diff --git a/src/cli/doctor/checks/index.ts b/src/cli/doctor/checks/index.ts
index 0ad6821fd..55e908b32 100644
--- a/src/cli/doctor/checks/index.ts
+++ b/src/cli/doctor/checks/index.ts
@@ -4,6 +4,7 @@ import { checkSystem, gatherSystemInfo } from "./system"
 import { checkConfig } from "./config"
 import { checkTools, gatherToolsSummary } from "./tools"
 import { checkModels } from "./model-resolution"
+import { checkTeamMode } from "./team-mode"
 
 export type { CheckDefinition }
 export * from "./model-resolution-types"
@@ -32,5 +33,10 @@ export function getAllCheckDefinitions(): CheckDefinition[] {
       name: CHECK_NAMES[CHECK_IDS.MODELS],
       check: checkModels,
     },
+    {
+      id: CHECK_IDS.TEAM_MODE,
+      name: CHECK_NAMES[CHECK_IDS.TEAM_MODE],
+      check: checkTeamMode,
+    },
   ]
 }
diff --git a/src/cli/doctor/checks/team-mode.ts b/src/cli/doctor/checks/team-mode.ts
new file mode 100644
index 000000000..3da6e15be
--- /dev/null
+++ b/src/cli/doctor/checks/team-mode.ts
@@ -0,0 +1,63 @@
+import { checkTeamModeDependencies } from "../../../features/team-mode/deps"
+import { resolveBaseDir } from "../../../features/team-mode/team-registry/paths"
+import { TeamModeConfigSchema } from "../../../config/schema/team-mode"
+import { CHECK_IDS, CHECK_NAMES } from "../constants"
+import type { CheckResult } from "../types"
+import { readFileSync, promises as fs } from "node:fs"
+import path from "node:path"
+import { detectPluginConfigFile, getOpenCodeConfigDir, parseJsonc } from "../../../shared"
+
+export async function checkTeamMode(): Promise<CheckResult> {
+  const config = loadTeamModeConfig()
+  const teamModeConfig = TeamModeConfigSchema.parse(config.team_mode ?? {})
+  if (!teamModeConfig.enabled) {
+    return { name: CHECK_NAMES[CHECK_IDS.TEAM_MODE], status: "skip", message: "team_mode: disabled", issues: [] }
+  }
+
+  const deps = await checkTeamModeDependencies(teamModeConfig)
+  const baseDir = resolveBaseDir(teamModeConfig)
+  const [baseDirExists, teamCount, runtimeCount] = await Promise.all([
+    pathExists(baseDir),
+    safeCount(path.join(baseDir, "teams")),
+    safeCount(path.join(baseDir, "runtime")),
+  ])
+  const baseDirMessage = baseDirExists ? `base dir: ok` : `base dir: missing (plugin init will create it on first use)`
+
+  return {
+    name: CHECK_NAMES[CHECK_IDS.TEAM_MODE],
+    status: deps.tmuxAvailable && deps.gitAvailable ? "pass" : "warn",
+    message: `team_mode: enabled | tmux: ${deps.tmuxAvailable ? "ok" : "missing"} | git: ${deps.gitAvailable ? "ok" : "missing"} | ${baseDirMessage} | declared: ${teamCount} | runtime dirs: ${runtimeCount}`,
+    details: undefined,
+    issues: [],
+  }
+}
+
+function loadTeamModeConfig() {
+  const projectConfig = detectPluginConfigFile(path.join(process.cwd(), ".opencode"))
+  const userConfig = detectPluginConfigFile(getOpenCodeConfigDir({ binary: "opencode" }))
+  const configPath = projectConfig.format !== "none" ? projectConfig.path : userConfig.path
+  if (!configPath) return { team_mode: undefined }
+  try {
+    return parseJsonc<{ team_mode?: { enabled?: boolean } }>(readFileSync(configPath, "utf-8"))
+  } catch {
+    return { team_mode: undefined }
+  }
+}
+
+async function safeCount(dir: string): Promise<number> {
+  try {
+    const entries = await fs.readdir(dir, { withFileTypes: true })
+    return entries.filter((entry) => entry.isDirectory()).length
+  } catch {
+    return 0
+  }
+}
+
+async function pathExists(dir: string): Promise<boolean> {
+  try {
+    const stats = await fs.stat(dir)
+    return stats.isDirectory()
+  } catch {
+    return false
+  }
+}
diff --git a/src/cli/doctor/constants.ts b/src/cli/doctor/constants.ts
index ea2c43a98..dad93f8e8 100644
--- a/src/cli/doctor/constants.ts
+++ b/src/cli/doctor/constants.ts
@@ -23,6 +23,7 @@ export const CHECK_IDS = {
   CONFIG: "config",
   TOOLS: "tools",
   MODELS: "models",
+  TEAM_MODE: "team-mode",
 } as const
 
 export const CHECK_NAMES: Record<string, string> = {
@@ -30,6 +31,7 @@ export const CHECK_NAMES: Record<string, string> = {
   [CHECK_IDS.CONFIG]: "Configuration",
   [CHECK_IDS.TOOLS]: "Tools",
   [CHECK_IDS.MODELS]: "Models",
+  [CHECK_IDS.TEAM_MODE]: "Team Mode",
 } as const
 
 export const EXIT_CODES = {