# lowfat

> **TL;DR.** lowfat is a pluggable CLI output filter that sits between your shell and your AI coding agent, stripping noise from command output before the LLM reads it.

- **Category:** AI / Developer Tools / Agent Cost Optimization
- **Stage:** validating
- **Age:** 64 days
- **Origin date:** 2026-04-09
- **First detected:** 2026-06-05
- **Canonical URL:** https://earlyterms.com/term/lowfat
- **Sources:** 4 primary URLs

## Definition

lowfat is a pluggable CLI output filter that sits between your shell and your AI coding agent, stripping noise from command output before the LLM reads it. Instead of feeding an agent 10,000 lines of `kubectl get -o yaml`, lowfat passes through only what the model needs.

The tool was [published on GitHub](https://github.com/zdk/lowfat) on April 9, 2026 by developer zdk, written in Rust, and reached 127 stars within two months. Its June 5, 2026 Show HN post surfaced a real-usage benchmark: across 20 commands totaling 4.4M raw tokens, lowfat saved 91.8%, including 96% on grep and docker outputs.

## Analogy

Think of it as a spam filter for CLI output — your agent only reads the signal, not the noise.

## Why it's emerging now

AI coding agents like Claude Code and Codex burn tokens processing verbose CLI dumps — kubectl, docker, git diff — that contain 90%+ noise. lowfat addresses this by filtering output at the shell layer, a strategy validated by rtk (59k stars) and now contested by a new plugin-first approach from zdk.

## Related terms

- *competitor:* rtk
- *parent:* token-maxxing
- *parent:* tokenmaxxing
- *related:* context-engineering
- *related:* context-rot
- *related:* agent-harness
- *related:* privacy-filter
- *related:* claude-code
- *competitor:* lean-ctx
- *parent:* context-window

## Sources

1. [lowfat — official GitHub repository (zdk)](https://github.com/zdk/lowfat)
2. [Show HN: Lowfat — pluggable CLI filter that saved 91.8% of my LLM tokens](https://news.ycombinator.com/item?id=48409955)
3. [rtk — dominant CLI token-reduction proxy (59k stars)](https://github.com/rtk-ai/rtk)
4. [InfoQ: GitHub Slashes Agent Workflow Token Spend up to 62%](https://www.infoq.com/news/2026/05/github-agentic-token-savings/)

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_Generated by EarlyTerms · https://earlyterms.com/term/lowfat_