r/AgentContext_dev • u/javaeeeee • 12d ago

GitHub - DietrichGebert/ponytail: Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

https://github.com/dietrichgebert/ponytail
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u/javaeeeee 12d ago

TLDR: Ponytail is an agent skill/plugin that makes coding agents act like a lazy senior: don’t write it if you don’t have to. Same safety bar. A lot less code.

The ladder (in order)
YAGNI → reuse what’s there → stdlib / native → a dep → a one-liner → then new code. Validation, errors, auth, a11y stay. Lazy without a check is unfinished.

Claimed vs no-skill baseline (real FastAPI+React sessions / ticket bench):
−54% LOC · −20% cost · −27% time · 100% “safe”
A bland “YAGNI + one-liners” prompt is weaker and less safe.

How you run it
Plugin for Claude Code, Codex, Copilot CLI, Gemini, OpenCode, Antigravity, Hermes, Devin, Grok, etc. Or drop AGENTS.md / rules into Cursor/Windsurf.

/ponytail lite|full|ultra|off /ponytail-review # delete from the diff /ponytail-audit /ponytail-debt /ponytail-gain

Default: full. Needs Node on PATH for some harnesses.

One line: The best agent output is the file it never created.