Ponytail Plugin: Make AI Agents Write Less Code and Ship Faster

Agents often overengineer simple things. For a one-line task they can generate 80 lines of code, a couple of abstractions, and a new dependency.

Yesterday they released the Ponytail plugin. It makes agents code like a lazy senior:

The best code is the code you never ended up writing.

First it checks:
1. Is this even necessary?
2. Is it already in the standard library?
3. Is there a native capability in the platform?
4. Is this already implemented in one of the dependencies?
5. Can it be done in one line?
6. Only after that does it write the minimally necessary code.

Benchmarks:
80–94% less code
47–77% cheaper
3–6× faster

Example:

the agent writes a date picker, pulls in a library, makes a wrapper, and a bunch of logic
Ponytail:

<input type="date"> <!-- ponytail: browser has one -->

Works with Hermes, Claude Code, Codex, Cursor, Antigravity, Pi Agent, OpenCode, and others.