diff --git a/script/sync-lazyclaudecode-marketplace.test.ts b/script/sync-lazyclaudecode-marketplace.test.ts
new file mode 100644
index 000000000..3ff599e2c
--- /dev/null
+++ b/script/sync-lazyclaudecode-marketplace.test.ts
@@ -0,0 +1,170 @@
+/// <reference types="bun-types" />
+
+import { describe, expect, test } from "bun:test"
+import { mkdir, mkdtemp, readFile, stat, writeFile } from "node:fs/promises"
+import { tmpdir } from "node:os"
+import { dirname, join } from "node:path"
+import { syncLazyclaudecodeMarketplace } from "./sync-lazyclaudecode-marketplace"
+
+async function writeJson(path: string, value: unknown): Promise<void> {
+  await mkdir(dirname(path), { recursive: true })
+  await writeFile(path, `${JSON.stringify(value, null, 2)}\n`)
+}
+
+async function writeText(path: string, text: string): Promise<void> {
+  await mkdir(dirname(path), { recursive: true })
+  await writeFile(path, text)
+}
+
+interface PluginFixtureOptions {
+  readonly marketplaceName?: string
+  readonly pluginName?: string
+}
+
+async function writePluginFixture(sourceRoot: string, options: PluginFixtureOptions = {}): Promise<void> {
+  const marketplaceName = options.marketplaceName ?? "sisyphuslabs"
+  const pluginName = options.pluginName ?? "omo"
+  const pluginRoot = join(sourceRoot, "packages", "omo-claude", "plugin")
+
+  await writeJson(join(sourceRoot, "packages", "omo-claude", "marketplace.json"), {
+    name: marketplaceName,
+    owner: { name: "Yeongyu Kim", url: "https://github.com/code-yeongyu" },
+    plugins: [{ name: pluginName, source: "./plugins/omo" }],
+  })
+  await writeJson(join(pluginRoot, ".claude-plugin", "plugin.json"), {
+    name: pluginName,
+    version: "1.2.3",
+  })
+
+  // Runtime artifacts that MUST be shipped.
+  await writeText(join(pluginRoot, "README.md"), "omo\n")
+  await writeJson(join(pluginRoot, ".mcp.json"), { mcpServers: {} })
+  await writeText(join(pluginRoot, "hooks", "hooks.json"), "{}\n")
+  await writeText(join(pluginRoot, "skills", "demo", "SKILL.md"), "# demo\n")
+  await writeText(join(pluginRoot, "agents", "planner.md"), "# planner\n")
+  await writeText(join(pluginRoot, "components", "rules", "dist", "cli.js"), "// built\n")
+  await writeText(join(pluginRoot, "mcp", "ast-grep", "cli.js"), "// mcp\n")
+
+  // Entries that MUST be excluded by the copy filter.
+  await writeText(join(pluginRoot, "node_modules", "ignored", "file.txt"), "ignored\n")
+  await writeText(join(pluginRoot, "components", "rules", "src", "cli.ts"), "// source\n")
+  await writeText(join(pluginRoot, "components", "rules", "tsconfig.build.json"), "{}\n")
+  await writeText(join(pluginRoot, "components", "rules", "test", "cli.test.ts"), "// test\n")
+  await writeText(join(pluginRoot, "src", "index.ts"), "// source\n")
+  await writeText(join(pluginRoot, "test", "smoke.test.ts"), "// test\n")
+  await writeText(join(pluginRoot, "tsconfig.json"), "{}\n")
+  await writeText(join(pluginRoot, ".omo", "ultragoal", "state.json"), "{}\n")
+}
+
+async function exists(path: string): Promise<boolean> {
+  try {
+    await stat(path)
+    return true
+  } catch {
+    return false
+  }
+}
+
+describe("sync-lazyclaudecode-marketplace", () => {
+  test("reads .claude-plugin/plugin.json and writes .claude-plugin/marketplace.json into the dest", async () => {
+    // given
+    const sourceRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-source-"))
+    const lazyclaudecodeRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-dest-"))
+    await writePluginFixture(sourceRoot)
+
+    // when
+    await syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })
+
+    // then — destination marketplace at the CC path
+    const marketplace = JSON.parse(
+      await readFile(join(lazyclaudecodeRoot, ".claude-plugin", "marketplace.json"), "utf8"),
+    )
+    expect(marketplace.name).toBe("sisyphuslabs")
+    expect(marketplace.plugins[0].source).toBe("./plugins/omo")
+
+    // the plugin manifest came from .claude-plugin/plugin.json and landed under plugins/omo
+    const manifest = JSON.parse(
+      await readFile(join(lazyclaudecodeRoot, "plugins", "omo", ".claude-plugin", "plugin.json"), "utf8"),
+    )
+    expect(manifest).toMatchObject({ name: "omo", version: "1.2.3" })
+
+    // NOT the codex dest path
+    expect(await exists(join(lazyclaudecodeRoot, ".agents", "plugins", "marketplace.json"))).toBe(false)
+  })
+
+  test("ships runtime artifacts into plugins/omo", async () => {
+    // given
+    const sourceRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-source-"))
+    const lazyclaudecodeRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-dest-"))
+    await writePluginFixture(sourceRoot)
+
+    // when
+    await syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })
+
+    // then
+    const pluginDest = join(lazyclaudecodeRoot, "plugins", "omo")
+    expect(await exists(join(pluginDest, ".mcp.json"))).toBe(true)
+    expect(await exists(join(pluginDest, "hooks", "hooks.json"))).toBe(true)
+    expect(await exists(join(pluginDest, "skills", "demo", "SKILL.md"))).toBe(true)
+    expect(await exists(join(pluginDest, "agents", "planner.md"))).toBe(true)
+    expect(await exists(join(pluginDest, "components", "rules", "dist", "cli.js"))).toBe(true)
+    expect(await exists(join(pluginDest, "mcp", "ast-grep", "cli.js"))).toBe(true)
+  })
+
+  test("copy filter excludes node_modules, src/, test/, tsconfig*.json, and .omo/", async () => {
+    // given
+    const sourceRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-source-"))
+    const lazyclaudecodeRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-dest-"))
+    await writePluginFixture(sourceRoot)
+
+    // when
+    await syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })
+
+    // then
+    const pluginDest = join(lazyclaudecodeRoot, "plugins", "omo")
+    expect(await exists(join(pluginDest, "node_modules"))).toBe(false)
+    expect(await exists(join(pluginDest, "src"))).toBe(false)
+    expect(await exists(join(pluginDest, "test"))).toBe(false)
+    expect(await exists(join(pluginDest, "tsconfig.json"))).toBe(false)
+    expect(await exists(join(pluginDest, ".omo"))).toBe(false)
+    // nested src/test/tsconfig under a component are excluded too
+    expect(await exists(join(pluginDest, "components", "rules", "src"))).toBe(false)
+    expect(await exists(join(pluginDest, "components", "rules", "test"))).toBe(false)
+    expect(await exists(join(pluginDest, "components", "rules", "tsconfig.build.json"))).toBe(false)
+  })
+
+  test("throws when the marketplace name is not sisyphuslabs", async () => {
+    // given
+    const sourceRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-source-"))
+    const lazyclaudecodeRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-dest-"))
+    await writePluginFixture(sourceRoot, { marketplaceName: "wrong" })
+
+    // when / then
+    await expect(syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })).rejects.toThrow("sisyphuslabs")
+  })
+
+  test("throws when the plugin name is not omo", async () => {
+    // given
+    const sourceRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-source-"))
+    const lazyclaudecodeRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-dest-"))
+    await writePluginFixture(sourceRoot, { pluginName: "not-omo" })
+
+    // when / then
+    await expect(syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })).rejects.toThrow("omo")
+  })
+
+  test("throws when the .claude-plugin/plugin.json manifest is missing", async () => {
+    // given
+    const sourceRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-source-"))
+    const lazyclaudecodeRoot = await mkdtemp(join(tmpdir(), "omo-claude-sync-dest-"))
+    await writeJson(join(sourceRoot, "packages", "omo-claude", "marketplace.json"), {
+      name: "sisyphuslabs",
+      plugins: [{ name: "omo", source: "./plugins/omo" }],
+    })
+
+    // when / then
+    await expect(syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })).rejects.toThrow(
+      ".claude-plugin/plugin.json",
+    )
+  })
+})
diff --git a/script/sync-lazyclaudecode-marketplace.ts b/script/sync-lazyclaudecode-marketplace.ts
new file mode 100644
index 000000000..3f917a064
--- /dev/null
+++ b/script/sync-lazyclaudecode-marketplace.ts
@@ -0,0 +1,112 @@
+import { cp, mkdir, readFile, rm, stat, writeFile } from "node:fs/promises"
+import { dirname, join, resolve, sep } from "node:path"
+
+const MARKETPLACE_SOURCE_PATH = join("packages", "omo-claude", "marketplace.json")
+const PLUGIN_SOURCE_PATH = join("packages", "omo-claude", "plugin")
+const MARKETPLACE_DESTINATION_PATH = join(".claude-plugin", "marketplace.json")
+const PLUGIN_DESTINATION_PATH = join("plugins", "omo")
+
+export interface SyncLazyclaudecodeMarketplaceInput {
+  readonly sourceRoot: string
+  readonly lazyclaudecodeRoot: string
+}
+
+interface MarketplaceManifest {
+  readonly name: string
+}
+
+interface PluginManifest {
+  readonly name: string
+  readonly version?: string
+}
+
+export async function syncLazyclaudecodeMarketplace(input: SyncLazyclaudecodeMarketplaceInput): Promise<void> {
+  const sourceRoot = resolve(input.sourceRoot)
+  const lazyclaudecodeRoot = resolve(input.lazyclaudecodeRoot)
+  const marketplacePath = join(sourceRoot, MARKETPLACE_SOURCE_PATH)
+  const pluginRoot = join(sourceRoot, PLUGIN_SOURCE_PATH)
+  const pluginManifestPath = join(pluginRoot, ".claude-plugin", "plugin.json")
+
+  const marketplace = await readMarketplaceManifest(marketplacePath)
+  if (marketplace.name !== "sisyphuslabs") {
+    throw new Error(`Sisyphus Labs marketplace manifest must be named sisyphuslabs, got ${marketplace.name}`)
+  }
+
+  const pluginManifest = await readPluginManifest(pluginManifestPath)
+  if (pluginManifest.name !== "omo") {
+    throw new Error(`Sisyphus Labs plugin manifest must be named omo, got ${pluginManifest.name}`)
+  }
+
+  const destinationMarketplacePath = join(lazyclaudecodeRoot, MARKETPLACE_DESTINATION_PATH)
+  await mkdir(dirname(destinationMarketplacePath), { recursive: true })
+  await writeFile(destinationMarketplacePath, await readFile(marketplacePath, "utf8"))
+
+  const destinationPluginRoot = join(lazyclaudecodeRoot, PLUGIN_DESTINATION_PATH)
+  await rm(destinationPluginRoot, { recursive: true, force: true })
+  await mkdir(dirname(destinationPluginRoot), { recursive: true })
+  await cp(pluginRoot, destinationPluginRoot, {
+    recursive: true,
+    filter: (path) => shouldCopyPluginPath(path, pluginRoot),
+  })
+}
+
+async function readMarketplaceManifest(path: string): Promise<MarketplaceManifest> {
+  const parsed = JSON.parse(await readFile(path, "utf8"))
+  if (isRecord(parsed) && typeof parsed.name === "string") {
+    return { name: parsed.name }
+  }
+  throw new Error("invalid Sisyphus Labs marketplace manifest")
+}
+
+async function readPluginManifest(path: string): Promise<PluginManifest> {
+  if (!(await isFile(path))) {
+    throw new Error(`missing Claude Code plugin manifest at .claude-plugin/plugin.json (${path})`)
+  }
+  const parsed = JSON.parse(await readFile(path, "utf8"))
+  if (isRecord(parsed) && typeof parsed.name === "string") {
+    return {
+      name: parsed.name,
+      version: typeof parsed.version === "string" ? parsed.version : undefined,
+    }
+  }
+  throw new Error("invalid Claude Code plugin manifest")
+}
+
+async function isFile(path: string): Promise<boolean> {
+  try {
+    return (await stat(path)).isFile()
+  } catch (error) {
+    if (error instanceof Error) return false
+    return false
+  }
+}
+
+function shouldCopyPluginPath(path: string, root: string): boolean {
+  const relative = path === root ? "" : path.slice(root.length + sep.length)
+  if (relative.length === 0) return true
+  return !relative.split(sep).some(isExcludedPathPart)
+}
+
+function isExcludedPathPart(part: string): boolean {
+  if (part === ".git" || part === "node_modules") return true
+  if (part === "src" || part === "test") return true
+  if (part === ".omo") return true
+  return isTsconfigFile(part)
+}
+
+function isTsconfigFile(part: string): boolean {
+  return part.startsWith("tsconfig") && part.endsWith(".json")
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value)
+}
+
+if (import.meta.main) {
+  const sourceRoot = process.argv[2] ?? process.cwd()
+  const lazyclaudecodeRoot = process.argv[3]
+  if (lazyclaudecodeRoot === undefined) {
+    throw new Error("Usage: bun run script/sync-lazyclaudecode-marketplace.ts <source-root> <lazyclaudecode-root>")
+  }
+  await syncLazyclaudecodeMarketplace({ sourceRoot, lazyclaudecodeRoot })
+}
diff --git a/script/tsconfig.json b/script/tsconfig.json
index 4c78bbbfb..7f607b856 100644
--- a/script/tsconfig.json
+++ b/script/tsconfig.json
@@ -11,5 +11,5 @@
     "allowImportingTsExtensions": true,
     "noEmit": true
   },
-  "include": ["./publish-workflow.test.ts", "./package-layout.test.ts", "./sync-lazycodex-marketplace.ts", "./sync-lazycodex-marketplace.test.ts"]
+  "include": ["./publish-workflow.test.ts", "./package-layout.test.ts", "./sync-lazycodex-marketplace.ts", "./sync-lazycodex-marketplace.test.ts", "./sync-lazyclaudecode-marketplace.ts", "./sync-lazyclaudecode-marketplace.test.ts"]
 }