grep fails when target directory is outside of the initial workspace (ctx.cwd)

[fooofei]

Description

When starting pi in a specific directory, the fff tool fails to search for files in a different directory provided in the prompt. This is because the search indexer is currently limited to the initial ctx.cwd.

Steps to Reproduce

1. Start pi in directory d:\a\b\c:

   d:\a\b\c> pi
   
   
   1. Enter the following prompt:
   
   "please search content hello in d:\d directory"
   
   

Expected Behavior

The tool should be able to index and search files within the specified d:\d directory.

Actual Behavior

The search returns no results.
In src/index.ts, the session_start function initializes ctx.cwd to d:\a\b\c. Because fff only indexes the current working directory, it cannot access or find files located in d:\d.

Suggested Solutions

Solution 1: Broaden Indexing Scope

In session_start, consider indexing from the drive root (e.g., d:) instead of the sub-directory to allow broader file access.

Solution 2: Implement Dynamic Re-indexing

Introduce a tool like fff_chindex_directory to allow the system to dynamically change or add a directory to the index based on the user's requested path.

attachment

diff --git a/package.json b/package.json
index e5ee18d..24ed4ae 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "url": "git+https://github.com/ShpetimA/pi-fff.git"
   },
   "dependencies": {
-    "@ff-labs/fff-node": "^0.5.2",
+    "@ff-labs/fff-node": "^0.6.0",
     "@sinclair/typebox": "^0.34.41",
     "better-result": "^2.8.2"
   },
diff --git a/src/fff-runtime.ts b/src/fff-runtime.ts
index 567bf6a..b1665d9 100644
--- a/src/fff-runtime.ts
+++ b/src/fff-runtime.ts
@@ -304,6 +304,16 @@ export class FffRuntime {
 		return toVoidResult(safeFinderCall("scanFiles", () => finderResult.value.scanFiles()));
 	}
 
+  async chindex(path: string) {
+    const finderResult = await this.ensure();
+		if (finderResult.isErr()) return propagateError(finderResult);
+		return toVoidResult(safeFinderCall("reindex", () => {
+      const r = finderResult.value.reindex(path);
+      this.basePath = isAbsolute(path) ? path : resolve(this.basePath, path);
+      return r;
+    }));
+  }
+
 	async getStatus(): Promise<AppResult<{ state: string; indexedFiles?: number; error?: string }, RuntimeInitializationError>> {
 		const finderResult = await this.ensure();
 		if (finderResult.isErr()) return propagateError(finderResult);
diff --git a/src/register-tools.ts b/src/register-tools.ts
index df446aa..dd4c5c5 100644
--- a/src/register-tools.ts
+++ b/src/register-tools.ts
@@ -98,6 +98,7 @@ export function registerTools(pi: ExtensionAPI, deps: ToolRegistrationDeps): voi
 			"Use path/glob/constraints to narrow scope before trying another grep.",
 			"Use outputMode=files_with_matches when content output is too noisy.",
 			"After one or two good greps, read the best matching file.",
+      "Use fff_chdir tool when given path scope has no matches to change fff index directory to the right one.",
 		],
 		parameters: grepSchema,
 		async execute(toolCallId, params, signal, onUpdate, ctx) {
@@ -205,4 +206,25 @@ export function registerTools(pi: ExtensionAPI, deps: ToolRegistrationDeps): voi
 			});
 		},
 	});
+
+
+  pi.registerTool({
+		name: "fff_chdir",
+		label: "change fff index directory",
+		description: "change fff index directory",
+		promptSnippet: "Explore which files exist for a topic before reading one.",
+		promptGuidelines: ["Use this tool when grep/find_files No matches found."],
+		parameters: Type.Object({
+			path: Type.String({ description: "new index directory" }),
+		}),
+		async execute(_toolCallId, params) {
+   		const guarded = getAgentRuntime(buildFindFilesDetails(undefined, "agentTools"), buildFindFilesDetails());
+			if (guarded.kind !== "ready") return guarded.result;
+			const result = await guarded.runtime.chindex(params.path);
+			return result.match({
+				err: (error) => textResult(`Failed to change fff index directory to ${params.path}: ${error.message}` , null),
+				ok: () => textResult(`FFF index directory changed to ${params.path}` , null),
+			});
+		},
+	});
 }