diff --git a/bun.lock b/bun.lock
index eb77f14b9..8070346f8 100644
--- a/bun.lock
+++ b/bun.lock
@@ -585,6 +585,7 @@
       },
       "devDependencies": {
         "@effect/atom-react": "catalog:",
+        "@effect/platform-node": "catalog:",
         "@effect/vitest": "catalog:",
         "@executor-js/react": "workspace:*",
         "@types/node": "catalog:",
diff --git a/packages/core/sdk/src/executor.test.ts b/packages/core/sdk/src/executor.test.ts
index 28f2ea5af..7a6621e45 100644
--- a/packages/core/sdk/src/executor.test.ts
+++ b/packages/core/sdk/src/executor.test.ts
@@ -1427,22 +1427,24 @@ describe("tenant isolation (SDK)", () => {
     }),
   );
 
-  it.effect("secrets.list surfaces provider-enumerated entries; status still gates on routed rows", () =>
-    Effect.gen(function* () {
-      const executor = yield* createExecutor(
-        makeTestConfig({ plugins: [providerOnlySecretPlugin()] as const }),
-      );
+  it.effect(
+    "secrets.list surfaces provider-enumerated entries; status still gates on routed rows",
+    () =>
+      Effect.gen(function* () {
+        const executor = yield* createExecutor(
+          makeTestConfig({ plugins: [providerOnlySecretPlugin()] as const }),
+        );
 
-      const refs = yield* executor.secrets.list();
-      const status = yield* executor.secrets.status("provider-token");
-      const value = yield* executor.secrets.get("provider-token");
+        const refs = yield* executor.secrets.list();
+        const status = yield* executor.secrets.status("provider-token");
+        const value = yield* executor.secrets.get("provider-token");
 
-      const entry = refs.find((ref) => ref.id === "provider-token");
-      expect(entry?.provider).toBe("provider-only");
-      expect(entry?.name).toBe("Provider token");
-      expect(status).toBe("missing");
-      expect(value).toBe("provider-value");
-    }),
+        const entry = refs.find((ref) => ref.id === "provider-token");
+        expect(entry?.provider).toBe("provider-only");
+        expect(entry?.name).toBe("Provider token");
+        expect(status).toBe("missing");
+        expect(value).toBe("provider-value");
+      }),
   );
 
   it.effect("secrets.get short-circuits provider fallback in registration order", () =>
diff --git a/packages/plugins/google-discovery/package.json b/packages/plugins/google-discovery/package.json
index ba3a2fb9f..2a244a826 100644
--- a/packages/plugins/google-discovery/package.json
+++ b/packages/plugins/google-discovery/package.json
@@ -60,6 +60,7 @@
   },
   "devDependencies": {
     "@effect/atom-react": "catalog:",
+    "@effect/platform-node": "catalog:",
     "@effect/vitest": "catalog:",
     "@executor-js/react": "workspace:*",
     "@types/node": "catalog:",
diff --git a/packages/plugins/google-discovery/src/sdk/option-json-repro.test.ts b/packages/plugins/google-discovery/src/sdk/option-json-repro.test.ts
new file mode 100644
index 000000000..668322549
--- /dev/null
+++ b/packages/plugins/google-discovery/src/sdk/option-json-repro.test.ts
@@ -0,0 +1,109 @@
+// Reproduces the PR 706 bug class using Effect-native primitives only —
+// no JSON.parse, no JSON.stringify, no node:fs on our side. We split the
+// JSON boundary into two Effect schema steps:
+//
+//   1. Schema.encodeEffect(Inner)(value)            → encoded JS shape
+//   2. Schema.encodeEffect(UnknownFromJsonString)   → JSON string
+//   3. fs.writeFileString → fs.readFileString
+//   4. Schema.decodeUnknownEffect(UnknownFromJsonString) → unknown
+//   5. Schema.decodeUnknownEffect(Inner)             → final value
+//
+// Even though every step runs through Effect, Schema.Option(X) still
+// breaks because its Encoded type IS Option<X> — not a JSON value. So
+// step 2's JSON-stringify (driven by Effect, not us) flattens the Option
+// to {_id,_tag,value}, and step 5 rejects the shape.
+//
+// Run: vitest run packages/plugins/google-discovery/src/sdk/option-json-repro.test.ts
+
+import { describe, expect, it } from "@effect/vitest";
+import * as NodeFileSystem from "@effect/platform-node/NodeFileSystem";
+import { Effect, Exit, FileSystem, Option, Schema } from "effect";
+
+const Broken = Schema.Struct({ description: Schema.Option(Schema.String) });
+const Fixed = Schema.Struct({ description: Schema.OptionFromOptional(Schema.String) });
+
+const broken = { description: Option.some("hello") };
+const fixed = { description: Option.some("hello") };
+
+const withTmpFile = <A, E>(fn: (path: string) => Effect.Effect<A, E, FileSystem.FileSystem>) =>
+  Effect.gen(function* () {
+    const fs = yield* FileSystem.FileSystem;
+    const dir = yield* fs.makeTempDirectoryScoped({ prefix: "option-repro-" });
+    return yield* fn(`${dir}/binding.json`);
+  }).pipe(Effect.scoped, Effect.provide(NodeFileSystem.layer));
+
+describe("Schema.Option round-trips through Effect-native JSON I/O", () => {
+  it.effect("BREAKS: every step driven by Effect, still loses the Option shape", () =>
+    withTmpFile((path) =>
+      Effect.gen(function* () {
+        const fs = yield* FileSystem.FileSystem;
+
+        // Step 1: schema encode → encoded JS shape. For Schema.Option,
+        // the encoded `description` is still an Option instance.
+        const encodedShape = yield* Schema.encodeEffect(Broken)(broken);
+        expect(Option.isOption(encodedShape.description)).toBe(true);
+
+        // Step 2: turn the encoded shape into a JSON string via Effect.
+        const jsonString = yield* Schema.encodeEffect(Schema.UnknownFromJsonString)(encodedShape);
+        // This is what Effect produced — Option's toJSON shape:
+        expect(jsonString).toContain('"_id":"Option"');
+        expect(jsonString).toContain('"_tag":"Some"');
+
+        // Step 3 + 4: round-trip via the platform FileSystem.
+        yield* fs.writeFileString(path, jsonString);
+        const onDisk = yield* fs.readFileString(path);
+
+        // Step 5: parse string → unknown via Effect.
+        const parsed = yield* Schema.decodeUnknownEffect(Schema.UnknownFromJsonString)(onDisk);
+
+        // Step 6: decode the unknown back through the schema → fails,
+        // because the wire shape isn't an Option instance.
+        const result = yield* Effect.exit(Schema.decodeUnknownEffect(Broken)(parsed));
+        expect(Exit.isFailure(result)).toBe(true);
+      }),
+    ),
+  );
+
+  it.effect("WORKS: same pipeline with Schema.OptionFromOptional", () =>
+    withTmpFile((path) =>
+      Effect.gen(function* () {
+        const fs = yield* FileSystem.FileSystem;
+
+        const encodedShape = yield* Schema.encodeEffect(Fixed)(fixed);
+        // Encoded form is JSON-safe: { description: "hello" }
+        expect(encodedShape.description).toBe("hello");
+
+        const jsonString = yield* Schema.encodeEffect(Schema.UnknownFromJsonString)(encodedShape);
+        expect(jsonString).toBe('{"description":"hello"}');
+
+        yield* fs.writeFileString(path, jsonString);
+        const onDisk = yield* fs.readFileString(path);
+
+        const parsed = yield* Schema.decodeUnknownEffect(Schema.UnknownFromJsonString)(onDisk);
+        const decoded = yield* Schema.decodeUnknownEffect(Fixed)(parsed);
+
+        expect(Option.getOrNull(decoded.description)).toBe("hello");
+      }),
+    ),
+  );
+
+  it.effect("WORKS: None round-trips as a missing key with OptionFromOptional", () =>
+    withTmpFile((path) =>
+      Effect.gen(function* () {
+        const fs = yield* FileSystem.FileSystem;
+        const noneVal = { description: Option.none<string>() };
+
+        const encodedShape = yield* Schema.encodeEffect(Fixed)(noneVal);
+        const jsonString = yield* Schema.encodeEffect(Schema.UnknownFromJsonString)(encodedShape);
+        expect(jsonString).toBe("{}");
+
+        yield* fs.writeFileString(path, jsonString);
+        const onDisk = yield* fs.readFileString(path);
+        const parsed = yield* Schema.decodeUnknownEffect(Schema.UnknownFromJsonString)(onDisk);
+        const decoded = yield* Schema.decodeUnknownEffect(Fixed)(parsed);
+
+        expect(Option.isNone(decoded.description)).toBe(true);
+      }),
+    ),
+  );
+});
diff --git a/packages/plugins/google-discovery/src/sdk/types.ts b/packages/plugins/google-discovery/src/sdk/types.ts
index b2f3a9830..468eef607 100644
--- a/packages/plugins/google-discovery/src/sdk/types.ts
+++ b/packages/plugins/google-discovery/src/sdk/types.ts
@@ -22,8 +22,8 @@ export class GoogleDiscoveryParameter extends Schema.Class<GoogleDiscoveryParame
   location: GoogleDiscoveryParameterLocation,
   required: Schema.Boolean,
   repeated: Schema.Boolean,
-  description: Schema.Option(Schema.String),
-  schema: Schema.Option(Schema.Unknown),
+  description: Schema.OptionFromOptional(Schema.String),
+  schema: Schema.OptionFromOptional(Schema.Unknown),
 }) {}
 
 export class GoogleDiscoveryMethodBinding extends Schema.Class<GoogleDiscoveryMethodBinding>(
@@ -39,22 +39,22 @@ export class GoogleDiscoveryManifestMethod extends Schema.Class<GoogleDiscoveryM
   "GoogleDiscoveryManifestMethod",
 )({
   toolPath: Schema.String,
-  description: Schema.Option(Schema.String),
+  description: Schema.OptionFromOptional(Schema.String),
   binding: GoogleDiscoveryMethodBinding,
-  inputSchema: Schema.Option(Schema.Unknown),
-  outputSchema: Schema.Option(Schema.Unknown),
+  inputSchema: Schema.OptionFromOptional(Schema.Unknown),
+  outputSchema: Schema.OptionFromOptional(Schema.Unknown),
   scopes: Schema.Array(Schema.String),
 }) {}
 
 export class GoogleDiscoveryManifest extends Schema.Class<GoogleDiscoveryManifest>(
   "GoogleDiscoveryManifest",
 )({
-  title: Schema.Option(Schema.String),
+  title: Schema.OptionFromOptional(Schema.String),
   service: Schema.String,
   version: Schema.String,
   rootUrl: Schema.String,
   servicePath: Schema.String,
-  oauthScopes: Schema.Option(Schema.Record(Schema.String, Schema.String)),
+  oauthScopes: Schema.OptionFromOptional(Schema.Record(Schema.String, Schema.String)),
   schemaDefinitions: Schema.Record(Schema.String, Schema.Unknown),
   methods: Schema.Array(GoogleDiscoveryManifestMethod),
 }) {}