpfs(
         interp,
-        "browser-ini-override-session",
+        iniOverrideMachineId,
         {
           opfsPath: loadedIniOverrideSession.toolTable.opfsPath,
           wasmPath: loadedIniOverrideSession.toolTable.wasmPath,
@@ -9708,9 +9714,9 @@
       assertOpfsSavedToolTableStaging(
         "opfs_save_explicit_tool_table_staging",
         savedExplicitToolTable,
-        "browser-ini-override-session",
-        "browser-explicit-tool.tbl",
-        opfsCustomSessionWasmPath("browser-explicit-tool.tbl"),
+        iniOverrideMachineId,
+        explicitToolTableFilename,
+        opfsCustomSessionWasmPath(explicitToolTableFilename),
       );
       verifyExpectedOutput(
         "opfs_save_explicit_tool_table",