diff --git a/README.md b/README.md
index f91fe20..7ddcbbb 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # build2me
 
-**Turn building software into doing mathematics — so a swarm of agents can work
-in parallel without coordinating, and without a human reviewing code.**
+**Map the solution space before you build the software — so a swarm of agents can
+work in parallel without coordinating, and without a human reviewing code.**
 
 Work is split into immutable contracts, each carrying the command that decides
 whether it is satisfied. Agents pick contracts off a ranked frontier without
diff --git a/README.zh-CN.md b/README.zh-CN.md
index c9d399f..d7c5e3b 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -1,6 +1,6 @@
 # build2me（中文）
 
-**一句话：把「写软件」改造成「做数学证明」，好让几十个 agent 同时开工——不用互相协调，也不用人来审代码。**
+**一句话：在 build 软件之前，先绘制解空间的地图——好让几十个 agent 同时开工，不用互相协调，也不用人来审代码。**
 
 [协议全文](PROTOCOL.md)（英文） · [桩语义](STUBS.md) · [DAG 图](docs/DAG.md) · [Race 001](races/001-deprecation-cascade.md) · [English](README.md)