diff --git a/README.en.md b/README.en.md
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@@ -16,9 +16,11 @@ One-shot LLM eval cases by NAGI STUDIO: same prompt, different model x harness x
 
 ## Models vs harnesses
 
+> **Model + Harness = Agent** — a model is just weights; wrap it in a runtime and it becomes an agent that can actually do the work. That agent is the unit this bench evaluates.
+
 - **Model**: the weights and inference engine itself — GPT-5.5, Gemini 3.1 Pro, Claude Fable 5.
 - **Harness**: the product/scaffolding wrapping the model — Codex CLI, Cursor, AntiGravity, the Claude web app. It controls tool calls, system prompts, context management and continuation strategy, and often shapes the outcome as much as the model does.
-- The unit of evaluation here is therefore the **combination**: the same model under a different harness or effort level is a separate entry (GPT-5.5 Pro and GPT-5.5 running in Codex CLI at xhigh are two records of the same model family). Effort defaults to max; new effort variants of an existing combination can be added later.
+- The unit of evaluation here is therefore an **Agent**: the same model under a different harness is a different agent and a separate entry (GPT-5.5 Pro and GPT-5.5 running in Codex CLI at xhigh are two agents from the same model family). Effort is a parameter of that agent, defaulting to max.
 
 ## Registry
 
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -16,9 +16,11 @@ NAGI STUDIO 的 LLM 测评案例集：同一段提示词，不同「模型 × Ha
 
 ## 模型与 Harness 的关系
 
+> **Model + Harness = Agent** —— 模型只是权重，套上运行环境才成为一个能干活的智能体（Agent）。本仓库的测评单位就是一个 Agent。
+
 - **模型（Model）**：权重与推理引擎本身，如 GPT-5.5、Gemini 3.1 Pro、Claude Fable 5。
 - **Harness（运行环境）**：包裹模型的产品/脚手架，如 Codex CLI、Cursor、AntiGravity、Claude 网页版——它决定工具调用、系统提示词、上下文管理与续写策略，对最终产出的影响往往不亚于模型本身。
-- 因此本仓库的测评单位是**组合**：同一个模型在不同 Harness 或不同思考配额下，记为不同条目（例如 GPT-5.5 Pro 与跑在 Codex CLI 里的 GPT-5.5（xhigh）是同一模型家族的两条记录）。思考配额默认拉满（Max），未来同一组合可以追加新配额版本。
+- 因此本仓库的测评单位是一个 **Agent**：同一个模型换一个 Harness，就是另一个 Agent，记为不同条目（例如 GPT-5.5 Pro 与跑在 Codex CLI 里的 GPT-5.5（xhigh）是同一模型家族的两个 Agent）。思考配额（effort）是这个 Agent 的一个参数，默认拉满（Max）。
 
 ## 已测组合 / Registry