feat(core): instrument file system tools for JIT context discovery (#22082)

packages/core/src/tools/edit.ts

@@ -57,6 +57,7 @@ import levenshtein from 'fast-levenshtein';
 import { EDIT_DEFINITION } from './definitions/coreTools.js';
 import { resolveToolDeclaration } from './definitions/resolver.js';
 import { detectOmissionPlaceholders } from './omissionPlaceholderDetector.js';
+import { discoverJitContext, appendJitContext } from './jit-context.js';
 
 const ENABLE_FUZZY_MATCH_RECOVERY = true;
 const FUZZY_MATCH_THRESHOLD = 0.1; // Allow up to 10% weighted difference
@@ -937,8 +938,18 @@ ${snippet}`);
         );
       }
 
+      // Discover JIT subdirectory context for the edited file path
+      const jitContext = await discoverJitContext(
+        this.config,
+        this.resolvedPath,
+      );
+      let llmContent = llmSuccessMessageParts.join(' ');
+      if (jitContext) {
+        llmContent = appendJitContext(llmContent, jitContext);
+      }
+
       return {
-        llmContent: llmSuccessMessageParts.join(' '),
+        llmContent,
         returnDisplay: displayResult,
       };
     } catch (error) {