diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7962be4..6c78901 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.6.2] - 2026-05-11
+
+### Fixed
+
+- Fixed the published `memory-diag` npm bin by compiling the diagnostics CLI before packing and launching the compiled JavaScript runtime instead of type-stripping TypeScript under `node_modules`.
+
+### Added
+
+- Added a pack/npx smoke test that runs `memory-diag --help` from a packed tarball outside the repository.
+
 ## [1.6.1] - 2026-05-08
 
 ### Added
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 7a2701f..b45e122 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,40 @@
 # Release Notes
 
+## 1.6.2 (2026-05-11)
+
+### Published `memory-diag` Bin Fix
+
+This patch release fixes the published npm package path for `memory-diag`. In v1.6.1 the source-tree CLI tests passed, but the installed package could fail under `npx --package opencode-working-memory memory-diag` because Node refuses TypeScript type stripping for files inside `node_modules`.
+
+v1.6.2 compiles the diagnostics CLI during packing and makes the npm bin launch the compiled JavaScript runtime.
+
+### What Changed
+
+- **Compiled diagnostics runtime**: `prepack` now builds `dist/scripts/memory-diag.js` before the package is packed or published.
+- **Safer npm bin wrapper**: `memory-diag` no longer runs published `.ts` files through `--experimental-strip-types`; it launches the compiled JS artifact and reports a clear reinstall/build message if the artifact is missing.
+- **Packaged-bin smoke test**: release verification now includes a pack/npx smoke test from a temp consumer project outside the repository.
+
+### Upgrade Notes
+
+- No config changes are required.
+- Existing OpenCode server and TUI plugin entry points are unchanged.
+- If you hit the v1.6.1 bin failure, upgrade and rerun:
+
+```bash
+npx --package opencode-working-memory@1.6.2 memory-diag --help
+```
+
+### Validation
+
+- `npm run build` — `BUILD_PASS`
+- `node ./scripts/memory-diag-bin.cjs --help`
+- `npm run test:pack:memory-diag` — packed tarball smoke test passed
+- `npm run typecheck` — `TYPECHECK_PASS`
+- `npm test` — 421 tests passing, `TEST_PASS`
+- `npm pack --dry-run` — includes compiled `dist/` diagnostics artifacts
+
+---
+
 ## 1.6.1 (2026-05-08)
 
 ### Native TUI Memory Menu
diff --git a/package.json b/package.json
index 08759cb..52cd7f3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "opencode-working-memory",
-  "version": "1.6.1",
+  "version": "1.6.2",
   "description": "Three-layer memory architecture for OpenCode with workspace memory and hot session state",
   "type": "module",
   "main": "index.ts",
@@ -18,12 +18,17 @@
     "scripts/memory-diag.ts",
     "scripts/memory-diag/",
     "scripts/memory-diag-bin.cjs",
+    "dist/",
     "README.md",
     "LICENSE"
   ],
   "scripts": {
-    "build": "node -e \"console.log('No build step required: OpenCode loads index.ts directly')\"",
-    "diag": "node --experimental-strip-types scripts/memory-diag.ts",
+    "clean:dist": "node -e \"require('node:fs').rmSync('dist',{recursive:true,force:true})\"",
+    "build:memory-diag": "npm run clean:dist && tsc -p tsconfig.memory-diag.json",
+    "build": "npm run build:memory-diag && node -e \"console.log('BUILD_PASS')\"",
+    "prepack": "npm run build",
+    "diag": "npm run --silent build:memory-diag && node ./scripts/memory-diag-bin.cjs",
+    "test:pack:memory-diag": "node --test --experimental-strip-types tests/smoke/memory-diag-packaging.test.ts",
     "typecheck": "tsc --noEmit && node -e \"console.log('TYPECHECK_PASS')\"",
     "test": "node --import ./tests/setup-xdg-data-home.ts --test --experimental-strip-types tests/*.test.ts && node -e \"console.log('TEST_PASS')\"",
     "check:compat": "npm install --no-save @opencode-ai/plugin@latest && npm run typecheck && npm test"
diff --git a/scripts/memory-diag-bin.cjs b/scripts/memory-diag-bin.cjs
index 6ebfef7..dc1fc46 100755
--- a/scripts/memory-diag-bin.cjs
+++ b/scripts/memory-diag-bin.cjs
@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 const { execFileSync } = require("child_process");
+const { existsSync } = require("fs");
 const path = require("path");
 
 function isSupportedNodeVersion(version) {
@@ -9,13 +10,19 @@ function isSupportedNodeVersion(version) {
 }
 
 if (!isSupportedNodeVersion(process.versions.node)) {
-  process.stderr.write(`memory-diag requires Node >=22.6.0 because it runs TypeScript with --experimental-strip-types. Current Node: v${process.versions.node}.\n`);
+  process.stderr.write(`memory-diag requires Node >=22.6.0 per opencode-working-memory package engines. Current Node: v${process.versions.node}.\n`);
   process.exit(1);
 }
 
 const binDir = __dirname;
-const tsScript = path.join(binDir, "memory-diag.ts");
-const args = ["--experimental-strip-types", tsScript, ...process.argv.slice(2)];
+const compiledScript = path.join(binDir, "..", "dist", "scripts", "memory-diag.js");
+
+if (!existsSync(compiledScript)) {
+  process.stderr.write("memory-diag package is missing dist/scripts/memory-diag.js. Reinstall opencode-working-memory or run npm run build before using the local package.\n");
+  process.exit(1);
+}
+
+const args = [compiledScript, ...process.argv.slice(2)];
 try {
   execFileSync(process.execPath, args, { stdio: "inherit" });
   process.exit(0);
diff --git a/tests/smoke/memory-diag-packaging.test.ts b/tests/smoke/memory-diag-packaging.test.ts
new file mode 100644
index 0000000..1aa3c20
--- /dev/null
+++ b/tests/smoke/memory-diag-packaging.test.ts
@@ -0,0 +1,51 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { execFile } from "node:child_process";
+import { mkdir, mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import { promisify } from "node:util";
+
+const execFileAsync = promisify(execFile);
+const repoRoot = join(dirname(fileURLToPath(import.meta.url)), "../..");
+const maxBuffer = 10 * 1024 * 1024;
+
+function executable(name: "npm" | "npx"): string {
+  return process.platform === "win32" ? `${name}.cmd` : name;
+}
+
+test("packed memory-diag bin runs from a temp consumer project", async () => {
+  const tempRoot = await mkdtemp(join(tmpdir(), "opencode-memory-diag-packaging-"));
+  const packDir = join(tempRoot, "pack");
+  const consumerDir = join(tempRoot, "consumer");
+
+  try {
+    await mkdir(packDir, { recursive: true });
+    await mkdir(consumerDir, { recursive: true });
+
+    const packResult = await execFileAsync(executable("npm"), [
+      "pack",
+      repoRoot,
+      "--pack-destination",
+      packDir,
+      "--silent",
+    ], { cwd: tempRoot, maxBuffer });
+    const tarballName = packResult.stdout.trim().split(/\r?\n/).filter(Boolean).at(-1);
+    assert.ok(tarballName, `npm pack did not report a tarball name. stdout:\n${packResult.stdout}\nstderr:\n${packResult.stderr}`);
+
+    const tarballPath = join(packDir, tarballName);
+    const runResult = await execFileAsync(executable("npx"), [
+      "--yes",
+      "--package",
+      tarballPath,
+      "memory-diag",
+      "--help",
+    ], { cwd: consumerDir, maxBuffer });
+
+    assert.match(runResult.stdout, /Usage:/);
+    assert.match(runResult.stdout, /memory-diag \[status\]/);
+  } finally {
+    await rm(tempRoot, { recursive: true, force: true });
+  }
+});
diff --git a/tsconfig.memory-diag.json b/tsconfig.memory-diag.json
new file mode 100644
index 0000000..5d329f5
--- /dev/null
+++ b/tsconfig.memory-diag.json
@@ -0,0 +1,27 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "allowImportingTsExtensions": true,
+    "noEmit": false,
+    "outDir": "dist",
+    "rootDir": ".",
+    "declaration": false,
+    "sourceMap": false,
+    "rewriteRelativeImportExtensions": true,
+    "tsBuildInfoFile": "dist/.tsbuildinfo"
+  },
+  "include": ["scripts/memory-diag.ts", "scripts/memory-diag/**/*.ts", "src/**/*.ts"],
+  "exclude": [
+    "node_modules",
+    "dist",
+    "tests",
+    "src/plugin.ts",
+    "src/tui-plugin.ts",
+    "src/opencode.ts",
+    "src/session-state.ts",
+    "src/extractors.ts",
+    "src/pending-journal.ts",
+    "src/promotion-accounting.ts",
+    "src/memory-visibility.ts"
+  ]
+}