AgentIndex icon
AgentIndex
evolver logo
evolver
★ 8.7k
vs
lean-ctx logo
lean-ctx
★ 3.9k

evolver vs lean-ctx

evolver: Evolver scans an agent's logs and memory, selects a matching Gene or Capsule from a local asset store, and emits a protocol-bound GEP prompt for the next improvement step. Each run records an auditable EvolutionEvent, and hooks wire it into Cursor, Claude Code, Codex and other runtimes.; lean-ctx: lean-ctx is an open-source MCP server designed to drastically reduce LLM token costs for AI coding tools like Claude Code, Cursor, and Copilot. It achieves this by transparently compressing CLI output and file context, offering up to 99% savings and making AI coding faster, cheaper, and more effective without changing workflows.

01

TL;DR

evolver logo
evolverMemory & Context · ★ 8.7k

Harden a flaky agent loop by enforcing validation before edits

Read evolver full review →
lean-ctx logo
lean-ctxMemory & Context · ★ 3.9k

Reducing token costs for Claude Code, Cursor, and Copilot

Read lean-ctx full review →
02

Side-by-Side Comparison

Field
evolver logoevolver
lean-ctx logolean-ctx
Category
Memory & Context
Memory & Context
Stars
★ 8.7k
★ 3.9k
License
GPL-3.0
MIT
Install Command
npm install -g @evomap/evolver
curl -fsSL https://leanctx.com/install.sh | sh && lean-ctx setup && lean-ctx doctor
Updated
1d ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
agent-evolution, gep-protocol, self-improvement
agentic-coding, ai, ai-coding
03

Features

evolver logoevolver
01Scans memory and history files for errors and recurring patterns
02Encodes reusable fixes as Genes and Capsules under the GEP protocol
03Writes an auditable EvolutionEvent for every run
04Review mode and strategy presets such as balanced, harden and repair-only
05setup-hooks for Cursor, Claude Code, Codex and Kiro
lean-ctx logolean-ctx
01Transparent shell hook for CLI output compression
02Context server with 28 intelligent tools
03One-command integration for AI coding agents
04Adaptive LLM communication with Cognitive Efficiency Protocol
05Cross-session memory for context continuity
04

Use Cases

evolver logoevolver
↳Harden a flaky agent loop by enforcing validation before edits
↳Turn recurring fixes into reusable evolution assets
↳Keep an audit trail of agent prompt changes for review or compliance
lean-ctx logolean-ctx
↳Reducing token costs for Claude Code, Cursor, and Copilot
↳Optimizing MCP server performance
↳Saving $30-100+ per month on AI coding API costs
FAQ

FAQ

What is the difference between evolver and lean-ctx?
Both evolver and lean-ctx are in the Memory & Context category. evolver has 8.7k stars, while lean-ctx has 3.9k stars.
Which is better, evolver or lean-ctx?
The best choice depends on your use case. Choose evolver if Harden a flaky agent loop by enforcing validation before edits, and lean-ctx if Reducing token costs for Claude Code, Cursor, and Copilot.
Is evolver free or open source?
Yes, evolver is open source on GitHub (GPL-3.0).
Is lean-ctx free or open source?
Yes, lean-ctx is open source on GitHub (MIT).
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Related

Alternatives to evolver →Alternatives to lean-ctx →evolver details →lean-ctx details →