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Fix newline chunkMode block streaming to preserve single-newline paragraphs

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This commit is contained in:
Tyler Yust
2026-01-24 23:18:58 -08:00
committed by Peter Steinberger
parent 03e9a076b8
commit 46fa1c1301
1 changed files with 8 additions and 15 deletions
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23
src/auto-reply/reply/block-streaming.ts
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@@ -7,7 +7,7 @@ import {
INTERNAL_MESSAGE_CHANNEL,
listDeliverableMessageChannels,
} from "../../utils/message-channel.js";
import { resolveChunkMode, resolveTextChunkLimit, type TextChunkProvider } from "../chunk.js";
import { resolveTextChunkLimit, type TextChunkProvider } from "../chunk.js";
const DEFAULT_BLOCK_STREAM_MIN = 800;
const DEFAULT_BLOCK_STREAM_MAX = 1200;
@@ -69,15 +69,11 @@ export function resolveBlockStreamingChunking(
});
const chunkCfg = cfg?.agents?.defaults?.blockStreamingChunk;
// When chunkMode is "newline", use newline-based streaming
const channelChunkMode = resolveChunkMode(cfg, providerKey, accountId);
if (channelChunkMode === "newline") {
// For newline mode: use very low minChars to flush quickly on newlines
const minChars = Math.max(1, Math.floor(chunkCfg?.minChars ?? 1));
const maxRequested = Math.max(1, Math.floor(chunkCfg?.maxChars ?? textLimit));
const maxChars = Math.max(1, Math.min(maxRequested, textLimit));
return { minChars, maxChars, breakPreference: "newline" };
}
// Note: chunkMode="newline" used to imply splitting on each newline, but outbound
// delivery now treats it as paragraph-aware chunking (only split on blank lines).
// Block streaming should follow the same rule, so we do NOT special-case newline
// mode here.
// (chunkMode no longer alters block streaming behavior)
const maxRequested = Math.max(1, Math.floor(chunkCfg?.maxChars ?? DEFAULT_BLOCK_STREAM_MAX));
const maxChars = Math.max(1, Math.min(maxRequested, textLimit));
@@ -103,11 +99,8 @@ export function resolveBlockStreamingCoalescing(
): BlockStreamingCoalescing | undefined {
const providerKey = normalizeChunkProvider(provider);
// When chunkMode is "newline", disable coalescing to send each line immediately
const channelChunkMode = resolveChunkMode(cfg, providerKey, accountId);
if (channelChunkMode === "newline") {
return undefined;
}
// Note: chunkMode="newline" is paragraph-aware in outbound delivery (blank-line splits),
// so block streaming should not disable coalescing or flush per single newline.
const providerId = providerKey ? normalizeChannelId(providerKey) : null;
const providerChunkLimit = providerId