diff --git a/CHANGELOG.md b/CHANGELOG.md
index d320974..69c66f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Documentation
+
+- **Release highlights in Chinese, English and Spanish** (`docs/release-highlights.*.md` / `README*.md`)
+  The highlights document now follows the same `<name>.<lang>.md` convention as the READMEs, with a language switcher in each file. Each README gained a Performance section carrying the latest release's headline figures and linking to the highlights and to the `### Validation` entries behind them.
+
 ## [0.4.0] — 2026-08-07
 
 ### New Features
diff --git a/README.es.md b/README.es.md
index 39ff4c3..4bf7d6f 100644
--- a/README.es.md
+++ b/README.es.md
@@ -76,6 +76,20 @@ Indeed 741 + LinkedIn 255 = 996 extraídos
   → Tasa de filtrado total: 94.6%  (solo 54 de 996 requieren revisión humana)
 ```
 
+## Rendimiento
+
+Última versión, 0.4.0:
+
+| Métrica | Antes | Después |
+| --- | --- | --- |
+| Búsqueda de extremo a extremo | 118,5 s | 45,6 s (-61,5 %) |
+| Primer resultado | 47,5 s | 12,8 s (-73,1 %) |
+| Llamadas al LLM por ejecución | 41 | 20 (-51,2 %) |
+
+Consulta las [novedades de cada versión](docs/release-highlights.es.md) y las
+entradas `### Validation` de [CHANGELOG.md](CHANGELOG.md) para saber cómo se
+midió cada cifra.
+
 ## Variables de Entorno
 
 ```env
diff --git a/README.md b/README.md
index 20c5b5a..b107d5e 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,20 @@ Indeed 741 + LinkedIn 255 = 996 scraped
   → Overall filter rate: 94.6%  (only 54 of 996 require human review)
 ```
 
+## Performance
+
+Latest release, 0.4.0:
+
+| Metric | Before | After |
+| --- | --- | --- |
+| Search end-to-end | 118.5 s | 45.6 s (-61.5%) |
+| First result | 47.5 s | 12.8 s (-73.1%) |
+| LLM calls per run | 41 | 20 (-51.2%) |
+
+See [release highlights](docs/release-highlights.md) for every release, and the
+`### Validation` entries in [CHANGELOG.md](CHANGELOG.md) for how each figure was
+measured.
+
 ## Environment Variables
 
 ```env
diff --git a/README.zh.md b/README.zh.md
index 1b56655..f93333f 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -76,6 +76,19 @@ Indeed 741 + LinkedIn 255 = 996 抓取
   → 最终过滤率   94.6%（996 条中仅 54 条需人工审阅）
 ```
 
+## 性能
+
+最新版本 0.4.0：
+
+| 指标 | 优化前 | 优化后 |
+| --- | --- | --- |
+| 搜索端到端 | 118.5 秒 | 45.6 秒（-61.5%） |
+| 首条结果 | 47.5 秒 | 12.8 秒（-73.1%） |
+| 每轮 LLM 调用 | 41 次 | 20 次（-51.2%） |
+
+各版本详见[版本亮点](docs/release-highlights.zh.md)，每个数字的测量方式见
+[CHANGELOG.md](CHANGELOG.md) 的 `### Validation` 条目。
+
 ## 环境变量
 
 ```env
diff --git a/docs/release-highlights.es.md b/docs/release-highlights.es.md
new file mode 100644
index 0000000..243315c
--- /dev/null
+++ b/docs/release-highlights.es.md
@@ -0,0 +1,30 @@
+# Novedades de cada versión
+
+> [中文](release-highlights.zh.md) · [English](release-highlights.md) · **Español**
+
+Resumen orientado al usuario de lo que mejoró cada versión. Cada cifra debe poder
+rastrearse hasta una entrada `### Validation` en [CHANGELOG.md](../CHANGELOG.md);
+este archivo nunca introduce una cifra propia.
+
+A partir de 0.5.0, cada versión se compara con la versión anterior.
+
+## 0.4.0
+
+Líneas base: `bench/serial-baseline` para las cifras de rendimiento y
+`bench/pre-merged-eval` → `bench/merged-eval` para las cifras de coste. Esta
+versión abarca diez pull requests, por lo que no se compara con `v0.3.0`.
+
+**La búsqueda es 2,6 veces más rápida**
+118,5 s → 45,6 s (-61,5 %)
+
+**El primer resultado llega 3,7 veces antes**
+47,5 s → 12,8 s (-73,1 %)
+
+**Rendimiento un 145 % mayor**
+14,7 → 36,0 ofertas por minuto
+
+**Llamadas al LLM reducidas a la mitad**
+41 → 20 por ejecución (-51,2 %)
+
+**Tokens de entrada por oferta un 47,5 % menos**
+5.251 → 2.759
diff --git a/docs/release-highlights.md b/docs/release-highlights.md
index 8f99785..3a55fd5 100644
--- a/docs/release-highlights.md
+++ b/docs/release-highlights.md
@@ -1,5 +1,7 @@
 # Release highlights
 
+> [中文](release-highlights.zh.md) · **English** · [Español](release-highlights.es.md)
+
 User-facing summary of what each release improved. Every figure here must trace
 back to a `### Validation` entry in [CHANGELOG.md](../CHANGELOG.md); this file
 never introduces a number of its own.
@@ -8,8 +10,8 @@ From 0.5.0 onward each release is compared against the previous release.
 
 ## 0.4.0
 
-Baselines: `09b20c0` serial architecture for the performance figures,
-`fb5b211` → `d4cfd11` single-variable runs for the cost figures. This release
+Baselines: `bench/serial-baseline` for the performance figures,
+`bench/pre-merged-eval` → `bench/merged-eval` for the cost figures. This release
 spans ten pull requests, so it is not compared against `v0.3.0`.
 
 **Search is 2.6x faster**
diff --git a/docs/release-highlights.zh.md b/docs/release-highlights.zh.md
new file mode 100644
index 0000000..f6fc2d7
--- /dev/null
+++ b/docs/release-highlights.zh.md
@@ -0,0 +1,29 @@
+# 版本亮点
+
+> **中文** · [English](release-highlights.md) · [Español](release-highlights.es.md)
+
+面向使用者的版本优化摘要。这里的每个数字都必须能在 [CHANGELOG.md](../CHANGELOG.md)
+的 `### Validation` 中找到出处；本文档不产生任何自己的数字。
+
+从 0.5.0 起，每个版本对比上一个发布版本。
+
+## 0.4.0
+
+基线：性能数字来自 `bench/serial-baseline`，成本数字来自
+`bench/pre-merged-eval` → `bench/merged-eval`。本版本跨越十个 PR，
+因此不与 `v0.3.0` 对比。
+
+**搜索快 2.6 倍**
+118.5 秒 → 45.6 秒（-61.5%）
+
+**首条结果快 3.7 倍**
+47.5 秒 → 12.8 秒（-73.1%）
+
+**吞吐提升 145%**
+每分钟 14.7 → 36.0 个职位
+
+**LLM 调用减半**
+每轮 41 → 20 次（-51.2%）
+
+**每职位输入 token 减少 47.5%**
+5,251 → 2,759