diff --git a/__tests__/diun-plugin.test.js b/__tests__/diun-plugin.test.js
new file mode 100644
index 000000000..38c541469
--- /dev/null
+++ b/__tests__/diun-plugin.test.js
@@ -0,0 +1,80 @@
+const fs = require("fs")
+const os = require("os")
+const path = require("path")
+const { execSync } = require("child_process")
+
+const CLI = path.join(__dirname, "..", "cli", "supercli.js")
+
+function runNoServer(args, options = {}) {
+  try {
+    const env = { ...process.env }
+    delete env.SUPERCLI_SERVER
+    const out = execSync(`node ${CLI} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeDiunBinary(dir) {
+  const bin = path.join(dir, "diun")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args[0] === 'version') { console.log('diun version 4.28.0-test'); process.exit(0); }",
+    "if (args[0] === 'check-config') { console.log('configuration is valid'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("diun plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-diun-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-diun-"))
+  writeFakeDiunBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    runNoServer("plugins install ./plugins/diun --on-conflict replace --json", { env })
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove diun --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("routes version command as raw text", () => {
+    const r = runNoServer("diun self version --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("diun.self.version")
+    expect(data.data.raw).toBe("diun version 4.28.0-test")
+  })
+
+  test("routes check-config command as raw text", () => {
+    const r = runNoServer("diun self check-config --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("diun.self.check-config")
+    expect(data.data.raw).toBe("configuration is valid")
+  })
+
+  test("doctor reports diun binary dependency as healthy", () => {
+    const r = runNoServer("plugins doctor diun --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.ok).toBe(true)
+    expect(data.checks.some(c => c.type === "binary" && c.binary === "diun" && c.ok === true)).toBe(true)
+  })
+})
diff --git a/__tests__/notion-cli-plugin.test.js b/__tests__/notion-cli-plugin.test.js
new file mode 100644
index 000000000..c1a3ce295
--- /dev/null
+++ b/__tests__/notion-cli-plugin.test.js
@@ -0,0 +1,98 @@
+const fs = require("fs")
+const os = require("os")
+const path = require("path")
+const { execSync } = require("child_process")
+
+const CLI = path.join(__dirname, "..", "cli", "supercli.js")
+
+function runNoServer(args, options = {}) {
+  try {
+    const env = { ...process.env }
+    delete env.SUPERCLI_SERVER
+    const out = execSync(`node ${CLI} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeNotionBinary(dir) {
+  const bin = path.join(dir, "notion")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args[0] === '--version') { console.log('notion 0.1.0-test'); process.exit(0); }",
+    "if (args[0] === 'search') { console.log(JSON.stringify({ results: [{ id: 'p1', title: 'Hello' }] })); process.exit(0); }",
+    "if (args[0] === 'db' && args[1] === 'list') { console.log(JSON.stringify({ databases: [{ id: 'db1', title: 'Tasks' }] })); process.exit(0); }",
+    "if (args[0] === 'page' && args[1] === 'list') { console.log(JSON.stringify({ pages: [{ id: 'pg1', title: 'Note' }] })); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("notion-cli plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-notion-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-notion-"))
+  writeFakeNotionBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    runNoServer("plugins install ./plugins/notion-cli --on-conflict replace --json", { env })
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove notion-cli --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("routes version command as raw text", () => {
+    const r = runNoServer("notion self version --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("notion.self.version")
+    expect(data.data.raw).toBe("notion 0.1.0-test")
+  })
+
+  test("routes search with positional query", () => {
+    const r = runNoServer('notion search run "Hello" --json', { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("notion.search.run")
+    expect(data.data.results[0].id).toBe("p1")
+  })
+
+  test("routes db list as parsed json", () => {
+    const r = runNoServer("notion db list --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("notion.db.list")
+    expect(data.data.databases[0].title).toBe("Tasks")
+  })
+
+  test("routes page list as parsed json", () => {
+    const r = runNoServer("notion page list --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("notion.page.list")
+    expect(data.data.pages[0].id).toBe("pg1")
+  })
+
+  test("doctor reports notion binary dependency as healthy", () => {
+    const r = runNoServer("plugins doctor notion-cli --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.ok).toBe(true)
+    expect(data.checks.some(c => c.type === "binary" && c.binary === "notion" && c.ok === true)).toBe(true)
+  })
+})
diff --git a/__tests__/slim-plugin.test.js b/__tests__/slim-plugin.test.js
new file mode 100644
index 000000000..c022dc775
--- /dev/null
+++ b/__tests__/slim-plugin.test.js
@@ -0,0 +1,91 @@
+const fs = require("fs")
+const os = require("os")
+const path = require("path")
+const { execSync } = require("child_process")
+
+const CLI = path.join(__dirname, "..", "cli", "supercli.js")
+
+function runNoServer(args, options = {}) {
+  try {
+    const env = { ...process.env }
+    delete env.SUPERCLI_SERVER
+    const out = execSync(`node ${CLI} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeSlimBinary(dir) {
+  const bin = path.join(dir, "slim")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args[0] === 'version') { console.log('slim version 1.40.0-test'); process.exit(0); }",
+    "if (args[0] === 'xray') { console.log(JSON.stringify({ target: args[1], layers: [{ index: 0, size: 1024 }] })); process.exit(0); }",
+    "if (args[0] === 'lint') { console.log(JSON.stringify({ target: args[1], findings: [{ rule: 'ID.SHELL', level: 'info' }] })); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("slim plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-slim-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-slim-"))
+  writeFakeSlimBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    runNoServer("plugins install ./plugins/slim --on-conflict replace --json", { env })
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove slim --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("routes version command as raw text", () => {
+    const r = runNoServer("slim self version --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("slim.self.version")
+    expect(data.data.raw).toBe("slim version 1.40.0-test")
+  })
+
+  test("routes xray with positional target", () => {
+    const r = runNoServer("slim image xray nginx:latest --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("slim.image.xray")
+    // xray declares parseJson:false, so the tool output is returned verbatim as raw
+    expect(data.data.raw).toContain("nginx:latest")
+    expect(JSON.parse(data.data.raw).layers[0].size).toBe(1024)
+  })
+
+  test("routes dockerfile lint with positional target", () => {
+    const r = runNoServer("slim dockerfile lint ./Dockerfile --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("slim.dockerfile.lint")
+    expect(data.data.raw).toContain("ID.SHELL")
+  })
+
+  test("doctor reports slim binary dependency as healthy", () => {
+    const r = runNoServer("plugins doctor slim --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.ok).toBe(true)
+    expect(data.checks.some(c => c.type === "binary" && c.binary === "slim" && c.ok === true)).toBe(true)
+  })
+})