diff --git a/packages/plugin-api-map/scripts/sdk-api-inventory.d.mts b/packages/plugin-api-map/scripts/sdk-api-inventory.d.mts
index ad0fbb3994..9fb3a3bf85 100644
--- a/packages/plugin-api-map/scripts/sdk-api-inventory.d.mts
+++ b/packages/plugin-api-map/scripts/sdk-api-inventory.d.mts
@@ -4,5 +4,6 @@ export interface SdkPublicApiInventory {
 }
 
 export const INVENTORY_PATH: string;
+export function hashDeclarationTokens(source: string): string;
 export function createSdkPublicApiInventory(): SdkPublicApiInventory;
 export function readSdkPublicApiInventory(): SdkPublicApiInventory;
diff --git a/packages/plugin-api-map/scripts/sdk-api-inventory.mjs b/packages/plugin-api-map/scripts/sdk-api-inventory.mjs
index 98dd10fc51..94d9b6c621 100644
--- a/packages/plugin-api-map/scripts/sdk-api-inventory.mjs
+++ b/packages/plugin-api-map/scripts/sdk-api-inventory.mjs
@@ -9,23 +9,27 @@ const PACKAGE_ROOT = resolve(dirname(fileURLToPath(import.meta.url)), "..");
 const SDK_ROOT = resolve(PACKAGE_ROOT, "../plugin-sdk");
 export const INVENTORY_PATH = join(PACKAGE_ROOT, "sdk-public-api.json");
 
-function canonicalDeclaration(source, fileName) {
-  const sourceFile = ts.createSourceFile(
-    fileName,
-    source,
+export function hashDeclarationTokens(source) {
+  // build:types has already parsed and normalized these declarations. Scanning
+  // their tokens keeps the inventory insensitive to comments and formatting
+  // without repeating a full TypeScript parse and print for every subpath.
+  const hash = createHash("sha256");
+  const scanner = ts.createScanner(
     ts.ScriptTarget.Latest,
     true,
-    ts.ScriptKind.TS,
+    ts.LanguageVariant.Standard,
+    source,
   );
-  const printer = ts.createPrinter({
-    newLine: ts.NewLineKind.LineFeed,
-    removeComments: true,
-  });
-  return sourceFile.statements
-    .map((statement) =>
-      printer.printNode(ts.EmitHint.Unspecified, statement, sourceFile),
-    )
-    .join("\n");
+  for (
+    let token = scanner.scan();
+    token !== ts.SyntaxKind.EndOfFileToken;
+    token = scanner.scan()
+  ) {
+    const text = scanner.getTokenText();
+    hash.update(`${token}:${Buffer.byteLength(text)}:`);
+    hash.update(text);
+  }
+  return hash.digest("hex");
 }
 
 function publicTypeEntries() {
@@ -55,15 +59,11 @@ export function createSdkPublicApiInventory() {
     schemaVersion: 1,
     entries: Object.fromEntries(
       publicTypeEntries().map(([subpath, entry]) => {
-        const canonical = canonicalDeclaration(
-          readFileSync(entry.path, "utf8"),
-          entry.path,
-        );
         return [
           subpath,
           {
             types: entry.types,
-            sha256: createHash("sha256").update(canonical).digest("hex"),
+            sha256: hashDeclarationTokens(readFileSync(entry.path, "utf8")),
           },
         ];
       }),
diff --git a/packages/plugin-api-map/sdk-public-api.json b/packages/plugin-api-map/sdk-public-api.json
index 41ba7d3497..12722bee24 100644
--- a/packages/plugin-api-map/sdk-public-api.json
+++ b/packages/plugin-api-map/sdk-public-api.json
@@ -3,43 +3,43 @@
   "entries": {
     ".": {
       "types": "bundled-types/bb-plugin-sdk.d.ts",
-      "sha256": "840e5e196f66d9b0ba57097c9eb23e75ed638d8483d5fcb6f17a9d9dddfe516a"
+      "sha256": "7994e5e3cc8a3f743d1098cb09334201ae359aac5148bd945fb1ac429908c80f"
     },
     "./ai-services": {
       "types": "bundled-types/bb-plugin-sdk-ai-services.d.ts",
-      "sha256": "97b4294f28f476c4c2fbe5db621686ae66ddee616f2ba6bed2fc29e7cb122317"
+      "sha256": "da4f251124361cf0d1bf1d21168d81a4f064bbc71aee1e15d89d351e92b34234"
     },
     "./app": {
       "types": "bundled-types/bb-plugin-sdk-app.d.ts",
-      "sha256": "2b9516df9eacc9b8e6f0b9695c9a1117bcc135e62e0541434dc53817939c5c85"
+      "sha256": "d5a5ca8bb14f04dbe5d53dc47470412337ce1fcf8a8019c692479620b05ef7c2"
     },
     "./host": {
       "types": "bundled-types/bb-plugin-sdk-host.d.ts",
-      "sha256": "4b07e41aecd8f0668324c8016633237037bf4b325f00d12c8dbb5e1bf568385f"
+      "sha256": "355d8480a6d834206efbd02f1e8537d146a4d0dcbe73a9ae99c86c4929d4f7ea"
     },
     "./provider-bridge": {
       "types": "bundled-types/bb-plugin-sdk-provider-bridge.d.ts",
-      "sha256": "1ef4800cd3125f662d6dde23ede7c58713ada026124e47af7cf07f03e2b0e1ff"
+      "sha256": "92fe1b5ad8514c8b9f758f7119821137433c1d7fd27e6109e94de6beed053243"
     },
     "./provider-bridge/acp": {
       "types": "bundled-types/bb-plugin-sdk-provider-bridge-acp.d.ts",
-      "sha256": "b0f99e3f95243581363f764f34036c1ca4ef65f12f940ac53c8b897789960aaa"
+      "sha256": "45536c1752a316b4fe3c4267efe6178114a3a534d1af38e1980a503b164aa5e1"
     },
     "./provider-bridge/testing": {
       "types": "bundled-types/bb-plugin-sdk-provider-bridge-testing.d.ts",
-      "sha256": "1b722f069b8da3519c840bbfa964a29452227a7017095116f0f52186290abf7a"
+      "sha256": "7c97c6976876e450ecc9dab36314a48215aae11054e410f985433cd322f9cde8"
     },
     "./testing": {
       "types": "bundled-types/bb-plugin-sdk-testing.d.ts",
-      "sha256": "693ff804ff2a80f4ae1041f623ca01b58e48ff833a82b952c989c6589afbbbf7"
+      "sha256": "3fb82277e547add8ba4df1014809d4b0aae89bcbed3263a7ae1da1d5fb2021f4"
     },
     "./testing/app": {
       "types": "bundled-types/bb-plugin-sdk-testing-app.d.ts",
-      "sha256": "c9de1acc9d5d24da0dccab82577975d58bee9a99c48ed5c2063a1301d723eac4"
+      "sha256": "e618f89997828f11b10520e9dcd00b4b26e0fad7f49fb6030b55189c3247b3ba"
     },
     "./testing/host": {
       "types": "bundled-types/bb-plugin-sdk-testing-host.d.ts",
-      "sha256": "4a03019a60ef5950c9df363e330995f928b5f73a2c6b9ccf93c033717c27a297"
+      "sha256": "5c3f3e6971ce1e0bf9e46db7bbada5090e51442e9f2951ecfb84058d3db1b80b"
     }
   }
 }
diff --git a/packages/plugin-api-map/test/api-sync.test.ts b/packages/plugin-api-map/test/api-sync.test.ts
index c5f21ef46f..8d79480d45 100644
--- a/packages/plugin-api-map/test/api-sync.test.ts
+++ b/packages/plugin-api-map/test/api-sync.test.ts
@@ -16,6 +16,7 @@ import { describe, expect, it } from "vitest";
 import { SURFACE_GROUPS } from "../src/index";
 import {
   createSdkPublicApiInventory,
+  hashDeclarationTokens,
   readSdkPublicApiInventory,
 } from "../scripts/sdk-api-inventory.mjs";
 
@@ -52,6 +53,25 @@ const EXPORTED = new Set(
 const SURFACES = SURFACE_GROUPS.flatMap((group) => group.surfaces);
 
 describe("public SDK inventory", () => {
+  it("ignores declaration trivia but preserves every API token", () => {
+    const compact =
+      "export interface PluginApi { run(input: string): Promise<void>; }";
+    const formatted = `
+      /** Public plugin API. */
+      export interface PluginApi {
+        // Run the plugin.
+        run(input: string): Promise<void>;
+      }
+    `;
+
+    expect(hashDeclarationTokens(formatted)).toBe(
+      hashDeclarationTokens(compact),
+    );
+    expect(hashDeclarationTokens(compact.replace("string", "number"))).not.toBe(
+      hashDeclarationTokens(compact),
+    );
+  });
+
   it("matches every non-internal published declaration subpath", () => {
     // This is intentionally an exact declaration-shape gate, not only an
     // export-name list: adding a BbPluginApi property or an interface method