refactor: prune bash implementation surface

docs/config-catalog.md

@@ -149,7 +149,7 @@ export interface Config {
 }
 ```
 
-Source: [`packages/bash/bash-local/src/index.ts:29`](../packages/bash/bash-local/src/index.ts)
+Source: [`packages/bash/bash-local/src/index.ts:26`](../packages/bash/bash-local/src/index.ts)
 
 ## `@deepseek-ai/dsh-bash-sandbox`
 

docs/core-data-structures/bash.md

@@ -202,7 +202,6 @@ A long-running command started with `start()` is tracked as a `BashTask`. `BashT
 ```ts type-equiv
 interface BashTask {
   readonly id: BashTaskId
-  readonly command: string
   status: BashTaskStatus
   /** Exit code once finished (null = killed by signal / still running). */
   exitCode: number | null