fix(auto-reply): tighten block streaming defaults

src/agents/pi-embedded-block-chunker.ts

@@ -53,6 +53,14 @@ export class EmbeddedBlockChunker {
     const maxChars = Math.max(minChars, Math.floor(this.#chunking.maxChars));
     if (this.#buffer.length < minChars && !force) return;
 
+    if (force && this.#buffer.length <= maxChars) {
+      if (this.#buffer.trim().length > 0) {
+        emit(this.#buffer);
+      }
+      this.#buffer = "";
+      return;
+    }
+
     while (
       this.#buffer.length >= minChars ||
       (force && this.#buffer.length > 0)

src/agents/pi-embedded-subscribe.test.ts

@@ -784,7 +784,7 @@ describe("subscribeEmbeddedPiSession", () => {
       blockReplyBreak: "message_end",
       blockReplyChunking: {
         minChars: 5,
-        maxChars: 40,
+        maxChars: 25,
         breakPreference: "paragraph",
       },
     });
@@ -836,7 +836,7 @@ describe("subscribeEmbeddedPiSession", () => {
       blockReplyBreak: "message_end",
       blockReplyChunking: {
         minChars: 5,
-        maxChars: 50,
+        maxChars: 25,
         breakPreference: "paragraph",
       },
     });
@@ -939,7 +939,7 @@ describe("subscribeEmbeddedPiSession", () => {
       blockReplyBreak: "message_end",
       blockReplyChunking: {
         minChars: 5,
-        maxChars: 40,
+        maxChars: 25,
         breakPreference: "paragraph",
       },
     });
@@ -986,7 +986,7 @@ describe("subscribeEmbeddedPiSession", () => {
       blockReplyBreak: "message_end",
       blockReplyChunking: {
         minChars: 5,
-        maxChars: 45,
+        maxChars: 30,
         breakPreference: "paragraph",
       },
     });
@@ -1035,7 +1035,7 @@ describe("subscribeEmbeddedPiSession", () => {
       blockReplyBreak: "message_end",
       blockReplyChunking: {
         minChars: 10,
-        maxChars: 50,
+        maxChars: 30,
         breakPreference: "paragraph",
       },
     });