feat(mcp): Add pagination and filtering to list_repos tool

packages/mcp/CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Added pagination and filtering to `list_repos` tool to handle large repository lists efficiently and prevent oversized responses that waste token context. [#614](https://github.com/sourcebot-dev/sourcebot/pull/614)
+
 ## [1.0.8] - 2025-11-10
 
 ### Fixed

packages/mcp/README.md

@@ -182,7 +182,18 @@ Fetches code that matches the provided regex pattern in `query`.
 
 ### list_repos
 
-Lists all repositories indexed by Sourcebot.
+Lists repositories indexed by Sourcebot with optional filtering and pagination.
+
+<details>
+<summary>Parameters</summary>
+
+| Name         | Required | Description                                                         |
+|:-------------|:---------|:--------------------------------------------------------------------|
+| `query`      | no       | Filter repositories by name (case-insensitive).                     |
+| `pageNumber` | no       | Page number (1-indexed, default: 1).                                |
+| `limit`      | no       | Number of repositories per page (default: 50).                      |
+
+</details>
 
 ### get_file_source
 

packages/mcp/src/index.ts

@@ -7,6 +7,7 @@ import escapeStringRegexp from 'escape-string-regexp';
 import { z } from 'zod';
 import { listRepos, search, getFileSource } from './client.js';
 import { env, numberSchema } from './env.js';
+import { listReposRequestSchema } from './schemas.js';
 import { TextContent } from './types.js';
 import { isServiceError } from './utils.js';
 
@@ -165,8 +166,13 @@ server.tool(
 
 server.tool(
     "list_repos",
-    "Lists all repositories in the organization. If you receive an error that indicates that you're not authenticated, please inform the user to set the SOURCEBOT_API_KEY environment variable.",
-    async () => {
+    "Lists repositories in the organization with optional filtering and pagination. If you receive an error that indicates that you're not authenticated, please inform the user to set the SOURCEBOT_API_KEY environment variable.",
+    listReposRequestSchema.shape,
+    async ({ query, pageNumber = 1, limit = 50 }: {
+        query?: string;
+        pageNumber?: number;
+        limit?: number;
+    }) => {
         const response = await listRepos();
         if (isServiceError(response)) {
             return {
@@ -177,13 +183,45 @@ server.tool(
             };
         }
 
-        const content: TextContent[] = response.map(repo => {
+        // Apply query filter if provided
+        let filtered = response;
+        if (query) {
+            const lowerQuery = query.toLowerCase();
+            filtered = response.filter(repo =>
+                repo.repoName.toLowerCase().includes(lowerQuery) ||
+                repo.repoDisplayName?.toLowerCase().includes(lowerQuery)
+            );
+        }
+
+        // Sort alphabetically for consistent pagination
+        filtered.sort((a, b) => a.repoName.localeCompare(b.repoName));
+
+        // Apply pagination
+        const startIndex = (pageNumber - 1) * limit;
+        const endIndex = startIndex + limit;
+        const paginated = filtered.slice(startIndex, endIndex);
+
+        // Format output
+        const content: TextContent[] = paginated.map(repo => {
             return {
                 type: "text",
                 text: `id: ${repo.repoName}\nurl: ${repo.webUrl}`,
             }
         });
 
+        // Add pagination info
+        if (content.length === 0 && filtered.length > 0) {
+            content.push({
+                type: "text",
+                text: `No results on page ${pageNumber}. Total matching repositories: ${filtered.length}`,
+            });
+        } else if (filtered.length > endIndex) {
+            content.push({
+                type: "text",
+                text: `Showing ${paginated.length} repositories (page ${pageNumber}). Total matching: ${filtered.length}. Use pageNumber ${pageNumber + 1} to see more.`,
+            });
+        }
+
         return {
             content,
         };

packages/mcp/src/schemas.ts

@@ -156,6 +156,25 @@ export const repositoryQuerySchema = z.object({
 
 export const listRepositoriesResponseSchema = repositoryQuerySchema.array();
 
+export const listReposRequestSchema = z.object({
+    query: z
+        .string()
+        .describe("Filter repositories by name or displayName (case-insensitive)")
+        .optional(),
+    pageNumber: z
+        .number()
+        .int()
+        .positive()
+        .describe("Page number (1-indexed, default: 1)")
+        .default(1),
+    limit: z
+        .number()
+        .int()
+        .positive()
+        .describe("Number of repositories per page (default: 50)")
+        .default(50),
+});
+
 export const fileSourceRequestSchema = z.object({
     fileName: z.string(),
     repository: z.string(),