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RuleStack

Configs

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Compare

Diff

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RuleStack

Configs

Stacks

Compare

Diff

Read API

Compare two configs

Pick any two indexed files. RuleStack shows which sections, commands and section tags each one has that the other does not, then the line diff underneath.

Slugs are the last part of a config URL. Every config page also links straight to a diff against its siblings, which is usually the comparison worth running.

Repositories carrying both AGENTS.md and CLAUDE.md

The question these answer: when a project ships two instruction files, is the second one written for a different reader, or pasted from the first?

vinta/awesome-python

313k
AGENTS.mdCLAUDE.md
243 vs 219 wordsCompare

affaan-m/ECC

239k
AGENTS.mdCLAUDE.md
1205 vs 532 wordsCompare

firecrawl/firecrawl

163k
AGENTS.mdCLAUDE.md
247 vs 277 wordsCompare

langflow-ai/langflow

153k
AGENTS.mdCLAUDE.md
1402 vs 55 wordsCompare

langchain-ai/langchain

144k
AGENTS.mdCLAUDE.md
2510 vs 2510 wordsCompare

garrytan/gstack

127k
AGENTS.mdCLAUDE.md
1149 vs 8271 wordsCompare

browser-use/browser-use

108k
AGENTS.mdCLAUDE.md
4662 vs 1574 wordsCompare

louislam/uptime-kuma

90k
AGENTS.mdCLAUDE.md
389 vs 389 wordsCompare

ruvnet/RuView

89k
AGENTS.mdCLAUDE.md
1018 vs 1279 wordsCompare

localsend/localsend

87k
AGENTS.mdCLAUDE.md
1348 vs 42 wordsCompare

addyosmani/agent-skills

84k
AGENTS.mdCLAUDE.md
720 vs 508 wordsCompare

ruvnet/ruflo

67k
AGENTS.mdCLAUDE.md
3327 vs 8575 wordsCompare

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© 2026 RuleStack. A Kynth Studios product. Changelog

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The studio list

One product, taken apart, once a month

Kynth Studios pulls one shipped product open every month — what it does, what it cost to build, what the pipeline behind it looks like, and what the numbers did. One email a month, nothing in between.

Double opt-in — we send one confirmation link and nothing else until you click it.

RuleStack

Built by

Kynth Studios

the studio behind ToolDrift, StillShipping and BlockDex

part of Toolproof, the measurement layer for AI agent tooling

Directory

Configs
Stacks
Compare formats
AGENTS.md vs CLAUDE.md
Cursor rules alternatives
Diff two configs
Best AGENTS.md examples
Best Cursor rules examples
What goes in a CLAUDE.md

Formats

AGENTS.md
CLAUDE.md
Cursor rules
Copilot instructions

Reference

Read API
Corpus health
Privacy Policy
Terms

© 2026 RuleStack. A Kynth Studios product. Changelog

RuleStack

The studio list

One product, taken apart, once a month

Kynth Studios pulls one shipped product open every month — what it does, what it cost to build, what the pipeline behind it looks like, and what the numbers did. One email a month, nothing in between.

Double opt-in — we send one confirmation link and nothing else until you click it.

RuleStack

Built by

Kynth Studios

the studio behind ToolDrift, StillShipping and BlockDex

part of Toolproof, the measurement layer for AI agent tooling

Directory

Configs
Stacks
Compare formats
AGENTS.md vs CLAUDE.md
Cursor rules alternatives
Diff two configs
Best AGENTS.md examples
Best Cursor rules examples
What goes in a CLAUDE.md

Formats

AGENTS.md
CLAUDE.md
Cursor rules
Copilot instructions

Reference

Read API
Corpus health
Privacy Policy
Terms

© 2026 RuleStack. A Kynth Studios product. Changelog

RuleStack