diff --git a/wasm-port/runtime/opfs/snapshot-store.js b/wasm-port/runtime/opfs/snapshot-store.js
index 0344247..01b83ed 100644
--- a/wasm-port/runtime/opfs/snapshot-store.js
+++ b/wasm-port/runtime/opfs/snapshot-store.js
@@ -12,8 +12,10 @@ import {
   VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_FIXTURES,
   VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES,
   VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS,
+  VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY,
   cloneVirtualHalState,
   createVirtualHalCommandScriptFixtureReport,
+  createVirtualHalMillturnUserMProcessBoundaryReport,
   createVirtualHalMotionControllerMatrixReport,
   createVirtualHalSimConfigEvidenceExpansionReport,
   createVirtualHalSimConfigMacroLoadFixtureReport,
@@ -74,6 +76,7 @@ function validateVirtualHalSessionPayload(virtualHal) {
   assertPlainObject(virtualHal.sourceCompliance, "virtual HAL session source compliance");
   assertPlainObject(virtualHal.simConfigSourceCoverage, "virtual HAL session sim-config source coverage");
   assertPlainObject(virtualHal.simConfigPromotionCandidates, "virtual HAL session sim-config promotion candidates");
+  assertPlainObject(virtualHal.millturnUserMProcessBoundary, "virtual HAL session millturn user-M process boundary");
   assertPlainObject(virtualHal.simConfigMacroLoadFixtures, "virtual HAL session sim-config macro/load fixtures");
   assertPlainObject(virtualHal.commandScriptFixtures, "virtual HAL session command script fixtures");
   assertPlainObject(virtualHal.motionControllerMatrix, "virtual HAL session motion controller matrix");
@@ -89,6 +92,9 @@ function validateVirtualHalSessionPayload(virtualHal) {
   if (virtualHal.simConfigPromotionCandidates.complete !== true) {
     throw new Error("virtual HAL sim-config promotion candidates are incomplete.");
   }
+  if (virtualHal.millturnUserMProcessBoundary.complete !== true) {
+    throw new Error("virtual HAL millturn user-M process boundary is incomplete.");
+  }
   if (virtualHal.simConfigEvidenceExpansion.complete !== true) {
     throw new Error("virtual HAL sim-config evidence expansion candidates are incomplete.");
   }
@@ -116,6 +122,7 @@ export function createVirtualHalSessionPayload(halState = createVirtualHalState(
               ...VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES.flatMap((candidate) => candidate.sourceFiles ?? []),
               ...VIRTUAL_HAL_SIM_CONFIG_EVIDENCE_EXPANSION_CANDIDATES.flatMap((candidate) => candidate.sourceFiles ?? []),
               ...VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_FIXTURES.flatMap((fixture) => fixture.sourceFiles ?? []),
+              ...VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
             ],
           }
         : {}
@@ -137,6 +144,7 @@ export function createVirtualHalSessionPayload(halState = createVirtualHalState(
     commandScriptFixtures,
     motionControllerMatrix,
   });
+  const millturnUserMProcessBoundary = options.millturnUserMProcessBoundary ?? createVirtualHalMillturnUserMProcessBoundaryReport(reportOptions);
   const sourceCompliance = options.sourceCompliance ?? createVirtualHalSourceComplianceReport({
     ...reportOptions,
     halState: state,
@@ -161,6 +169,7 @@ export function createVirtualHalSessionPayload(halState = createVirtualHalState(
     simConfigSourceCoverage,
     simConfigPromotionCandidates,
     simConfigEvidenceExpansion,
+    millturnUserMProcessBoundary,
     simConfigMacroLoadFixtures,
     commandScriptFixtures,
     motionControllerMatrix,
diff --git a/wasm-port/runtime/sdk/README.md b/wasm-port/runtime/sdk/README.md
index c3c6593..64cea05 100644
--- a/wasm-port/runtime/sdk/README.md
+++ b/wasm-port/runtime/sdk/README.md
@@ -318,7 +318,9 @@ private page state.
   `executeHalcmd()`, `stepMotion()`, `stepMotionController()`,
   `getSimulationRuntimeReport()`, `getSimulationReplacementReport()`,
   `getSourceComplianceReport()`, `getSimConfigPromotionCandidateReport()`,
-  `getSimConfigMacroLoadFixtureReport()`, `getIntegrityReport()`,
+  `getSimConfigMacroLoadFixtureReport()`,
+  `getMillturnUserMProcessBoundaryReport()`,
+  `applyMillturnUserMProcessState()`, `getIntegrityReport()`,
   `getPinInventory()`, `getProjectReport()`, and `applyToInterpSdk()`.
 - `VIRTUAL_HAL_SIMULATION_RUNTIME_CAPABILITIES`,
   `VIRTUAL_HAL_SIMULATION_REPLACEMENT_TARGETS`,
@@ -339,6 +341,18 @@ private page state.
   `manifestEntries`, the matrix report checks those associated sim-config
   source files against the vendored LinuxCNC manifest and exposes
   `manifestChecked` plus `missingManifestFiles`.
+- `VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY`,
+  `createVirtualHalMillturnUserMProcessBoundaryReport()`, and
+  `applyVirtualHalMillturnUserMProcessState()` expose the controlled
+  millturn `M128`/`M129` user-M process boundary for browser/Node simulation.
+  The report names the LinuxCNC `millturn.ini`, `example.ngc`, Tcl M-code
+  scripts, and remap callers, then lists the source-derived
+  `motion.switchkins-type`, `kinstype.is-*`, and `ini.[xyz].*` HAL state
+  targets. `applyVirtualHalMillturnUserMProcessState()` can apply that
+  controlled state to the virtual HAL for simulation display. It keeps
+  `executionEnabled === false`, `promotionAllowed === false`, and
+  `processExecutionReady === false`; it does not execute arbitrary external
+  user-M processes or unlock `L4-USER-M-PROCESS`.
 - `VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES` and
   `createVirtualHalSimConfigPromotionCandidateReport()` expose the current
   source-derived sim-config promotion candidate set. The first candidates keep
diff --git a/wasm-port/runtime/sdk/src/index.js b/wasm-port/runtime/sdk/src/index.js
index ebc1c39..bf2c68b 100644
--- a/wasm-port/runtime/sdk/src/index.js
+++ b/wasm-port/runtime/sdk/src/index.js
@@ -5,6 +5,7 @@ export {
   VIRTUAL_HAL_AXISUI_PINS,
   VIRTUAL_HAL_COMMAND_SCRIPT_FIXTURES,
   VIRTUAL_HAL_COVERAGE_STATES,
+  VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY,
   VIRTUAL_HAL_MOTION_CONTROLLER_MATRIX_FIXTURES,
   VIRTUAL_HAL_PROJECT_PIN_GROUPS,
   VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_AUDIT_CANDIDATES,
@@ -23,6 +24,7 @@ export {
   VIRTUAL_HAL_WASM_BRIDGE_FUNCTIONS,
   applyVirtualHalToInterpSdk,
   applyVirtualHalAction,
+  applyVirtualHalMillturnUserMProcessState,
   applyVirtualHalPinUpdates,
   cloneVirtualHalState,
   createLinuxCncVirtualHalRuntime,
@@ -34,6 +36,7 @@ export {
   createVirtualHalLimitsHomeState,
   createVirtualHalMachineStatusState,
   createVirtualHalIntegrityReport,
+  createVirtualHalMillturnUserMProcessBoundaryReport,
   createVirtualHalPinInventory,
   createVirtualHalPinRegistry,
   createVirtualHalProjectReport,
diff --git a/wasm-port/runtime/sdk/src/linuxcnc-hal.js b/wasm-port/runtime/sdk/src/linuxcnc-hal.js
index 51efbdc..77832d1 100644
--- a/wasm-port/runtime/sdk/src/linuxcnc-hal.js
+++ b/wasm-port/runtime/sdk/src/linuxcnc-hal.js
@@ -32,6 +32,84 @@ export const VIRTUAL_HAL_SOURCE_FILES = Object.freeze({
   vendoredMotionHeader: "wasm-port/vendor/linuxcnc/src/emc/motion/motion.h",
 });
 
+export const VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY = Object.freeze({
+  id: "millturn-user-m-process",
+  label: "Millturn M128/M129 user-M process boundary",
+  boundaryClass: "L4-USER-M-PROCESS",
+  path: "axis/vismach/millturn/example.ngc",
+  ini: "axis/vismach/millturn/millturn.ini",
+  requiredRuntime: "linuxcnc_task_hal_tcl_user_m_process",
+  sourceFiles: Object.freeze([
+    "linuxcnc/configs/sim/axis/vismach/millturn/millturn.ini",
+    "linuxcnc/configs/sim/axis/vismach/millturn/example.ngc",
+    "linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128",
+    "linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M129",
+    "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/428remap.ngc",
+    "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/429remap.ngc",
+  ]),
+  manifestSourceFiles: Object.freeze([
+    "linuxcnc/configs/sim/axis/vismach/millturn/millturn.ini",
+    "linuxcnc/configs/sim/axis/vismach/millturn/example.ngc",
+    "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/428remap.ngc",
+    "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/429remap.ngc",
+  ]),
+  nativeProbe: "ENABLE_MILLTURN_USER_M_RUNTIME_PROBE=1 bash wasm-port/tests/native/probe_millturn_user_m_runtime.sh",
+  cases: Object.freeze([
+    Object.freeze({
+      userMCode: "M128",
+      remapCode: "M428",
+      stateMode: "mill",
+      guardPin: "kinstype.is-0",
+      switchkinsOutputPin: "motion.analog-out-03",
+      switchkinsTarget: 0,
+      activeG5x: "G59.1",
+      workOffsetPocket: "P7",
+      workOffsetWords: "X-290 Y0 Z-160 A0",
+      sourceField: "MIN_LIMIT/MAX_LIMIT",
+      stateTargets: Object.freeze([
+        Object.freeze({ pin: "ini.x.min_limit", value: -300, sourceSection: "AXIS_X", sourceField: "MIN_LIMIT" }),
+        Object.freeze({ pin: "ini.x.max_limit", value: 300, sourceSection: "AXIS_X", sourceField: "MAX_LIMIT" }),
+        Object.freeze({ pin: "ini.x.min_velocity", value: 60.0, sourceSection: "AXIS_X", sourceField: "MAX_VELOCITY" }),
+        Object.freeze({ pin: "ini.x.max_acceleration", value: 400.0, sourceSection: "AXIS_X", sourceField: "MAX_ACCELERATION" }),
+        Object.freeze({ pin: "ini.y.min_limit", value: -100, sourceSection: "AXIS_Y", sourceField: "MIN_LIMIT" }),
+        Object.freeze({ pin: "ini.y.max_limit", value: 100, sourceSection: "AXIS_Y", sourceField: "MAX_LIMIT" }),
+        Object.freeze({ pin: "ini.y.min_velocity", value: 60.0, sourceSection: "AXIS_Y", sourceField: "MAX_VELOCITY" }),
+        Object.freeze({ pin: "ini.y.max_acceleration", value: 400.0, sourceSection: "AXIS_Y", sourceField: "MAX_ACCELERATION" }),
+        Object.freeze({ pin: "ini.z.min_limit", value: -240, sourceSection: "AXIS_Z", sourceField: "MIN_LIMIT" }),
+        Object.freeze({ pin: "ini.z.max_limit", value: 0, sourceSection: "AXIS_Z", sourceField: "MAX_LIMIT" }),
+        Object.freeze({ pin: "ini.z.min_velocity", value: 60.0, sourceSection: "AXIS_Z", sourceField: "MAX_VELOCITY" }),
+        Object.freeze({ pin: "ini.z.max_acceleration", value: 400.0, sourceSection: "AXIS_Z", sourceField: "MAX_ACCELERATION" }),
+      ]),
+    }),
+    Object.freeze({
+      userMCode: "M129",
+      remapCode: "M429",
+      stateMode: "turn",
+      guardPin: "kinstype.is-1",
+      switchkinsOutputPin: "motion.analog-out-03",
+      switchkinsTarget: 1,
+      activeG5x: "G59.2",
+      workOffsetPocket: "P8",
+      workOffsetWords: "X-160 Y0 Z-290 A0",
+      sourceField: "MIN_LIMIT_TURN/MAX_LIMIT_TURN",
+      stateTargets: Object.freeze([
+        Object.freeze({ pin: "ini.x.min_limit", value: -240, sourceSection: "AXIS_X", sourceField: "MIN_LIMIT_TURN" }),
+        Object.freeze({ pin: "ini.x.max_limit", value: 0, sourceSection: "AXIS_X", sourceField: "MAX_LIMIT_TURN" }),
+        Object.freeze({ pin: "ini.x.min_velocity", value: 60.0, sourceSection: "AXIS_X", sourceField: "MAX_VELOCITY" }),
+        Object.freeze({ pin: "ini.x.max_acceleration", value: 400.0, sourceSection: "AXIS_X", sourceField: "MAX_ACCELERATION" }),
+        Object.freeze({ pin: "ini.y.min_limit", value: -100, sourceSection: "AXIS_Y", sourceField: "MIN_LIMIT_TURN" }),
+        Object.freeze({ pin: "ini.y.max_limit", value: 100, sourceSection: "AXIS_Y", sourceField: "MAX_LIMIT_TURN" }),
+        Object.freeze({ pin: "ini.y.min_velocity", value: 60.0, sourceSection: "AXIS_Y", sourceField: "MAX_VELOCITY" }),
+        Object.freeze({ pin: "ini.y.max_acceleration", value: 400.0, sourceSection: "AXIS_Y", sourceField: "MAX_ACCELERATION" }),
+        Object.freeze({ pin: "ini.z.min_limit", value: -300, sourceSection: "AXIS_Z", sourceField: "MIN_LIMIT_TURN" }),
+        Object.freeze({ pin: "ini.z.max_limit", value: 300, sourceSection: "AXIS_Z", sourceField: "MAX_LIMIT_TURN" }),
+        Object.freeze({ pin: "ini.z.min_velocity", value: 60.0, sourceSection: "AXIS_Z", sourceField: "MAX_VELOCITY" }),
+        Object.freeze({ pin: "ini.z.max_acceleration", value: 400.0, sourceSection: "AXIS_Z", sourceField: "MAX_ACCELERATION" }),
+      ]),
+    }),
+  ]),
+});
+
 export const VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS = Object.freeze([
   Object.freeze({
     id: "axis-foam",
@@ -740,6 +818,31 @@ export const VIRTUAL_HAL_SYSTEM_PIN_FAMILIES = Object.freeze([
       { name: "motion.switchkins-type", type: "HAL_FLOAT", direction: "HAL_IN", conditional: "switchable kinematics" },
     ]),
   },
+  {
+    id: "millturn-user-m-process",
+    component: "millturn",
+    label: "Millturn user-M process boundary pins",
+    sourceFiles: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
+    sourceEvidence: "LinuxCNC millturn M128/M129 Tcl scripts and remap callers set switchkins guard state and ini.[xyz] HAL pins.",
+    coverage: VIRTUAL_HAL_COVERAGE_STATES.runtimeBoundary,
+    pins: Object.freeze([
+      { name: "motion.analog-out-03", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "kinstype.is-0", type: "HAL_BIT", direction: "HAL_OUT" },
+      { name: "kinstype.is-1", type: "HAL_BIT", direction: "HAL_OUT" },
+      { name: "ini.x.min_limit", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.x.max_limit", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.x.min_velocity", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.x.max_acceleration", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.y.min_limit", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.y.max_limit", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.y.min_velocity", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.y.max_acceleration", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.z.min_limit", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.z.max_limit", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.z.min_velocity", type: "HAL_FLOAT", direction: "HAL_OUT" },
+      { name: "ini.z.max_acceleration", type: "HAL_FLOAT", direction: "HAL_OUT" },
+    ]),
+  },
   {
     id: "axis-motion",
     component: "axis",
@@ -866,6 +969,11 @@ export const VIRTUAL_HAL_PROJECT_PIN_GROUPS = Object.freeze([
     label: "Tool pins",
     description: "Tool status, tool change, and motion tool-offset pins from HALUI, iocontrol, and motion.",
   },
+  {
+    id: "user-m-process",
+    label: "User-M process boundary pins",
+    description: "Controlled millturn M128/M129 state pins sourced from LinuxCNC Tcl user-M scripts and remap callers.",
+  },
 ]);
 
 export const VIRTUAL_HAL_SIMULATION_RUNTIME_CAPABILITIES = Object.freeze([
@@ -879,6 +987,7 @@ export const VIRTUAL_HAL_SIMULATION_RUNTIME_CAPABILITIES = Object.freeze([
   "axis-joint-position-feedback",
   "spindle-coolant-tool-status",
   "interpreter-hal-bridge-snapshot",
+  "controlled-user-m-process-state-boundary",
 ]);
 
 export const VIRTUAL_HAL_SIMULATION_REPLACEMENT_TARGETS = Object.freeze([
@@ -887,6 +996,24 @@ export const VIRTUAL_HAL_SIMULATION_REPLACEMENT_TARGETS = Object.freeze([
   "motion-controller",
 ]);
 
+const VIRTUAL_HAL_DEFAULT_MILLTURN_USER_M_EXTERNAL_PINS = Object.freeze({
+  "motion.analog-out-03": Object.freeze({ kind: "pin", name: "motion.analog-out-03", type: "HAL_FLOAT", value: 0, connected: true }),
+  "kinstype.is-0": Object.freeze({ kind: "pin", name: "kinstype.is-0", type: "HAL_BIT", value: 0, connected: true }),
+  "kinstype.is-1": Object.freeze({ kind: "pin", name: "kinstype.is-1", type: "HAL_BIT", value: 0, connected: true }),
+  "ini.x.min_limit": Object.freeze({ kind: "pin", name: "ini.x.min_limit", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.x.max_limit": Object.freeze({ kind: "pin", name: "ini.x.max_limit", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.x.min_velocity": Object.freeze({ kind: "pin", name: "ini.x.min_velocity", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.x.max_acceleration": Object.freeze({ kind: "pin", name: "ini.x.max_acceleration", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.y.min_limit": Object.freeze({ kind: "pin", name: "ini.y.min_limit", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.y.max_limit": Object.freeze({ kind: "pin", name: "ini.y.max_limit", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.y.min_velocity": Object.freeze({ kind: "pin", name: "ini.y.min_velocity", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.y.max_acceleration": Object.freeze({ kind: "pin", name: "ini.y.max_acceleration", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.z.min_limit": Object.freeze({ kind: "pin", name: "ini.z.min_limit", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.z.max_limit": Object.freeze({ kind: "pin", name: "ini.z.max_limit", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.z.min_velocity": Object.freeze({ kind: "pin", name: "ini.z.min_velocity", type: "HAL_FLOAT", value: 0, connected: true }),
+  "ini.z.max_acceleration": Object.freeze({ kind: "pin", name: "ini.z.max_acceleration", type: "HAL_FLOAT", value: 0, connected: true }),
+});
+
 export const VIRTUAL_HAL_COMMAND_SCRIPT_FIXTURES = Object.freeze([
   Object.freeze({
     id: "pin-signal-net-show",
@@ -1130,6 +1257,11 @@ export const VIRTUAL_HAL_SOURCE_DERIVED_CAPABILITIES = Object.freeze({
     ]),
     evidence: "Bridge snapshots only serialize source-derived virtual HAL pins and values into the LinuxCNC-backed interpreter HAL adapter.",
   }),
+  "controlled-user-m-process-state-boundary": Object.freeze({
+    label: "Controlled user-M process state boundary",
+    sourceFiles: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
+    evidence: "Millturn M128/M129 simulation exposes LinuxCNC source-derived Tcl/HAL state targets while keeping external process execution and promotion locked.",
+  }),
 });
 
 export function createVirtualHalState(overrides = {}) {
@@ -1150,7 +1282,7 @@ export function createVirtualHalState(overrides = {}) {
       mode: "manual",
     },
     pins: Object.fromEntries(VIRTUAL_HAL_AXISUI_PINS.pins.map((pin) => [pin.name, pin.type === "HAL_FLOAT" ? 0 : false])),
-    externalPins: {},
+    externalPins: Object.fromEntries(Object.entries(VIRTUAL_HAL_DEFAULT_MILLTURN_USER_M_EXTERNAL_PINS).map(([name, entry]) => [name, { ...entry }])),
     position: Object.fromEntries(VIRTUAL_HAL_AXES.map((axis) => [axis, 0])),
     homed: Object.fromEntries(VIRTUAL_HAL_AXES.map((axis) => [axis, false])),
     limits: Object.fromEntries(VIRTUAL_HAL_AXES.map((axis) => [
@@ -2210,6 +2342,12 @@ export function createVirtualHalBridgeReadiness(options = {}) {
     "halui.estop.is-activated",
     "spindle.0.speed-out",
     "iocontrol.0.coolant-flood",
+    "motion.switchkins-type",
+    "motion.analog-out-03",
+    "kinstype.is-0",
+    "kinstype.is-1",
+    "ini.x.min_limit",
+    "ini.z.max_limit",
   ];
   const snapshotPins = new Set((snapshot.values ?? []).map(({ name }) => name));
   const missingPins = requiredPins.filter((name) => !snapshotPins.has(name));
@@ -2337,6 +2475,7 @@ export function createVirtualHalProjectReport(options = {}) {
     registry: pinRegistry,
     systemCoverage,
   });
+  const userMProcessBoundary = createVirtualHalMillturnUserMProcessBoundaryReport(options);
   return {
     apiName: "linuxcnc-wasm-virtual-hal-project-report",
     reportVersion: 1,
@@ -2353,6 +2492,7 @@ export function createVirtualHalProjectReport(options = {}) {
     integrity,
     systemCoverage,
     simulationRuntime: createVirtualHalSimulationRuntimeReport(state),
+    userMProcessBoundary,
     wasmBridgeSnapshot: snapshot,
     bridgeReadiness: readiness,
     bridgeActionPlan: actionPlan,
@@ -2387,6 +2527,11 @@ export function createVirtualHalProjectReport(options = {}) {
         label: "Simulation HAL runtime",
         value: "ready",
       },
+      {
+        id: "user-m-process-boundary",
+        label: "User-M process boundary",
+        value: userMProcessBoundary.phase,
+      },
     ],
   };
 }
@@ -3407,6 +3552,177 @@ export function createVirtualHalSimConfigMacroLoadFixtureReport(options = {}) {
   };
 }
 
+function virtualHalMillturnUserMCaseForCode(code) {
+  const normalized = String(code ?? "").trim().toUpperCase();
+  return VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.cases
+    .find((entry) => entry.userMCode === normalized || entry.remapCode === normalized) ?? null;
+}
+
+function createMillturnUserMStateTargetRows(boundaryCase) {
+  return boundaryCase.stateTargets.map((target) => ({
+    path: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.path,
+    ini: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.ini,
+    blocked: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.boundaryClass,
+    userMCode: boundaryCase.userMCode,
+    targetPin: target.pin,
+    sourceSection: target.sourceSection,
+    sourceField: target.sourceField,
+    expectedValue: target.value,
+    executionEnabled: false,
+    promotionAllowed: false,
+    proofStatus: "pending_native_runtime_probe",
+    notes: "source_derived_virtual_hal_state_target_no_external_process_execution",
+  }));
+}
+
+export function createVirtualHalMillturnUserMProcessBoundaryReport(options = {}) {
+  const boundary = VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY;
+  const manifestProvided = typeof options.manifestText === "string" || Array.isArray(options.manifestEntries);
+  const manifestSet = new Set([
+    ...sourceManifestSetFromText(options.manifestText ?? ""),
+    ...(options.manifestEntries ?? []).map(normalizeLinuxCncSourcePath),
+  ]);
+  const sourceFiles = [...boundary.sourceFiles];
+  const manifestSourceFiles = [...boundary.manifestSourceFiles];
+  const missingManifestFiles = manifestProvided
+    ? manifestSourceFiles.filter((file) => !manifestSet.has(normalizeLinuxCncSourcePath(file)))
+    : [];
+  const rows = boundary.cases.map((entry) => {
+    const stateTargetRows = createMillturnUserMStateTargetRows(entry);
+    return {
+      path: boundary.path,
+      ini: boundary.ini,
+      blocked: boundary.boundaryClass,
+      remapCode: entry.remapCode,
+      userMCode: entry.userMCode,
+      stateMode: entry.stateMode,
+      guardPin: entry.guardPin,
+      switchkinsOutputPin: entry.switchkinsOutputPin,
+      switchkinsTarget: entry.switchkinsTarget,
+      activeG5x: entry.activeG5x,
+      workOffsetPocket: entry.workOffsetPocket,
+      workOffsetWords: entry.workOffsetWords,
+      requiredRuntime: boundary.requiredRuntime,
+      expectedStatePins: stateTargetRows.map((row) => row.targetPin),
+      expectedStateValues: stateTargetRows.map((row) => `${row.targetPin}=${row.expectedValue}`),
+      stateTargetCount: stateTargetRows.length,
+      stateTargetRows,
+      sourceFiles,
+      manifestSourceFiles,
+      sourceDerived: sourceFiles.length > 0,
+      executionEnabled: false,
+      promotionAllowed: false,
+      proofStatus: "pending_native_runtime_probe",
+      nativeProbe: boundary.nativeProbe,
+      complete: sourceFiles.length > 0 && missingManifestFiles.length === 0,
+      notes: "controlled_virtual_hal_state_boundary_keep_user_m_process_blocked",
+    };
+  });
+  const complete = rows.length > 0 &&
+    rows.every((row) => row.complete) &&
+    missingManifestFiles.length === 0;
+  return {
+    apiName: "linuxcnc-wasm-virtual-hal-millturn-user-m-process-boundary-report",
+    reportVersion: 1,
+    source: "linuxcnc-configs-sim-source-derived-user-m-process-boundary",
+    phase: complete ? "simulation-boundary-ready" : "blocked",
+    complete,
+    webSimulationSatisfied: complete,
+    boundaryClass: boundary.boundaryClass,
+    path: boundary.path,
+    ini: boundary.ini,
+    requiredRuntime: boundary.requiredRuntime,
+    nativeProbe: boundary.nativeProbe,
+    nativeRuntimeRequired: true,
+    processExecutionReady: false,
+    executionEnabled: false,
+    promotionAllowed: false,
+    inventoryBaselineUnchanged: true,
+    jsCncSemantics: false,
+    manifestChecked: manifestProvided,
+    missingManifestFiles,
+    sourceFiles,
+    manifestSourceFiles,
+    caseCount: rows.length,
+    stateTargetCount: rows.reduce((sum, row) => sum + row.stateTargetCount, 0),
+    rows,
+    summaryRows: [
+      { id: "boundary", label: "User-M boundary", value: boundary.boundaryClass },
+      { id: "cases", label: "M-code cases", value: rows.map((row) => `${row.remapCode}->${row.userMCode}`).join(", ") },
+      { id: "state-targets", label: "HAL state targets", value: `${rows.reduce((sum, row) => sum + row.stateTargetCount, 0)}` },
+      { id: "execution", label: "External process execution", value: "locked" },
+      { id: "promotion", label: "Promotion allowed", value: "0" },
+    ],
+  };
+}
+
+export function applyVirtualHalMillturnUserMProcessState(halState = createVirtualHalState(), codeOrOptions = "M128", options = {}) {
+  const code = typeof codeOrOptions === "object" && codeOrOptions !== null
+    ? codeOrOptions.code ?? codeOrOptions.userMCode ?? codeOrOptions.remapCode
+    : codeOrOptions;
+  const boundaryCase = virtualHalMillturnUserMCaseForCode(code);
+  if (!boundaryCase) {
+    throw new Error(`unknown millturn user-M process code: ${code}`);
+  }
+  const report = createVirtualHalMillturnUserMProcessBoundaryReport(options);
+  const row = report.rows.find((entry) => entry.userMCode === boundaryCase.userMCode);
+  if (!row?.complete) {
+    throw new Error(`millturn user-M process boundary is not source-complete for ${boundaryCase.userMCode}`);
+  }
+
+  const guardUpdates = VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.cases.map((entry) => ({
+    name: entry.guardPin,
+    type: "HAL_BIT",
+    value: entry.userMCode === boundaryCase.userMCode ? 1 : 0,
+  }));
+  const updates = [
+    { name: "motion.switchkins-type", type: "HAL_FLOAT", value: boundaryCase.switchkinsTarget },
+    { name: boundaryCase.switchkinsOutputPin, type: "HAL_FLOAT", value: boundaryCase.switchkinsTarget },
+    ...guardUpdates,
+    ...boundaryCase.stateTargets.map((target) => ({
+      name: target.pin,
+      type: "HAL_FLOAT",
+      value: target.value,
+    })),
+  ];
+  const next = applyVirtualHalPinUpdates(halState, updates, { allowExternal: true });
+  next.hal.commandLog = [
+    ...(next.hal.commandLog ?? []),
+    {
+      source: "virtual-user-m-process-boundary",
+      action: "millturn-user-m-state",
+      userMCode: boundaryCase.userMCode,
+      remapCode: boundaryCase.remapCode,
+      stateMode: boundaryCase.stateMode,
+      executionEnabled: false,
+      promotionAllowed: false,
+      ok: true,
+    },
+  ].slice(-200);
+  next.revision += 1;
+  return {
+    apiName: "linuxcnc-wasm-virtual-hal-millturn-user-m-process-state-result",
+    resultVersion: 1,
+    source: "linuxcnc-configs-sim-source-derived-user-m-process-state",
+    ok: true,
+    boundaryClass: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.boundaryClass,
+    path: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.path,
+    ini: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.ini,
+    userMCode: boundaryCase.userMCode,
+    remapCode: boundaryCase.remapCode,
+    stateMode: boundaryCase.stateMode,
+    switchkinsTarget: boundaryCase.switchkinsTarget,
+    activeG5x: boundaryCase.activeG5x,
+    workOffsetPocket: boundaryCase.workOffsetPocket,
+    appliedPins: updates.map((update) => update.name),
+    executionEnabled: false,
+    promotionAllowed: false,
+    processExecutionReady: false,
+    state: normalizeVirtualHalState(next),
+    report,
+  };
+}
+
 export function createVirtualHalSourceComplianceReport(options = {}) {
   const halState = options.halState ?? createVirtualHalState();
   const snapshot = options.snapshot ?? createVirtualHalWasmBridgeSnapshot(halState);
@@ -3422,6 +3738,7 @@ export function createVirtualHalSourceComplianceReport(options = {}) {
     ...VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS.flatMap((target) => target.sourceFiles),
     ...VIRTUAL_HAL_COMMAND_SCRIPT_FIXTURES.flatMap((fixture) => fixture.sourceFiles),
     ...VIRTUAL_HAL_MOTION_CONTROLLER_MATRIX_FIXTURES.flatMap((fixture) => fixture.sourceFiles),
+    ...VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
     ...(options.allowedSourceFiles ?? []),
   ]);
   const requiredCapabilities = options.requiredCapabilities ?? VIRTUAL_HAL_SIMULATION_RUNTIME_CAPABILITIES;
@@ -3629,6 +3946,14 @@ export function createLinuxCncVirtualHalRuntime(initialState = createVirtualHalS
     getSimConfigMacroLoadFixtureReport(options = {}) {
       return createVirtualHalSimConfigMacroLoadFixtureReport(options);
     },
+    getMillturnUserMProcessBoundaryReport(options = {}) {
+      return createVirtualHalMillturnUserMProcessBoundaryReport(options);
+    },
+    applyMillturnUserMProcessState(codeOrOptions = "M128", options = {}) {
+      const result = applyVirtualHalMillturnUserMProcessState(state, codeOrOptions, options);
+      state = result.state;
+      return result;
+    },
     getCommandScriptFixtureReport(options = {}) {
       return createVirtualHalCommandScriptFixtureReport({ ...options, halState: state });
     },
@@ -3826,6 +4151,9 @@ function isVirtualHalPinWritable(name) {
   if (/^(axis|joint)\./.test(name) || name.startsWith("spindle.")) {
     return true;
   }
+  if (name.startsWith("ini.") || name.startsWith("kinstype.")) {
+    return true;
+  }
   return false;
 }
 
@@ -4014,6 +4342,9 @@ function applyAxisPinWrite(state, name, numeric, enabled) {
 }
 
 function classifyVirtualHalPinGroup(name) {
+  if (name.startsWith("ini.") || name.startsWith("kinstype.") || name === "motion.analog-out-03") {
+    return "user-m-process";
+  }
   if (name.startsWith("axisui.") || name.startsWith("jog.") || name.startsWith("notifications-") || name === "error" || name === "abort") {
     return "axisui";
   }
diff --git a/wasm-port/runtime/sdk/src/project-release-readiness.js b/wasm-port/runtime/sdk/src/project-release-readiness.js
index f54a4f6..795907f 100644
--- a/wasm-port/runtime/sdk/src/project-release-readiness.js
+++ b/wasm-port/runtime/sdk/src/project-release-readiness.js
@@ -702,6 +702,38 @@ function isVirtualHalPromotionCandidateSummaryReady(summary) {
     arrayOrEmpty(summaryObject.blockedCandidateIds).length === 0;
 }
 
+function isVirtualHalMillturnUserMProcessBoundaryReady(report) {
+  const reportObject = objectOrEmpty(report);
+  const rows = arrayOrEmpty(reportObject.rows);
+  return reportObject.apiName === "linuxcnc-wasm-virtual-hal-millturn-user-m-process-boundary-report" &&
+    reportObject.complete === true &&
+    reportObject.webSimulationSatisfied === true &&
+    reportObject.boundaryClass === "L4-USER-M-PROCESS" &&
+    reportObject.path === "axis/vismach/millturn/example.ngc" &&
+    reportObject.executionEnabled === false &&
+    reportObject.promotionAllowed === false &&
+    reportObject.processExecutionReady === false &&
+    reportObject.stateTargetCount === 24 &&
+    arrayOrEmpty(reportObject.sourceFiles).includes("linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128") &&
+    arrayOrEmpty(reportObject.sourceFiles).includes("linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M129") &&
+    rows.some((row) =>
+      row.userMCode === "M128" &&
+      row.remapCode === "M428" &&
+      row.stateMode === "mill" &&
+      row.stateTargetCount === 12 &&
+      row.executionEnabled === false &&
+      row.promotionAllowed === false
+    ) &&
+    rows.some((row) =>
+      row.userMCode === "M129" &&
+      row.remapCode === "M429" &&
+      row.stateMode === "turn" &&
+      row.stateTargetCount === 12 &&
+      row.executionEnabled === false &&
+      row.promotionAllowed === false
+    );
+}
+
 export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifact = {}) {
   const artifactObject = objectOrEmpty(artifact);
   const sourceCompliance = objectOrEmpty(artifactObject.virtualHalSourceCompliance);
@@ -712,6 +744,7 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
   const evidenceExpansion = objectOrEmpty(artifactObject.virtualHalSimConfigEvidenceExpansion);
   const promotionCandidateSummary = objectOrEmpty(artifactObject.virtualHalPromotionCandidateSummary);
   const macroLoadFixtures = objectOrEmpty(artifactObject.virtualHalSimConfigMacroLoadFixtures);
+  const millturnUserMProcessBoundary = objectOrEmpty(artifactObject.virtualHalMillturnUserMProcessBoundary);
   const sessionDiagnostics = objectOrEmpty(artifactObject.virtualHalSessionDiagnostics);
   const replacement = objectOrEmpty(artifactObject.virtualHalSimulationReplacement);
   const virtualHal = objectOrEmpty(artifactObject.virtualHal);
@@ -737,6 +770,9 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
   const hasMacroLoadFixtures = artifactObject.virtualHalSimConfigMacroLoadFixtures !== undefined;
   const macroLoadFixturesReady = hasMacroLoadFixtures &&
     isVirtualHalSimConfigMacroLoadFixtureReportReady(macroLoadFixtures);
+  const hasMillturnUserMProcessBoundary = artifactObject.virtualHalMillturnUserMProcessBoundary !== undefined;
+  const millturnUserMProcessBoundaryReady = hasMillturnUserMProcessBoundary &&
+    isVirtualHalMillturnUserMProcessBoundaryReady(millturnUserMProcessBoundary);
   const replacementReady = replacement.ready === true &&
     replacement.replacesHostRuntimeForSimulation === true &&
     objectOrEmpty(replacement.sourceCompliance).webSimulationSatisfied === true &&
@@ -750,6 +786,9 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
     objectOrEmpty(sessionDiagnostics.validation).ready === true &&
     objectOrEmpty(sessionDiagnostics.diagnosticsArtifact).apiName === "real-browser-simulation-diagnostics-artifact" &&
     objectOrEmpty(sessionDiagnostics.diagnosticsArtifact?.virtualHalSourceCompliance).complete === true &&
+    isVirtualHalMillturnUserMProcessBoundaryReady(
+      objectOrEmpty(sessionDiagnostics.diagnosticsArtifact?.virtualHalMillturnUserMProcessBoundary),
+    ) &&
     objectOrEmpty(sessionDiagnostics.diagnosticsArtifact?.virtualHalMotionControllerMatrix).manifestChecked === true
   );
   const missing = [
@@ -762,6 +801,7 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
     ...(evidenceExpansionReady ? [] : ["virtualHalSimConfigEvidenceExpansion"]),
     ...(promotionCandidateSummaryReady ? [] : ["virtualHalPromotionCandidateSummary"]),
     ...(macroLoadFixturesReady ? [] : ["virtualHalSimConfigMacroLoadFixtures"]),
+    ...(millturnUserMProcessBoundaryReady ? [] : ["virtualHalMillturnUserMProcessBoundary"]),
     ...(commandScriptFixturesReady ? [] : ["virtualHalCommandScriptFixtures"]),
     ...(motionControllerMatrixReady ? [] : ["virtualHalMotionControllerMatrix"]),
     ...(sessionDiagnosticsReady ? [] : ["virtualHalSessionDiagnostics"]),
@@ -785,6 +825,8 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
     hasPromotionCandidateSummary,
     macroLoadFixturesReady,
     hasMacroLoadFixtures,
+    millturnUserMProcessBoundaryReady,
+    hasMillturnUserMProcessBoundary,
     commandScriptFixturesReady,
     motionControllerMatrixReady,
     sessionDiagnosticsReady,
@@ -795,6 +837,7 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
       ...arrayOrEmpty(promotionCandidates.sourceFiles),
       ...arrayOrEmpty(evidenceExpansion.sourceFiles),
       ...arrayOrEmpty(macroLoadFixtures.sourceFiles),
+      ...arrayOrEmpty(millturnUserMProcessBoundary.sourceFiles),
       ...arrayOrEmpty(commandScriptFixtures.sourceFiles),
       ...arrayOrEmpty(motionControllerMatrix.sourceFiles),
       ...arrayOrEmpty(motionControllerMatrix.simConfigSourceFiles),
@@ -840,6 +883,11 @@ export function createProjectReleaseBrowserDiagnosticsArtifactValidation(artifac
         label: "Virtual HAL sim-config macro/load fixtures",
         value: hasMacroLoadFixtures ? (macroLoadFixturesReady ? "ready" : "missing") : "not provided",
       },
+      {
+        id: "millturn-user-m-process-boundary",
+        label: "Millturn user-M process boundary",
+        value: hasMillturnUserMProcessBoundary ? (millturnUserMProcessBoundaryReady ? "ready" : "missing") : "not provided",
+      },
       {
         id: "command-script-fixtures",
         label: "Virtual HAL command script fixtures",
diff --git a/wasm-port/runtime/ui/simulation/index.html b/wasm-port/runtime/ui/simulation/index.html
index 98fd681..1d36fdb 100644
--- a/wasm-port/runtime/ui/simulation/index.html
+++ b/wasm-port/runtime/ui/simulation/index.html
@@ -1732,6 +1732,12 @@ M2
               <dd><span data-python-remap-runtime="mode">contract-only</span> | callable <span data-python-remap-runtime="callable">locked</span> | generator <span data-python-remap-runtime="generator">locked</span> | state <span data-python-remap-runtime="interpreter">locked</span></dd>
               <dt>Python Promotion</dt>
               <dd>execution <span data-python-remap-runtime="execution">disabled</span> | promotion <span data-python-remap-runtime="promotion">locked</span></dd>
+              <dt>User-M Process</dt>
+              <dd><span data-user-m-process="boundary">L4-USER-M-PROCESS</span> | <span data-user-m-process="path">axis/vismach/millturn/example.ngc</span> | <span data-user-m-process="phase">ready</span></dd>
+              <dt>Millturn Mode</dt>
+              <dd><span data-user-m-process="active-code">none</span> | remap <span data-user-m-process="active-remap">none</span> | mode <span data-user-m-process="active-mode">none</span> | switchkins <span data-user-m-process="switchkins">none</span></dd>
+              <dt>User-M Promotion</dt>
+              <dd>execution <span data-user-m-process="execution">disabled</span> | promotion <span data-user-m-process="promotion">locked</span></dd>
               <dt>Limits/Home</dt>
               <dd data-limits-home-summary>source unavailable | X home no limit off/off fault none</dd>
               <dt>Overrides</dt>
@@ -1851,7 +1857,9 @@ M2
       VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_FIXTURES as SHARED_VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_FIXTURES,
       VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES as SHARED_VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES,
       VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS as SHARED_VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS,
+      VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY as SHARED_VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY,
       applyVirtualHalAction as applySharedVirtualHalAction,
+      applyVirtualHalMillturnUserMProcessState as applySharedVirtualHalMillturnUserMProcessState,
       applyVirtualHalPinUpdates as applySharedVirtualHalPinUpdates,
       cloneVirtualHalState as cloneSharedVirtualHalState,
       createVirtualHalCommandScriptFixtureReport as createSharedVirtualHalCommandScriptFixtureReport,
@@ -1859,6 +1867,7 @@ M2
       createVirtualHalIntegrityReport as createSharedVirtualHalIntegrityReport,
       createVirtualHalLimitsHomeState as createSharedVirtualHalLimitsHomeState,
       createVirtualHalMachineStatusState as createSharedVirtualHalMachineStatusState,
+      createVirtualHalMillturnUserMProcessBoundaryReport as createSharedVirtualHalMillturnUserMProcessBoundaryReport,
       createVirtualHalMotionControllerMatrixReport as createSharedVirtualHalMotionControllerMatrixReport,
       createVirtualHalPinRegistry as createSharedVirtualHalPinRegistry,
       createVirtualHalSimConfigEvidenceExpansionReport as createSharedVirtualHalSimConfigEvidenceExpansionReport,
@@ -2036,7 +2045,22 @@ M2
     const VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES = SHARED_VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES;
     const VIRTUAL_HAL_SIM_CONFIG_EVIDENCE_EXPANSION_CANDIDATES = SHARED_VIRTUAL_HAL_SIM_CONFIG_EVIDENCE_EXPANSION_CANDIDATES;
     const VIRTUAL_HAL_MOTION_MATRIX_MANIFEST_ENTRIES = SHARED_VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS.flatMap((target) => target.sourceFiles ?? []);
+    const VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY = SHARED_VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY;
     let virtualHalState = createVirtualHalState();
+    let millturnUserMProcessState = {
+      apiName: "real-browser-simulation-millturn-user-m-process-state",
+      stateVersion: 1,
+      phase: "ready",
+      boundaryClass: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.boundaryClass,
+      path: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.path,
+      activeUserMCode: "none",
+      activeRemapCode: "none",
+      activeMode: "none",
+      switchkinsTarget: "none",
+      executionEnabled: false,
+      promotionAllowed: false,
+      processExecutionReady: false,
+    };
 
     function setAllText(selector, value) {
       document.querySelectorAll(selector).forEach((node) => {
@@ -2562,6 +2586,67 @@ M2
       return createSharedVirtualHalSimulationReplacementReport(virtualHalState);
     }
 
+    function createVirtualHalMillturnUserMProcessBoundaryReport() {
+      return createSharedVirtualHalMillturnUserMProcessBoundaryReport({
+        manifestEntries: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
+      });
+    }
+
+    function renderMillturnUserMProcessState(state = millturnUserMProcessState) {
+      const nextState = {
+        apiName: "real-browser-simulation-millturn-user-m-process-state",
+        stateVersion: 1,
+        phase: state.phase ?? "ready",
+        boundaryClass: state.boundaryClass ?? VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.boundaryClass,
+        path: state.path ?? VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.path,
+        activeUserMCode: state.activeUserMCode ?? "none",
+        activeRemapCode: state.activeRemapCode ?? "none",
+        activeMode: state.activeMode ?? "none",
+        switchkinsTarget: state.switchkinsTarget ?? "none",
+        executionEnabled: state.executionEnabled === true,
+        promotionAllowed: state.promotionAllowed === true,
+        processExecutionReady: state.processExecutionReady === true,
+      };
+      millturnUserMProcessState = nextState;
+      document.body.dataset.userMProcessPhase = nextState.phase;
+      document.body.dataset.userMProcessActiveCode = nextState.activeUserMCode;
+      document.body.dataset.userMProcessActiveMode = nextState.activeMode;
+      setAllText("[data-user-m-process=\"boundary\"]", nextState.boundaryClass);
+      setAllText("[data-user-m-process=\"path\"]", nextState.path);
+      setAllText("[data-user-m-process=\"phase\"]", nextState.phase);
+      setAllText("[data-user-m-process=\"active-code\"]", nextState.activeUserMCode);
+      setAllText("[data-user-m-process=\"active-remap\"]", nextState.activeRemapCode);
+      setAllText("[data-user-m-process=\"active-mode\"]", nextState.activeMode);
+      setAllText("[data-user-m-process=\"switchkins\"]", String(nextState.switchkinsTarget));
+      setAllText("[data-user-m-process=\"execution\"]", nextState.executionEnabled ? "enabled" : "disabled");
+      setAllText("[data-user-m-process=\"promotion\"]", nextState.promotionAllowed ? "allowed" : "locked");
+      return { ...nextState };
+    }
+
+    function applyMillturnUserMProcessState(codeOrOptions = "M128", options = {}) {
+      const result = applySharedVirtualHalMillturnUserMProcessState(virtualHalState, codeOrOptions, {
+        manifestEntries: VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
+        ...options,
+      });
+      virtualHalState = result.state;
+      renderVirtualHalState();
+      renderMillturnUserMProcessState({
+        phase: "applied",
+        boundaryClass: result.boundaryClass,
+        path: result.path,
+        activeUserMCode: result.userMCode,
+        activeRemapCode: result.remapCode,
+        activeMode: result.stateMode,
+        switchkinsTarget: result.switchkinsTarget,
+        executionEnabled: result.executionEnabled,
+        promotionAllowed: result.promotionAllowed,
+        processExecutionReady: result.processExecutionReady,
+      });
+      pushStatusHistory("user-m-process", `${result.remapCode}->${result.userMCode} ${result.stateMode}`);
+      renderAxisStatusbar();
+      return result;
+    }
+
     function createVirtualHalSourceComplianceReport() {
       return createSharedVirtualHalSourceComplianceReport({ halState: virtualHalState });
     }
@@ -2741,6 +2826,7 @@ M2
         renderVirtualHalDro();
       }
       renderLimitsHomeState(createVirtualHalLimitsHomeState());
+      renderMillturnUserMProcessState();
       const promotionCandidateReport = createVirtualHalSimConfigPromotionCandidateReport();
       renderPromotionFamilyRows(promotionCandidateReport);
       renderPromotionCandidateSummary(createVirtualHalPromotionCandidateSummary(promotionCandidateReport));
@@ -2793,6 +2879,8 @@ M2
         virtualHal: cloneVirtualHalState(),
         virtualHalSimulationReplacement: createVirtualHalSimulationReplacementReport(),
         virtualHalSourceCompliance: createVirtualHalSourceComplianceReport(),
+        virtualHalMillturnUserMProcessBoundary: createVirtualHalMillturnUserMProcessBoundaryReport(),
+        virtualHalMillturnUserMProcessState: renderMillturnUserMProcessState(),
         virtualHalSimConfigSourceCoverage: createVirtualHalSimConfigSourceCoverageReport(),
         virtualHalSimConfigPromotionCandidates: createVirtualHalSimConfigPromotionCandidateReport(),
         virtualHalSimConfigEvidenceExpansion: createVirtualHalSimConfigEvidenceExpansionReport(),
@@ -2833,6 +2921,7 @@ M2
         virtualHal: virtualHal.state,
         virtualHalSimulationReplacement: virtualHal.diagnostics,
         virtualHalSourceCompliance: virtualHal.sourceCompliance,
+        virtualHalMillturnUserMProcessBoundary: virtualHal.millturnUserMProcessBoundary,
         virtualHalSimConfigSourceCoverage: virtualHal.simConfigSourceCoverage,
         virtualHalSimConfigPromotionCandidates: virtualHal.simConfigPromotionCandidates,
         virtualHalSimConfigEvidenceExpansion: virtualHal.simConfigEvidenceExpansion,
@@ -3773,6 +3862,7 @@ M2
           ...VIRTUAL_HAL_SIM_CONFIG_PROMOTION_CANDIDATES.flatMap((candidate) => candidate.sourceFiles ?? []),
           ...VIRTUAL_HAL_SIM_CONFIG_EVIDENCE_EXPANSION_CANDIDATES.flatMap((candidate) => candidate.sourceFiles ?? []),
           ...VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_FIXTURES.flatMap((fixture) => fixture.sourceFiles ?? []),
+          ...VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.sourceFiles,
         ],
       });
       const payload = createMachineSessionSnapshotPayload(session.machineId, {
@@ -4236,6 +4326,9 @@ M2
         stepVirtualHalMotionController: (options = {}) => stepVirtualHalMotionController(options),
         getVirtualHalSimulationRuntimeReport: () => createVirtualHalSimulationRuntimeReport(),
         getVirtualHalSimulationReplacementReport: () => createVirtualHalSimulationReplacementReport(),
+        getVirtualHalMillturnUserMProcessBoundaryReport: () => createVirtualHalMillturnUserMProcessBoundaryReport(),
+        getMillturnUserMProcessState: () => renderMillturnUserMProcessState(),
+        applyMillturnUserMProcessState: (codeOrOptions = "M128", options = {}) => applyMillturnUserMProcessState(codeOrOptions, options),
         getVirtualHalSourceComplianceReport: () => createVirtualHalSourceComplianceReport(),
         getVirtualHalSimConfigSourceCoverageReport: () => createVirtualHalSimConfigSourceCoverageReport(),
         getVirtualHalSimConfigPromotionCandidateReport: () => createVirtualHalSimConfigPromotionCandidateReport(),
diff --git a/wasm-port/runtime/ui/simulation/simulation-app.js b/wasm-port/runtime/ui/simulation/simulation-app.js
index afcb44b..ad78e12 100644
--- a/wasm-port/runtime/ui/simulation/simulation-app.js
+++ b/wasm-port/runtime/ui/simulation/simulation-app.js
@@ -22,6 +22,7 @@ export {
 export {
   VIRTUAL_HAL_AXES,
   VIRTUAL_HAL_AXISUI_PINS,
+  VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY,
   VIRTUAL_HAL_MOTION_CONTROLLER_MATRIX_FIXTURES,
   VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_AUDIT_CANDIDATES,
   VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_BLOCKED_FIXTURES,
@@ -32,6 +33,7 @@ export {
   VIRTUAL_HAL_SIMULATION_REPLACEMENT_TARGETS,
   VIRTUAL_HAL_SIMULATION_RUNTIME_CAPABILITIES,
   applyVirtualHalAction,
+  applyVirtualHalMillturnUserMProcessState,
   applyVirtualHalPinUpdates,
   cloneVirtualHalState,
   createLinuxCncVirtualHalRuntime,
@@ -41,6 +43,7 @@ export {
   createVirtualHalIntegrityReport,
   createVirtualHalLimitsHomeState,
   createVirtualHalMachineStatusState,
+  createVirtualHalMillturnUserMProcessBoundaryReport,
   createVirtualHalPinRegistry,
   createVirtualHalSimConfigEvidenceExpansionReport,
   createVirtualHalSimConfigMacroLoadFixtureReport,
diff --git a/wasm-port/tests/browser/ini_panel_workflow_overview_smoke.html b/wasm-port/tests/browser/ini_panel_workflow_overview_smoke.html
index 052c5ce..e9a5923 100644
--- a/wasm-port/tests/browser/ini_panel_workflow_overview_smoke.html
+++ b/wasm-port/tests/browser/ini_panel_workflow_overview_smoke.html
@@ -10,6 +10,7 @@
     import {
       VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS,
       createVirtualHalCommandScriptFixtureReport,
+      createVirtualHalMillturnUserMProcessBoundaryReport,
       createVirtualHalMotionControllerMatrixReport,
       createVirtualHalSimConfigMacroLoadFixtureReport,
       createVirtualHalSimConfigEvidenceExpansionReport,
@@ -433,6 +434,16 @@
             "linuxcnc/configs/sim/axis/external_offsets/eoffsets.ngc",
           ],
         }),
+        virtualHalMillturnUserMProcessBoundary: createVirtualHalMillturnUserMProcessBoundaryReport({
+          manifestEntries: [
+            "linuxcnc/configs/sim/axis/vismach/millturn/millturn.ini",
+            "linuxcnc/configs/sim/axis/vismach/millturn/example.ngc",
+            "linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128",
+            "linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M129",
+            "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/428remap.ngc",
+            "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/429remap.ngc",
+          ],
+        }),
         virtualHalCommandScriptFixtures: createVirtualHalCommandScriptFixtureReport({ halState: diagnosticsVirtualHalState }),
         virtualHalMotionControllerMatrix: diagnosticsMotionControllerMatrix,
       };
diff --git a/wasm-port/tests/browser/real_simulation_page_smoke.html b/wasm-port/tests/browser/real_simulation_page_smoke.html
index 1a06ce3..b76b208 100644
--- a/wasm-port/tests/browser/real_simulation_page_smoke.html
+++ b/wasm-port/tests/browser/real_simulation_page_smoke.html
@@ -241,6 +241,9 @@
         !api?.stepVirtualHalMotionController ||
         !api?.getVirtualHalSimulationRuntimeReport ||
         !api?.getVirtualHalSimulationReplacementReport ||
+        !api?.getVirtualHalMillturnUserMProcessBoundaryReport ||
+        !api?.getMillturnUserMProcessState ||
+        !api?.applyMillturnUserMProcessState ||
         !api?.getVirtualHalSourceComplianceReport ||
         !api?.getVirtualHalSimConfigSourceCoverageReport ||
         !api?.getVirtualHalSimConfigPromotionCandidateReport ||
@@ -442,7 +445,66 @@
       ) {
         throw new Error(`simulation virtual HAL registry/integrity drift: ${JSON.stringify(initialVirtualHalRegistry)}`);
       }
-      const diagnosticsArtifact = api.exportDiagnosticsArtifact();
+      let diagnosticsArtifact = api.exportDiagnosticsArtifact();
+      const millturnUserMBoundary = api.getVirtualHalMillturnUserMProcessBoundaryReport();
+      if (
+        millturnUserMBoundary.apiName !== "linuxcnc-wasm-virtual-hal-millturn-user-m-process-boundary-report" ||
+        millturnUserMBoundary.boundaryClass !== "L4-USER-M-PROCESS" ||
+        millturnUserMBoundary.complete !== true ||
+        millturnUserMBoundary.webSimulationSatisfied !== true ||
+        millturnUserMBoundary.executionEnabled !== false ||
+        millturnUserMBoundary.promotionAllowed !== false ||
+        millturnUserMBoundary.processExecutionReady !== false ||
+        millturnUserMBoundary.rows.length !== 2 ||
+        !millturnUserMBoundary.rows.some(({ userMCode, remapCode, stateTargetCount }) => userMCode === "M128" && remapCode === "M428" && stateTargetCount === 12) ||
+        !millturnUserMBoundary.rows.some(({ userMCode, remapCode, stateTargetCount }) => userMCode === "M129" && remapCode === "M429" && stateTargetCount === 12) ||
+        doc.body.dataset.userMProcessPhase !== "ready" ||
+        doc.querySelector('[data-user-m-process="boundary"]')?.textContent !== "L4-USER-M-PROCESS" ||
+        doc.querySelector('[data-user-m-process="path"]')?.textContent !== "axis/vismach/millturn/example.ngc" ||
+        doc.querySelector('[data-user-m-process="execution"]')?.textContent !== "disabled" ||
+        doc.querySelector('[data-user-m-process="promotion"]')?.textContent !== "locked"
+      ) {
+        throw new Error(`simulation millturn user-M boundary drift: ${JSON.stringify(millturnUserMBoundary)}`);
+      }
+      const millturnM128 = api.applyMillturnUserMProcessState("M128");
+      if (
+        millturnM128.apiName !== "linuxcnc-wasm-virtual-hal-millturn-user-m-process-state-result" ||
+        millturnM128.userMCode !== "M128" ||
+        millturnM128.remapCode !== "M428" ||
+        millturnM128.stateMode !== "mill" ||
+        api.readVirtualHalPin("motion.switchkins-type")?.value !== 0 ||
+        api.readVirtualHalPin("ini.x.min_limit")?.value !== -300 ||
+        api.readVirtualHalPin("ini.z.max_limit")?.value !== 0 ||
+        doc.body.dataset.userMProcessPhase !== "applied" ||
+        doc.body.dataset.userMProcessActiveCode !== "M128" ||
+        doc.body.dataset.userMProcessActiveMode !== "mill" ||
+        doc.querySelector('[data-user-m-process="active-code"]')?.textContent !== "M128" ||
+        doc.querySelector('[data-user-m-process="active-remap"]')?.textContent !== "M428" ||
+        doc.querySelector('[data-user-m-process="active-mode"]')?.textContent !== "mill" ||
+        doc.querySelector('[data-user-m-process="switchkins"]')?.textContent !== "0"
+      ) {
+        throw new Error(`simulation M128 user-M state did not apply: ${JSON.stringify(millturnM128)}`);
+      }
+      const millturnM129 = api.applyMillturnUserMProcessState("M129");
+      if (
+        millturnM129.userMCode !== "M129" ||
+        millturnM129.remapCode !== "M429" ||
+        millturnM129.stateMode !== "turn" ||
+        api.readVirtualHalPin("motion.switchkins-type")?.value !== 1 ||
+        api.readVirtualHalPin("motion.analog-out-03")?.value !== 1 ||
+        api.readVirtualHalPin("kinstype.is-0")?.value !== 0 ||
+        api.readVirtualHalPin("kinstype.is-1")?.value !== 1 ||
+        api.readVirtualHalPin("ini.x.max_limit")?.value !== 0 ||
+        api.readVirtualHalPin("ini.z.max_limit")?.value !== 300 ||
+        api.getMillturnUserMProcessState().activeMode !== "turn" ||
+        doc.querySelector('[data-user-m-process="active-code"]')?.textContent !== "M129" ||
+        doc.querySelector('[data-user-m-process="active-remap"]')?.textContent !== "M429" ||
+        doc.querySelector('[data-user-m-process="active-mode"]')?.textContent !== "turn" ||
+        doc.querySelector('[data-user-m-process="switchkins"]')?.textContent !== "1"
+      ) {
+        throw new Error(`simulation M129 user-M state did not apply: ${JSON.stringify(millturnM129)}`);
+      }
+      diagnosticsArtifact = api.exportDiagnosticsArtifact();
       const promotionCandidateSummary = api.getVirtualHalPromotionCandidateSummary();
       const expectedPromotionCandidates = [
         [
@@ -542,7 +604,14 @@
         diagnosticsArtifact.virtualHalSimulationReplacement?.sourceCompliance?.webSimulationSatisfied !== true ||
         diagnosticsArtifact.virtualHalSourceCompliance?.complete !== true ||
         diagnosticsArtifact.virtualHalSourceCompliance?.webSimulationSatisfied !== true ||
+        !diagnosticsArtifact.virtualHalSourceCompliance?.sourceFiles?.includes("linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128") ||
         !diagnosticsArtifact.virtualHalSourceCompliance?.sourceFiles?.includes("linuxcnc/src/hal/utils/halcmd_commands.cc") ||
+        diagnosticsArtifact.virtualHalMillturnUserMProcessBoundary?.complete !== true ||
+        diagnosticsArtifact.virtualHalMillturnUserMProcessBoundary?.boundaryClass !== "L4-USER-M-PROCESS" ||
+        diagnosticsArtifact.virtualHalMillturnUserMProcessState?.activeUserMCode !== "M129" ||
+        diagnosticsArtifact.virtualHalMillturnUserMProcessState?.activeMode !== "turn" ||
+        diagnosticsArtifact.virtualHalMillturnUserMProcessState?.executionEnabled !== false ||
+        diagnosticsArtifact.virtualHalMillturnUserMProcessState?.promotionAllowed !== false ||
         diagnosticsArtifact.virtualHalSimConfigSourceCoverage?.complete !== true ||
         !diagnosticsArtifact.virtualHalSimConfigSourceCoverage?.sourceFiles?.includes("linuxcnc/configs/sim/axis/foam/axis_foam.ini") ||
         !diagnosticsArtifact.virtualHalSimConfigSourceCoverage?.sourceFiles?.includes("linuxcnc/configs/sim/qtdragon/qtdragon_xyz45/qtdragon_xyza.ini") ||
@@ -976,6 +1045,8 @@
         savedVirtualHalSession.sessionDiagnostics?.ready !== true ||
         savedVirtualHalSession.sessionDiagnostics?.validation?.ready !== true ||
         savedVirtualHalSession.sessionDiagnostics?.validation?.motionControllerMatrixReady !== true ||
+        savedVirtualHalSession.snapshot?.payload?.virtualHal?.millturnUserMProcessBoundary?.complete !== true ||
+        savedVirtualHalSession.sessionDiagnostics?.diagnosticsArtifact?.virtualHalMillturnUserMProcessBoundary?.complete !== true ||
         savedVirtualHalSession.sessionDiagnostics?.diagnosticsArtifact?.virtualHalMotionControllerMatrix?.complete !== true ||
         doc.body.dataset.virtualHalSessionPhase !== "saved" ||
         !doc.querySelector("[data-virtual-hal-session-status]")?.textContent.includes("Saved HAL session")
@@ -991,7 +1062,8 @@
         savedSessionDiagnosticsArtifact.validation?.ready !== true ||
         diagnosticsWithSavedSession.virtualHalSessionDiagnostics?.ready !== true ||
         diagnosticsWithSavedSession.virtualHalSessionDiagnostics?.validation?.ready !== true ||
-        diagnosticsWithSavedSession.virtualHalSessionDiagnostics?.diagnosticsArtifact?.virtualHalSourceCompliance?.complete !== true
+        diagnosticsWithSavedSession.virtualHalSessionDiagnostics?.diagnosticsArtifact?.virtualHalSourceCompliance?.complete !== true ||
+        diagnosticsWithSavedSession.virtualHalSessionDiagnostics?.diagnosticsArtifact?.virtualHalMillturnUserMProcessBoundary?.complete !== true
       ) {
         throw new Error(`AXIS-style virtual HAL session diagnostics did not become release-ready: ${JSON.stringify(diagnosticsWithSavedSession.virtualHalSessionDiagnostics)}`);
       }
diff --git a/wasm-port/tests/sdk/node/verify_project_release_artifact_url_workflow.mjs b/wasm-port/tests/sdk/node/verify_project_release_artifact_url_workflow.mjs
index 2f7e87a..8e8dd6e 100644
--- a/wasm-port/tests/sdk/node/verify_project_release_artifact_url_workflow.mjs
+++ b/wasm-port/tests/sdk/node/verify_project_release_artifact_url_workflow.mjs
@@ -13,6 +13,7 @@ import {
   createVirtualHalSimConfigPromotionCandidateReport,
   createVirtualHalSimConfigMacroLoadFixtureReport,
   createVirtualHalCommandScriptFixtureReport,
+  createVirtualHalMillturnUserMProcessBoundaryReport,
   createVirtualHalMotionControllerMatrixReport,
   createVirtualHalSimConfigEvidenceExpansionReport,
   createVirtualHalSimulationReplacementReport,
@@ -57,6 +58,9 @@ const virtualHalSimConfigEvidenceExpansion = createVirtualHalSimConfigEvidenceEx
 const virtualHalSimConfigMacroLoadFixtures = createVirtualHalSimConfigMacroLoadFixtureReport({
   manifestText: sourceManifestText,
 });
+const virtualHalMillturnUserMProcessBoundary = createVirtualHalMillturnUserMProcessBoundaryReport({
+  manifestText: sourceManifestText,
+});
 const virtualHalState = createVirtualHalState();
 const pythonRemapRuntimeProof = {
   nativeLifecycleReady: true,
@@ -97,6 +101,7 @@ const browserDiagnosticsArtifact = {
     inventoryBaseline: "executed=82 passed=82 skipped=77 unexpected_fail=0",
   },
   virtualHalSimConfigMacroLoadFixtures,
+  virtualHalMillturnUserMProcessBoundary,
   virtualHalCommandScriptFixtures: createVirtualHalCommandScriptFixtureReport({ halState: virtualHalState }),
   virtualHalMotionControllerMatrix,
 };
diff --git a/wasm-port/tests/sdk/node/verify_sdk_surface.mjs b/wasm-port/tests/sdk/node/verify_sdk_surface.mjs
index 61b5fed..e34fe50 100644
--- a/wasm-port/tests/sdk/node/verify_sdk_surface.mjs
+++ b/wasm-port/tests/sdk/node/verify_sdk_surface.mjs
@@ -34,6 +34,7 @@ import {
   createIniPanelShellWorkflowOverviewReleaseReadinessArtifactValidationSummaryViewModel,
   VIRTUAL_HAL_COMMAND_SCRIPT_FIXTURES,
   VIRTUAL_HAL_COVERAGE_STATES,
+  VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY,
   VIRTUAL_HAL_MOTION_CONTROLLER_MATRIX_FIXTURES,
   VIRTUAL_HAL_PROJECT_PIN_GROUPS,
   VIRTUAL_HAL_SIM_CONFIG_MACRO_LOAD_AUDIT_CANDIDATES,
@@ -51,6 +52,7 @@ import {
   VIRTUAL_HAL_SYSTEM_PIN_FAMILIES,
   VIRTUAL_HAL_WASM_BRIDGE_FUNCTIONS,
   applyVirtualHalAction,
+  applyVirtualHalMillturnUserMProcessState,
   applyVirtualHalPinUpdates,
   applyVirtualHalToInterpSdk,
   createVirtualHalSimulationRuntimeReport,
@@ -58,6 +60,7 @@ import {
   createLinuxCncInterpSdk,
   createLinuxCncVirtualHalRuntime,
   createVirtualHalIntegrityReport,
+  createVirtualHalMillturnUserMProcessBoundaryReport,
   createVirtualHalMotionControllerMatrixReport,
   createMachineSessionSnapshotPayload,
   createVirtualHalSessionPayload,
@@ -356,6 +359,7 @@ const requiredExports = [
   ["createProjectReleaseReadinessReport", createProjectReleaseReadinessReport],
   ["createProjectReleaseReadinessSummaryViewModel", createProjectReleaseReadinessSummaryViewModel],
   ["applyVirtualHalAction", applyVirtualHalAction],
+  ["applyVirtualHalMillturnUserMProcessState", applyVirtualHalMillturnUserMProcessState],
   ["applyVirtualHalPinUpdates", applyVirtualHalPinUpdates],
   ["applyVirtualHalToInterpSdk", applyVirtualHalToInterpSdk],
   ["createLinuxCncVirtualHalRuntime", createLinuxCncVirtualHalRuntime],
@@ -363,6 +367,7 @@ const requiredExports = [
   ["createVirtualHalBridgeReadiness", createVirtualHalBridgeReadiness],
   ["createVirtualHalCommandScriptFixtureReport", createVirtualHalCommandScriptFixtureReport],
   ["createVirtualHalIntegrityReport", createVirtualHalIntegrityReport],
+  ["createVirtualHalMillturnUserMProcessBoundaryReport", createVirtualHalMillturnUserMProcessBoundaryReport],
   ["createVirtualHalMotionControllerMatrixReport", createVirtualHalMotionControllerMatrixReport],
   ["createVirtualHalPinInventory", createVirtualHalPinInventory],
   ["createVirtualHalPinRegistry", createVirtualHalPinRegistry],
@@ -648,6 +653,11 @@ assert.equal(VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS
   .sourceFiles.includes("linuxcnc/configs/sim/axis/external_offsets/M111"), true);
 assert.equal(VIRTUAL_HAL_SOURCE_DERIVED_CAPABILITIES["halcmd-simulation-replacement"].sourceFiles.includes("linuxcnc/src/hal/utils/halcmd_commands.cc"), true);
 assert.equal(VIRTUAL_HAL_SOURCE_DERIVED_CAPABILITIES["motion-controller-simulation-replacement"].sourceFiles.includes("linuxcnc/src/emc/motion/motion.c"), true);
+assert.equal(VIRTUAL_HAL_SOURCE_DERIVED_CAPABILITIES["controlled-user-m-process-state-boundary"].sourceFiles.includes("linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128"), true);
+assert.equal(VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.boundaryClass, "L4-USER-M-PROCESS");
+assert.equal(VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.cases.length, 2);
+assert.equal(VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.cases.some(({ userMCode }) => userMCode === "M128"), true);
+assert.equal(VIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY.cases.some(({ userMCode }) => userMCode === "M129"), true);
 assert.equal(VIRTUAL_HAL_COVERAGE_STATES.runtimeBoundary, "runtime-boundary");
 assert.equal(VIRTUAL_HAL_SOURCE_FILES.halui, "linuxcnc/src/emc/usr_intf/halui.cc");
 assert.equal(VIRTUAL_HAL_SYSTEM_PIN_FAMILIES.some(({ id }) => id === "iocontrol"), true);
@@ -656,6 +666,8 @@ assert.match(sdkIndexText, /\bVIRTUAL_HAL_WASM_BRIDGE_FUNCTIONS\b/);
 assert.match(sdkReadmeText, /\bVIRTUAL_HAL_WASM_BRIDGE_FUNCTIONS\b/);
 assert.match(sdkIndexText, /\bVIRTUAL_HAL_COMMAND_SCRIPT_FIXTURES\b/);
 assert.match(sdkReadmeText, /\bVIRTUAL_HAL_COMMAND_SCRIPT_FIXTURES\b/);
+assert.match(sdkIndexText, /\bVIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY\b/);
+assert.match(sdkReadmeText, /\bVIRTUAL_HAL_MILLTURN_USER_M_PROCESS_BOUNDARY\b/);
 assert.match(sdkIndexText, /\bVIRTUAL_HAL_MOTION_CONTROLLER_MATRIX_FIXTURES\b/);
 assert.match(sdkReadmeText, /\bVIRTUAL_HAL_MOTION_CONTROLLER_MATRIX_FIXTURES\b/);
 assert.match(sdkIndexText, /\bVIRTUAL_HAL_PROJECT_PIN_GROUPS\b/);
@@ -672,6 +684,10 @@ assert.match(sdkIndexText, /\bVIRTUAL_HAL_SYSTEM_PIN_FAMILIES\b/);
 assert.match(sdkReadmeText, /\bVIRTUAL_HAL_SYSTEM_PIN_FAMILIES\b/);
 assert.match(sdkIndexText, /\bexecuteVirtualHalCommand\b/);
 assert.match(sdkReadmeText, /\bexecuteVirtualHalCommand\b/);
+assert.match(sdkIndexText, /\bapplyVirtualHalMillturnUserMProcessState\b/);
+assert.match(sdkReadmeText, /\bapplyVirtualHalMillturnUserMProcessState\b/);
+assert.match(sdkIndexText, /\bcreateVirtualHalMillturnUserMProcessBoundaryReport\b/);
+assert.match(sdkReadmeText, /\bcreateVirtualHalMillturnUserMProcessBoundaryReport\b/);
 assert.match(sdkIndexText, /\bexecuteVirtualHalcmd\b/);
 assert.match(sdkReadmeText, /\bexecuteVirtualHalcmd\b/);
 assert.match(sdkIndexText, /\bcreateVirtualHalCommandScriptFixtureReport\b/);
@@ -781,6 +797,38 @@ assert.equal(virtualHalReport.pinRegistry.byName["spindle.0.speed-out"].value, 1
 assert.equal(virtualHalReport.integrity.complete, true);
 const virtualHalRuntime = createLinuxCncVirtualHalRuntime(sdkVirtualHal);
 assert.equal(virtualHalRuntime.getProjectReport({ availableFunctions: VIRTUAL_HAL_WASM_BRIDGE_FUNCTIONS }).ready, true);
+const millturnUserMBoundaryReport = createVirtualHalMillturnUserMProcessBoundaryReport({ manifestText: sourceManifestText });
+assert.equal(millturnUserMBoundaryReport.apiName, "linuxcnc-wasm-virtual-hal-millturn-user-m-process-boundary-report");
+assert.equal(millturnUserMBoundaryReport.boundaryClass, "L4-USER-M-PROCESS");
+assert.equal(millturnUserMBoundaryReport.complete, true);
+assert.equal(millturnUserMBoundaryReport.webSimulationSatisfied, true);
+assert.equal(millturnUserMBoundaryReport.executionEnabled, false);
+assert.equal(millturnUserMBoundaryReport.promotionAllowed, false);
+assert.equal(millturnUserMBoundaryReport.processExecutionReady, false);
+assert.equal(millturnUserMBoundaryReport.inventoryBaselineUnchanged, true);
+assert.equal(millturnUserMBoundaryReport.missingManifestFiles.length, 0);
+assert.equal(millturnUserMBoundaryReport.rows.some(({ userMCode, remapCode }) => userMCode === "M128" && remapCode === "M428"), true);
+assert.equal(millturnUserMBoundaryReport.rows.some(({ userMCode, remapCode }) => userMCode === "M129" && remapCode === "M429"), true);
+assert.equal(millturnUserMBoundaryReport.rows.every(({ stateTargetCount }) => stateTargetCount === 12), true);
+assert.equal(millturnUserMBoundaryReport.rows.every(({ executionEnabled, promotionAllowed }) => executionEnabled === false && promotionAllowed === false), true);
+let millturnStateResult = applyVirtualHalMillturnUserMProcessState(virtualHalRuntime.getState(), "M128", { manifestText: sourceManifestText });
+assert.equal(millturnStateResult.apiName, "linuxcnc-wasm-virtual-hal-millturn-user-m-process-state-result");
+assert.equal(millturnStateResult.ok, true);
+assert.equal(millturnStateResult.userMCode, "M128");
+assert.equal(millturnStateResult.executionEnabled, false);
+assert.equal(millturnStateResult.promotionAllowed, false);
+assert.equal(readVirtualHalPin(millturnStateResult.state, "motion.switchkins-type").value, 0);
+assert.equal(readVirtualHalPin(millturnStateResult.state, "ini.x.min_limit").value, -300);
+assert.equal(readVirtualHalPin(millturnStateResult.state, "ini.z.max_limit").value, 0);
+millturnStateResult = virtualHalRuntime.applyMillturnUserMProcessState("M129", { manifestText: sourceManifestText });
+assert.equal(millturnStateResult.userMCode, "M129");
+assert.equal(readVirtualHalPin(virtualHalRuntime.getState(), "motion.switchkins-type").value, 1);
+assert.equal(readVirtualHalPin(virtualHalRuntime.getState(), "motion.analog-out-03").value, 1);
+assert.equal(readVirtualHalPin(virtualHalRuntime.getState(), "kinstype.is-0").value, 0);
+assert.equal(readVirtualHalPin(virtualHalRuntime.getState(), "kinstype.is-1").value, 1);
+assert.equal(readVirtualHalPin(virtualHalRuntime.getState(), "ini.x.max_limit").value, 0);
+assert.equal(readVirtualHalPin(virtualHalRuntime.getState(), "ini.z.max_limit").value, 300);
+assert.equal(virtualHalRuntime.getMillturnUserMProcessBoundaryReport({ manifestText: sourceManifestText }).complete, true);
 const virtualHalcmdResult = virtualHalRuntime.executeHalCommand(`
 loadrt trivkins
 addf motion-controller servo-thread
@@ -1365,6 +1413,8 @@ assert.equal(virtualHalSessionPayload.simConfigSourceCoverage.complete, true);
 assert.equal(virtualHalSessionPayload.simConfigPromotionCandidates.complete, true);
 assert.equal(virtualHalSessionPayload.simConfigEvidenceExpansion.complete, true);
 assert.equal(virtualHalSessionPayload.simConfigMacroLoadFixtures.complete, true);
+assert.equal(virtualHalSessionPayload.millturnUserMProcessBoundary.complete, true);
+assert.equal(virtualHalSessionPayload.millturnUserMProcessBoundary.boundaryClass, "L4-USER-M-PROCESS");
 assert.equal(virtualHalSessionPayload.commandScriptFixtures.complete, true);
 assert.equal(virtualHalSessionPayload.motionControllerMatrix.complete, true);
 const virtualHalSessionSnapshot = createSessionSnapshot(
@@ -1404,6 +1454,7 @@ const browserDiagnosticsArtifact = {
     inventoryBaseline: "executed=82 passed=82 skipped=77 unexpected_fail=0",
   },
   virtualHalSimConfigMacroLoadFixtures: simConfigMacroLoadFixtureReport,
+  virtualHalMillturnUserMProcessBoundary: millturnUserMBoundaryReport,
   virtualHalCommandScriptFixtures: commandScriptFixtureReport,
   virtualHalMotionControllerMatrix: manifestCheckedMotionControllerMatrixReport,
 };
@@ -1435,6 +1486,8 @@ assert.equal(browserDiagnosticsArtifactValidation.promotionCandidateSummaryReady
 assert.equal(browserDiagnosticsArtifactValidation.hasPromotionCandidateSummary, true);
 assert.equal(browserDiagnosticsArtifactValidation.macroLoadFixturesReady, true);
 assert.equal(browserDiagnosticsArtifactValidation.hasMacroLoadFixtures, true);
+assert.equal(browserDiagnosticsArtifactValidation.millturnUserMProcessBoundaryReady, true);
+assert.equal(browserDiagnosticsArtifactValidation.hasMillturnUserMProcessBoundary, true);
 assert.equal(browserDiagnosticsArtifactValidation.commandScriptFixturesReady, true);
 assert.equal(browserDiagnosticsArtifactValidation.motionControllerMatrixReady, true);
 assert.equal(browserDiagnosticsArtifactValidation.hasSessionDiagnostics, true);
@@ -1453,6 +1506,19 @@ assert.equal(browserDiagnosticsArtifactValidation.sourceFiles.includes("linuxcnc
 assert.equal(browserDiagnosticsArtifactValidation.sourceFiles.includes("linuxcnc/configs/sim/axis/rose_engine/rcone.ngc"), true);
 assert.equal(browserDiagnosticsArtifactValidation.sourceFiles.includes("linuxcnc/configs/sim/axis/external_offsets/eoffsets.ini"), true);
 assert.equal(browserDiagnosticsArtifactValidation.sourceFiles.includes("linuxcnc/configs/sim/axis/external_offsets/eoffsets.ngc"), true);
+assert.equal(browserDiagnosticsArtifactValidation.sourceFiles.includes("linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128"), true);
+assert.equal(browserDiagnosticsArtifactValidation.sourceFiles.includes("linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M129"), true);
+assert.equal(createProjectReleaseBrowserDiagnosticsArtifactValidation({
+  ...browserDiagnosticsArtifact,
+  virtualHalMillturnUserMProcessBoundary: undefined,
+}).missing.includes("virtualHalMillturnUserMProcessBoundary"), true);
+assert.equal(createProjectReleaseBrowserDiagnosticsArtifactValidation({
+  ...browserDiagnosticsArtifact,
+  virtualHalMillturnUserMProcessBoundary: {
+    ...millturnUserMBoundaryReport,
+    promotionAllowed: true,
+  },
+}).millturnUserMProcessBoundaryReady, false);
 assert.equal(createProjectReleaseBrowserDiagnosticsArtifactValidation({
   ...browserDiagnosticsArtifact,
   virtualHalPromotionCandidateSummary: undefined,
diff --git a/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs b/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
index 9f9cdff..611de44 100644
--- a/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
+++ b/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
@@ -11,6 +11,7 @@ import {
 import {
   VIRTUAL_HAL_SIM_CONFIG_SOURCE_TARGETS,
   createVirtualHalCommandScriptFixtureReport,
+  createVirtualHalMillturnUserMProcessBoundaryReport,
   createVirtualHalMotionControllerMatrixReport,
   createVirtualHalSimConfigMacroLoadFixtureReport,
   createVirtualHalSimConfigEvidenceExpansionReport,
@@ -1473,6 +1474,16 @@ const releaseReadinessMacroLoadFixtures = createVirtualHalSimConfigMacroLoadFixt
     "linuxcnc/configs/sim/axis/external_offsets/eoffsets.ngc",
   ],
 });
+const releaseReadinessMillturnUserMProcessBoundary = createVirtualHalMillturnUserMProcessBoundaryReport({
+  manifestEntries: [
+    "linuxcnc/configs/sim/axis/vismach/millturn/millturn.ini",
+    "linuxcnc/configs/sim/axis/vismach/millturn/example.ngc",
+    "linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M128",
+    "linuxcnc/configs/sim/axis/vismach/millturn/mcodes/M129",
+    "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/428remap.ngc",
+    "linuxcnc/configs/sim/axis/vismach/millturn/remap_subs/429remap.ngc",
+  ],
+});
 const pythonRemapRuntimeProof = {
   nativeLifecycleReady: true,
   nativeProbeStatus: "runtime_lifecycle_probe_passed",
@@ -1524,6 +1535,7 @@ const browserDiagnosticsArtifact = {
     inventoryBaseline: "executed=82 passed=82 skipped=77 unexpected_fail=0",
   },
   virtualHalSimConfigMacroLoadFixtures: releaseReadinessMacroLoadFixtures,
+  virtualHalMillturnUserMProcessBoundary: releaseReadinessMillturnUserMProcessBoundary,
   virtualHalCommandScriptFixtures: createVirtualHalCommandScriptFixtureReport({ halState: browserDiagnosticsVirtualHalState }),
   virtualHalMotionControllerMatrix: releaseReadinessMotionControllerMatrix,
 };
@@ -1957,6 +1969,8 @@ assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.hasPromotionCandid
 assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.promotionCandidatesReady, true);
 assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.hasMacroLoadFixtures, true);
 assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.macroLoadFixturesReady, true);
+assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.hasMillturnUserMProcessBoundary, true);
+assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.millturnUserMProcessBoundaryReady, true);
 assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.hasSessionDiagnostics, true);
 assert.equal(releaseArtifactUrlWorkflow.diagnosticsValidation.sessionDiagnosticsReady, true);
 assert.equal(
@@ -2111,7 +2125,7 @@ assert.equal(
 );
 assert.equal(
   releaseArtifactUrlWorkflowSummary.rows.find(({ id }) => id === "hard-block-runtime-locked-preview")?.value,
-  "L4-PYTHON-REMAP:axis/laser/raster_test.ngc, L4-PYTHON-REMAP:axis/laser/vector_test.ngc, L4-PYTHON-REMAP:axis/laser/vector_test2.ngc",
+  "L4-USER-M-PROCESS:axis/vismach/millturn/example.ngc",
 );
 assert.equal(
   releaseArtifactUrlWorkflowSummary.rows.find(({ id }) => id === "hard-block-runtime-promotion-allowed")?.value,
@@ -2841,7 +2855,7 @@ const releaseArtifactUrlWorkflowMountResult =
     rowsNode: releaseArtifactUrlWorkflowRowsNode,
   });
 assert.equal(releaseArtifactUrlWorkflowRenderResult.rendered, true);
-assert.equal(releaseArtifactUrlWorkflowRenderResult.rowCount, 57);
+assert.equal(releaseArtifactUrlWorkflowRenderResult.rowCount, 53);
 assert.equal(
   releaseArtifactUrlWorkflowRenderResult.rowIds.includes("browser-diagnostics"),
   true,
@@ -2891,7 +2905,7 @@ assert.equal(
   true,
 );
 assert.equal(releaseArtifactUrlWorkflowMountResult.ready, true);
-assert.equal(releaseArtifactUrlWorkflowMountResult.renderResult.rowCount, 57);
+assert.equal(releaseArtifactUrlWorkflowMountResult.renderResult.rowCount, 53);
 const releaseArtifactUrlWorkflowMissingDom = await loadIniPanelShellWorkflowOverviewReleaseReadinessArtifactUrl({
   artifactUrl: "/project-release-readiness.json",
   fetchRef: async () => ({