diff --git a/__tests__/dar-plugin.test.js b/__tests__/dar-plugin.test.js
new file mode 100644
index 000000000..7003c4157
--- /dev/null
+++ b/__tests__/dar-plugin.test.js
@@ -0,0 +1,73 @@
+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} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeDarBinary(dir) {
+  const bin = path.join(dir, "dar")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args.includes('--version')) { console.log('dar 2.7.13-test'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("dar plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-dar-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-dar-"))
+  writeFakeDarBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    const install = runNoServer("plugins install ./plugins/dar --on-conflict replace --json", { env })
+    expect(install.ok).toBe(true)
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove dar --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("supports namespace passthrough", () => {
+    const r = runNoServer("dar --create backup --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("dar.passthrough")
+    expect(data.data.args).toContain("--create")
+    expect(data.data.args).toContain("backup")
+  })
+
+  test("doctor reports dar dependency as healthy", () => {
+    const r = runNoServer("plugins doctor dar --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 === "dar" && c.ok === true)).toBe(true)
+  })
+})
diff --git a/__tests__/irssi-plugin.test.js b/__tests__/irssi-plugin.test.js
new file mode 100644
index 000000000..70358ec4a
--- /dev/null
+++ b/__tests__/irssi-plugin.test.js
@@ -0,0 +1,73 @@
+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} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeIrssiBinary(dir) {
+  const bin = path.join(dir, "irssi")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args.includes('--version')) { console.log('irssi 1.4.5-test'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("irssi plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-irssi-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-irssi-"))
+  writeFakeIrssiBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    const install = runNoServer("plugins install ./plugins/irssi --on-conflict replace --json", { env })
+    expect(install.ok).toBe(true)
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove irssi --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("supports namespace passthrough", () => {
+    const r = runNoServer("irssi connect irc.libera.chat --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("irssi.passthrough")
+    expect(data.data.args).toContain("connect")
+    expect(data.data.args).toContain("irc.libera.chat")
+  })
+
+  test("doctor reports irssi dependency as healthy", () => {
+    const r = runNoServer("plugins doctor irssi --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 === "irssi" && c.ok === true)).toBe(true)
+  })
+})
diff --git a/__tests__/xata-plugin.test.js b/__tests__/xata-plugin.test.js
new file mode 100644
index 000000000..4820294de
--- /dev/null
+++ b/__tests__/xata-plugin.test.js
@@ -0,0 +1,73 @@
+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} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeXataBinary(dir) {
+  const bin = path.join(dir, "xata")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args.includes('--version')) { console.log('xata 0.16.0-test'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("xata plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-xata-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-xata-"))
+  writeFakeXataBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    const install = runNoServer("plugins install ./plugins/xata --on-conflict replace --json", { env })
+    expect(install.ok).toBe(true)
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove xata --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("supports namespace passthrough", () => {
+    const r = runNoServer("xata branch list --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("xata.passthrough")
+    expect(data.data.args).toContain("branch")
+    expect(data.data.args).toContain("list")
+  })
+
+  test("doctor reports xata dependency as healthy", () => {
+    const r = runNoServer("plugins doctor xata --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 === "xata" && c.ok === true)).toBe(true)
+  })
+})