Assertion Supported AI assessment confidence: 95% certainty 4/5 debate potential 1/5

Manus, Claude Code, and Deep Research share four core architectural primitives

Harrison Chase · Everything Gets Rebuilt: The New AI Agent Stack | Harrison Chase, LangChain · Mar 12, 2026 · at 18:24

Harrison Chase, CEO of LangChain, explains that analyzing systems like Manus, Claude Code, and Deep Research inspired LangChain's DeepAgents package.

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“We saw Manus, we saw Cloud Code, we saw Deep Research, they all had these four things and we were like, okay, that's pretty common, let's put it into a Python package and make it easy for people to build their own versions of that.”

quote is from the automated transcript, cleaned for reading: filler sounds and stutters are removed, nothing is rephrased. names can be misheard (the analysis reads context, assessments check outside sources). how →

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Insight
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Harrison Chase Mar 12, 2026 ▶ 8:10 Everything Gets Rebuilt: The New AI Agent Stack | Harrison Chase, LangChain
Prediction Not checkable as stated
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Assertion Supported
Anthropic's Claude Code uses custom harness tools over model-level RL tools
“It doesn't actually use the tools that are RL into the model. So like anthropic models have some like file editing tools. They have a completely different set of tools in, in the actual harness.”
Harrison Chase Mar 12, 2026 ▶ 7:55 Everything Gets Rebuilt: The New AI Agent Stack | Harrison Chase, LangChain
Disclosure
LangChain adds tools for AI agents to autonomously trigger context compaction
“One interesting thing there, actually, that we haven't yet released as of this recording, but will probably be released by the time it comes out, is we actually give the agent a tool to trigger its own compaction.”
Harrison Chase Mar 12, 2026 ▶ 22:01 Everything Gets Rebuilt: The New AI Agent Stack | Harrison Chase, LangChain
Prediction Not checkable as stated
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Harrison Chase Mar 12, 2026 ▶ 26:58 Everything Gets Rebuilt: The New AI Agent Stack | Harrison Chase, LangChain
Insight
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Harrison Chase Mar 12, 2026 ▶ 45:53 Everything Gets Rebuilt: The New AI Agent Stack | Harrison Chase, LangChain
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