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✨ feat(prompts): use XML format for topic title generation to improve DeepSeek compatibility#15413

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arvinxx merged 2 commits into
lobehub:canaryfrom
hardy-one:feat/summary-title-xml
Jun 4, 2026
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✨ feat(prompts): use XML format for topic title generation to improve DeepSeek compatibility#15413
arvinxx merged 2 commits into
lobehub:canaryfrom
hardy-one:feat/summary-title-xml

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@hardy-one

@hardy-one hardy-one commented Jun 2, 2026

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💻 Change Type

  • ✨ feat
  • 🐛 fix
  • ♻️ refactor
  • 💄 style
  • 👷 build
  • ⚡️ perf
  • ✅ test
  • 📝 docs
  • 🔨 chore

🔗 Related Issue

🔀 Description of Change

DeepSeek V4 Flash/Pro 等模型在生成会话标题时，会忽略 system prompt 的指令，将标题生成任务误认为是对话任务。

使用 XML 结构化 prompt，在 user message 中用 <task> 块明确指令，用 <conversation> 块包裹对话内容，提升模型对指令的遵循率。

🧪 How to Test

  • Tested locally
  • Added/updated tests
  • No tests needed

📸 Screenshots / Videos

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... ...

📝 Additional Information

@vercel

vercel Bot commented Jun 2, 2026

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@hardy-one is attempting to deploy a commit to the LobeHub OSS Team on Vercel.

A member of the Team first needs to authorize it.

@dosubot dosubot Bot added size:M This PR changes 30-99 lines, ignoring generated files. provider:deepseek labels Jun 2, 2026
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We've reviewed this pull request using the Sourcery rules engine

@lobehubbot

lobehubbot commented Jun 2, 2026

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@tjx666 - This PR improves DeepSeek model compatibility for topic title generation by switching to XML-structured prompts. Please take a look.

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Comment thread packages/prompts/src/chains/summaryTitle.ts
@codecov

codecov Bot commented Jun 2, 2026 •
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Codecov Report

❌ Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 71.02%. Comparing base (2eb9e34) to head (0c33461).

Additional details and impacted files 
@@           Coverage Diff            @@
##           canary   #15413    +/-   ##
========================================
  Coverage   71.02%   71.02%            
========================================
  Files        3212     3212            
  Lines      321285   321290     +5     
  Branches    29240    28292   -948     
========================================
+ Hits       228179   228185     +6     
+ Misses      92931    92929     -2     
- Partials      175      176     +1
Flag Coverage Δ
app 61.84% <ø> (+<0.01%) ⬆️
database 92.49% <ø> (ø)
packages/agent-runtime 80.48% <ø> (ø)
packages/builtin-tool-lobe-agent 18.52% <ø> (ø)
packages/context-engine 84.17% <ø> (ø)
packages/conversation-flow 91.29% <ø> (ø)
packages/file-loaders 87.89% <ø> (ø)
packages/memory-user-memory 74.99% <ø> (ø)
packages/model-bank 99.99% <ø> (ø)
packages/model-runtime 84.72% <ø> (ø)
packages/prompts 72.51% <94.11%> (+0.01%) ⬆️
packages/python-interpreter 92.90% <ø> (ø)
packages/ssrf-safe-fetch 0.00% <ø> (ø)
packages/types 35.36% <ø> (ø)
packages/utils 88.69% <ø> (ø)
packages/web-crawler 88.08% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components Coverage Δ
Store 68.43% <ø> (ø)
Services 54.58% <ø> (ø)
Server 72.32% <ø> (+<0.01%) ⬆️
Libs 57.01% <ø> (ø)
Utils 81.44% <ø> (ø)
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@arvinxx arvinxx merged commit 7f3f127 into lobehub:canary Jun 4, 2026
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@lobehubbot

lobehubbot commented Jun 4, 2026

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❤️ Great PR @hardy-one ❤️

The growth of project is inseparable from user feedback and contribution, thanks for your contribution! If you are interesting with the lobehub developer community, please join our discord and then dm @arvinxx or @canisminor1990. They will invite you to our private developer channel. We are talking about the lobe-chat development or sharing ai newsletter around the world.

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