tanstack/ai · .claude/skills/ponytail/SKILL.md

ponytail skillA

ponytail is agent-read markdown (skill) from tanstack/ai: Forces the laziest solution that actually works, simplest, shortest, most minimal. Channels a senior dev who has seen everything: question whether the task needs to exist at all (YAGNI), reach for the standard library before custom code, native platform features before dependencies, one line before fifty. Supports intensity levels: lite, full (default), ultra. Use whenever the user says "ponytail", "be lazy", "lazy mode", "simplest solution", "minimal solution", "yagni", "do less", or "shortest .

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add tanstack/ai/ponytail@git:20260820.9ac4a38
Exact content
mdr add tanstack/ai/ponytail@sha256:f59aeb1c1fbc9af7

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_vl2tchqpzj5rz4yh.svg)](https://markdownregistry.com/a/art_vl2tchqpzj5rz4yh)

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Versions

versioncommittedcommitsizeaudit
git:20260820.9ac4a38 latest2026-08-20 9ac4a38 5,514 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (5514 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

tanstack/ai · 3,121 stars · license MIT · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_vl2tchqpzj5rz4yh
GET https://markdownregistry.com/api/v1/resolve?ref=tanstack/ai/ponytail
GET https://markdownregistry.com/api/v1/blob/f59aeb1c1fbc9af71afec2e92c3200d4b6e69ffd134e69bf9c690c1330d823d4

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.