diff --git a/src/tools/skill/types.ts b/src/tools/skill/types.ts
index c5ae02540..0ac4e5bc8 100644
--- a/src/tools/skill/types.ts
+++ b/src/tools/skill/types.ts
@@ -45,4 +45,6 @@ export interface SkillLoadOptions {
     get(name: string): { name: string; description: string; location: string; content: string } | undefined | Promise<{ name: string; description: string; location: string; content: string } | undefined>
     dirs(): string[] | Promise<string[]>
   }
+  /** Project directory for skill discovery and base directory resolution. Should be ctx.directory from PluginContext. */
+  directory?: string
 }