docs: add Trendshift daily and weekly badges to READMEs

Adds the daily and weekly Trendshift badges to the header badge area of
the English, Spanish, and Korean READMEs. Alt text decoded from %2F to a
plain slash for screen readers.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.es.md

@@ -19,6 +19,11 @@
   <img src="https://img.shields.io/badge/licencia-MIT-111111?style=flat-square" alt="MIT license">
 </p>
 
+<p align="center">
+  <a href="https://trendshift.io/repositories/50668" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/50668/daily" alt="DietrichGebert/ponytail | Trendshift" width="250" height="55"/></a>
+  <a href="https://trendshift.io/repositories/50668" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/50668/weekly" alt="DietrichGebert/ponytail | Trendshift" width="250" height="55"/></a>
+</p>
+
 <p align="center">
   <strong>~54% menos código (hasta 94%) &middot; ~20% más barato &middot; ~27% más rápido &middot; 100% seguro</strong><br>
   <sub>Medido en sesiones reales de Claude Code editando un repo open-source real (FastAPI + React), contra el mismo agente sin skill. ~54% es el promedio de 12 tareas de feature (Haiku 4.5, n=4); llega al 94% cuando un agente sobre-construye (un selector de fechas) y es casi cero cuando el código ya es mínimo. ponytail mantiene cada guarda de seguridad, mientras que un prompt pelado de "escribe one-liners" se salta una. (El benchmark anterior de un solo disparo reportaba 80-94% como cifra plana; contra un baseline agéntico justo, ese es el techo por tarea, no el promedio.) <a href="benchmarks/results/2026-06-18-agentic.md">Reporte completo</a> &middot; <a href="benchmarks/">reprodúcelo</a>.</sub>

README.ko.md

@@ -19,6 +19,11 @@
   <img src="https://img.shields.io/badge/license-MIT-111111?style=flat-square" alt="MIT license">
 </p>
 
+<p align="center">
+  <a href="https://trendshift.io/repositories/50668" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/50668/daily" alt="DietrichGebert/ponytail | Trendshift" width="250" height="55"/></a>
+  <a href="https://trendshift.io/repositories/50668" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/50668/weekly" alt="DietrichGebert/ponytail | Trendshift" width="250" height="55"/></a>
+</p>
+
 <p align="center">
   <strong>코드 약 54% 감소(최대 94%) &middot; 약 20% 저렴 &middot; 약 27% 빠름 &middot; 100% 안전</strong><br>
   <sub>실제 오픈소스 저장소(FastAPI + React)를 고치는 실제 Claude Code 세션에서, 스킬을 끈 같은 에이전트와 견줘 측정했다. 약 54%는 기능 작업 12건의 평균이다(Haiku 4.5, n=4). 에이전트가 과하게 짤 여지가 있는 곳(날짜 선택기)에선 94%까지 오르고, 코드가 이미 최소한인 곳에선 0에 가깝다. ponytail은 안전 가드를 하나도 빼놓지 않지만, 그냥 "한 줄로 써"라고만 시킨 프롬프트는 그중 하나를 놓친다. (예전 단발성 벤치마크는 80-94%를 단일 수치로 내세웠는데, 공정한 에이전트 기준선에 견주면 그건 평균이 아니라 작업별 상한이다.) <a href="benchmarks/results/2026-06-18-agentic.md">전체 보고서</a> &middot; <a href="benchmarks/">직접 재현하기</a>.</sub>

README.md

@@ -19,6 +19,11 @@
   <img src="https://img.shields.io/badge/license-MIT-111111?style=flat-square" alt="MIT license">
 </p>
 
+<p align="center">
+  <a href="https://trendshift.io/repositories/50668" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/50668/daily" alt="DietrichGebert/ponytail | Trendshift" width="250" height="55"/></a>
+  <a href="https://trendshift.io/repositories/50668" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/50668/weekly" alt="DietrichGebert/ponytail | Trendshift" width="250" height="55"/></a>
+</p>
+
 <p align="center">
   <strong>~54% less code (up to 94%) &middot; ~20% cheaper &middot; ~27% faster &middot; 100% safe</strong><br>
   <sub>Measured on real Claude Code sessions editing a real open-source repo (FastAPI + React), against the same agent with no skill. ~54% is the mean across 12 feature tasks (Haiku 4.5, n=4); it reaches 94% where an agent over-builds (a date picker) and is near zero where the code is already minimal. ponytail keeps every safety guard while a bare "write one-liners" prompt drops one. (The earlier single-shot benchmark reported 80-94% as a flat figure; against a fair agentic baseline that is the per-task ceiling, not the average.) <a href="benchmarks/results/2026-06-18-agentic.md">Full writeup</a> &middot; <a href="benchmarks/">reproduce it</a>.</sub>