ContextPruner

Your coding agent is reading junk files.
That’s why it keeps looping.

When Cursor rewrites the same component for the fourth time, the model usually isn’t the problem. It’s re-reading 900KB of lockfiles and dist folders on every prompt, and your task is getting crowded out. ContextPruner writes the config files that tell it what to skip.

No signup needed. Your file list stays in your browser — we never see it.

Paste manifest

or

Paste your repo’s file manifest to watch the triage run — and see what the junk is costing you.

Your AGENTS.md, CLAUDE.md, GEMINI.md, Cursor rules, and Copilot instructions will appear here.
Free tier runs 100% in your browser. Your file list never touches our servers.

Works with your whole toolchain

One paste generates the exact instruction file every major coding agent reads — including the cross-agent AGENTS.md standard that 19 of them support natively.

Cursor

Anysphere
IDE
.cursor/rules/*.mdc
AGENTS.md ✓Free · Pro from $20/mo
Docs ↗

GitHub Copilot

GitHub
IDE
.github/copilot-instructions.md
AGENTS.md ✓Free · Pro from $10/mo
Docs ↗

Claude Code

Anthropic
CLI
CLAUDE.md
Pro from $20/mo or API usage

Does not read AGENTS.md; bridge with an `@AGENTS.md` import inside CLAUDE.md or a symlink.

Docs ↗

Codex

OpenAI
CLI
AGENTS.md
AGENTS.md ✓ChatGPT Plus from $20/mo or API usage
Docs ↗

Gemini CLI

Google
CLI
GEMINI.md
Free (1,000 requests/day)

Reads AGENTS.md only via `{"context": {"fileName": "AGENTS.md"}}` in .gemini/settings.json.

Docs ↗

Antigravity

Google
IDE
GEMINI.md
AGENTS.md ✓Free tier
Docs ↗

Devin Desktop (Windsurf)

Cognition
IDE
.devin/rules/*.md
AGENTS.md ✓Free · Pro from $20/mo
Docs ↗

Cline

Cline Bot
IDE
.clinerules/
AGENTS.md ✓Free · bring your own API key
Docs ↗

Kilo Code

Kilo
IDE
.kilocode/rules/
AGENTS.md ✓Free · bring your own API key
Docs ↗

Aider

Open source
CLI
CONVENTIONS.md
Free · bring your own API key

Add `read: AGENTS.md` to .aider.conf.yml to auto-load rules.

Docs ↗

Zed

Zed Industries
IDE
AGENTS.md
AGENTS.md ✓Free · Pro from $10/mo
Docs ↗

Junie

JetBrains
IDE
.junie/AGENTS.md
AGENTS.md ✓AI Pro from $10/mo
Docs ↗

Kiro

AWS
IDE
.kiro/steering/*.md
AGENTS.md ✓Free · Pro from $20/mo
Docs ↗

Amp

Sourcegraph
CLI
AGENTS.md
AGENTS.md ✓Usage-based credits
Docs ↗

OpenCode

SST
CLI
AGENTS.md
AGENTS.md ✓Free · bring your own API key
Docs ↗

Devin

Cognition
Cloud
AGENTS.md
AGENTS.md ✓From ~$20/mo + usage
Docs ↗

Factory droid

Factory
CLI
AGENTS.md
AGENTS.md ✓Pro from $20/mo
Docs ↗

Warp

Warp
CLI
AGENTS.md
AGENTS.md ✓Free · Pro tiers
Docs ↗

goose

Block
CLI
AGENTS.md
AGENTS.md ✓Free, open source
Docs ↗

Crush

Charm
CLI
AGENTS.md
AGENTS.md ✓Free, open source
Docs ↗

Bolt.new

StackBlitz
Web builder
agents.md
AGENTS.md ✓Free · Pro from $25/mo
Docs ↗

Lovable

Lovable
Web builder
AGENTS.md
AGENTS.md ✓Free · Pro from $25/mo

Also reads CLAUDE.md and in-app Knowledge settings.

Docs ↗

Replit Agent

Replit
Web builder
replit.md
Core from $25/mo

Replit Agent maintains replit.md itself — paste rules into it or use in-app instructions.

Docs ↗

v0

Vercel
Web builder
(in-app Instructions)
Free · Premium from $20/mo

No repo instruction file — paste rules into v0's project Instructions.

Docs ↗

Pricing shown is indicative, as of July 2026 — check each vendor's docs for current tiers.

The momentum killer

Agents go in circles when they spend their attention on lockfiles, build output, and vendored dependencies instead of your task. Tell them which files to skip and the loop usually breaks on the next session.

The $33.75-a-month lockfile

You are paying $3.00 per million tokens to show a reasoning model your pnpm-lock.yaml. A 900KB lockfile is about 225,000 tokens. Even leaking into 5% of each prompt’s context, that one file costs $33.75 a month at 50 prompts a day, and the model learns nothing about your code from it.

Week 6 repo entropy

A repo that started at 40 files is 4,000 by week six, with three abandoned components-old/ folders the agent still reads. You ask for a button color change and it refactors your auth. Paste your file tree once and the config files point it back at your real code.

Free where it builds trust. Paid where it saves time.

Free

$0forever

The full triage intelligence, in your browser.

  • Unlimited manifest triage — 100% client-side
  • Five config files: AGENTS.md, CLAUDE.md, GEMINI.md, Cursor .mdc rules, copilot-instructions.md
  • Estimated monthly savings counter with live model pricing
  • No signup, no upload, no telemetry on your file list
Start pruning →

Pro

$9per month

Set-and-forget sync on every commit.

  • Drop-in GitHub Action + git pre-commit hook
  • Config files auto-regenerate on every push
  • Zero-trust: we never hold repo write tokens — your runner commits
  • API key management + lifetime savings stats
Get your API key — $9/mo