feat(tools): add interactive_bash tool for tmux session management

Add a new tool for managing tmux sessions with automatic tracking and cleanup:

- interactive_bash tool: Accepts tmux commands via tmux_command parameter
- Session tracking hook: Tracks omo-* prefixed tmux sessions per OpenCode session
- System reminder: Appends active session list after create/delete operations
- Auto cleanup: Kills all tracked tmux sessions on OpenCode session deletion
- Output truncation: Registered in TRUNCATABLE_TOOLS for long capture-pane outputs

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/hooks/index.ts

@@ -18,3 +18,4 @@ export { createAutoUpdateCheckerHook } from "./auto-update-checker";
 export { createAgentUsageReminderHook } from "./agent-usage-reminder";
 export { createKeywordDetectorHook } from "./keyword-detector";
 export { createNonInteractiveEnvHook } from "./non-interactive-env";
+export { createInteractiveBashSessionHook } from "./interactive-bash-session";

src/hooks/interactive-bash-session/constants.ts

@@ -0,0 +1,15 @@
+import { join } from "node:path";
+import { xdgData } from "xdg-basedir";
+
+export const OPENCODE_STORAGE = join(xdgData ?? "", "opencode", "storage");
+export const INTERACTIVE_BASH_SESSION_STORAGE = join(
+  OPENCODE_STORAGE,
+  "interactive-bash-session",
+);
+
+export const OMO_SESSION_PREFIX = "omo-";
+
+export function buildSessionReminderMessage(sessions: string[]): string {
+  if (sessions.length === 0) return "";
+  return `\n\n[System Reminder] Active omo-* tmux sessions: ${sessions.join(", ")}`;
+}

src/hooks/interactive-bash-session/index.ts

@@ -0,0 +1,137 @@
+import type { PluginInput } from "@opencode-ai/plugin";
+import {
+  loadInteractiveBashSessionState,
+  saveInteractiveBashSessionState,
+  clearInteractiveBashSessionState,
+} from "./storage";
+import { OMO_SESSION_PREFIX, buildSessionReminderMessage } from "./constants";
+import type { InteractiveBashSessionState } from "./types";
+
+interface ToolExecuteInput {
+  tool: string;
+  sessionID: string;
+  callID: string;
+  args?: Record<string, unknown>;
+}
+
+interface ToolExecuteOutput {
+  title: string;
+  output: string;
+  metadata: unknown;
+}
+
+interface EventInput {
+  event: {
+    type: string;
+    properties?: unknown;
+  };
+}
+
+export function createInteractiveBashSessionHook(_ctx: PluginInput) {
+  const sessionStates = new Map<string, InteractiveBashSessionState>();
+
+  function getOrCreateState(sessionID: string): InteractiveBashSessionState {
+    if (!sessionStates.has(sessionID)) {
+      const persisted = loadInteractiveBashSessionState(sessionID);
+      const state: InteractiveBashSessionState = persisted ?? {
+        sessionID,
+        tmuxSessions: new Set<string>(),
+        updatedAt: Date.now(),
+      };
+      sessionStates.set(sessionID, state);
+    }
+    return sessionStates.get(sessionID)!;
+  }
+
+  function extractSessionNameFromFlags(tmuxCommand: string): string | null {
+    const sessionFlagMatch = tmuxCommand.match(/(?:-s|-t)\s+(\S+)/);
+    return sessionFlagMatch?.[1] ?? null;
+  }
+
+  function isOmoSession(sessionName: string | null): boolean {
+    return sessionName !== null && sessionName.startsWith(OMO_SESSION_PREFIX);
+  }
+
+  async function killAllTrackedSessions(
+    state: InteractiveBashSessionState,
+  ): Promise<void> {
+    for (const sessionName of state.tmuxSessions) {
+      try {
+        const proc = Bun.spawn(["tmux", "kill-session", "-t", sessionName], {
+          stdout: "ignore",
+          stderr: "ignore",
+        });
+        await proc.exited;
+      } catch {}
+    }
+  }
+
+  const toolExecuteAfter = async (
+    input: ToolExecuteInput,
+    output: ToolExecuteOutput,
+  ) => {
+    const { tool, sessionID, args } = input;
+    const toolLower = tool.toLowerCase();
+
+    if (toolLower !== "interactive_bash") {
+      return;
+    }
+
+    const tmuxCommand = (args?.tmux_command as string) ?? "";
+    const state = getOrCreateState(sessionID);
+    let stateChanged = false;
+
+    const hasNewSession = tmuxCommand.includes("new-session");
+    const hasKillSession = tmuxCommand.includes("kill-session");
+    const hasKillServer = tmuxCommand.includes("kill-server");
+
+    const sessionName = extractSessionNameFromFlags(tmuxCommand);
+
+    if (hasNewSession && isOmoSession(sessionName)) {
+      state.tmuxSessions.add(sessionName!);
+      stateChanged = true;
+    } else if (hasKillSession && isOmoSession(sessionName)) {
+      state.tmuxSessions.delete(sessionName!);
+      stateChanged = true;
+    } else if (hasKillServer) {
+      state.tmuxSessions.clear();
+      stateChanged = true;
+    }
+
+    if (stateChanged) {
+      state.updatedAt = Date.now();
+      saveInteractiveBashSessionState(state);
+    }
+
+    const isSessionOperation = hasNewSession || hasKillSession || hasKillServer;
+    if (isSessionOperation) {
+      const reminder = buildSessionReminderMessage(
+        Array.from(state.tmuxSessions),
+      );
+      if (reminder) {
+        output.output += reminder;
+      }
+    }
+  };
+
+  const eventHandler = async ({ event }: EventInput) => {
+    const props = event.properties as Record<string, unknown> | undefined;
+
+    if (event.type === "session.deleted") {
+      const sessionInfo = props?.info as { id?: string } | undefined;
+      const sessionID = sessionInfo?.id;
+
+      if (sessionID) {
+        const state = getOrCreateState(sessionID);
+        await killAllTrackedSessions(state);
+        sessionStates.delete(sessionID);
+        clearInteractiveBashSessionState(sessionID);
+      }
+    }
+  };
+
+  return {
+    "tool.execute.after": toolExecuteAfter,
+    event: eventHandler,
+  };
+}

src/hooks/interactive-bash-session/storage.ts

@@ -0,0 +1,59 @@
+import {
+  existsSync,
+  mkdirSync,
+  readFileSync,
+  writeFileSync,
+  unlinkSync,
+} from "node:fs";
+import { join } from "node:path";
+import { INTERACTIVE_BASH_SESSION_STORAGE } from "./constants";
+import type {
+  InteractiveBashSessionState,
+  SerializedInteractiveBashSessionState,
+} from "./types";
+
+function getStoragePath(sessionID: string): string {
+  return join(INTERACTIVE_BASH_SESSION_STORAGE, `${sessionID}.json`);
+}
+
+export function loadInteractiveBashSessionState(
+  sessionID: string,
+): InteractiveBashSessionState | null {
+  const filePath = getStoragePath(sessionID);
+  if (!existsSync(filePath)) return null;
+
+  try {
+    const content = readFileSync(filePath, "utf-8");
+    const serialized = JSON.parse(content) as SerializedInteractiveBashSessionState;
+    return {
+      sessionID: serialized.sessionID,
+      tmuxSessions: new Set(serialized.tmuxSessions),
+      updatedAt: serialized.updatedAt,
+    };
+  } catch {
+    return null;
+  }
+}
+
+export function saveInteractiveBashSessionState(
+  state: InteractiveBashSessionState,
+): void {
+  if (!existsSync(INTERACTIVE_BASH_SESSION_STORAGE)) {
+    mkdirSync(INTERACTIVE_BASH_SESSION_STORAGE, { recursive: true });
+  }
+
+  const filePath = getStoragePath(state.sessionID);
+  const serialized: SerializedInteractiveBashSessionState = {
+    sessionID: state.sessionID,
+    tmuxSessions: Array.from(state.tmuxSessions),
+    updatedAt: state.updatedAt,
+  };
+  writeFileSync(filePath, JSON.stringify(serialized, null, 2));
+}
+
+export function clearInteractiveBashSessionState(sessionID: string): void {
+  const filePath = getStoragePath(sessionID);
+  if (existsSync(filePath)) {
+    unlinkSync(filePath);
+  }
+}

src/hooks/interactive-bash-session/types.ts

@@ -0,0 +1,11 @@
+export interface InteractiveBashSessionState {
+  sessionID: string;
+  tmuxSessions: Set<string>;
+  updatedAt: number;
+}
+
+export interface SerializedInteractiveBashSessionState {
+  sessionID: string;
+  tmuxSessions: string[];
+  updatedAt: number;
+}

src/hooks/tool-output-truncator.ts

@@ -13,6 +13,8 @@ const TRUNCATABLE_TOOLS = [
   "lsp_workspace_symbols",
   "lsp_diagnostics",
   "ast_grep_search",
+  "interactive_bash",
+  "Interactive_bash",
 ]
 
 export function createToolOutputTruncatorHook(ctx: PluginInput) {