petya
75601988c2
- Cover, TOC, 5 dividers, 3 recap slides - 5 sections (chains, langgraph, deepagents, openswe, ecosystem) - design-system.js with theme tokens + 9 helper functions - research/: timeline + sources + per-tech notes - final-compile.js + merge.js for rebuild pipeline - output/: langchain-evolution.pptx (2.3 MB) + langchain-evolution.pdf (1.1 MB) + 7 sample previews
58 lines
1.9 KiB
JavaScript
58 lines
1.9 KiB
JavaScript
// Slide 21: Short-term memory -- thread_id + checkpointer
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// Code slide: persistent conversation per thread.
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const ds = require('./design-system');
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function createSlide(pres, theme) {
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const slide = pres.addSlide();
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ds.helpers.slideBase(slide, pres, theme);
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ds.helpers.addHeader(slide, pres, theme, {
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eyebrow: 'STAGE 1: CHAINS',
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section: 'Memory',
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title: 'Краткосрочная память: thread + checkpointer',
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sectionNumber: 1,
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});
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ds.helpers.addCodeBlock(slide, pres, theme, {
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x: 0.5, y: 1.5, w: 9.0, h: 3.25,
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language: 'python',
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filePath: 'examples/memory_short.py',
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code: [
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'from langchain.agents import create_agent',
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'from langgraph.checkpoint.memory import InMemorySaver',
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'',
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'checkpointer = InMemorySaver()',
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'',
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'agent = create_agent(',
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' model="openai:gpt-4.1-mini",',
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' tools=[...],',
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' checkpointer=checkpointer, # <-- persistent state',
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')',
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'',
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'config = {"configurable": {"thread_id": "user-42"}}',
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'',
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'# Первый turn',
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'agent.invoke({"messages": [{"role": "user",',
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' "content": "My name is Alice."}]}, config=config)',
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'',
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'# Второй turn -- модель помнит имя',
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'result = agent.invoke({"messages": [{"role": "user",',
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' "content": "What is my name?"}]}, config=config)',
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'print(result["messages"][-1].content) # "Alice"',
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].join('\n'),
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});
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ds.helpers.addCallout(slide, pres, theme, {
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x: 0.5, y: 4.85, w: 9.0, h: 0.3,
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kind: 'success',
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text: 'InMemorySaver для dev. Для прода -- PostgresSaver / RedisSaver (те же LangGraph checkpointer-ы).',
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});
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ds.helpers.addSourceLine(slide, pres, theme, {
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source: 'docs.langchain.com/oss/python/langgraph/persistence',
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});
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ds.helpers.addPageNumber(slide, pres, theme, 21);
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}
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module.exports = { createSlide }; |