revanced-ponytail-gain

name	revanced-ponytail-gain
description	Show measured impact from the upstream agentic benchmark only: less code, less cost, more speed, with limits. One-shot display. Not a per-repo savings number. Trigger: /revanced-ponytail-gain, "ponytail gain", "what does ponytail save", "show impact scoreboard".
license	MIT
metadata	{"author":"chloevpin","version":"1.0.0","upstream":"DietrichGebert/ponytail","repository":"https://github.com/ChloeVPin/revanced-ponytail"}

revanced-ponytail-gain

Display this card when invoked. One-shot. Do not change mode. Do not invent per-repo savings.

Scoreboard (agentic, not single-shot)

Source: DietrichGebert/ponytail agentic benchmark, 2026-06-18.
Setup: Claude Code sessions, Haiku 4.5, real FastAPI + React template, n=4, LOC from git diff added lines.

12 feature tasks vs no-skill baseline (means):

Arm	LOC	tokens	cost	time
ponytail	-54%	-22%	-20%	-27%
yagni-oneliner prompt	-33%	-14%	-21%	-30%
caveman (terse prose)	-20%	+7%	+3%	+2%

Reading:

• Large cuts appear where over-build traps exist (for example custom date/color pickers vs native inputs).
• Near zero where code is already minimal.
• Peak per-task reductions can reach ~90%+ on over-build traps. That is not the mean.

Safety suite (6 surgical tasks, deterministic checks):

Arm	Safe rate on suite
ponytail	20/20
baseline / caveman	20/20
yagni-oneliner	19/20

This is a floor, not a security proof. One model. Small suite.

Honesty boundary

• These are published agentic medians, not this repository.
• Never print "you saved X lines here." The unbuilt version was never written.
• Do not cite the old single-shot 80-94% figure as the headline. That baseline was partly conversational padding.
• For local deferred work, point to revanced-ponytail-debt.
• For local cut candidates, point to revanced-ponytail-audit.

ASCII card (optional render)

  revanced-ponytail gain     agentic · 12 feature tasks · Haiku 4.5 · n=4

  LOC vs baseline            ponytail mean  -54%   (peak where over-build exists)
  tokens / cost / time       -22% / -20% / -27%
  safety suite               20/20 known guards kept (floor, not proof)

  This repo:  revanced-ponytail-debt | revanced-ponytail-audit

Boundaries

One-shot. Edits nothing. Changes no mode.