diff --git a/wasm-port/docs/compatibility-validation.md b/wasm-port/docs/compatibility-validation.md
index 356a6c8..159ce3d 100644
--- a/wasm-port/docs/compatibility-validation.md
+++ b/wasm-port/docs/compatibility-validation.md
@@ -70,12 +70,14 @@ directory creation, text save/load, missing file behavior, invalid relative
 paths, unavailable OPFS storage, and the host-side OPFS path model for INI,
 tool table, parameter, G-code, preview-cache, and session-snapshot storage
 targets. It also validates the host-side session snapshot JSON envelope and
-round-trip store without defining CNC machine-state semantics.
+round-trip store plus pure-text machine file and G-code stores without
+defining CNC machine-state or file-format semantics.
 
 The browser smoke script serves `wasm-port/` over localhost and runs Chromium
 headless against a test page that imports the JS SDK, loads the INI WASM
 module, queries vendored LinuxCNC INI parsing through the SDK, and performs an
-OPFS text-file and generic session snapshot round trip.
+OPFS text-file, generic session snapshot, machine file, and G-code text
+round trip.
 
 The aggregate host smoke script builds the INI WASM artifact once, then runs
 the Node WASM smoke, the Node OPFS mock smoke, and the Chromium browser smoke.
@@ -127,8 +129,8 @@ The validation fails if:
 | Harness | Purpose |
 | --- | --- |
 | `tests/wasm/node/verify_ini_wasm.sh` | Validates the browser-facing INI WASM module can be built from vendored LinuxCNC `inifile.cc`, loaded through the JS SDK in Node, and queried through the exported C ABI. |
-| `tests/opfs/node/verify_file_service.sh` | Validates the host-owned OPFS text-file adapter, path model, and session snapshot store used by the browser INI panel without moving file persistence into the WASM core. |
-| `tests/browser/verify_ini_panel_browser.sh` | Validates the INI SDK, WASM module loading, OPFS text-file round trip, and generic session snapshot round trip in a real browser runtime. |
+| `tests/opfs/node/verify_file_service.sh` | Validates the host-owned OPFS text-file adapter, path model, session snapshot store, machine file store, and G-code text store used by the browser INI panel without moving file persistence into the WASM core. |
+| `tests/browser/verify_ini_panel_browser.sh` | Validates the INI SDK, WASM module loading, OPFS text-file round trip, generic session snapshot round trip, machine file text round trip, and G-code text round trip in a real browser runtime. |
 | `tests/host/verify_host_smokes.sh` | Runs the current host-side Node, WASM, OPFS, and browser smoke validation with a single INI WASM build. |
 
 ## Fixture Coverage
diff --git a/wasm-port/docs/drift-report.md b/wasm-port/docs/drift-report.md
index ead9574..cfa22fd 100644
--- a/wasm-port/docs/drift-report.md
+++ b/wasm-port/docs/drift-report.md
@@ -42,7 +42,7 @@ semantic rewrites:
 | Kinematics component lifecycle | Kinematics modules are initialized through LinuxCNC module entry points where native runtime probes exist, while HAL component init/ready/exit, HAL pin allocation, and RTAPI module metadata are handled by standalone shims. |
 | Go math C/C++ linkage | `genserkins` runtime probing compiles vendored `gomath.c` through a narrow C++ wrapper so LinuxCNC `genserfuncs.c` can link to the upstream Go math symbols without editing vendored source. |
 | Switchkins iterative forward | `genhexkins` runtime probing follows LinuxCNC switchkins iterative-forward behavior, including the first-call warmup path before asserting roundtrip convergence. |
-| Browser storage | OPFS remains outside the native core; `runtime/opfs/file-service.js` owns browser text-file persistence, `runtime/opfs/path-model.js` owns host-side storage paths for INI, tool table, parameter, G-code, preview-cache, and session-snapshot content, and `runtime/opfs/snapshot-store.js` owns generic JSON session snapshot persistence. |
+| Browser storage | OPFS remains outside the native core; `runtime/opfs/file-service.js` owns browser text-file persistence, `runtime/opfs/path-model.js` owns host-side storage paths for INI, tool table, parameter, G-code, preview-cache, and session-snapshot content, `runtime/opfs/snapshot-store.js` owns generic JSON session snapshot persistence, and `runtime/opfs/machine-file-store.js` owns pure-text machine-file and G-code persistence. |
 
 ## Enforced Non-Drift Rules
 
@@ -61,8 +61,9 @@ semantic rewrites:
 - JS SDK validation is currently limited to the INI WASM wrapper around
   vendored LinuxCNC `inifile.cc`.
 - OPFS validation covers a Node mock of the file-service adapter, the
-  host-side path model, generic session snapshot storage, and a Chromium
-  localhost round trip for INI text-file and session snapshot persistence.
+  host-side path model, generic session snapshot storage, pure-text machine
+  file and G-code storage, and a Chromium localhost round trip for those
+  persistence paths.
 - Host-side smoke validation is aggregated by
   `tests/host/verify_host_smokes.sh` so Node, WASM, OPFS, and browser checks
   run from one command.
diff --git a/wasm-port/docs/source-reuse-map.md b/wasm-port/docs/source-reuse-map.md
index dbec6a6..5fe2b80 100644
--- a/wasm-port/docs/source-reuse-map.md
+++ b/wasm-port/docs/source-reuse-map.md
@@ -51,7 +51,7 @@ Current validation is intentionally mechanical:
 
 | Dependency | LinuxCNC files that expose it | Standalone treatment |
 | --- | --- | --- |
-| Native file IO | `inifile.cc`, `rs274ngc_pre.cc`, parameter file paths | Allowed in native probes; browser OPFS remains a host-side adapter under `runtime/opfs/`, with path ownership in `runtime/opfs/path-model.js` and generic snapshot persistence in `runtime/opfs/snapshot-store.js` |
+| Native file IO | `inifile.cc`, `rs274ngc_pre.cc`, parameter file paths | Allowed in native probes; browser OPFS remains a host-side adapter under `runtime/opfs/`, with path ownership in `runtime/opfs/path-model.js`, generic snapshot persistence in `runtime/opfs/snapshot-store.js`, and pure-text machine-file persistence in `runtime/opfs/machine-file-store.js` |
 | RTAPI | `rtapi_*.h`, TP, posemath, motion headers | Minimal standalone shim in `runtime/core/shims/rtapi.h` |
 | NML transport | `emc.hh`, motion/NML type headers | Transport is not ported; only the status/type edges needed by vendored compute code are exposed through standalone shims and probes |
 | HAL runtime | named parameter lookup, kinematics component lifecycle, and runtime status edges | Standalone HAL adapter under `runtime/core/linuxcnc_wrap/` |
@@ -75,7 +75,9 @@ Current validation is intentionally mechanical:
   `runtime/opfs/file-service.js` adapter. `runtime/opfs/path-model.js` now
   defines paths for INI, tool table, parameter file, G-code program,
   preview-cache, and session-snapshot targets. `runtime/opfs/snapshot-store.js`
-  adds a generic JSON session snapshot envelope; semantic loading for tool
+  adds a generic JSON session snapshot envelope.
+  `runtime/opfs/machine-file-store.js` adds pure-text storage for INI, tool
+  table, parameter file, and G-code program content; semantic loading for tool
   tables, parameter files, G-code programs, and machine-state restoration
   remains future work.
 - Native LinuxCNC GUI code remains out of scope for implementation.
diff --git a/wasm-port/runtime/opfs/machine-file-store.js b/wasm-port/runtime/opfs/machine-file-store.js
new file mode 100644
index 0000000..94528d4
--- /dev/null
+++ b/wasm-port/runtime/opfs/machine-file-store.js
@@ -0,0 +1,54 @@
+import { loadTextFile, saveTextFile } from "./file-service.js";
+import {
+  gcodeProgramPath,
+  machineIniPath,
+  parameterFilePath,
+  toolTablePath,
+} from "./path-model.js";
+
+const MACHINE_FILE_PATHS = {
+  ini: machineIniPath,
+  toolTable: toolTablePath,
+  parameters: parameterFilePath,
+};
+
+export function machineFilePaths(machineId) {
+  return {
+    ini: machineIniPath(machineId),
+    toolTable: toolTablePath(machineId),
+    parameters: parameterFilePath(machineId),
+  };
+}
+
+export async function saveMachineTextFiles(machineId, files, options = {}) {
+  if (files === null || typeof files !== "object" || Array.isArray(files)) {
+    throw new Error("machine files must be a plain object.");
+  }
+
+  const paths = machineFilePaths(machineId);
+  for (const [name, pathFor] of Object.entries(MACHINE_FILE_PATHS)) {
+    if (Object.hasOwn(files, name)) {
+      await saveTextFile(pathFor(machineId), String(files[name]), options.storage);
+    }
+  }
+  return paths;
+}
+
+export async function loadMachineTextFiles(machineId, options = {}) {
+  const paths = machineFilePaths(machineId);
+  return {
+    ini: await loadTextFile(paths.ini, options.storage),
+    toolTable: await loadTextFile(paths.toolTable, options.storage),
+    parameters: await loadTextFile(paths.parameters, options.storage),
+  };
+}
+
+export async function saveGcodeProgram(filename, text, options = {}) {
+  const path = gcodeProgramPath(filename);
+  await saveTextFile(path, text, options.storage);
+  return path;
+}
+
+export async function loadGcodeProgram(filename, options = {}) {
+  return loadTextFile(gcodeProgramPath(filename), options.storage);
+}
diff --git a/wasm-port/tests/browser/ini_panel_smoke.html b/wasm-port/tests/browser/ini_panel_smoke.html
index 5e99015..26c4d9b 100644
--- a/wasm-port/tests/browser/ini_panel_smoke.html
+++ b/wasm-port/tests/browser/ini_panel_smoke.html
@@ -14,6 +14,12 @@
       loadSessionSnapshot,
       saveSessionSnapshot,
     } from "../../runtime/opfs/snapshot-store.js";
+    import {
+      loadGcodeProgram,
+      loadMachineTextFiles,
+      saveGcodeProgram,
+      saveMachineTextFiles,
+    } from "../../runtime/opfs/machine-file-store.js";
 
     const status = document.getElementById("status");
 
@@ -72,6 +78,18 @@ JOINTS = 3
       assertEqual(loadedSnapshot.payload.files.ini, opfsPath, "snapshot payload");
       assertEqual(loadedSnapshot.metadata.source, "browser-smoke", "snapshot metadata");
 
+      await saveMachineTextFiles("browser-smoke", {
+        ini: iniText,
+        toolTable: "T0 P0 ; no tool\n",
+        parameters: "5161 0.0\n",
+      });
+      const machineFiles = await loadMachineTextFiles("browser-smoke");
+      assertEqual(machineFiles.ini, iniText, "machine ini text");
+      assertEqual(machineFiles.toolTable, "T0 P0 ; no tool\n", "tool table text");
+      assertEqual(machineFiles.parameters, "5161 0.0\n", "parameter text");
+      await saveGcodeProgram("browser-smoke.ngc", "G0 X0 Y0\nM2\n");
+      assertEqual(await loadGcodeProgram("browser-smoke.ngc"), "G0 X0 Y0\nM2\n", "gcode text");
+
       status.textContent = "browser_ini_opfs_smoke=ok";
     } catch (error) {
       status.textContent = `browser_ini_opfs_smoke=fail ${error.stack || error.message}`;
diff --git a/wasm-port/tests/opfs/node/verify_file_service.mjs b/wasm-port/tests/opfs/node/verify_file_service.mjs
index c93db78..d1811a9 100644
--- a/wasm-port/tests/opfs/node/verify_file_service.mjs
+++ b/wasm-port/tests/opfs/node/verify_file_service.mjs
@@ -21,6 +21,13 @@ import {
   saveSessionSnapshot,
   validateSessionSnapshot,
 } from "../../../runtime/opfs/snapshot-store.js";
+import {
+  loadGcodeProgram,
+  loadMachineTextFiles,
+  machineFilePaths,
+  saveGcodeProgram,
+  saveMachineTextFiles,
+} from "../../../runtime/opfs/machine-file-store.js";
 
 class MockFileHandle {
   constructor(name) {
@@ -91,6 +98,7 @@ assert.deepEqual(defaultMachinePaths("xyzab-tdr"), {
   toolTable: "linuxcnc/machines/xyzab-tdr/tool.tbl",
   parameters: "linuxcnc/machines/xyzab-tdr/linuxcnc.var",
 });
+assert.deepEqual(machineFilePaths("xyzab-tdr"), defaultMachinePaths("xyzab-tdr"));
 
 const snapshotPayload = {
   files: {
@@ -129,6 +137,22 @@ await saveSessionSnapshot("session-1", snapshotPayload, {
 });
 assert.deepEqual(await loadSessionSnapshot("session-1", { storage }), snapshot);
 
+await saveMachineTextFiles("xyzab-tdr", {
+  ini: "[EMC]\nMACHINE = xyzab-tdr\n",
+  toolTable: "T0 P0 ; no tool\nT2 P2 Z1.25 D0.25\n",
+  parameters: "5161 0.0\n5162 0.0\n",
+}, { storage });
+assert.deepEqual(await loadMachineTextFiles("xyzab-tdr", { storage }), {
+  ini: "[EMC]\nMACHINE = xyzab-tdr\n",
+  toolTable: "T0 P0 ; no tool\nT2 P2 Z1.25 D0.25\n",
+  parameters: "5161 0.0\n5162 0.0\n",
+});
+assert.equal(
+  await saveGcodeProgram("fixture.ngc", "G0 X0 Y0\nM2\n", { storage }),
+  "linuxcnc/gcode/fixture.ngc",
+);
+assert.equal(await loadGcodeProgram("fixture.ngc", { storage }), "G0 X0 Y0\nM2\n");
+
 await assert.rejects(
   () => loadTextFile("linuxcnc/machines/missing.ini", storage),
   /missing file/,
@@ -141,6 +165,10 @@ assert.throws(
   () => machineIniPath("../escape"),
   /Invalid machine id/,
 );
+await assert.rejects(
+  () => saveMachineTextFiles("xyzab-tdr", null, { storage }),
+  /machine files must be a plain object/,
+);
 await saveTextFile(sessionSnapshotPath("bad-json"), "{", storage);
 await assert.rejects(
   () => loadSessionSnapshot("bad-json", { storage }),