Repo

Mainplane

Open-source (MIT) agent ecosystem by Alexander Yue that replaces context compaction with context retrieval: it keeps every session's full record as a file, and when context fills up a new session starts and searches the old one for the exact lines it needs; in his ~400k-token Opus 5.5 test that took 15 s and $0.10 versus up to 38 s and $1.99 for compaction.

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Type: Repo
Category: Ai agents automation
Verified link: Checked
First found: 1 Nov 2026

Use it for

Avoid losing details when an ai agent's context fills up
Continue long coding agent sessions cheaply
Give agents searchable memory of past sessions

#memory
#ai-agent
#open-source
#coding-agent

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