diff --git a/.github/workflows/opf-ci.yml b/.github/workflows/opf-ci.yml
index 0fd6d26..6732f12 100644
--- a/.github/workflows/opf-ci.yml
+++ b/.github/workflows/opf-ci.yml
@@ -42,3 +42,6 @@ jobs:
 
       - name: Verify npm package contents
         run: pnpm --filter @openpresentation/opf pack:dry-run
+
+      - name: Verify packed package install
+        run: node packages/javascript/test/packed-install-smoke.mjs
diff --git a/packages/javascript/README.md b/packages/javascript/README.md
index 957b803..c57924c 100644
--- a/packages/javascript/README.md
+++ b/packages/javascript/README.md
@@ -61,6 +61,8 @@ import { validate, assertValid } from "@openpresentation/opf/validator";
 import type { Presentation, Audience, Tone } from "@openpresentation/opf/types";
 ```
 
+The root entry exports every schema, catalog, and validation helper for convenience. Prefer the focused subpaths above when a package consumer only needs one surface, so the root bundle's full catalog/schema payload is not loaded unnecessarily.
+
 Validate catalog records locally:
 
 ```ts
diff --git a/packages/javascript/package.json b/packages/javascript/package.json
index 7073177..5b4eea3 100644
--- a/packages/javascript/package.json
+++ b/packages/javascript/package.json
@@ -68,6 +68,7 @@
     "build": "pnpm run generate && tsup && node scripts/copy-spec.mjs",
     "typecheck": "pnpm run generate && tsc --noEmit",
     "test": "pnpm run build && node test/smoke.mjs",
+    "test:packed": "node test/packed-install-smoke.mjs",
     "pack:dry-run": "pnpm run build && npm pack --dry-run --cache /tmp/opf-npm-cache"
   },
   "dependencies": {
diff --git a/packages/javascript/test/packed-install-smoke.mjs b/packages/javascript/test/packed-install-smoke.mjs
new file mode 100644
index 0000000..3d778d3
--- /dev/null
+++ b/packages/javascript/test/packed-install-smoke.mjs
@@ -0,0 +1,123 @@
+import assert from "node:assert/strict";
+import { execFile as execFileCallback } from "node:child_process";
+import { mkdir, mkdtemp, rm, stat, writeFile } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { promisify } from "node:util";
+
+const execFile = promisify(execFileCallback);
+const packageRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const tmpRoot = await mkdtemp(path.join(os.tmpdir(), "opf-packed-smoke-"));
+const packDir = path.join(tmpRoot, "pack");
+const projectDir = path.join(tmpRoot, "project");
+
+async function run(command, args, options = {}) {
+  try {
+    return await execFile(command, args, {
+      maxBuffer: 10 * 1024 * 1024,
+      ...options,
+    });
+  } catch (error) {
+    const stdout = error.stdout ? `\nstdout:\n${error.stdout}` : "";
+    const stderr = error.stderr ? `\nstderr:\n${error.stderr}` : "";
+    error.message = `${error.message}${stdout}${stderr}`;
+    throw error;
+  }
+}
+
+function assertTarIncludes(files, entry) {
+  assert.ok(files.includes(entry), `packed tarball should include ${entry}`);
+}
+
+try {
+  await mkdir(packDir, { recursive: true });
+  await mkdir(projectDir, { recursive: true });
+  await writeFile(
+    path.join(projectDir, "package.json"),
+    `${JSON.stringify({ private: true, type: "module" }, null, 2)}\n`,
+  );
+
+  const packResult = await run("npm", ["pack", packageRoot, "--pack-destination", packDir]);
+  const tgzName = packResult.stdout.trim().split(/\r?\n/).at(-1);
+  assert.ok(tgzName?.endsWith(".tgz"), `npm pack did not return a tarball name: ${packResult.stdout}`);
+
+  const tgzPath = path.join(packDir, tgzName);
+  const tarResult = await run("tar", ["-tzf", tgzPath]);
+  const files = tarResult.stdout.trim().split(/\r?\n/).filter(Boolean).sort();
+
+  for (const entry of [
+    "package/LICENSE",
+    "package/README.md",
+    "package/package.json",
+    "package/dist/index.js",
+    "package/dist/schemas.js",
+    "package/dist/catalogs.js",
+    "package/dist/validator.js",
+    "package/dist/types.js",
+    "package/dist/spec/schemas/opf.schema.json",
+    "package/dist/spec/catalogs/audiences/board.json",
+  ]) {
+    assertTarIncludes(files, entry);
+  }
+
+  assert.equal(files.includes("package/dist/spec/openapi.yaml"), false, "OpenAPI service contract should not ship in the npm package");
+  assert.equal(files.some((file) => file.endsWith(".map")), false, "npm package should not ship source maps");
+
+  await run("npm", ["install", "--ignore-scripts", "--no-audit", "--no-fund", tgzPath], { cwd: projectDir });
+  await writeFile(
+    path.join(projectDir, "smoke.mjs"),
+    `import assert from "node:assert/strict";
+import {
+  catalogs,
+  presentation,
+  validate,
+  validatePresentation,
+} from "@openpresentation/opf";
+import { presentation as focusedPresentation } from "@openpresentation/opf/schemas";
+import { tones } from "@openpresentation/opf/catalogs";
+import { assertValid, validate as focusedValidate } from "@openpresentation/opf/validator";
+import * as typesRuntime from "@openpresentation/opf/types";
+import rawPresentation from "@openpresentation/opf/spec/schemas/opf.schema.json" with { type: "json" };
+import rawBoardAudience from "@openpresentation/opf/spec/catalogs/audiences/board.json" with { type: "json" };
+
+assert.equal(presentation.$id, "https://openpresentation.org/schema/opf/v1");
+assert.equal(focusedPresentation.$id, presentation.$id);
+assert.equal(rawPresentation.$id, presentation.$id);
+assert.equal(rawBoardAudience.id, "board");
+assert.ok(catalogs.audiences.some((audience) => audience.id === "executives"));
+assert.ok(tones.length > 0);
+assert.deepEqual(Object.keys(typesRuntime), []);
+
+const validDeck = {
+  name: "Packed Package Smoke",
+  audience: ["executives"],
+  slides: [{ title: "Smoke Test", items: ["Root import", "Focused import", "Raw JSON import"] }],
+};
+
+assert.equal(validatePresentation(validDeck).valid, true);
+assert.equal(validate(validDeck, "presentation").valid, true);
+assert.equal(focusedValidate(validDeck, "presentation").valid, true);
+assert.doesNotThrow(() => assertValid(validDeck));
+
+const invalidDeck = {
+  name: "Invalid Packed Package Smoke",
+  slides: [{ type: "placeholder" }],
+};
+const invalidResult = validatePresentation(invalidDeck);
+assert.equal(invalidResult.valid, false, "invalid deck should fail validation");
+assert.ok(invalidResult.errors.length > 0, "invalid deck should return validation errors");
+`,
+  );
+  await run(process.execPath, ["smoke.mjs"], { cwd: projectDir });
+
+  const { size } = await stat(tgzPath);
+  process.stdout.write(`Packed install smoke passed for ${tgzName} (${size} bytes).\n`);
+  process.stdout.write(`Packed tarball entries checked: ${files.length}.\n`);
+} finally {
+  if (process.env.OPF_KEEP_PACKED_SMOKE_TMP) {
+    process.stdout.write(`Preserved packed smoke temp directory: ${tmpRoot}\n`);
+  } else {
+    await rm(tmpRoot, { recursive: true, force: true });
+  }
+}
diff --git a/packages/javascript/tsup.config.ts b/packages/javascript/tsup.config.ts
index 61aca20..fbd49c3 100644
--- a/packages/javascript/tsup.config.ts
+++ b/packages/javascript/tsup.config.ts
@@ -10,7 +10,7 @@ export default defineConfig({
   },
   format: ["esm"],
   dts: true,
-  sourcemap: true,
+  sourcemap: false,
   clean: true,
   splitting: false,
   treeshake: true,