Add Telegram and Discord IM channels

src/channels/shared/conversation-state-store.mjs

@@ -0,0 +1,107 @@
+import { mkdir, readFile, rename, unlink, writeFile } from 'node:fs/promises';
+import { dirname } from 'node:path';
+
+const EMPTY_STATE = Object.freeze({ version: 1, sessions: {}, seenMessageIds: [], cursor: null });
+
+function normalizeState(value) {
+  if (!value || typeof value !== 'object') return structuredClone(EMPTY_STATE);
+  const sessions = {};
+  if (value.sessions && typeof value.sessions === 'object' && !Array.isArray(value.sessions)) {
+    for (const [key, sessionId] of Object.entries(value.sessions)) {
+      if (typeof key === 'string' && key && typeof sessionId === 'string' && sessionId) {
+        sessions[key] = sessionId;
+      }
+    }
+  }
+  return {
+    version: 1,
+    sessions,
+    seenMessageIds: Array.isArray(value.seenMessageIds)
+      ? value.seenMessageIds.filter((id) => typeof id === 'string' && id).slice(-1_000)
+      : [],
+    cursor: Number.isSafeInteger(value.cursor) && value.cursor >= 0 ? value.cursor : null,
+  };
+}
+
+export class ConversationStateStore {
+  #path;
+  #state = structuredClone(EMPTY_STATE);
+  #writeQueue = Promise.resolve();
+
+  constructor(path) {
+    this.#path = path;
+  }
+
+  async load() {
+    try {
+      this.#state = normalizeState(JSON.parse(await readFile(this.#path, 'utf8')));
+    } catch (error) {
+      if (error?.code !== 'ENOENT') throw error;
+      this.#state = structuredClone(EMPTY_STATE);
+      await this.#persist();
+    }
+    return this;
+  }
+
+  sessionFor(key) {
+    return this.#state.sessions[key] ?? null;
+  }
+
+  async setSession(key, sessionId) {
+    this.#state.sessions[key] = sessionId;
+    await this.#persist();
+  }
+
+  async clearSession(key) {
+    delete this.#state.sessions[key];
+    await this.#persist();
+  }
+
+  hasSeen(messageId) {
+    return this.#state.seenMessageIds.includes(messageId);
+  }
+
+  async markSeen(messageId) {
+    if (this.hasSeen(messageId)) return;
+    this.#state.seenMessageIds.push(messageId);
+    if (this.#state.seenMessageIds.length > 1_000) {
+      this.#state.seenMessageIds.splice(0, this.#state.seenMessageIds.length - 1_000);
+    }
+    await this.#persist();
+  }
+
+  cursor() {
+    return this.#state.cursor;
+  }
+
+  async setCursor(cursor) {
+    if (!Number.isSafeInteger(cursor) || cursor < 0) throw new TypeError('Invalid update cursor');
+    this.#state.cursor = cursor;
+    await this.#persist();
+  }
+
+  snapshot() {
+    return structuredClone(this.#state);
+  }
+
+  async remove() {
+    try {
+      await unlink(this.#path);
+    } catch (error) {
+      if (error?.code !== 'ENOENT') throw error;
+    }
+    this.#state = structuredClone(EMPTY_STATE);
+  }
+
+  async #persist() {
+    const snapshot = `${JSON.stringify(this.#state, null, 2)}\n`;
+    const operation = this.#writeQueue.then(async () => {
+      await mkdir(dirname(this.#path), { recursive: true, mode: 0o700 });
+      const temporary = `${this.#path}.tmp`;
+      await writeFile(temporary, snapshot, { encoding: 'utf8', mode: 0o600 });
+      await rename(temporary, this.#path);
+    });
+    this.#writeQueue = operation.then(() => undefined, () => undefined);
+    await operation;
+  }
+}

src/channels/shared/editable-message-stream.mjs

@@ -0,0 +1,81 @@
+export function splitMessageText(value, limit) {
+  const text = typeof value === 'string' ? value.trim() : '';
+  if (!text) return [];
+  const chunks = [];
+  let remaining = text;
+  while (remaining.length > limit) {
+    let cut = remaining.lastIndexOf('\n', limit);
+    if (cut < Math.floor(limit * 0.55)) cut = remaining.lastIndexOf(' ', limit);
+    if (cut < Math.floor(limit * 0.55)) cut = limit;
+    chunks.push(remaining.slice(0, cut).trim());
+    remaining = remaining.slice(cut).trimStart();
+  }
+  if (remaining) chunks.push(remaining);
+  return chunks;
+}
+
+export function createEditableMessageStream({
+  initialText = '正在处理…',
+  limit,
+  updateIntervalMs = 800,
+  create,
+  edit,
+  sendRemainder,
+  logger = console,
+}) {
+  let messageId;
+  let pending = null;
+  let timer = null;
+  let inFlight = null;
+  let closed = false;
+  let lastSent = initialText;
+
+  const schedule = () => {
+    if (closed || timer !== null || inFlight || !pending) return;
+    timer = setTimeout(() => {
+      timer = null;
+      const text = pending;
+      pending = null;
+      const next = splitMessageText(text, limit)[0] ?? initialText;
+      inFlight = Promise.resolve(next === lastSent ? undefined : edit(messageId, next))
+        .then(() => { lastSent = next; })
+        .catch((error) => logger.warn?.('[dsh-im] streamed message update failed:', error))
+        .finally(() => {
+          inFlight = null;
+          schedule();
+        });
+    }, updateIntervalMs);
+    timer?.unref?.();
+  };
+
+  return {
+    async start() {
+      messageId = await create(initialText);
+      return this;
+    },
+    update(text) {
+      if (closed || typeof text !== 'string' || !text.trim()) return;
+      pending = text;
+      schedule();
+    },
+    async finish(text) {
+      if (closed) throw new Error('Message stream is already closed');
+      closed = true;
+      if (timer !== null) clearTimeout(timer);
+      timer = null;
+      pending = null;
+      await inFlight?.catch(() => undefined);
+      const chunks = splitMessageText(text, limit);
+      const first = chunks[0] ?? '处理完成。';
+      if (first !== lastSent) await edit(messageId, first);
+      lastSent = first;
+      for (const chunk of chunks.slice(1)) await sendRemainder(chunk);
+    },
+    cancel() {
+      closed = true;
+      pending = null;
+      if (timer !== null) clearTimeout(timer);
+      timer = null;
+    },
+  };
+}

src/channels/shared/text-harness-bridge.mjs

@@ -0,0 +1,180 @@
+function cleanText(value) {
+  return typeof value === 'string' ? value.trim() : '';
+}
+
+export function createTextBridgeStatus() {
+  return {
+    messagesReceived: 0,
+    messagesReplied: 0,
+    messagesRejected: 0,
+    lastMessageAt: null,
+    lastReplyAt: null,
+    lastRejectedAt: null,
+    lastError: null,
+  };
+}
+
+export class TextHarnessBridge {
+  #descriptor;
+  #bot;
+  #harness;
+  #state;
+  #status;
+  #logger;
+  #replyTimeoutMs;
+  #queues = new Map();
+
+  constructor({
+    descriptor,
+    bot,
+    harness,
+    state,
+    status = createTextBridgeStatus(),
+    logger = console,
+    replyTimeoutMs = 600_000,
+  }) {
+    if (!descriptor?.key || !descriptor?.label) throw new TypeError('A channel descriptor is required');
+    if (!bot || typeof bot.sendText !== 'function') throw new TypeError('A bot client is required');
+    if (!harness || !state) throw new TypeError('Harness client and state store are required');
+    this.#descriptor = descriptor;
+    this.#bot = bot;
+    this.#harness = harness;
+    this.#state = state;
+    this.#status = status;
+    this.#logger = logger;
+    this.#replyTimeoutMs = replyTimeoutMs;
+  }
+
+  get status() {
+    return structuredClone(this.#status);
+  }
+
+  accept(message) {
+    const conversationId = cleanText(message?.conversationId);
+    const kind = message?.kind === 'group' ? 'group' : 'direct';
+    const key = `${kind}:${conversationId}`;
+    const previous = this.#queues.get(key) ?? Promise.resolve();
+    const current = previous
+      .catch(() => undefined)
+      .then(() => this.#process({ ...message, kind, conversationId }))
+      .finally(() => {
+        if (this.#queues.get(key) === current) this.#queues.delete(key);
+      });
+    this.#queues.set(key, current);
+    return current;
+  }
+
+  async waitForIdle() {
+    await Promise.allSettled([...this.#queues.values()]);
+  }
+
+  async #process(message) {
+    const messageId = cleanText(message.messageId);
+    const senderId = cleanText(message.senderId);
+    if (!messageId || !senderId || !message.conversationId || message.senderIsBot === true) return;
+    if (this.#state.hasSeen(messageId)) return;
+
+    this.#status.messagesReceived += 1;
+    this.#status.lastMessageAt = new Date().toISOString();
+    if (message.kind === 'group' && message.addressed !== true) {
+      this.#status.messagesRejected += 1;
+      this.#status.lastRejectedAt = new Date().toISOString();
+      return;
+    }
+
+    const target = message.replyTarget;
+    const text = cleanText(message.content);
+    try {
+      if (!text) {
+        await this.#bot.sendText(target, '目前仅支持文字消息。');
+        await this.#state.markSeen(messageId);
+        return;
+      }
+      const command = text.toLowerCase();
+      if (command === '/help') {
+        await this.#bot.sendText(target, [
+          `${this.#descriptor.label}机器人已连接 DeepSeek Harness。`,
+          '',
+          '直接发送文字即可继续当前会话。',
+          '/new  开启一个全新会话',
+          '/status  检查连接状态',
+          '/help  显示本帮助',
+        ].join('\n'));
+        await this.#state.markSeen(messageId);
+        return;
+      }
+      if (command === '/status') {
+        await this.#harness.ensureRunning();
+        await this.#bot.sendText(target, `${this.#descriptor.label}机器人与 DeepSeek Harness 连接正常。`);
+        await this.#state.markSeen(messageId);
+        return;
+      }
+      const conversationKey = `${message.kind}:${message.conversationId}`;
+      if (command === '/new') {
+        await this.#state.clearSession(conversationKey);
+        await this.#bot.sendText(target, '已开启新会话。请发送你的问题。');
+        await this.#state.markSeen(messageId);
+        return;
+      }
+
+      let sessionId = this.#state.sessionFor(conversationKey);
+      if (!sessionId || !(await this.#harness.sessionExists(sessionId))) {
+        sessionId = await this.#harness.createSession();
+        await this.#state.setSession(conversationKey, sessionId);
+      }
+
+      await this.#bot.sendTyping?.(target).catch((error) => {
+        this.#logger.warn?.(`[dsh-im:${this.#descriptor.key}] typing indicator failed:`, error);
+      });
+      let stream = null;
+      let streamFinished = false;
+      if (typeof this.#bot.openStream === 'function') {
+        try {
+          stream = await this.#bot.openStream(target);
+        } catch (error) {
+          this.#logger.warn?.(
+            `[dsh-im:${this.#descriptor.key}] unable to start a streamed reply; using text:`,
+            error,
+          );
+        }
+      }
+      const answer = await this.#harness.ask(sessionId, text, {
+        timeoutMs: this.#replyTimeoutMs,
+        onUpdate: stream ? async (update) => {
+          const progress = update.type === 'text' ? update.text
+            : update.type === 'tool' ? `正在使用${update.name}…` : update.text;
+          if (progress) await stream.update(progress);
+        } : undefined,
+      });
+      if (stream) {
+        try {
+          await stream.finish(answer);
+          streamFinished = true;
+        } catch (error) {
+          stream.cancel?.();
+          this.#logger.warn?.(
+            `[dsh-im:${this.#descriptor.key}] streamed reply finalization failed; using text:`,
+            error,
+          );
+        }
+      }
+      if (!streamFinished) await this.#bot.sendText(target, answer);
+      await this.#state.markSeen(messageId);
+      this.#status.messagesReplied += 1;
+      this.#status.lastReplyAt = new Date().toISOString();
+      this.#status.lastError = null;
+    } catch (error) {
+      this.#status.lastError = error?.message ?? String(error);
+      this.#logger.error?.(`[dsh-im:${this.#descriptor.key}] failed to process a message:`, error);
+      try {
+        await this.#bot.sendText(target, '消息处理失败，请稍后重试。');
+        await this.#state.markSeen(messageId);
+      } catch (sendError) {
+        this.#logger.error?.(
+          `[dsh-im:${this.#descriptor.key}] failed to send the safe error reply:`,
+          sendError,
+        );
+      }
+    }
+  }
+}

src/channels/shared/token-bot-controller.mjs

@@ -0,0 +1,298 @@
+function cleanString(value) {
+  return typeof value === 'string' && value.trim() ? value.trim() : null;
+}
+
+function safeError(code, message) {
+  return Object.freeze({ code, message });
+}
+
+export class TokenBotController {
+  #descriptor;
+  #credentials;
+  #configStore;
+  #inspectToken;
+  #deriveIdentity;
+  #maskPlatformId;
+  #createRuntime;
+  #deleteState;
+  #logger;
+  #runtimes = new Map();
+  #errors = new Map();
+  #transitions = new Map();
+  #revision = 0;
+  #closed = false;
+
+  constructor({
+    descriptor,
+    credentials,
+    configStore,
+    inspectToken,
+    deriveIdentity,
+    maskPlatformId,
+    createRuntime,
+    deleteState = async () => {},
+    logger = console,
+  }) {
+    if (!descriptor?.key || !descriptor?.label || !descriptor?.connectionLabel) {
+      throw new TypeError('TokenBotController requires a channel descriptor');
+    }
+    if (!credentials || typeof credentials.resolve !== 'function'
+      || typeof credentials.set !== 'function' || typeof credentials.unset !== 'function') {
+      throw new TypeError(`${descriptor.label} requires the DSH credential provider`);
+    }
+    if (!configStore || typeof configStore.list !== 'function'
+      || typeof configStore.save !== 'function' || typeof configStore.remove !== 'function') {
+      throw new TypeError(`${descriptor.label} requires a config store`);
+    }
+    if (typeof inspectToken !== 'function' || typeof deriveIdentity !== 'function'
+      || typeof maskPlatformId !== 'function' || typeof createRuntime !== 'function') {
+      throw new TypeError(`${descriptor.label} controller dependencies are incomplete`);
+    }
+    this.#descriptor = descriptor;
+    this.#credentials = credentials;
+    this.#configStore = configStore;
+    this.#inspectToken = inspectToken;
+    this.#deriveIdentity = deriveIdentity;
+    this.#maskPlatformId = maskPlatformId;
+    this.#createRuntime = createRuntime;
+    this.#deleteState = deleteState;
+    this.#logger = logger;
+  }
+
+  async initialize() {
+    if (this.#closed) return this.status();
+    for (const config of this.#configStore.list()) {
+      await this.#withBotTransition(config.botId, async () => {
+        if (this.#closed || this.#runtimes.get(config.botId)?.status?.ready) return;
+        const token = await this.#resolveToken(config.tokenRef);
+        if (!token) {
+          this.#errors.set(config.botId, safeError(
+            'missing-token',
+            `${this.#descriptor.label}机器人凭据缺失，请移除后重新接入。`,
+          ));
+          return;
+        }
+        try {
+          await this.#startRuntime(config, token);
+          this.#errors.delete(config.botId);
+        } catch (error) {
+          this.#errors.set(config.botId, safeError(
+            'connection-failed',
+            `${this.#descriptor.label}连接未就绪，插件会自动重试。`,
+          ));
+          this.#logger.warn?.(
+            `[dsh-im:${this.#descriptor.key}] bot ${config.botId} failed to initialize:`,
+            error,
+          );
+        } finally {
+          this.#touch();
+        }
+      });
+    }
+    return this.status();
+  }
+
+  async bindCredentials({ token } = {}) {
+    if (this.#closed) throw new Error(`${this.#descriptor.label} controller is closed`);
+    const normalizedToken = cleanString(token);
+    if (!normalizedToken) throw new TypeError(`${this.#descriptor.label} Bot Token is required`);
+    const inspected = await this.#inspectToken(normalizedToken);
+    const platformId = cleanString(inspected?.platformId);
+    const name = cleanString(inspected?.name);
+    if (!platformId || !name) throw new Error(`${this.#descriptor.label} returned an invalid bot identity`);
+    const identity = this.#deriveIdentity(platformId);
+    await this.#withBotTransition(identity.botId, async () => {
+      if (this.#closed) throw new Error(`${this.#descriptor.label} controller is closed`);
+      const previousConfig = this.#configStore.getByPlatformId(platformId);
+      const previousToken = await this.#credentials.resolve(identity.tokenRef).catch(() => undefined);
+      const config = {
+        botId: identity.botId,
+        platformId,
+        tokenRef: identity.tokenRef,
+        name,
+        username: cleanString(inspected.username),
+        createdAt: previousConfig?.createdAt ?? new Date().toISOString(),
+        connectedAt: new Date().toISOString(),
+      };
+      await this.#credentials.set(identity.tokenRef, normalizedToken);
+      try {
+        await this.#configStore.save(config);
+      } catch (error) {
+        await this.#restoreCredential(identity.tokenRef, previousToken);
+        throw error;
+      }
+      try {
+        await this.#startRuntime(config, normalizedToken);
+        this.#errors.delete(identity.botId);
+      } catch (error) {
+        this.#errors.set(identity.botId, safeError(
+          'connection-failed',
+          `${this.#descriptor.label}机器人已接入，消息连接暂未就绪。`,
+        ));
+        this.#logger.warn?.(
+          `[dsh-im:${this.#descriptor.key}] bot ${identity.botId} credential connection failed:`,
+          error,
+        );
+      }
+      this.#touch();
+    });
+    return this.status();
+  }
+
+  async reconnectBot(botId) {
+    const config = this.#configStore.get(botId);
+    if (!config) throw new Error(`Unknown ${this.#descriptor.label} bot`);
+    await this.#withBotTransition(botId, async () => {
+      const token = await this.#resolveToken(config.tokenRef);
+      if (!token) throw new Error(`${this.#descriptor.label} bot token is missing`);
+      try {
+        await this.#startRuntime(config, token);
+        this.#errors.delete(botId);
+      } catch (error) {
+        this.#errors.set(botId, safeError(
+          'connection-failed',
+          `${this.#descriptor.label}连接仍未就绪，请稍后重试。`,
+        ));
+        throw error;
+      } finally {
+        this.#touch();
+      }
+    });
+    return this.status();
+  }
+
+  async deleteBot(botId) {
+    const config = this.#configStore.get(botId);
+    if (!config) throw new Error(`Unknown ${this.#descriptor.label} bot`);
+    await this.#withBotTransition(botId, async () => {
+      const previous = await this.#credentials.resolve(config.tokenRef).catch(() => undefined);
+      await this.#stopRuntime(botId);
+      try {
+        await this.#credentials.unset(config.tokenRef);
+        await this.#configStore.remove(botId);
+      } catch (error) {
+        if (previous?.value) {
+          await this.#credentials.set(config.tokenRef, previous.value).catch(() => undefined);
+          await this.#startRuntime(config, previous.value).catch(() => undefined);
+        }
+        throw new Error(`Unable to remove the ${this.#descriptor.label} bot safely.`, { cause: error });
+      }
+      await this.#deleteState({ botId, config }).catch((error) => {
+        this.#logger.warn?.(
+          `[dsh-im:${this.#descriptor.key}] bot ${botId} state cleanup failed:`,
+          error,
+        );
+      });
+      this.#errors.delete(botId);
+      this.#touch();
+    });
+    return this.status();
+  }
+
+  status() {
+    const bots = this.#configStore.list().map((config) => {
+      const runtimeStatus = this.#runtimes.get(config.botId)?.status ?? null;
+      const connected = runtimeStatus?.ready === true
+        && runtimeStatus.connectionState === 'connected'
+        && runtimeStatus.harnessReachable === true;
+      const state = connected ? 'connected'
+        : runtimeStatus?.connectionState === 'connecting' ? 'connecting'
+          : this.#errors.has(config.botId) || runtimeStatus?.connectionState === 'failed'
+            ? 'error' : 'offline';
+      return {
+        botId: config.botId,
+        state,
+        connected,
+        configured: true,
+        bot: {
+          name: config.name,
+          username: config.username,
+          idMasked: this.#maskPlatformId(config.platformId),
+        },
+        health: {
+          status: connected ? 'healthy' : state === 'error' ? 'error' : 'offline',
+          summary: connected ? `${this.#descriptor.label}${this.#descriptor.connectionLabel}运行正常`
+            : state === 'error' ? `${this.#descriptor.label}连接未就绪，插件会自动重试`
+              : `${this.#descriptor.label}连接当前离线`,
+          lastCheckedAt: runtimeStatus?.lastCheckedAt ?? null,
+          lastConnectedAt: runtimeStatus?.lastConnectedAt ?? null,
+        },
+        stats: {
+          messagesReceived: runtimeStatus?.messagesReceived ?? 0,
+          messagesReplied: runtimeStatus?.messagesReplied ?? 0,
+        },
+        error: structuredClone(this.#errors.get(config.botId) ?? null),
+      };
+    });
+    const connectedCount = bots.filter((bot) => bot.connected).length;
+    return {
+      schemaVersion: 1,
+      revision: this.#revision,
+      state: bots.length === 0 ? 'disconnected'
+        : connectedCount === bots.length ? 'connected'
+          : connectedCount > 0 ? 'degraded' : 'offline',
+      bots,
+      totals: { configured: bots.length, connected: connectedCount },
+    };
+  }
+
+  async close() {
+    if (this.#closed) return;
+    this.#closed = true;
+    await Promise.allSettled([...this.#transitions.values()]);
+    await Promise.allSettled([...this.#runtimes.keys()].map((botId) => this.#stopRuntime(botId)));
+  }
+
+  async #startRuntime(config, token) {
+    if (this.#closed) throw new Error(`${this.#descriptor.label} controller is closed`);
+    await this.#stopRuntime(config.botId);
+    if (this.#closed) throw new Error(`${this.#descriptor.label} controller is closed`);
+    const runtime = await this.#createRuntime({ botId: config.botId, config, token });
+    if (!runtime || typeof runtime.start !== 'function' || typeof runtime.stop !== 'function') {
+      throw new TypeError(`createRuntime returned an invalid ${this.#descriptor.label} runtime`);
+    }
+    this.#runtimes.set(config.botId, runtime);
+    try {
+      await runtime.start();
+    } catch (error) {
+      await runtime.stop().catch(() => undefined);
+      this.#runtimes.delete(config.botId);
+      throw error;
+    }
+  }
+
+  async #stopRuntime(botId) {
+    const runtime = this.#runtimes.get(botId);
+    this.#runtimes.delete(botId);
+    await runtime?.stop().catch((error) => {
+      this.#logger.warn?.(
+        `[dsh-im:${this.#descriptor.key}] bot ${botId} failed to stop cleanly:`,
+        error,
+      );
+    });
+  }
+
+  async #resolveToken(ref) {
+    const result = await this.#credentials.resolve(ref).catch(() => undefined);
+    return cleanString(result?.value);
+  }
+
+  async #restoreCredential(ref, previous) {
+    if (previous?.value) await this.#credentials.set(ref, previous.value).catch(() => undefined);
+    else await this.#credentials.unset(ref).catch(() => undefined);
+  }
+
+  #withBotTransition(botId, operation) {
+    const previous = this.#transitions.get(botId) ?? Promise.resolve();
+    const current = previous.catch(() => undefined).then(operation);
+    const settled = current.finally(() => {
+      if (this.#transitions.get(botId) === settled) this.#transitions.delete(botId);
+    });
+    this.#transitions.set(botId, settled);
+    return settled;
+  }
+
+  #touch() {
+    this.#revision += 1;
+  }
+}

src/channels/shared/token-config-store.mjs

@@ -0,0 +1,180 @@
+import { createHash } from 'node:crypto';
+import { mkdir, readFile, rename, unlink, writeFile } from 'node:fs/promises';
+import { dirname } from 'node:path';
+
+const EMPTY_DOCUMENT = Object.freeze({ version: 1, bots: Object.freeze([]) });
+
+function cleanString(value) {
+  return typeof value === 'string' && value.trim() ? value.trim() : null;
+}
+
+function escapePattern(value) {
+  return value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+}
+
+export function deriveTokenBotIdentity(platformId, { botPrefix, tokenRefPrefix }) {
+  const raw = cleanString(platformId);
+  if (!raw) throw new TypeError('platformId is required');
+  const digest = createHash('sha256').update(raw).digest('hex').slice(0, 24);
+  return {
+    botId: `${botPrefix}_${digest}`,
+    tokenRef: `${tokenRefPrefix}_${digest.toUpperCase()}`,
+  };
+}
+
+export function maskPlatformId(platformId, fallback) {
+  const value = cleanString(platformId) ?? '';
+  if (value.length <= 10) return value ? `${value.slice(0, 3)}•••` : fallback;
+  return `${value.slice(0, 6)}••••${value.slice(-4)}`;
+}
+
+export class TokenBotConfigStore {
+  #path;
+  #channel;
+  #botPrefix;
+  #tokenRefPrefix;
+  #botIdPattern;
+  #tokenRefPattern;
+  #value = EMPTY_DOCUMENT;
+  #writeQueue = Promise.resolve();
+
+  constructor(path, { channel, botPrefix, tokenRefPrefix }) {
+    this.#path = path;
+    this.#channel = channel;
+    this.#botPrefix = botPrefix;
+    this.#tokenRefPrefix = tokenRefPrefix;
+    this.#botIdPattern = new RegExp(`^${escapePattern(botPrefix)}_[a-f0-9]{24}$`);
+    this.#tokenRefPattern = new RegExp(`^${escapePattern(tokenRefPrefix)}_[A-F0-9]{24}$`);
+  }
+
+  async load() {
+    try {
+      const normalized = this.#normalizeDocument(JSON.parse(await readFile(this.#path, 'utf8')));
+      if (!normalized) throw new Error(`dsh-im ${this.#channel} config contains invalid bot data`);
+      this.#value = normalized;
+    } catch (error) {
+      if (error?.code !== 'ENOENT') throw error;
+      this.#value = EMPTY_DOCUMENT;
+    }
+    return this;
+  }
+
+  list() {
+    return structuredClone(this.#value.bots);
+  }
+
+  get(botId) {
+    const bot = this.#value.bots.find((candidate) => candidate.botId === botId);
+    return bot ? structuredClone(bot) : null;
+  }
+
+  getByPlatformId(platformId) {
+    const bot = this.#value.bots.find((candidate) => candidate.platformId === platformId);
+    return bot ? structuredClone(bot) : null;
+  }
+
+  async save(value) {
+    const normalized = this.#normalizeBot(value);
+    if (!normalized) throw new Error(`Refusing to persist incomplete ${this.#channel} bot data`);
+    return this.#mutate((bots) => {
+      const identityCollision = bots.find(
+        (bot) => bot.platformId === normalized.platformId && bot.botId !== normalized.botId,
+      );
+      const refCollision = bots.find(
+        (bot) => bot.tokenRef === normalized.tokenRef && bot.botId !== normalized.botId,
+      );
+      if (identityCollision || refCollision) throw new Error(`Duplicate ${this.#channel} bot identity`);
+      const index = bots.findIndex((bot) => bot.botId === normalized.botId);
+      if (index === -1) bots.push(normalized);
+      else bots[index] = normalized;
+      return structuredClone(normalized);
+    });
+  }
+
+  async remove(botId) {
+    if (!this.#botIdPattern.test(botId)) throw new TypeError(`Invalid ${this.#channel} bot id`);
+    return this.#mutate((bots) => {
+      const index = bots.findIndex((bot) => bot.botId === botId);
+      if (index === -1) return null;
+      const [removed] = bots.splice(index, 1);
+      return structuredClone(removed);
+    });
+  }
+
+  async clear() {
+    const operation = this.#writeQueue.then(async () => {
+      try {
+        await unlink(this.#path);
+      } catch (error) {
+        if (error?.code !== 'ENOENT') throw error;
+      }
+      this.#value = EMPTY_DOCUMENT;
+    });
+    this.#writeQueue = operation.then(() => undefined, () => undefined);
+    await operation;
+  }
+
+  #normalizeBot(value) {
+    if (!value || typeof value !== 'object') return null;
+    const platformId = cleanString(value.platformId);
+    const botId = cleanString(value.botId);
+    const tokenRef = cleanString(value.tokenRef);
+    const name = cleanString(value.name);
+    if (!platformId || !botId || !tokenRef || !name
+      || !this.#botIdPattern.test(botId) || !this.#tokenRefPattern.test(tokenRef)) return null;
+    const derived = deriveTokenBotIdentity(platformId, {
+      botPrefix: this.#botPrefix,
+      tokenRefPrefix: this.#tokenRefPrefix,
+    });
+    if (derived.botId !== botId || derived.tokenRef !== tokenRef) return null;
+    return Object.freeze({
+      botId,
+      platformId,
+      tokenRef,
+      name,
+      username: cleanString(value.username),
+      createdAt: cleanString(value.createdAt) ?? new Date().toISOString(),
+      connectedAt: cleanString(value.connectedAt),
+    });
+  }
+
+  #normalizeDocument(value) {
+    if (!value || value.version !== 1 || !Array.isArray(value.bots)) return null;
+    const bots = value.bots.map((bot) => this.#normalizeBot(bot));
+    if (bots.some((bot) => bot === null)) return null;
+    const ids = new Set();
+    const platformIds = new Set();
+    const refs = new Set();
+    for (const bot of bots) {
+      if (ids.has(bot.botId) || platformIds.has(bot.platformId) || refs.has(bot.tokenRef)) return null;
+      ids.add(bot.botId);
+      platformIds.add(bot.platformId);
+      refs.add(bot.tokenRef);
+    }
+    return Object.freeze({ version: 1, bots: Object.freeze(bots) });
+  }
+
+  async #mutate(mutator) {
+    let result;
+    const operation = this.#writeQueue.then(async () => {
+      const bots = [...this.#value.bots];
+      result = mutator(bots);
+      const document = Object.freeze({ version: 1, bots: Object.freeze(bots) });
+      await this.#write(document);
+      this.#value = document;
+    });
+    this.#writeQueue = operation.then(() => undefined, () => undefined);
+    await operation;
+    return result;
+  }
+
+  async #write(document) {
+    await mkdir(dirname(this.#path), { recursive: true, mode: 0o700 });
+    const temporary = `${this.#path}.tmp`;
+    await writeFile(temporary, `${JSON.stringify(document, null, 2)}\n`, {
+      encoding: 'utf8',
+      mode: 0o600,
+    });
+    await rename(temporary, this.#path);
+  }
+}