fix(discord): default non-finite chunk limits

extensions/discord/src/chunk.test.ts

@@ -14,6 +14,18 @@ describe("chunkDiscordText", () => {
     }
   });
 
+  it("uses default chunk limits for non-finite options", () => {
+    const text = "x".repeat(2500);
+    const chunks = chunkDiscordText(text, {
+      maxChars: Number.NaN,
+      maxLines: Number.POSITIVE_INFINITY,
+    });
+
+    expect(chunks.length).toBeGreaterThan(1);
+    expect(chunks.every((chunk) => chunk.length <= 2000)).toBe(true);
+    expect(chunks.join("")).toBe(text);
+  });
+
   it("keeps fenced code blocks balanced across chunks", () => {
     const body = Array.from({ length: 30 }, (_, i) => `console.log(${i});`).join("\n");
     const text = `Here is code:\n\n\`\`\`js\n${body}\n\`\`\`\n\nDone.`;
@@ -40,6 +52,19 @@ describe("chunkDiscordText", () => {
     expect(chunks).toEqual([text]);
   });
 
+  it("uses default newline chunk limits for non-finite max chars", () => {
+    const text = "x".repeat(2500);
+    const chunks = chunkDiscordTextWithMode(text, {
+      maxChars: Number.NaN,
+      maxLines: 50,
+      chunkMode: "newline",
+    });
+
+    expect(chunks.length).toBeGreaterThan(1);
+    expect(chunks.every((chunk) => chunk.length <= 2000)).toBe(true);
+    expect(chunks.join("")).toBe(text);
+  });
+
   it("reserves space for closing fences when chunking", () => {
     const body = "a".repeat(120);
     const text = `\`\`\`txt\n${body}\n\`\`\``;

extensions/discord/src/chunk.ts

@@ -1,3 +1,4 @@
+import { resolveIntegerOption } from "openclaw/plugin-sdk/number-runtime";
 import { chunkMarkdownTextWithMode, type ChunkMode } from "openclaw/plugin-sdk/reply-chunking";
 
 type ChunkDiscordTextOpts = {
@@ -24,6 +25,10 @@ const DEFAULT_MAX_LINES = 17;
 const FENCE_RE = /^( {0,3})(`{3,}|~{3,})(.*)$/;
 const CJK_PUNCTUATION_BREAK_AFTER_RE = /[、。，．！？；：）］｝〉》」』】〕〗〙]/u;
 
+function resolveDiscordChunkLimit(value: unknown, fallback: number) {
+  return resolveIntegerOption(value, fallback, { min: 1 });
+}
+
 function countLines(text: string) {
   if (!text) {
     return 0;
@@ -114,7 +119,7 @@ function splitLongLine(
   maxChars: number,
   opts: { preserveWhitespace: boolean },
 ): string[] {
-  const limit = Math.max(1, Math.floor(maxChars));
+  const limit = resolveDiscordChunkLimit(maxChars, DEFAULT_MAX_CHARS);
   if (line.length <= limit) {
     return [line];
   }
@@ -150,8 +155,8 @@ function splitLongLine(
  * while keeping fenced code blocks balanced across chunks.
  */
 export function chunkDiscordText(text: string, opts: ChunkDiscordTextOpts = {}): string[] {
-  const maxChars = Math.max(1, Math.floor(opts.maxChars ?? DEFAULT_MAX_CHARS));
-  const maxLines = Math.max(1, Math.floor(opts.maxLines ?? DEFAULT_MAX_LINES));
+  const maxChars = resolveDiscordChunkLimit(opts.maxChars, DEFAULT_MAX_CHARS);
+  const maxLines = resolveDiscordChunkLimit(opts.maxLines, DEFAULT_MAX_LINES);
 
   const body = text ?? "";
   if (!body) {
@@ -262,7 +267,7 @@ export function chunkDiscordTextWithMode(
   }
   const lineChunks = chunkMarkdownTextWithMode(
     text,
-    Math.max(1, Math.floor(opts.maxChars ?? DEFAULT_MAX_CHARS)),
+    resolveDiscordChunkLimit(opts.maxChars, DEFAULT_MAX_CHARS),
     "newline",
   );
   const chunks: string[] = [];