diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba80cf4d4fc1..3068d8388b6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,8 @@ Docs: https://docs.openclaw.ai
 
 - Installer: let the local-prefix CLI installer use Alpine's `apk` Node.js, npm, and Git packages on musl Linux instead of downloading glibc Node tarballs that fail `node:sqlite`.
 - Scripts: use `git grep` to prefilter tracked conflict-marker scans so changed checks avoid reading every repository file on clean runs.
+- Plugins: allow linked local plugin paths to probe TypeScript source entries without requiring compiled package output, restoring source-checkout plugin development on native Windows.
+- CLI: route source-checkout build output to stderr before launching OpenClaw commands so stale local builds do not corrupt `--json` stdout.
 - Installer: install Node.js through `apk` on Alpine Linux instead of falling through to the NodeSource package-manager path.
 - Agents/perf: cache manifest-backed CLI provider descriptors and fallback provider resolution so model fallback retries avoid repeated bundled provider runtime scans while still invalidating across plugin reloads.
 - Installer: detect musl Linux shells such as Alpine as Linux instead of rejecting them before npm install.
diff --git a/scripts/run-node.mjs b/scripts/run-node.mjs
index 793f8d14f627..38b66341d58c 100644
--- a/scripts/run-node.mjs
+++ b/scripts/run-node.mjs
@@ -647,6 +647,28 @@ const createRunNodeOutputTee = (deps) => {
   if (!outputLogPath) {
     return null;
   }
+  try {
+    const existing = deps.fs.statSync(outputLogPath);
+    if (existing.isDirectory()) {
+      return {
+        outputLogPath,
+        write() {},
+        async close() {
+          throw new Error(`output log path is a directory: ${outputLogPath}`);
+        },
+      };
+    }
+  } catch (error) {
+    if (error?.code && error.code !== "ENOENT") {
+      return {
+        outputLogPath,
+        write() {},
+        async close() {
+          throw error;
+        },
+      };
+    }
+  }
   deps.fs.mkdirSync(path.dirname(outputLogPath), { recursive: true });
   const stream = deps.fs.createWriteStream(outputLogPath, {
     flags: "a",
@@ -936,8 +958,9 @@ const runOpenClaw = async (deps) => {
   return res.exitCode ?? 1;
 };
 
-const pipeSpawnedOutput = (childProcess, deps) => {
-  if (!shouldPipeSpawnedOutput(deps)) {
+const pipeSpawnedOutput = (childProcess, deps, options = {}) => {
+  const stdoutTarget = options.stdoutTarget ?? "stdout";
+  if (!shouldPipeSpawnedOutput(deps) && stdoutTarget !== "stderr") {
     return;
   }
   const stderrFilter =
@@ -945,7 +968,8 @@ const pipeSpawnedOutput = (childProcess, deps) => {
       ? createSyncIoTraceStderrFilter(deps)
       : null;
   childProcess.stdout?.on("data", (chunk) => {
-    writeRunnerStream(deps, deps.stdout, chunk);
+    const target = stdoutTarget === "stderr" ? deps.stderr : deps.stdout;
+    writeRunnerStream(deps, target, chunk);
     deps.outputTee?.write(chunk);
   });
   childProcess.stderr?.on("data", (chunk) => {
@@ -1389,9 +1413,9 @@ export async function runNodeMain(params = {}) {
           const assetBuild = deps.spawn(buildCmd, bundledPluginAssetBuildArgs, {
             cwd: deps.cwd,
             env: deps.env,
-            stdio: shouldPipeSpawnedOutput(deps) ? ["inherit", "pipe", "pipe"] : "inherit",
+            stdio: ["inherit", "pipe", "pipe"],
           });
-          pipeSpawnedOutput(assetBuild, deps);
+          pipeSpawnedOutput(assetBuild, deps, { stdoutTarget: "stderr" });
           const assetBuildRes = await waitForSpawnedProcess(assetBuild, deps);
           const assetBuildInterruptedExitCode = getInterruptedSpawnExitCode(assetBuildRes);
           if (assetBuildInterruptedExitCode !== null) {
@@ -1407,9 +1431,9 @@ export async function runNodeMain(params = {}) {
               ...deps.env,
               [RUN_NODE_SKIP_DTS_BUILD_ENV]: deps.env[RUN_NODE_SKIP_DTS_BUILD_ENV] ?? "1",
             },
-            stdio: shouldPipeSpawnedOutput(deps) ? ["inherit", "pipe", "pipe"] : "inherit",
+            stdio: ["inherit", "pipe", "pipe"],
           });
-          pipeSpawnedOutput(build, deps);
+          pipeSpawnedOutput(build, deps, { stdoutTarget: "stderr" });
 
           const buildRes = await waitForSpawnedProcess(build, deps);
           const interruptedExitCode = getInterruptedSpawnExitCode(buildRes);
diff --git a/src/cli/plugins-cli.install.test.ts b/src/cli/plugins-cli.install.test.ts
index 904c3d08d904..a87a23cf021e 100644
--- a/src/cli/plugins-cli.install.test.ts
+++ b/src/cli/plugins-cli.install.test.ts
@@ -302,6 +302,7 @@ type MockWithCalls = {
 };
 
 type PluginInstallCall = {
+  allowSourceTypeScriptEntries?: boolean;
   archivePath?: string;
   dangerouslyForceUnsafeInstall?: boolean;
   dryRun?: boolean;
@@ -1321,6 +1322,7 @@ describe("plugins cli install", () => {
 
     expect(pathInstallCall().path).toBe(tmpRoot);
     expect(pathInstallCall().dryRun).toBe(true);
+    expect(pathInstallCall().allowSourceTypeScriptEntries).toBe(true);
     expect(pathInstallCall().dangerouslyForceUnsafeInstall).toBe(true);
   });
 
@@ -1536,6 +1538,7 @@ describe("plugins cli install", () => {
 
     expect(pathInstallCall().path).toBe(localPluginDir);
     expect(pathInstallCall().dryRun).toBe(true);
+    expect(pathInstallCall().allowSourceTypeScriptEntries).toBe(true);
     expect(pathInstallCall().dangerouslyForceUnsafeInstall).toBe(true);
     expect(typeof pathInstallCall().logger?.info).toBe("function");
     expect(typeof pathInstallCall().logger?.warn).toBe("function");
diff --git a/src/cli/plugins-install-command.ts b/src/cli/plugins-install-command.ts
index 0ee21bd3c159..439000e39c7b 100644
--- a/src/cli/plugins-install-command.ts
+++ b/src/cli/plugins-install-command.ts
@@ -693,6 +693,7 @@ export async function runPluginInstallCommand(params: {
         mode: installMode,
         path: resolved,
         dryRun: true,
+        allowSourceTypeScriptEntries: true,
         extensionsDir,
         logger: createPluginInstallLogger(runtime),
       });
diff --git a/src/infra/run-node.test.ts b/src/infra/run-node.test.ts
index 54190851c8f1..f717d9bc9850 100644
--- a/src/infra/run-node.test.ts
+++ b/src/infra/run-node.test.ts
@@ -559,6 +559,68 @@ describe("run-node script", () => {
     });
   });
 
+  it("routes local build stdout to stderr before JSON command output", async () => {
+    await withTempDir({ prefix: "openclaw-run-node-" }, async (tmp) => {
+      await writeRuntimePostBuildScaffold(tmp);
+      const outputPath = path.join(tmp, ".artifacts", "run-node", "output.log");
+      const spawn = (_cmd: string, args: string[]) => {
+        if (args[0] === "scripts/bundled-plugin-assets.mjs") {
+          return createPipedExitedProcess({
+            stdout: "asset stdout\n",
+            stderr: "asset stderr\n",
+          });
+        }
+        if (args[0] === "scripts/tsdown-build.mjs") {
+          return createPipedExitedProcess({
+            stdout: "build stdout\n",
+            stderr: "build stderr\n",
+          });
+        }
+        return createPipedExitedProcess({ stdout: '{"plugins":[]}\n' });
+      };
+      const stdoutChunks: string[] = [];
+      const stderrChunks: string[] = [];
+      const stdout = {
+        write: (chunk: string | Buffer) => {
+          stdoutChunks.push(String(chunk));
+          return true;
+        },
+      } as unknown as NodeJS.WriteStream;
+      const stderr = {
+        write: (chunk: string | Buffer) => {
+          stderrChunks.push(String(chunk));
+          return true;
+        },
+      } as unknown as NodeJS.WriteStream;
+
+      const exitCode = await runNodeMain({
+        cwd: tmp,
+        args: ["plugins", "list", "--json"],
+        env: {
+          ...process.env,
+          OPENCLAW_FORCE_BUILD: "1",
+          OPENCLAW_RUNNER_LOG: "0",
+          OPENCLAW_RUN_NODE_OUTPUT_LOG: outputPath,
+        },
+        spawn,
+        stdout,
+        stderr,
+        execPath: process.execPath,
+        platform: process.platform,
+      } as Parameters<typeof runNodeMain>[0] & {
+        stdout: NodeJS.WriteStream;
+        stderr: NodeJS.WriteStream;
+      });
+
+      expect(exitCode).toBe(0);
+      expect(stdoutChunks.join("")).toBe('{"plugins":[]}\n');
+      expect(stderrChunks.join("")).toContain("asset stdout\n");
+      expect(stderrChunks.join("")).toContain("asset stderr\n");
+      expect(stderrChunks.join("")).toContain("build stdout\n");
+      expect(stderrChunks.join("")).toContain("build stderr\n");
+    });
+  });
+
   it("routes sync I/O trace stderr blocks to the output log without flooding stderr", async () => {
     await withTempDir({ prefix: "openclaw-run-node-" }, async (tmp) => {
       await setupTrackedProject(tmp);
diff --git a/src/plugins/discovery.test.ts b/src/plugins/discovery.test.ts
index 3aed8f10fae4..1342e5589051 100644
--- a/src/plugins/discovery.test.ts
+++ b/src/plugins/discovery.test.ts
@@ -879,6 +879,45 @@ describe("discoverOpenClawPlugins", () => {
     });
   });
 
+  it("allows linked local install records to point at TypeScript source entries", async () => {
+    const stateDir = makeTempDir();
+    const pluginDir = path.join(stateDir, "extensions", "linked-source-pack");
+    mkdirSafe(path.join(pluginDir, "src"));
+
+    writePluginPackageManifest({
+      packageDir: pluginDir,
+      packageName: "@openclaw/linked-source-pack",
+      extensions: ["./src/index.ts"],
+      setupEntry: "./src/setup-entry.ts",
+    });
+    writePluginManifest({ pluginDir, id: "linked-source-pack" });
+    writePluginEntry(path.join(pluginDir, "src", "index.ts"));
+    writePluginEntry(path.join(pluginDir, "src", "setup-entry.ts"));
+
+    const installRecords = {
+      "linked-source-pack": {
+        source: "path",
+        installPath: pluginDir,
+        sourcePath: pluginDir,
+      },
+    } satisfies Record<string, PluginInstallRecord>;
+    const result = await discoverWithStateDir(stateDir, { installRecords });
+
+    expectCandidateSource(
+      result.candidates,
+      "linked-source-pack",
+      fs.realpathSync(path.join(pluginDir, "src", "index.ts")),
+    );
+    expectCandidateFields(requireCandidateById(result.candidates, "linked-source-pack"), {
+      setupSource: fs.realpathSync(path.join(pluginDir, "src", "setup-entry.ts")),
+    });
+    expectNoDiagnostic({
+      diagnostics: result.diagnostics,
+      pluginId: "linked-source-pack",
+      messageIncludes: "requires compiled runtime output",
+    });
+  });
+
   it("still requires compiled runtime output for tracked installed package plugins", async () => {
     const stateDir = makeTempDir();
     const pluginDir = path.join(stateDir, "extensions", "source-only-pack");
diff --git a/src/plugins/discovery.ts b/src/plugins/discovery.ts
index b2429ef38329..1437836a4493 100644
--- a/src/plugins/discovery.ts
+++ b/src/plugins/discovery.ts
@@ -389,11 +389,40 @@ function mergeDiscoveryResult(
   }
 }
 
+type InstalledPluginRecordPath = {
+  path: string;
+  requireBuiltRuntimeEntry: boolean;
+};
+
+function isLinkedLocalPluginRecord(params: {
+  record: PluginInstallRecord;
+  env: NodeJS.ProcessEnv;
+  realpathCache: Map<string, string>;
+}): boolean {
+  if (params.record.source !== "path") {
+    return false;
+  }
+  if (
+    typeof params.record.sourcePath !== "string" ||
+    !params.record.sourcePath.trim() ||
+    typeof params.record.installPath !== "string" ||
+    !params.record.installPath.trim()
+  ) {
+    return false;
+  }
+  return resolvesToSameDirectory(
+    resolveUserPath(params.record.sourcePath, params.env),
+    resolveUserPath(params.record.installPath, params.env),
+    params.realpathCache,
+  );
+}
+
 function collectInstalledPluginRecordPaths(
   installRecords: Record<string, PluginInstallRecord> | undefined,
   env: NodeJS.ProcessEnv,
-): string[] {
-  const paths: string[] = [];
+  realpathCache: Map<string, string>,
+): InstalledPluginRecordPath[] {
+  const paths: InstalledPluginRecordPath[] = [];
   const seen = new Set<string>();
   for (const record of Object.values(installRecords ?? {})) {
     const rawPath =
@@ -410,7 +439,10 @@ function collectInstalledPluginRecordPaths(
       continue;
     }
     seen.add(resolved);
-    paths.push(resolved);
+    paths.push({
+      path: resolved,
+      requireBuiltRuntimeEntry: !isLinkedLocalPluginRecord({ record, env, realpathCache }),
+    });
   }
   return paths;
 }
@@ -1380,19 +1412,26 @@ export function discoverOpenClawPlugins(params: {
           skipDirectories: readChildDirectoryNames(roots.stock),
         });
       }
-      const installedPaths = collectInstalledPluginRecordPaths(params.installRecords, env);
-      const installedPluginDirKeys = collectManagedPluginDirKeys(installedPaths, realpathCache);
+      const installedPaths = collectInstalledPluginRecordPaths(
+        params.installRecords,
+        env,
+        realpathCache,
+      );
+      const installedPluginDirKeys = collectManagedPluginDirKeys(
+        installedPaths.map((installedPath) => installedPath.path),
+        realpathCache,
+      );
       const managedPluginDirs = collectManagedPluginDirKeys(
         collectManagedPluginRecordPaths(params.installRecords, env),
         realpathCache,
       );
       for (const installedPath of installedPaths) {
         discoverFromPath({
-          rawPath: installedPath,
+          rawPath: installedPath.path,
           origin: "global",
           ownershipUid: params.ownershipUid,
           workspaceDir,
-          requireBuiltRuntimeEntry: true,
+          requireBuiltRuntimeEntry: installedPath.requireBuiltRuntimeEntry,
           managedPluginDirs,
           env,
           candidates: result.candidates,
diff --git a/src/plugins/install.test.ts b/src/plugins/install.test.ts
index 6f8e02b78803..fb3f8a397d58 100644
--- a/src/plugins/install.test.ts
+++ b/src/plugins/install.test.ts
@@ -293,6 +293,10 @@ function expectWarningExcludes(warnings: readonly string[], fragment: string) {
   expect(warnings.join("\n")).not.toContain(fragment);
 }
 
+function expectMessageIncludesPath(message: string, fragment: string) {
+  expect(message.replaceAll("\\", "/")).toContain(fragment);
+}
+
 function requireRecord(value: unknown, label: string): Record<string, unknown> {
   if (!value || typeof value !== "object" || Array.isArray(value)) {
     throw new Error(`expected ${label} to be an object`);
@@ -1187,6 +1191,33 @@ describe("installPluginFromArchive", () => {
     }
   });
 
+  it("allows linked source probes when TypeScript extension entries have no compiled runtime output", async () => {
+    const { pluginDir, extensionsDir } = setupPluginInstallDirs();
+    fs.mkdirSync(path.join(pluginDir, "src"), { recursive: true });
+    fs.writeFileSync(
+      path.join(pluginDir, "package.json"),
+      JSON.stringify({
+        name: "source-link-runtime-plugin",
+        version: "1.0.0",
+        openclaw: { extensions: ["./src/index.ts"] },
+      }),
+    );
+    fs.writeFileSync(path.join(pluginDir, "src", "index.ts"), "export {};\n");
+
+    const result = await installPluginFromDir({
+      dirPath: pluginDir,
+      extensionsDir,
+      dryRun: true,
+      allowSourceTypeScriptEntries: true,
+    });
+
+    if (!result.ok) {
+      throw new Error(result.error);
+    }
+    expect(result.pluginId).toBe("source-link-runtime-plugin");
+    expect(result.targetDir).toBe(resolvePluginInstallDir(result.pluginId, extensionsDir));
+  });
+
   it("rejects package installs when runtimeExtensions length does not match extensions", async () => {
     const { pluginDir, extensionsDir } = setupPluginInstallDirs();
     fs.mkdirSync(path.join(pluginDir, "dist"), { recursive: true });
@@ -1450,7 +1481,7 @@ describe("installPluginFromArchive", () => {
     expect(result.ok).toBe(false);
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
-      expect(result.error).toContain("dist/payload.js");
+      expectMessageIncludesPath(result.error, "dist/payload.js");
     }
     expectWarningIncludes(warnings, "dangerous code pattern");
   });
@@ -1601,7 +1632,7 @@ describe("installPluginFromArchive", () => {
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('blocked dependencies "plain-crypto-js" in dependencies');
-      expect(result.error).toContain("declared in axios (vendor/axios/package.json)");
+      expectMessageIncludesPath(result.error, "declared in axios (vendor/axios/package.json)");
     }
   });
 
@@ -1628,7 +1659,7 @@ describe("installPluginFromArchive", () => {
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('blocked dependency directory "plain-crypto-js"');
-      expect(result.error).toContain("vendor/node_modules/plain-crypto-js");
+      expectMessageIncludesPath(result.error, "vendor/node_modules/plain-crypto-js");
     }
   });
 
@@ -1655,7 +1686,7 @@ describe("installPluginFromArchive", () => {
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('blocked dependency file alias "Plain-Crypto-Js"');
-      expect(result.error).toContain("vendor/Node_Modules/Plain-Crypto-Js.Js");
+      expectMessageIncludesPath(result.error, "vendor/Node_Modules/Plain-Crypto-Js.Js");
     }
   });
 
@@ -1682,7 +1713,7 @@ describe("installPluginFromArchive", () => {
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('blocked dependency file alias "Plain-Crypto-Js"');
-      expect(result.error).toContain("vendor/Node_Modules/Plain-Crypto-Js");
+      expectMessageIncludesPath(result.error, "vendor/Node_Modules/Plain-Crypto-Js");
     }
   });
 
@@ -2085,7 +2116,8 @@ describe("installPluginFromArchive", () => {
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('blocked dependencies "plain-crypto-js" as package name');
-      expect(result.error).toContain(
+      expectMessageIncludesPath(
+        result.error,
         "vendor/pkg-127/node_modules/nested-safe/node_modules/plain-crypto-js/package.json",
       );
     }
@@ -2410,7 +2442,7 @@ describe("installPluginFromArchive", () => {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('Bundle "blocked-dependency-bundle" installation blocked');
       expect(result.error).toContain('blocked dependencies "plain-crypto-js" in dependencies');
-      expect(result.error).toContain("declared in axios (vendor/axios/package.json)");
+      expectMessageIncludesPath(result.error, "declared in axios (vendor/axios/package.json)");
     }
     expect(
       warnings.some((warning) =>
@@ -2442,7 +2474,8 @@ describe("installPluginFromArchive", () => {
         'Bundle "blocked-vendored-package-name-bundle" installation blocked',
       );
       expect(result.error).toContain('"plain-crypto-js" as package name');
-      expect(result.error).toContain(
+      expectMessageIncludesPath(
+        result.error,
         "declared in plain-crypto-js (vendor/plain-crypto-js/package.json)",
       );
     }
@@ -2464,7 +2497,7 @@ describe("installPluginFromArchive", () => {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('Bundle "blocked-package-dir-bundle" installation blocked');
       expect(result.error).toContain('blocked dependency directory "plain-crypto-js"');
-      expect(result.error).toContain("vendor/node_modules/plain-crypto-js");
+      expectMessageIncludesPath(result.error, "vendor/node_modules/plain-crypto-js");
     }
   });
 
@@ -2484,7 +2517,7 @@ describe("installPluginFromArchive", () => {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('Bundle "blocked-package-file-bundle" installation blocked');
       expect(result.error).toContain('blocked dependency file alias "Plain-Crypto-Js"');
-      expect(result.error).toContain("vendor/Node_Modules/Plain-Crypto-Js.Js");
+      expectMessageIncludesPath(result.error, "vendor/Node_Modules/Plain-Crypto-Js.Js");
     }
   });
 
@@ -2506,7 +2539,7 @@ describe("installPluginFromArchive", () => {
         'Bundle "blocked-package-extensionless-file-bundle" installation blocked',
       );
       expect(result.error).toContain('blocked dependency file alias "Plain-Crypto-Js"');
-      expect(result.error).toContain("vendor/Node_Modules/Plain-Crypto-Js");
+      expectMessageIncludesPath(result.error, "vendor/Node_Modules/Plain-Crypto-Js");
     }
   });
 
@@ -3111,7 +3144,7 @@ describe("installPluginFromDir", () => {
     if (!result.ok) {
       expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
       expect(result.error).toContain('blocked dependencies "plain-crypto-js" as package name');
-      expect(result.error).toContain("node_modules/plain-crypto-js/package.json");
+      expectMessageIncludesPath(result.error, "node_modules/plain-crypto-js/package.json");
     }
     expect(vi.mocked(runCommandWithTimeout)).not.toHaveBeenCalled();
   });
diff --git a/src/plugins/install.ts b/src/plugins/install.ts
index 4381412e6873..9bdec4780009 100644
--- a/src/plugins/install.ts
+++ b/src/plugins/install.ts
@@ -945,6 +945,7 @@ type PackageInstallCommonParams = InstallSafetyOverrides & {
   dryRun?: boolean;
   expectedPluginId?: string;
   requirePluginManifest?: boolean;
+  allowSourceTypeScriptEntries?: boolean;
   installPolicyRequest?: PluginInstallPolicyRequest;
 };
 
@@ -973,6 +974,7 @@ function pickPackageInstallCommonParams(
     dryRun: params.dryRun,
     expectedPluginId: params.expectedPluginId,
     requirePluginManifest: params.requirePluginManifest,
+    allowSourceTypeScriptEntries: params.allowSourceTypeScriptEntries,
     installPolicyRequest: params.installPolicyRequest,
   };
 }
@@ -1313,6 +1315,7 @@ async function validatePackagePluginInstallSource(params: {
   packageDir: string;
   expectedPluginId?: string;
   requirePluginManifest?: boolean;
+  allowSourceTypeScriptEntries?: boolean;
   dangerouslyForceUnsafeInstall?: boolean;
   trustedSourceLinkedOfficialInstall?: boolean;
   installPolicyRequest?: PluginInstallPolicyRequest;
@@ -1422,6 +1425,7 @@ async function validatePackagePluginInstallSource(params: {
     packageDir: params.packageDir,
     extensions,
     manifest,
+    allowSourceTypeScriptEntries: params.allowSourceTypeScriptEntries,
   });
   if (!extensionValidation.ok) {
     return {
@@ -1531,6 +1535,7 @@ export async function installPluginFromInstalledPackageDir(
     packageDir: params.packageDir,
     expectedPluginId: params.expectedPluginId,
     requirePluginManifest: params.requirePluginManifest,
+    allowSourceTypeScriptEntries: params.allowSourceTypeScriptEntries,
     dangerouslyForceUnsafeInstall: params.dangerouslyForceUnsafeInstall,
     trustedSourceLinkedOfficialInstall: params.trustedSourceLinkedOfficialInstall,
     installPolicyRequest: params.installPolicyRequest,
@@ -1598,6 +1603,7 @@ async function installPluginFromPackageDir(
     packageDir: params.packageDir,
     expectedPluginId: params.expectedPluginId,
     requirePluginManifest: params.requirePluginManifest,
+    allowSourceTypeScriptEntries: params.allowSourceTypeScriptEntries,
     dangerouslyForceUnsafeInstall: params.dangerouslyForceUnsafeInstall,
     trustedSourceLinkedOfficialInstall: params.trustedSourceLinkedOfficialInstall,
     installPolicyRequest: params.installPolicyRequest,
diff --git a/src/plugins/package-entry-resolution.ts b/src/plugins/package-entry-resolution.ts
index fde87d6568bd..3de2ad02e85d 100644
--- a/src/plugins/package-entry-resolution.ts
+++ b/src/plugins/package-entry-resolution.ts
@@ -142,6 +142,7 @@ export async function validatePackageExtensionEntriesForInstall(params: {
   packageDir: string;
   extensions: string[];
   manifest: PackageManifest;
+  allowSourceTypeScriptEntries?: boolean;
 }): Promise<{ ok: true } | { ok: false; error: string }> {
   const runtimeResolution = resolvePackageRuntimeExtensionEntries({
     manifest: params.manifest,
@@ -198,6 +199,14 @@ export async function validatePackageExtensionEntriesForInstall(params: {
       continue;
     }
 
+    if (
+      sourceEntry.exists &&
+      isTypeScriptPackageEntry(entry) &&
+      params.allowSourceTypeScriptEntries
+    ) {
+      continue;
+    }
+
     if (sourceEntry.exists && isTypeScriptPackageEntry(entry)) {
       return {
         ok: false,
@@ -282,6 +291,14 @@ export async function validatePackageExtensionEntriesForInstall(params: {
       return { ok: true };
     }
 
+    if (
+      sourceEntry.exists &&
+      isTypeScriptPackageEntry(setupEntry) &&
+      params.allowSourceTypeScriptEntries
+    ) {
+      return { ok: true };
+    }
+
     if (sourceEntry.exists && isTypeScriptPackageEntry(setupEntry)) {
       return {
         ok: false,