fix: isolate Slack thread sessions (#758)

src/config/schema.ts

@@ -202,6 +202,8 @@ const FIELD_LABELS: Record<string, string> = {
   "channels.discord.token": "Discord Bot Token",
   "channels.slack.botToken": "Slack Bot Token",
   "channels.slack.appToken": "Slack App Token",
+  "channels.slack.thread.historyScope": "Slack Thread History Scope",
+  "channels.slack.thread.inheritParent": "Slack Thread Parent Inheritance",
   "channels.signal.account": "Signal Account",
   "channels.imessage.cliPath": "iMessage CLI Path",
   "plugins.enabled": "Enable Plugins",
@@ -243,6 +245,10 @@ const FIELD_HELP: Record<string, string> = {
   "tools.web.fetch.userAgent": "Override User-Agent header for web_fetch requests.",
   "channels.slack.allowBots":
     "Allow bot-authored messages to trigger Slack replies (default: false).",
+  "channels.slack.thread.historyScope":
+    'Scope for Slack thread history context ("thread" isolates per thread; "channel" reuses channel history).',
+  "channels.slack.thread.inheritParent":
+    "If true, Slack thread sessions inherit the parent channel transcript (default: false).",
   "auth.profiles": "Named auth profiles (provider + mode + optional email).",
   "auth.order": "Ordered auth profile IDs per provider (used for automatic failover).",
   "auth.cooldowns.billingBackoffHours":

src/config/types.slack.ts

@@ -60,6 +60,13 @@ export type SlackSlashCommandConfig = {
   ephemeral?: boolean;
 };
 
+export type SlackThreadConfig = {
+  /** Scope for thread history context (thread|channel). Default: thread. */
+  historyScope?: "thread" | "channel";
+  /** If true, thread sessions inherit the parent channel transcript. Default: false. */
+  inheritParent?: boolean;
+};
+
 export type SlackAccountConfig = {
   /** Optional display name for this account (used in CLI/UI lists). */
   name?: string;
@@ -101,6 +108,8 @@ export type SlackAccountConfig = {
   reactionAllowlist?: Array<string | number>;
   /** Control reply threading when reply tags are present (off|first|all). */
   replyToMode?: ReplyToMode;
+  /** Thread session behavior. */
+  thread?: SlackThreadConfig;
   actions?: SlackActionConfig;
   slashCommand?: SlackSlashCommandConfig;
   dm?: SlackDmConfig;

src/config/zod-schema.providers-core.ts

@@ -203,6 +203,11 @@ export const SlackChannelSchema = z.object({
   systemPrompt: z.string().optional(),
 });
 
+export const SlackThreadSchema = z.object({
+  historyScope: z.enum(["thread", "channel"]).optional(),
+  inheritParent: z.boolean().optional(),
+});
+
 export const SlackAccountSchema = z.object({
   name: z.string().optional(),
   capabilities: z.array(z.string()).optional(),
@@ -224,6 +229,7 @@ export const SlackAccountSchema = z.object({
   reactionNotifications: z.enum(["off", "own", "all", "allowlist"]).optional(),
   reactionAllowlist: z.array(z.union([z.string(), z.number()])).optional(),
   replyToMode: ReplyToModeSchema.optional(),
+  thread: SlackThreadSchema.optional(),
   actions: z
     .object({
       reactions: z.boolean().optional(),