diff --git a/docs/plugins/manifest.md b/docs/plugins/manifest.md
index b66887e9e29..93b3af3ebe3 100644
--- a/docs/plugins/manifest.md
+++ b/docs/plugins/manifest.md
@@ -1024,7 +1024,7 @@ Important examples:
 | `openclaw.extensions`                                             | Declares native plugin entrypoints. Must stay inside the plugin package directory.                                                                                                   |
 | `openclaw.runtimeExtensions`                                      | Declares built JavaScript runtime entrypoints for installed packages. Must stay inside the plugin package directory.                                                                 |
 | `openclaw.setupEntry`                                             | Lightweight setup-only entrypoint used during onboarding, deferred channel startup, and read-only channel status/SecretRef discovery. Must stay inside the plugin package directory. |
-| `openclaw.runtimeSetupEntry`                                      | Declares the built JavaScript setup entrypoint for installed packages. Must stay inside the plugin package directory.                                                                |
+| `openclaw.runtimeSetupEntry`                                      | Declares the built JavaScript setup entrypoint for installed packages. Requires `setupEntry`, must exist, and must stay inside the plugin package directory.                         |
 | `openclaw.channel`                                                | Cheap channel catalog metadata like labels, docs paths, aliases, and selection copy.                                                                                                 |
 | `openclaw.channel.commands`                                       | Static native command and native skill auto-default metadata used by config, audit, and command-list surfaces before channel runtime loads.                                          |
 | `openclaw.channel.configuredState`                                | Lightweight configured-state checker metadata that can answer "does env-only setup already exist?" without loading the full channel runtime.                                         |
diff --git a/docs/plugins/sdk-entrypoints.md b/docs/plugins/sdk-entrypoints.md
index 3ae01f6c610..1a24c9c1f09 100644
--- a/docs/plugins/sdk-entrypoints.md
+++ b/docs/plugins/sdk-entrypoints.md
@@ -28,9 +28,12 @@ JavaScript when available:
 `extensions` and `setupEntry` remain valid source entries for workspace and git
 checkout development. `runtimeExtensions` and `runtimeSetupEntry` are preferred
 when OpenClaw loads an installed package and let npm packages avoid runtime
-TypeScript compilation. If an installed package only declares a TypeScript
-source entry, OpenClaw will use a matching built `dist/*.js` peer when one
-exists, then fall back to the TypeScript source.
+TypeScript compilation. Explicit runtime entries are required: `runtimeSetupEntry`
+requires `setupEntry`, and missing `runtimeExtensions` or `runtimeSetupEntry`
+artifacts fail install/discovery instead of silently falling back to source. If
+an installed package only declares a TypeScript source entry, OpenClaw will use a
+matching built `dist/*.js` peer when one exists, then fall back to the TypeScript
+source.
 
 All entry paths must stay inside the plugin package directory. Runtime entries
 and inferred built JavaScript peers do not make an escaping `extensions` or
diff --git a/docs/tools/plugin.md b/docs/tools/plugin.md
index a2f31a6cd7d..c756c3e4504 100644
--- a/docs/tools/plugin.md
+++ b/docs/tools/plugin.md
@@ -130,7 +130,9 @@ peer such as `src/index.ts` to `dist/index.js`.
 Use `openclaw.runtimeExtensions` when published runtime files do not live at the
 same paths as the source entries. When present, `runtimeExtensions` must contain
 exactly one entry for every `extensions` entry. Mismatched lists fail install and
-plugin discovery rather than silently falling back to source paths.
+plugin discovery rather than silently falling back to source paths. If you also
+publish `openclaw.setupEntry`, use `openclaw.runtimeSetupEntry` for its built
+JavaScript peer; that file is required when declared.
 
 ```json
 {
diff --git a/src/plugins/discovery.test.ts b/src/plugins/discovery.test.ts
index 3d063dea905..9f197ba1480 100644
--- a/src/plugins/discovery.test.ts
+++ b/src/plugins/discovery.test.ts
@@ -791,6 +791,37 @@ describe("discoverOpenClawPlugins", () => {
     );
   });
 
+  it("rejects missing explicit runtime setup entries for installed package plugins", async () => {
+    const stateDir = makeTempDir();
+    const pluginDir = path.join(stateDir, "extensions", "missing-runtime-setup-pack");
+    mkdirSafe(path.join(pluginDir, "src"));
+    mkdirSafe(path.join(pluginDir, "dist"));
+
+    writePluginPackageManifest({
+      packageDir: pluginDir,
+      packageName: "@openclaw/missing-runtime-setup-pack",
+      extensions: ["./dist/index.js"],
+      setupEntry: "./src/setup-entry.ts",
+      runtimeSetupEntry: "./dist/setup-entry.js",
+    });
+    writePluginEntry(path.join(pluginDir, "dist", "index.js"));
+    writePluginEntry(path.join(pluginDir, "src", "setup-entry.ts"));
+
+    const result = await discoverWithStateDir(stateDir, {});
+    const candidate = findCandidateById(result.candidates, "missing-runtime-setup-pack");
+
+    expect(candidate).toBeDefined();
+    expect(candidate?.setupSource).toBeUndefined();
+    expect(
+      result.diagnostics.some(
+        (entry) =>
+          entry.level === "error" &&
+          entry.message.includes("runtime setup entry not found") &&
+          entry.message.includes("./dist/setup-entry.js"),
+      ),
+    ).toBe(true);
+  });
+
   it("rejects package runtimeExtensions that do not match extension entries", async () => {
     const stateDir = makeTempDir();
     const pluginDir = path.join(stateDir, "extensions", "runtime-mismatch-pack");
diff --git a/src/plugins/install.test.ts b/src/plugins/install.test.ts
index 338991ba872..c97745ee4a8 100644
--- a/src/plugins/install.test.ts
+++ b/src/plugins/install.test.ts
@@ -920,6 +920,38 @@ describe("installPluginFromArchive", () => {
     }
   });
 
+  it("rejects package installs when runtimeSetupEntry is missing", async () => {
+    const { pluginDir, extensionsDir } = setupPluginInstallDirs();
+    fs.mkdirSync(path.join(pluginDir, "src"), { recursive: true });
+    fs.mkdirSync(path.join(pluginDir, "dist"), { recursive: true });
+    fs.writeFileSync(
+      path.join(pluginDir, "package.json"),
+      JSON.stringify({
+        name: "missing-runtime-setup-plugin",
+        version: "1.0.0",
+        openclaw: {
+          extensions: ["./dist/index.js"],
+          setupEntry: "./src/setup-entry.ts",
+          runtimeSetupEntry: "./dist/setup-entry.js",
+        },
+      }),
+    );
+    fs.writeFileSync(path.join(pluginDir, "dist", "index.js"), "export {};\n");
+    fs.writeFileSync(path.join(pluginDir, "src", "setup-entry.ts"), "export {};\n");
+
+    const result = await installPluginFromDir({
+      dirPath: pluginDir,
+      extensionsDir,
+    });
+
+    expect(result.ok).toBe(false);
+    if (!result.ok) {
+      expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.INVALID_OPENCLAW_EXTENSIONS);
+      expect(result.error).toContain("runtime setup entry not found");
+      expect(result.error).toContain("./dist/setup-entry.js");
+    }
+  });
+
   it("rejects package installs when an extension entry is a symlink escape", async () => {
     const { pluginDir, extensionsDir } = setupPluginInstallDirs();
     const outsideDir = path.join(path.dirname(pluginDir), "outside-symlink");
diff --git a/src/plugins/package-entry-resolution.ts b/src/plugins/package-entry-resolution.ts
index c5e1d9e06d5..a8785829180 100644
--- a/src/plugins/package-entry-resolution.ts
+++ b/src/plugins/package-entry-resolution.ts
@@ -168,6 +168,64 @@ export async function validatePackageExtensionEntriesForInstall(params: {
     }
   }
 
+  const packageManifest = getPackageManifestMetadata(params.manifest);
+  const setupEntry = normalizeOptionalString(packageManifest?.setupEntry);
+  const runtimeSetupEntry = normalizeOptionalString(packageManifest?.runtimeSetupEntry);
+  if (runtimeSetupEntry && !setupEntry) {
+    return {
+      ok: false,
+      error: "package.json openclaw.runtimeSetupEntry requires openclaw.setupEntry",
+    };
+  }
+  if (setupEntry) {
+    const sourceEntry = await validatePackageExtensionEntry({
+      packageDir: params.packageDir,
+      entry: setupEntry,
+      label: "setup entry",
+      requireExisting: false,
+    });
+    if (!sourceEntry.ok) {
+      return sourceEntry;
+    }
+
+    if (runtimeSetupEntry) {
+      const runtimeResult = await validatePackageExtensionEntry({
+        packageDir: params.packageDir,
+        entry: runtimeSetupEntry,
+        label: "runtime setup entry",
+        requireExisting: true,
+      });
+      if (!runtimeResult.ok) {
+        return runtimeResult;
+      }
+      return { ok: true };
+    }
+
+    if (sourceEntry.exists) {
+      return { ok: true };
+    }
+
+    let foundBuiltSetupEntry = false;
+    for (const builtEntry of listBuiltRuntimeEntryCandidates(setupEntry)) {
+      const builtResult = await validatePackageExtensionEntry({
+        packageDir: params.packageDir,
+        entry: builtEntry,
+        label: "inferred runtime setup entry",
+        requireExisting: false,
+      });
+      if (!builtResult.ok) {
+        return builtResult;
+      }
+      if (builtResult.exists) {
+        foundBuiltSetupEntry = true;
+        break;
+      }
+    }
+    if (!foundBuiltSetupEntry) {
+      return { ok: false, error: `setup entry not found: ${setupEntry}` };
+    }
+  }
+
   return { ok: true };
 }
 
@@ -307,6 +365,7 @@ function resolvePackageRuntimeEntrySource(params: {
   packageRootRealPath?: string;
   entryPath: string;
   runtimeEntryPath?: string;
+  runtimeEntryLabel?: string;
   origin: PluginOrigin;
   sourceLabel: string;
   diagnostics: PluginDiagnostic[];
@@ -340,6 +399,12 @@ function resolvePackageRuntimeEntrySource(params: {
     if (runtimeSource) {
       return runtimeSource;
     }
+    params.diagnostics.push({
+      level: "error",
+      message: `${params.runtimeEntryLabel ?? "runtime entry"} not found: ${params.runtimeEntryPath}`,
+      source: params.sourceLabel,
+    });
+    return null;
   }
 
   if (shouldInferBuiltRuntimeEntry(params.origin)) {
@@ -397,6 +462,7 @@ export function resolvePackageSetupSource(params: {
       : {}),
     entryPath: setupEntryPath,
     runtimeEntryPath: normalizeOptionalString(packageManifest?.runtimeSetupEntry),
+    runtimeEntryLabel: "runtime setup entry",
     origin: params.origin,
     sourceLabel: params.sourceLabel,
     diagnostics: params.diagnostics,
@@ -435,6 +501,7 @@ export function resolvePackageRuntimeExtensionSources(params: {
         : {}),
       entryPath,
       runtimeEntryPath: runtimeResolution.runtimeExtensions[index],
+      runtimeEntryLabel: "runtime extension entry",
       origin: params.origin,
       sourceLabel: params.sourceLabel,
       diagnostics: params.diagnostics,