flatten-mcp - Resume Claude Sessions 61% Cheaper

Resume Claude Code sessions 61% lighter while keeping your conversation intact

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Added Jul 2026

github.com

Mcp DeveloperFreemcp-developer

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What is Flatten Mcp?

flatten-mcp reduces Claude Code session token usage by 61% by flattening session history and removing redundant context. It allows developers to resume long coding sessions with the same conversation intact but at a fraction of the original token cost, eliminating repeated transmission of already-processed files and conclusions across multiple turns.

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Key Features of Flatten Mcp

Session flattening to reduce token bloat
Lossless context preservation
Compatible with Claude Code plugin
CLI and API access
Docker support
MCP protocol integration
Stdin/stdout CLI interface
Live session flattening
Test suite with vitest

Who Should Use Flatten Mcp?

Reduce token costs for long-running Claude Code sessions

Resume development sessions without losing conversation history

Optimize LLM resource usage for multi-turn coding tasks

Reduce API costs for extended Claude interactions

Flatten Mcp: Pros & Cons

✓Pros

Significant token reduction (61% in documented example)
Maintains exact conversation history
Works transparently with existing Claude Code workflow
Open source and actively maintained
Supports multiple platforms (macOS, Linux, Windows, WSL2)
No lossy compression of important context

Frequently Asked Questions about Flatten Mcp

What problem does flatten-mcp solve?

It reduces token usage in long Claude Code sessions by flattening redundant context, allowing you to resume sessions at 61% lower token cost while maintaining the exact same conversation.

How much does it cost?

flatten-mcp is free and open source under the MIT license.

What platforms does it support?

It works on macOS, Linux, Windows, and WSL2.

Does flattening lose any conversation history?

No, it is lossless — every line of your conversation remains intact when you resume.