Appendix: The Code Behind It

File	Role
`src/Tool.ts`	Tool interface definition, `buildTool()` factory function, `TOOL_DEFAULTS` defaults
`src/tools/BashTool/BashTool.tsx`	Bash tool implementation; progress threshold and command classification logic
`src/tools/BashTool/bashPermissions.ts`	Bash-specific permission checking; AST parsing entry point
`src/tools/REPLTool/constants.ts`	REPL mode enable logic; `REPL_ONLY_TOOLS` list
`src/utils/bash/ast.ts`	Bash command AST parser; security-semantic checking
`src/utils/permissions/bashClassifier.ts`	Bash command AI classifier interface