feat: add deterministic naming for Qdrant collections

- Add support for custom collection names via .roo/codebase-index.json
- Use git repository URL for deterministic collection naming across worktrees
- Fall back to workspace path hash when no git repo is available
- Normalize git URLs for consistent hashing
- Add comprehensive tests for new naming strategies

Fixes #7940

src/services/code-index/vector-store/__tests__/qdrant-client.spec.ts

@@ -1,5 +1,6 @@
 import { QdrantClient } from "@qdrant/js-client-rest"
 import { createHash } from "crypto"
+import * as fs from "fs"
 
 import { QdrantVectorStore } from "../qdrant-client"
 import { getWorkspacePath } from "../../../../utils/path"
@@ -8,6 +9,7 @@ import { DEFAULT_MAX_SEARCH_RESULTS, DEFAULT_SEARCH_MIN_SCORE } from "../../cons
 // Mocks
 vitest.mock("@qdrant/js-client-rest")
 vitest.mock("crypto")
+vitest.mock("fs")
 vitest.mock("../../../../utils/path")
 vitest.mock("../../../../i18n", () => ({
 	t: (key: string, params?: any) => {
@@ -68,6 +70,10 @@ describe("QdrantVectorStore", () => {
 		// Mock getWorkspacePath
 		;(getWorkspacePath as any).mockReturnValue(mockWorkspacePath)
 
+		// Mock fs functions - default to no git repo and no config file
+		;(fs.existsSync as any).mockReturnValue(false)
+		;(fs.readFileSync as any).mockReturnValue("")
+
 		vectorStore = new QdrantVectorStore(mockWorkspacePath, mockQdrantUrl, mockVectorSize, mockApiKey)
 	})
 
@@ -82,6 +88,7 @@ describe("QdrantVectorStore", () => {
 				"User-Agent": "Roo-Code",
 			},
 		})
+		// When no git repo or custom config, should fall back to workspace-based hash
 		expect(createHash).toHaveBeenCalledWith("sha256")
 		expect(mockCreateHashInstance.update).toHaveBeenCalledWith(mockWorkspacePath)
 		expect(mockCreateHashInstance.digest).toHaveBeenCalledWith("hex")
@@ -89,6 +96,93 @@ describe("QdrantVectorStore", () => {
 		expect((vectorStore as any).collectionName).toBe(expectedCollectionName)
 		expect((vectorStore as any).vectorSize).toBe(mockVectorSize)
 	})
+
+	it("should use custom collection name from .roo/codebase-index.json if available", () => {
+		// Mock the config file to exist and contain a custom collection name
+		;(fs.existsSync as any).mockImplementation((path: string) => {
+			return path.includes(".roo/codebase-index.json")
+		})
+		;(fs.readFileSync as any).mockReturnValue(
+			JSON.stringify({
+				collectionName: "my-custom-collection",
+			}),
+		)
+
+		const customVectorStore = new QdrantVectorStore(mockWorkspacePath, mockQdrantUrl, mockVectorSize, mockApiKey)
+
+		// Should use the sanitized custom collection name
+		expect((customVectorStore as any).collectionName).toBe("my-custom-collection")
+	})
+
+	it("should use git repository URL for deterministic naming when available", () => {
+		// Mock git config to exist
+		;(fs.existsSync as any).mockImplementation((path: string) => {
+			return path.includes(".git")
+		})
+		;(fs.readFileSync as any).mockImplementation((path: string) => {
+			if (path.includes(".git/config")) {
+				return `[remote "origin"]
+	url = git@github.com:user/repo.git`
+			}
+			return ""
+		})
+
+		// Mock createHash for the git URL
+		const gitUrlHash = "gitrepo1234567890abcdef"
+		mockCreateHashInstance.digest.mockReturnValueOnce(gitUrlHash)
+
+		const gitVectorStore = new QdrantVectorStore(mockWorkspacePath, mockQdrantUrl, mockVectorSize, mockApiKey)
+
+		// Should use repo- prefix with git URL hash
+		expect((gitVectorStore as any).collectionName).toBe(`repo-${gitUrlHash.substring(0, 16)}`)
+
+		// Verify it hashed the normalized git URL
+		expect(mockCreateHashInstance.update).toHaveBeenCalledWith("https://github.com/user/repo")
+	})
+
+	it("should normalize different git URL formats consistently", () => {
+		const testCases = [
+			{ input: "git@github.com:user/repo.git", expected: "https://github.com/user/repo" },
+			{ input: "https://github.com/user/repo.git", expected: "https://github.com/user/repo" },
+			{ input: "ssh://git@github.com/user/repo.git", expected: "https://github.com/user/repo" },
+			{ input: "https://user@github.com/user/repo.git", expected: "https://github.com/user/repo" },
+		]
+
+		testCases.forEach(({ input, expected }) => {
+			vitest.clearAllMocks()
+			;(fs.existsSync as any).mockImplementation((path: string) => path.includes(".git"))
+			;(fs.readFileSync as any).mockImplementation((path: string) => {
+				if (path.includes(".git/config")) {
+					return `[remote "origin"]\n\turl = ${input}`
+				}
+				return ""
+			})
+
+			const gitUrlHash = "normalized1234567890abcdef"
+			mockCreateHashInstance.digest.mockReturnValueOnce(gitUrlHash)
+
+			const store = new QdrantVectorStore(mockWorkspacePath, mockQdrantUrl, mockVectorSize, mockApiKey)
+
+			// Verify it hashed the normalized URL
+			expect(mockCreateHashInstance.update).toHaveBeenCalledWith(expected)
+		})
+	})
+
+	it("should sanitize custom collection names to be Qdrant-compatible", () => {
+		;(fs.existsSync as any).mockImplementation((path: string) => {
+			return path.includes(".roo/codebase-index.json")
+		})
+		;(fs.readFileSync as any).mockReturnValue(
+			JSON.stringify({
+				collectionName: "My Custom Collection!@#$%",
+			}),
+		)
+
+		const customVectorStore = new QdrantVectorStore(mockWorkspacePath, mockQdrantUrl, mockVectorSize, mockApiKey)
+
+		// Should sanitize the collection name
+		expect((customVectorStore as any).collectionName).toBe("my-custom-collection")
+	})
 	it("should handle constructor with default URL when none provided", () => {
 		const vectorStoreWithDefaults = new QdrantVectorStore(mockWorkspacePath, undefined as any, mockVectorSize)
 

src/services/code-index/vector-store/qdrant-client.ts

@@ -1,11 +1,13 @@
 import { QdrantClient, Schemas } from "@qdrant/js-client-rest"
 import { createHash } from "crypto"
 import * as path from "path"
+import * as fs from "fs"
 import { getWorkspacePath } from "../../../utils/path"
 import { IVectorStore } from "../interfaces/vector-store"
 import { Payload, VectorStoreSearchResult } from "../interfaces"
 import { DEFAULT_MAX_SEARCH_RESULTS, DEFAULT_SEARCH_MIN_SCORE } from "../constants"
 import { t } from "../../../i18n"
+import { getGitRepositoryInfo } from "../../../utils/git"
 
 /**
  * Qdrant implementation of the vector store interface
@@ -77,10 +79,135 @@ export class QdrantVectorStore implements IVectorStore {
 			})
 		}
 
-		// Generate collection name from workspace path
-		const hash = createHash("sha256").update(workspacePath).digest("hex")
+		// Generate deterministic collection name
 		this.vectorSize = vectorSize
-		this.collectionName = `ws-${hash.substring(0, 16)}`
+		this.collectionName = this.generateCollectionName(workspacePath)
+	}
+
+	/**
+	 * Generates a deterministic collection name based on repository or workspace
+	 * @param workspacePath Path to the workspace
+	 * @returns Collection name
+	 */
+	private generateCollectionName(workspacePath: string): string {
+		// First, check for a custom collection name in .roo/codebase-index.json
+		const customName = this.loadCustomCollectionName(workspacePath)
+		if (customName) {
+			// Sanitize the custom name to ensure it's valid for Qdrant
+			return this.sanitizeCollectionName(customName)
+		}
+
+		// Try to get git repository information for deterministic naming
+		const gitInfo = this.getGitInfoSync(workspacePath)
+		if (gitInfo?.repositoryUrl) {
+			// Use repository URL to generate a deterministic name
+			// This ensures the same collection name across worktrees and developers
+			const hash = createHash("sha256").update(gitInfo.repositoryUrl).digest("hex")
+			return `repo-${hash.substring(0, 16)}`
+		}
+
+		// Fallback to workspace path hash (original behavior)
+		const hash = createHash("sha256").update(workspacePath).digest("hex")
+		return `ws-${hash.substring(0, 16)}`
+	}
+
+	/**
+	 * Loads custom collection name from .roo/codebase-index.json if it exists
+	 * @param workspacePath Path to the workspace
+	 * @returns Custom collection name or undefined
+	 */
+	private loadCustomCollectionName(workspacePath: string): string | undefined {
+		try {
+			const configPath = path.join(workspacePath, ".roo", "codebase-index.json")
+			if (fs.existsSync(configPath)) {
+				const config = JSON.parse(fs.readFileSync(configPath, "utf8"))
+				if (config.collectionName && typeof config.collectionName === "string") {
+					return config.collectionName
+				}
+			}
+		} catch (error) {
+			// Ignore errors reading config file
+			console.warn(
+				`[QdrantVectorStore] Could not read custom collection name from .roo/codebase-index.json:`,
+				error,
+			)
+		}
+		return undefined
+	}
+
+	/**
+	 * Synchronously gets git repository information
+	 * @param workspacePath Path to the workspace
+	 * @returns Git repository info or undefined
+	 */
+	private getGitInfoSync(workspacePath: string): { repositoryUrl?: string } | undefined {
+		try {
+			const gitDir = path.join(workspacePath, ".git")
+
+			// Check if .git directory exists
+			if (!fs.existsSync(gitDir)) {
+				return undefined
+			}
+
+			// Try to read git config file
+			const configPath = path.join(gitDir, "config")
+			if (fs.existsSync(configPath)) {
+				const configContent = fs.readFileSync(configPath, "utf8")
+
+				// Extract remote URL
+				const urlMatch = configContent.match(/url\s*=\s*(.+?)(?:\r?\n|$)/m)
+				if (urlMatch && urlMatch[1]) {
+					const url = urlMatch[1].trim()
+					// Normalize the URL to ensure consistency
+					const normalizedUrl = this.normalizeGitUrl(url)
+					return { repositoryUrl: normalizedUrl }
+				}
+			}
+		} catch (error) {
+			// Ignore errors and fall back to workspace-based naming
+			console.warn(`[QdrantVectorStore] Could not read git repository info:`, error)
+		}
+		return undefined
+	}
+
+	/**
+	 * Normalizes a git URL for consistent hashing
+	 * @param url Git URL to normalize
+	 * @returns Normalized URL
+	 */
+	private normalizeGitUrl(url: string): string {
+		// Remove credentials
+		let normalized = url.replace(/^https?:\/\/[^@]+@/, "https://")
+
+		// Convert SSH to HTTPS format for consistency
+		if (normalized.startsWith("git@")) {
+			normalized = normalized.replace(/^git@([^:]+):/, "https://$1/")
+		} else if (normalized.startsWith("ssh://")) {
+			normalized = normalized.replace(/^ssh:\/\/(?:git@)?([^\/]+)\//, "https://$1/")
+		}
+
+		// Remove .git suffix
+		normalized = normalized.replace(/\.git$/, "")
+
+		// Convert to lowercase for consistency
+		normalized = normalized.toLowerCase()
+
+		return normalized
+	}
+
+	/**
+	 * Sanitizes a collection name to ensure it's valid for Qdrant
+	 * @param name Collection name to sanitize
+	 * @returns Sanitized collection name
+	 */
+	private sanitizeCollectionName(name: string): string {
+		// Qdrant collection names must be alphanumeric with underscores or hyphens
+		// Max length is typically 255 characters
+		return name
+			.toLowerCase()
+			.replace(/[^a-z0-9_-]/g, "-")
+			.replace(/^-+|-+$/g, "") // Remove leading/trailing hyphens
+			.substring(0, 255)
 	}
 
 	/**