Merge pull request #1873 from deepseek-harness/fix/code-mode-executor-collapse

fix(tools): collapse code-mode executor to run_code for model-direct calls

packages/core/agent-tool-mode/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/core/agent-tool-mode/README.md
-README.md: 0ef7f32c0890e5ef1071368571bd78b400b656e2
-README.zh.md: 974fc4ed574e44244f8d97682e2451440c8267ce
+README.md: f5f2df21285411dbb3b8c5cac18cc3ab0dc8a22b
+README.zh.md: 84c2ff009540c2637e01875b1171c39afa6ae2f3

packages/core/agent-tool-mode/README.md

@@ -20,7 +20,7 @@ One agent declares one presentation. A second declaration in the same compositio
 
 ## Model Experience
 
-Indirectly, through the projection it selects in `dsh-tools`: `code` presents `run_code` plus a generated SDK section, `native` presents every tool schema.
+Indirectly, through the projection it selects in `dsh-tools`: `code` presents `run_code` plus a generated SDK section and the rule that only `run_code` may be called directly, `native` presents every tool schema. The selection also decides what may EXECUTE: under `code` the registry resolves a model-direct call naming any other tool to `UNKNOWN_TOOL`, so this row is what keeps the announced surface and the callable surface the same for every agent it covers ([executor-collapse note](../../../.agents/notes/implemented/bug-fix/2026-08-07-code-mode-executor-collapse.md)).
 
 #### KV Cache effect
 

packages/core/agent-tool-mode/README.zh.md

@@ -20,7 +20,7 @@ preset 能拥有的是这份注册表的**呈现方式**。`ctx.tools.presentAs(
 
 ## Model Experience
 
-Indirectly, through the projection it selects in `dsh-tools`: `code` presents `run_code` plus a generated SDK section, `native` presents every tool schema.
+间接生效，取决于它在 `dsh-tools` 中选择的投影：`code` 呈现 `run_code`、一份生成的 SDK 段，以及「只有 `run_code` 可被直接调用」这条规则，`native` 呈现每个工具的 schema。该选择同时决定了**什么可以执行**：在 `code` 下，注册表会把模型直呼其他任何工具名解析为 `UNKNOWN_TOOL`，因此这一行正是让「通告面」与「可调用面」对每个被它覆盖的 agent 保持一致的东西（[执行器塌缩 note](../../../.agents/notes/implemented/bug-fix/2026-08-07-code-mode-executor-collapse.md)）。
 
 #### KV Cache effect