fix: polish reply threading + tool dedupe (thanks @mneves75) (#326)

src/auto-reply/reply/reply-threading.ts

@@ -0,0 +1,36 @@
+import type { ClawdbotConfig } from "../../config/config.js";
+import type { ReplyToMode } from "../../config/types.js";
+import type { OriginatingChannelType } from "../templating.js";
+import type { ReplyPayload } from "../types.js";
+
+export function resolveReplyToMode(
+  cfg: ClawdbotConfig,
+  channel?: OriginatingChannelType,
+): ReplyToMode {
+  switch (channel) {
+    case "telegram":
+      return cfg.telegram?.replyToMode ?? "first";
+    case "discord":
+      return cfg.discord?.replyToMode ?? "off";
+    case "slack":
+      return cfg.slack?.replyToMode ?? "off";
+    default:
+      return "all";
+  }
+}
+
+export function createReplyToModeFilter(mode: ReplyToMode) {
+  let hasThreaded = false;
+  return (payload: ReplyPayload): ReplyPayload => {
+    if (!payload.replyToId) return payload;
+    if (mode === "off") {
+      return { ...payload, replyToId: undefined };
+    }
+    if (mode === "all") return payload;
+    if (hasThreaded) {
+      return { ...payload, replyToId: undefined };
+    }
+    hasThreaded = true;
+    return payload;
+  };
+}