refactor(auto-reply): split reply flow

src/auto-reply/reply/block-streaming.ts

@@ -0,0 +1,51 @@
+import type { ClawdisConfig } from "../../config/config.js";
+import { resolveTextChunkLimit, type TextChunkSurface } from "../chunk.js";
+
+const DEFAULT_BLOCK_STREAM_MIN = 800;
+const DEFAULT_BLOCK_STREAM_MAX = 1200;
+
+const BLOCK_CHUNK_SURFACES = new Set<TextChunkSurface>([
+  "whatsapp",
+  "telegram",
+  "discord",
+  "signal",
+  "imessage",
+  "webchat",
+]);
+
+function normalizeChunkSurface(surface?: string): TextChunkSurface | undefined {
+  if (!surface) return undefined;
+  const cleaned = surface.trim().toLowerCase();
+  return BLOCK_CHUNK_SURFACES.has(cleaned as TextChunkSurface)
+    ? (cleaned as TextChunkSurface)
+    : undefined;
+}
+
+export function resolveBlockStreamingChunking(
+  cfg: ClawdisConfig | undefined,
+  surface?: string,
+): {
+  minChars: number;
+  maxChars: number;
+  breakPreference: "paragraph" | "newline" | "sentence";
+} {
+  const surfaceKey = normalizeChunkSurface(surface);
+  const textLimit = resolveTextChunkLimit(cfg, surfaceKey);
+  const chunkCfg = cfg?.agent?.blockStreamingChunk;
+  const maxRequested = Math.max(
+    1,
+    Math.floor(chunkCfg?.maxChars ?? DEFAULT_BLOCK_STREAM_MAX),
+  );
+  const maxChars = Math.max(1, Math.min(maxRequested, textLimit));
+  const minRequested = Math.max(
+    1,
+    Math.floor(chunkCfg?.minChars ?? DEFAULT_BLOCK_STREAM_MIN),
+  );
+  const minChars = Math.min(minRequested, maxChars);
+  const breakPreference =
+    chunkCfg?.breakPreference === "newline" ||
+    chunkCfg?.breakPreference === "sentence"
+      ? chunkCfg.breakPreference
+      : "paragraph";
+  return { minChars, maxChars, breakPreference };
+}