diff --git a/core/sdk/patch-nodes.gen.ts b/core/sdk/patch-nodes.gen.ts
index ce8f5dcf..70332a74 100644
--- a/core/sdk/patch-nodes.gen.ts
+++ b/core/sdk/patch-nodes.gen.ts
@@ -1439,6 +1439,26 @@ export type PatchNodeTable = {
       right: "a";
     };
   };
+  /** the vocoder's built-in carrier (saw, supersaw, pulse or noise) following the notes */
+  "engine.vocoder": {
+    main: "a";
+    params: {
+      /** which instrument of this engine plays (default "vocoder") */
+      instrument?: "vocoder";
+      /** engine settings, as the track field holds them */
+      settings?: Readonly<Record<string, unknown>>;
+    };
+    inputs: {
+      /** the notes to play (wire in.notes) */
+      notes: "n";
+    };
+    outputs: {
+      /** audio out (left when stereo) */
+      out: "a";
+      /** right out (equals out for a mono engine) */
+      right: "a";
+    };
+  };
   /** resonant biquad: low-pass, high-pass or band-pass */
   "fx.filter": {
     main: "a";
@@ -2933,6 +2953,16 @@ export const PATCH_NODE_PORTS: Readonly<
     ],
     engine: ["keys"],
   },
+  "engine.vocoder": {
+    rate: "global",
+    params: ["instrument"],
+    inputs: [["notes", "n"]],
+    outputs: [
+      ["out", "a"],
+      ["right", "a"],
+    ],
+    engine: ["vocoder"],
+  },
   "fx.filter": {
     rate: "global",
     params: ["type", "ftype", "cutoff", "resonance"],
diff --git a/core/sdk/v1.ts b/core/sdk/v1.ts
index 85c0cdfd..9e607d0f 100644
--- a/core/sdk/v1.ts
+++ b/core/sdk/v1.ts
@@ -12476,6 +12476,26 @@ export type PatchNodeTable = {
       right: "a";
     };
   };
+  /** the vocoder's built-in carrier (saw, supersaw, pulse or noise) following the notes */
+  "engine.vocoder": {
+    main: "a";
+    params: {
+      /** which instrument of this engine plays (default "vocoder") */
+      instrument?: "vocoder";
+      /** engine settings, as the track field holds them */
+      settings?: Readonly<Record<string, unknown>>;
+    };
+    inputs: {
+      /** the notes to play (wire in.notes) */
+      notes: "n";
+    };
+    outputs: {
+      /** audio out (left when stereo) */
+      out: "a";
+      /** right out (equals out for a mono engine) */
+      right: "a";
+    };
+  };
   /** resonant biquad: low-pass, high-pass or band-pass */
   "fx.filter": {
     main: "a";
@@ -13970,6 +13990,16 @@ export const PATCH_NODE_PORTS: Readonly<
     ],
     engine: ["keys"],
   },
+  "engine.vocoder": {
+    rate: "global",
+    params: ["instrument"],
+    inputs: [["notes", "n"]],
+    outputs: [
+      ["out", "a"],
+      ["right", "a"],
+    ],
+    engine: ["vocoder"],
+  },
   "fx.filter": {
     rate: "global",
     params: ["type", "ftype", "cutoff", "resonance"],
diff --git a/src/commands/patch.ts b/src/commands/patch.ts
index eb9e8094..44c4dbb4 100644
--- a/src/commands/patch.ts
+++ b/src/commands/patch.ts
@@ -10,7 +10,7 @@
  *   patch macro <id> <node.port>[:min..max] … [range a..b] [default x] [curve exp] [label "…"]
  *   patch knob <macro> <value>                       sets a macro's value (a knob)
  *   patch rate <id> global|voice                     forces a node to run once per track
- *   patch mod <macro|node.port> <pattern>            (needs the SDK's pattern signals)
+ *   patch mod <macro|node.port> <pattern>            (refuses: typed patterns need a parser; SDK mods: work)
  *   patch rm <id>                                    a node (and its cables) or a macro
  *   patch convert                                    the instrument, wrapped as a patch
  *   patch detach                                     a shared library patch, copied into the track
@@ -1037,7 +1037,7 @@ function applyOne(
     }
     case "patch-mod":
       return bad(
-        "patch mod: pattern signals arrive with SDK 1.34 (sine.range(…) on mods:); set the macro with patch knob for now",
+        "patch mod: typed patterns are not wired yet; write mods: { cutoff: sine.slow(4) } in the track file (SDK 1.35.0), or set the macro with patch knob",
       );
     case "patch-new":
     case "patch-load": {
diff --git a/test/four-ways.test.ts b/test/four-ways.test.ts
index e0bad3ed..6c029b43 100644
--- a/test/four-ways.test.ts
+++ b/test/four-ways.test.ts
@@ -37,12 +37,6 @@ type Feature = Readonly<{
   gap?: Readonly<Partial<Record<"menu" | "agent" | "sdk", string>>>;
 }>;
 
-// TODO(patcher lane 4): drop this gap when the SDK builder merges; the
-// test fails as soon as the door opens.
-const PATCH_GAPS = {
-  sdk: "patch(), fxPatch(), macro(), track.patch and song.patches land with patcher lane 4 (SDK 1.34.0)",
-} as const;
-
 export const FEATURES: readonly Feature[] = [
   {
     feature: "notes",
@@ -244,63 +238,57 @@ export const FEATURES: readonly Feature[] = [
     sdk: ["sdk:rig", "track.fx"],
   },
   // Patcher (design §6.1, §7.4): every `patch` verb. The Sound › Patch rows
-  // live in src/tui/patch-menu.ts, the SDK builder lands with lane 4
-  // (SDK 1.34.0: patch(), fxPatch(), macro(), track.patch, song.patches).
+  // live in src/tui/patch-menu.ts; the SDK door is the builder (SDK 1.35.0):
+  // `instrument: patch(…)`, `fx: { patch: [fxPatch(…)] }`, `song.patches`,
+  // macros through `patch()`'s build callback and `patch({ ref, macros })`.
   {
     feature: "patch new",
     command: "patch new mine",
     menu: "Sound › Patch › New patch…",
     tools: ["patch_edit"],
     sdk: ["sdk:patch", "sdk:fxPatch", "song.patches"],
-    gap: PATCH_GAPS,
   },
   {
     feature: "patch add",
     command: "patch add osc as tone",
     menu: "Sound › Patch › Add node…",
     tools: ["patch_edit"],
-    sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch set",
     command: "patch set tone wave=saw",
     menu: "Sound › Patch › Set node",
     tools: ["patch_edit"],
-    sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch wire",
     command: "patch wire tone.out out.audio",
     menu: "Sound › Patch › Wire…",
     tools: ["patch_edit"],
-    sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch unwire",
     command: "patch unwire tone.out out.audio",
     menu: "Sound › Patch › Unwire…",
     tools: ["patch_edit"],
-    sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch macro",
     command: "patch macro cutoff vcf.cutoff",
     menu: "Sound › Patch › Map to knob…",
     tools: ["patch_edit"],
-    sdk: ["sdk:macro"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch"],
   },
   {
     feature: "patch knob",
     command: "patch knob cutoff 900",
     menu: "Sound › Patch › Turn knob",
     tools: ["patch_edit"],
-    sdk: ["track.patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch rate",
@@ -308,47 +296,41 @@ export const FEATURES: readonly Feature[] = [
     menu: "Sound › Patch › Node rate…",
     tools: ["patch_edit"],
     sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
   },
   {
     feature: "patch rm",
     command: "patch rm tone",
     menu: "Sound › Patch › Remove node…",
     tools: ["patch_edit"],
-    sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch convert",
     command: "patch convert",
     menu: "Sound › Patch › Convert to patch",
     tools: ["patch_edit"],
-    sdk: ["track.patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "track.instrument"],
   },
   {
     feature: "patch detach",
     command: "patch detach",
     menu: "Sound › Patch › Detach",
     tools: ["patch_edit"],
-    sdk: ["track.patch"],
-    gap: PATCH_GAPS,
+    sdk: ["track.instrument", "track.synth"],
   },
   {
     feature: "patch save",
     command: "patch save mine",
     menu: "Sound › Patch › Save patch…",
     tools: ["patch_edit"],
-    sdk: ["song.patches"],
-    gap: PATCH_GAPS,
+    sdk: ["song.patches", "sdk:patch"],
   },
   {
     feature: "patch load",
     command: "patch load acid-bass",
     menu: "Sound › Patch › Load patch…",
     tools: ["patch_edit"],
-    sdk: ["track.patch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:patch", "song.patches"],
   },
   {
     feature: "patch show",
@@ -356,7 +338,6 @@ export const FEATURES: readonly Feature[] = [
     menu: "Sound › Patch › Show as text",
     tools: ["patch_edit"],
     sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
   },
   {
     feature: "patch nodes",
@@ -364,27 +345,25 @@ export const FEATURES: readonly Feature[] = [
     menu: "Sound › Patch › List node types",
     tools: ["patch_edit"],
     sdk: ["sdk:patch"],
-    gap: PATCH_GAPS,
   },
   {
     feature: "effect patch",
     command: "patch new wobble effect",
     menu: "Effects › Add effect patch",
     tools: ["patch_edit"],
-    sdk: ["sdk:fxPatch"],
-    gap: PATCH_GAPS,
+    sdk: ["sdk:fxPatch", "track.fx"],
   },
   {
     feature: "patch mod",
     command: "patch mod cutoff sine.slow(4)",
     menu: "verb:patch mod",
     tools: ["patch_edit"],
-    sdk: ["track.mods"],
-    // TODO(patcher lane 4): pattern signals (sine.range(…), pat("…")) are
-    // SDK 1.34.0; the typed verb parses and says so until then.
+    // The SDK drives a macro with a pattern (`mods: { cutoff: sine.slow(4) }`,
+    // SDK 1.35.0). `mods` is input only: song() bakes it into the
+    // `patch-<macro>` lane under `automation`, which the printer writes back.
+    sdk: ["sdk:pat", "sdk:irand", "track.automation"],
     gap: {
-      menu: "a pattern is typed text; ctrl-k gets a row once patterns land with lane 4",
-      sdk: "track mods: and pattern signals land with patcher lane 4 (SDK 1.34.0)",
+      menu: "the typed verb still refuses (it needs a parser for pattern text); its ctrl-k row comes with it",
     },
   },
 ];