Agent skill · software engineering · dietrichgebert
ponytail-gain
Show ponytail measured impact as a scoreboard: less code, less cost, more speed, from the benchmark medians. One-shot display.
Why this skill is useful
Adds a niche tool for benchmarking code efficiency that the AI wouldn't generate on its own.
What it needs
Requires ponytail installed locally. About 1k tokens when loaded. Last updated 2026-07-15. 97,533 stars on the source repository.
What this skill does
Ponytail Gain Display this scoreboard when invoked. One-shot: do NOT change mode, write flag files, or persist anything. The figures are the published benchmark medians (5 everyday tasks: email validator, debounce, CSV sum, countdown timer, rate limiter; three models: Haiku, Sonnet, Opus). They are measured, not computed from the current repo. Source: benchmarks/ and the README. Scoreboard Render plain ASCII bars. The bar length shows the measured range; the label carries the exact figure: Honesty boundary These are benchmark medians, not this repo. NEVER print a per-repo savings number ("you saved X lines/tokens here"): the unbuilt version was never written, so there is no real baseline to subtract from in a live repo. The only real per-repo figures come from /ponytail-debt (a counted ledger), and this card points there instead of inventing one. Boundaries One-shot display. Edits nothing, changes no mode. "stop ponytail" or "normal mode": revert.
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills dietrichgebert/ponytail-gain