diff --git a/__tests__/coder-plugin.test.js b/__tests__/coder-plugin.test.js
new file mode 100644
index 000000000..439d49e29
--- /dev/null
+++ b/__tests__/coder-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} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeCoderBinary(dir) {
+  const bin = path.join(dir, "coder")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args[0] === '--version') { console.log('coder v2.18.0-test'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("coder plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-coder-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-coder-"))
+  writeFakeCoderBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    runNoServer("plugins install ./plugins/coder --on-conflict replace --json", { env })
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove coder --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("supports namespace passthrough", () => {
+    const r = runNoServer("coder templates list --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("coder.passthrough")
+    expect(data.data.args).toContain("templates")
+    expect(data.data.args).toContain("list")
+    expect(data.data.args).toContain("--json")
+  })
+
+  test("doctor reports coder dependency as healthy", () => {
+    const r = runNoServer("plugins doctor coder --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 === "coder" && c.ok === true)).toBe(true)
+  })
+})
diff --git a/__tests__/pkl-plugin.test.js b/__tests__/pkl-plugin.test.js
new file mode 100644
index 000000000..e21087307
--- /dev/null
+++ b/__tests__/pkl-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} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakePklBinary(dir) {
+  const bin = path.join(dir, "pkl")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args[0] === '--version') { console.log('pkl 0.27.2-test'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("pkl plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-pkl-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-pkl-"))
+  writeFakePklBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    runNoServer("plugins install ./plugins/pkl --on-conflict replace --json", { env })
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove pkl --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("supports namespace passthrough", () => {
+    const r = runNoServer("pkl eval config.pkl --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("pkl.passthrough")
+    expect(data.data.args).toContain("eval")
+    expect(data.data.args).toContain("config.pkl")
+    expect(data.data.args).toContain("--json")
+  })
+
+  test("doctor reports pkl dependency as healthy", () => {
+    const r = runNoServer("plugins doctor pkl --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 === "pkl" && c.ok === true)).toBe(true)
+  })
+})
diff --git a/__tests__/rbspy-plugin.test.js b/__tests__/rbspy-plugin.test.js
new file mode 100644
index 000000000..ad02ffb58
--- /dev/null
+++ b/__tests__/rbspy-plugin.test.js
@@ -0,0 +1,74 @@
+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} ${args}`, {
+      encoding: "utf-8",
+      timeout: 15000,
+      env: { ...env, ...(options.env || {}) }
+    })
+    return { ok: true, output: out.trim(), code: 0 }
+  } catch (err) {
+    return {
+      ok: false,
+      output: (err.stdout || "").trim(),
+      stderr: (err.stderr || "").trim(),
+      code: err.status
+    }
+  }
+}
+
+function writeFakeRbspyBinary(dir) {
+  const bin = path.join(dir, "rbspy")
+  fs.writeFileSync(bin, [
+    "#!/usr/bin/env node",
+    "const args = process.argv.slice(2);",
+    "if (args[0] === '--version') { console.log('rbspy 0.18.1-test'); process.exit(0); }",
+    "console.log(JSON.stringify({ ok: true, args }));"
+  ].join("\n"), "utf-8")
+  fs.chmodSync(bin, 0o755)
+  return bin
+}
+
+describe("rbspy plugin", () => {
+  const fakeDir = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-rbspy-"))
+  const tempHome = fs.mkdtempSync(path.join(os.tmpdir(), "dcli-home-rbspy-"))
+  writeFakeRbspyBinary(fakeDir)
+  const env = { ...process.env, PATH: `${fakeDir}:${process.env.PATH || ""}`, SUPERCLI_HOME: tempHome }
+
+  beforeAll(() => {
+    runNoServer("plugins install ./plugins/rbspy --on-conflict replace --json", { env })
+  })
+
+  afterAll(() => {
+    runNoServer("plugins remove rbspy --json", { env })
+    fs.rmSync(fakeDir, { recursive: true, force: true })
+    fs.rmSync(tempHome, { recursive: true, force: true })
+  })
+
+  test("supports namespace passthrough", () => {
+    const r = runNoServer("rbspy record --pid 1234 --json", { env })
+    expect(r.ok).toBe(true)
+    const data = JSON.parse(r.output)
+    expect(data.command).toBe("rbspy.passthrough")
+    expect(data.data.args).toContain("record")
+    expect(data.data.args).toContain("--pid")
+    expect(data.data.args).toContain("1234")
+    expect(data.data.args).toContain("--json")
+  })
+
+  test("doctor reports rbspy dependency as healthy", () => {
+    const r = runNoServer("plugins doctor rbspy --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 === "rbspy" && c.ok === true)).toBe(true)
+  })
+})