fix(eve): scope forget, persist capture idempotency, and fail closed

Review findings: delete was not partitioned by scope.key, capture
replay after restart could double-write, and Mem0 errors were swallowed
as empty recall.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/integrations/eve.mdx

@@ -5,7 +5,7 @@ description: "Use Mem0 as a first-class memory provider for Vercel Eve agents."
 
 [Eve](https://eve.dev/docs/memory) is Vercel's agent framework. A memory provider sits in the agent loop: Eve recalls context before each turn, captures completed turns, and exposes provider tools. `@mem0/eve` is Mem0's implementation of that contract.
 
-This is not the Mem0 MCP connection. MCP gives the model tools it may or may not call. The memory provider runs automatically.
+This is not the Mem0 MCP connection. MCP gives the model tools it may or may not call. The memory provider runs automatically. The live MCP install is `eve add connection/mem0`.
 
 ## Install
 
@@ -31,19 +31,15 @@ export default defineMemory({
 });
 ```
 
-After Eve lists Mem0 in the official registry, the same slot is created by:
+`eve add memory/mem0` is not in Eve's catalog yet. After Mem0 is listed in the official registry, that command will create the same slot file.
-
-```bash
-eve add memory/mem0
-```
 
 ## How it works
 
-1. **Recall.** Before each turn, Mem0 searches memories for the locked Eve scope and returns them as attributed user-role messages.
+1. **Recall.** Before each turn and after compaction, Mem0 searches memories for the locked Eve scope and returns `{ id, content }` messages. Eve injects those as user-role messages attributed to the slot.
-2. **Capture.** After a successful turn, Mem0 adds the user and assistant messages and extracts durable facts.
+2. **Capture.** After a successful turn, Mem0 adds the user messages from that turn and, when present, the latest assistant reply. By default (`infer: true`) Mem0 extracts durable facts.
 3. **Tools.** The model can call `search`, `remember`, and `forget`. Eve qualifies them as `mem0__search`, `mem0__remember`, and `mem0__forget` when the slot file is `mem0.ts`.
 
-Eve owns namespace, scope, and when recall/capture run. Mem0 owns storage, ranking, and extraction. Every read and write is partitioned by `memory.scope.key`.
+Eve owns namespace, scope, and when recall/capture run. Mem0 owns storage, ranking, and extraction. Search, capture, remember, and forget are partitioned by `memory.scope.key`. Forget deletes by id only after confirming the memory belongs to that key.
 
 ## Options
 

docs/llms.txt

@@ -263,7 +263,7 @@ If the user is on a pre-current major (Python < 2, TS < 3, or a Platform call st
 - [Mastra](https://docs.mem0.ai/integrations/mastra) [Platform]: Use when the user is on Mastra (TypeScript).
 - [OpenClaw](https://docs.mem0.ai/integrations/openclaw) [Both]: Use when wiring Mem0 into Claude Code or editors via OpenClaw.
 - [Vercel AI SDK](https://docs.mem0.ai/integrations/vercel-ai-sdk) [Both]: Use when the user is on the Vercel AI SDK.
-- [Eve](https://docs.mem0.ai/integrations/eve) [Platform]: Use when adding Mem0 as a first-class Eve memory provider (`@mem0/eve`, `mem0Provider`, `eve add memory/mem0`). Not the Mem0 MCP connection.
+- [Eve](https://docs.mem0.ai/integrations/eve) [Platform]: Use when adding Mem0 as a first-class Eve memory provider (`@mem0/eve`, `mem0Provider`, hand-written `agent/memory/mem0.ts`). `eve add memory/mem0` is not available yet. Not the Mem0 MCP connection (`eve add connection/mem0`).
 - [Vercel](https://docs.mem0.ai/integrations/vercel) [Platform]: Use when deploying on Vercel and installing Mem0 from the Vercel Marketplace.
 - [Strands Agents](https://docs.mem0.ai/integrations/strands) [Both]: Use when the user is on AWS Strands and wants a native MemoryStore.
 

integrations/AGENTS.md

@@ -47,7 +47,7 @@ Run the type check after every TypeScript change: `pnpm run typecheck` or `tsc -
 
 ## What each one is
 
-- **`eve/`** is the Eve memory provider (`mem0Provider`). Eve calls recall before each turn and capture after each turn. This is not the Mem0 MCP connection.
+- **`eve/`** is the Eve memory provider (`mem0Provider`). Eve calls recall on `turn.started` and `compaction.completed`, capture on `turn.completed` when enabled, and exposes `search` / `remember` / `forget` tools. This is not the Mem0 MCP connection.
 - **`vercel-ai-sdk/`** wraps the Vercel AI SDK through a `createMem0` provider. Integrations for AI-SDK repos go through this wrapper, not raw `MemoryClient`.
 - **`claude-code-plugin/`** is the Claude Code plugin (v0.3.0, installs as `mem0@mem0-plugins`): local evidence capture via lifecycle hooks, background memory extraction to the Mem0 Platform, a local `search_memories` MCP tool, six `/mem0:*` skills, and the `mem0:sidekick` agent. Pure-stdlib Python — no dependencies to install. Its `core/` + `adapters/claude/` split marks engine vs. harness glue; future per-harness plugins start by copying `core/` and keeping the contract tests verbatim (see its `docs/CONTRACT.md`).
 - **`mem0-plugin/`** connects Cursor, Codex, Kimi, Antigravity, and OpenCode to the MCP server at `mcp.mem0.ai` and installs lifecycle hooks for automatic memory capture. Exposes 9 MCP tools: `add_memory`, `search_memories`, `get_memories`, `get_memory`, `update_memory`, `delete_memory`, `delete_all_memories`, `delete_entities`, `list_entities`. The Claude Code plugin moved to [`claude-code-plugin/`](claude-code-plugin/) in v0.3.0 (installs as `mem0@mem0-plugins`); do not run both at the same time.

integrations/eve/README.md

@@ -26,25 +26,27 @@ npm install @mem0/eve
 
 `eve` is a peer dependency. Get an API key from the [Mem0 dashboard](https://app.mem0.ai/dashboard/api-keys).
 
-Until Eve lists Mem0 in the official registry, add the slot file yourself as `agent/memory/mem0.ts`. After the registry PR lands, this becomes:
+Until Eve lists Mem0 in the official registry, add the slot file yourself as `agent/memory/mem0.ts`. `eve add memory/mem0` is not available yet. After the registry PR lands, that command will create the same file.
 
-```bash
+The live MCP path today is `eve add connection/mem0`. That is a different integration: tools the model may call, not automatic recall/capture.
-eve add memory/mem0
-```
 
 ## What it does
 
 | Eve hook | Mem0 behavior |
 |---|---|
 | `recall["turn.started"]` | Semantic search over memories for the locked scope |
-| `recall["compaction.completed"]` | Same search after Eve compacting history |
+| `recall["compaction.completed"]` | Same search after Eve compacting history (`turn` may be null) |
-| `capture["turn.completed"]` | Add the completed user/assistant turn |
+| `capture["turn.completed"]` | Add the completed user turn and, when present, the latest assistant reply |
 | `tools()` | `search`, `remember`, `forget` |
 
-Every read and write is partitioned by `memory.scope.key`. The model cannot choose another caller. Replay uses `operationId` as an idempotency key.
+Search, capture, remember, and forget are partitioned by `memory.scope.key`. Forget loads the memory first and deletes only when `userId` matches that key.
+
+Capture uses `operationId` as an idempotency key: an in-process gate plus a durable `metadata.operation_id` lookup so Eve replays after restart do not write twice.
 
 If the slot file is named `mem0.ts`, Eve qualifies tools as `mem0__search`, `mem0__remember`, and `mem0__forget`.
 
+A throwing `recall` fails the Eve turn. A throwing `capture` is logged by Eve and does not fail the turn. Tool `execute` errors become failed tool results the model can see.
+
 ## Options
 
 ```ts
@@ -63,15 +65,16 @@ mem0Provider({
 
 | Option | Default | Purpose |
 |---|---|---|
-| `apiKey` | required | String or async getter |
+| `apiKey` | required without `store` | String or async getter. Function keys are validated on first use. |
-| `host` | `https://api.mem0.ai` | Mem0 Platform host |
+| `host` | `https://api.mem0.ai` | Mem0 Platform host (`http:` or `https:` URL) |
-| `topK` | `5` | Memories recalled per turn |
+| `topK` | `5` | Result count for automatic recall and the `search` tool |
-| `threshold` | `0.1` | Minimum similarity |
+| `threshold` | `0.1` | Minimum similarity for automatic recall and the `search` tool |
-| `rerank` | `false` | Mem0 reranking |
+| `rerank` | `false` | Mem0 reranking for automatic recall and the `search` tool |
-| `infer` | `true` | Extract facts on capture |
+| `infer` | `true` | Extract facts on capture and on `remember` |
-| `autoSearch.enabled` | `true` | Recall before each turn |
+| `autoSearch.enabled` | `true` | Recall on `turn.started` and `compaction.completed` |
 | `capture.enabled` | `true` | Write after each successful turn |
 | `metadata` | `{}` | Extra metadata on captured turns |
+| `store` | unset | Test / advanced injection. Replaces the Mem0 client and must honor `userId`. |
 
 ## Official registry
 

integrations/eve/registry/README.md

@@ -2,7 +2,7 @@
 
 These files are the Mem0 side of `eve add memory/mem0`. They are not published in the npm tarball. Copy them into a PR against [vercel/eve](https://github.com/vercel/eve) after `@mem0/eve` is on npm.
 
-Supermemory's version of this change is [vercel/eve#2775](https://github.com/vercel/eve/pull/2775). Eve already asked Mem0 to own the package and open that PR.
+Supermemory's version of this change is [vercel/eve#2775](https://github.com/vercel/eve/pull/2775). Use that PR as the catalog/shape reference.
 
 ## What the Eve PR should do
 

integrations/eve/src/capture.ts

@@ -1,14 +1,23 @@
 import { completedTurnMessages, type ConversationMessage } from "./messages.js";
-import type { MemoryStore } from "./store.js";
+import type { MemoryStore, StoreMetadata } from "./store.js";
 
 export async function captureCompletedTurn(input: {
   store: MemoryStore;
   scopeKey: string;
+  operationId: string;
   infer: boolean;
-  metadata: Readonly<Record<string, unknown>>;
+  metadata: StoreMetadata;
   messages: readonly ConversationMessage[];
   turnInput: readonly ConversationMessage[];
 }): Promise<boolean> {
+  const existing = await input.store.listByMetadata({
+    userId: input.scopeKey,
+    metadata: { operation_id: input.operationId },
+  });
+  if (existing.length > 0) {
+    return false;
+  }
+
   const messages = completedTurnMessages({
     messages: input.messages,
     turnInput: input.turnInput,

integrations/eve/src/errors.ts

@@ -1,3 +1,39 @@
 export function errorMessage(error: unknown): string {
   return error instanceof Error ? error.message : "Unknown Mem0 error";
 }
+
+export function isSetupError(error: unknown): boolean {
+  if (!(error instanceof Error)) {
+    return false;
+  }
+  const text = `${error.name} ${error.message}`.toLowerCase();
+  return (
+    text.includes("api key") ||
+    text.includes("cannot be empty") ||
+    text.includes("authentication") ||
+    text.includes("unauthorized") ||
+    text.includes("401") ||
+    text.includes("403")
+  );
+}
+
+export function isNotFoundError(error: unknown): boolean {
+  if (!(error instanceof Error)) {
+    return false;
+  }
+  const text = `${error.name} ${error.message}`.toLowerCase();
+  return text.includes("not found") || text.includes("404");
+}
+
+export function logProviderError(
+  scope: string,
+  error: unknown,
+  extra: Readonly<Record<string, unknown>>,
+): void {
+  console.error(`[@mem0/eve] ${scope}`, {
+    error,
+    name: error instanceof Error ? error.name : undefined,
+    message: errorMessage(error),
+    ...extra,
+  });
+}

integrations/eve/src/idempotency.ts

@@ -1,5 +1,7 @@
 const DEFAULT_LIMIT = 256;
 
+// In-process fast path only. Durable replay after restart is handled by
+// listing memories with metadata.operation_id before add.
 export function createIdempotencyGate(limit = DEFAULT_LIMIT) {
   const seen = new Map<string, Promise<void>>();
 

integrations/eve/src/index.ts

@@ -1,3 +1,8 @@
 export { mem0Provider, mem0Provider as default } from "./provider.js";
-export type { Mem0ApiKey, Mem0ProviderOptions } from "./options.js";
+export type {
+  Mem0ApiKey,
+  Mem0InjectedProviderOptions,
+  Mem0ProviderOptions,
+  Mem0RemoteProviderOptions,
+} from "./options.js";
 export type { MemoryStore, MemoryMessage, SearchHit } from "./store.js";

integrations/eve/src/messages.ts

@@ -5,27 +5,29 @@ export interface ConversationMessage {
   readonly content: unknown;
 }
 
+function textFromPart(part: unknown): string {
+  if (typeof part === "string") {
+    return part;
+  }
+  if (part && typeof part === "object" && "text" in part) {
+    const text = (part as { text: unknown }).text;
+    return typeof text === "string" ? text : "";
+  }
+  return "";
+}
+
 export function extractText(content: unknown): string {
   if (typeof content === "string") {
     return content.trim();
   }
+  if (content && typeof content === "object" && !Array.isArray(content)) {
+    return textFromPart(content).trim();
+  }
   if (!Array.isArray(content)) {
     return "";
   }
 
-  return content
+  return content.map(textFromPart).join("\n").trim();
-    .map((part) => {
-      if (typeof part === "string") {
-        return part;
-      }
-      if (part && typeof part === "object" && "text" in part) {
-        const text = (part as { text: unknown }).text;
-        return typeof text === "string" ? text : "";
-      }
-      return "";
-    })
-    .join("\n")
-    .trim();
 }
 
 export function lastUserText(messages: readonly ConversationMessage[]): string {
@@ -70,6 +72,7 @@ export function completedTurnMessages(input: {
     return [];
   }
 
+  // Pair this turn's users with the latest assistant in the settled history.
   const history = conversationMessages(input.messages);
   const lastAssistant = [...history]
     .reverse()

integrations/eve/src/options.ts

@@ -2,9 +2,7 @@ import type { MemoryStore } from "./store.js";
 
 export type Mem0ApiKey = string | (() => string | Promise<string>);
 
-export interface Mem0ProviderOptions {
+export interface Mem0SharedProviderOptions {
-  readonly apiKey: Mem0ApiKey;
-  readonly host?: string;
   readonly topK?: number;
   readonly threshold?: number;
   readonly rerank?: boolean;
@@ -16,11 +14,23 @@ export interface Mem0ProviderOptions {
     readonly enabled?: boolean;
   };
   readonly metadata?: Readonly<Record<string, string | number | boolean>>;
-  readonly store?: MemoryStore;
 }
 
-export interface ResolvedMem0ProviderOptions {
+export interface Mem0RemoteProviderOptions extends Mem0SharedProviderOptions {
   readonly apiKey: Mem0ApiKey;
+  readonly host?: string;
+}
+
+export interface Mem0InjectedProviderOptions extends Mem0SharedProviderOptions {
+  readonly store: MemoryStore;
+  readonly apiKey?: Mem0ApiKey;
+  readonly host?: string;
+}
+
+export type Mem0ProviderOptions = Mem0RemoteProviderOptions | Mem0InjectedProviderOptions;
+
+export interface ResolvedMem0ProviderOptions {
+  readonly apiKey?: Mem0ApiKey;
   readonly host: string;
   readonly topK: number;
   readonly threshold: number;
@@ -36,13 +46,38 @@ export interface ResolvedMem0ProviderOptions {
   readonly store?: MemoryStore;
 }
 
+function validateApiKey(apiKey: Mem0ApiKey): void {
+  if (typeof apiKey === "string" && apiKey.trim().length === 0) {
+    throw new Error("Mem0 API key cannot be empty");
+  }
+}
+
+function resolveHost(host: string | undefined): string {
+  const trimmed = host?.trim() ?? "";
+  if (trimmed.length === 0) {
+    return "https://api.mem0.ai";
+  }
+
+  let parsed: URL;
+  try {
+    parsed = new URL(trimmed);
+  } catch {
+    throw new Error("host must be an http or https URL");
+  }
+  if (parsed.protocol !== "http:" && parsed.protocol !== "https:") {
+    throw new Error("host must be an http or https URL");
+  }
+  return trimmed;
+}
+
 export function resolveOptions(options: Mem0ProviderOptions): ResolvedMem0ProviderOptions {
+  const store = "store" in options ? options.store : undefined;
   const apiKey = options.apiKey;
-  if (typeof apiKey === "string") {
+  if (!store && apiKey === undefined) {
-    const trimmed = apiKey.trim();
+    throw new Error("apiKey is required unless a store is provided");
-    if (trimmed.length === 0) {
+  }
-      throw new Error("Mem0 API key cannot be empty");
+  if (apiKey !== undefined) {
-    }
+    validateApiKey(apiKey);
   }
 
   const topK = options.topK ?? 5;
@@ -56,8 +91,8 @@ export function resolveOptions(options: Mem0ProviderOptions): ResolvedMem0Provid
   }
 
   return {
-    apiKey,
+    ...(apiKey !== undefined ? { apiKey } : {}),
-    host: options.host ?? "https://api.mem0.ai",
+    host: resolveHost(options.host),
     topK,
     threshold,
     rerank: options.rerank ?? false,
@@ -69,6 +104,6 @@ export function resolveOptions(options: Mem0ProviderOptions): ResolvedMem0Provid
       enabled: options.capture?.enabled ?? true,
     },
     metadata: options.metadata ?? {},
-    ...(options.store ? { store: options.store } : {}),
+    ...(store ? { store } : {}),
   };
 }

integrations/eve/src/provider.ts

@@ -1,11 +1,11 @@
 import { defineMemoryProvider, type MemoryProvider } from "eve/memory";
 import { captureCompletedTurn } from "./capture.js";
-import { errorMessage } from "./errors.js";
+import { isSetupError, logProviderError } from "./errors.js";
 import { createIdempotencyGate } from "./idempotency.js";
 import { lastUserText, type ConversationMessage } from "./messages.js";
 import { resolveOptions, type Mem0ProviderOptions } from "./options.js";
 import { recallMemories } from "./recall.js";
-import { createMem0Store, type MemoryStore } from "./store.js";
+import { createLazyStore, createMem0Store, type MemoryStore } from "./store.js";
 import { createMem0Tools } from "./tools.js";
 
 function asConversation(messages: readonly unknown[]): ConversationMessage[] {
@@ -14,7 +14,9 @@ function asConversation(messages: readonly unknown[]): ConversationMessage[] {
       return false;
     }
     return (
-      "role" in message && typeof (message as { role: unknown }).role === "string"
+      "role" in message &&
+      typeof (message as { role: unknown }).role === "string" &&
+      "content" in message
     );
   });
 }
@@ -22,17 +24,21 @@ function asConversation(messages: readonly unknown[]): ConversationMessage[] {
 export function mem0Provider(options: Mem0ProviderOptions): MemoryProvider {
   const config = resolveOptions(options);
   const once = createIdempotencyGate();
-  let storePromise: Promise<MemoryStore> | undefined;
+  const loadRemoteStore = createLazyStore(async () => {
+    if (!config.apiKey) {
+      throw new Error("Mem0 API key cannot be empty");
+    }
+    return createMem0Store({
+      apiKey: config.apiKey,
+      host: config.host,
+    });
+  });
 
   const getStore = async (): Promise<MemoryStore> => {
     if (config.store) {
       return config.store;
     }
-    storePromise ??= createMem0Store({
+    return loadRemoteStore();
-      apiKey: config.apiKey,
-      host: config.host,
-    });
-    return storePromise;
   };
 
   const recall = async (context: {
@@ -47,7 +53,13 @@ export function mem0Provider(options: Mem0ProviderOptions): MemoryProvider {
     }
 
     const querySource = context.turn?.input ?? context.messages;
-    const query = lastUserText(asConversation(querySource));
+    const conversation = asConversation(querySource);
+    if (querySource.length > 0 && conversation.length === 0) {
+      console.error("[@mem0/eve] dropped all recall messages; no searchable user text", {
+        sessionId: context.session.id,
+      });
+    }
+    const query = lastUserText(conversation);
 
     try {
       const store = await getStore();
@@ -60,14 +72,13 @@ export function mem0Provider(options: Mem0ProviderOptions): MemoryProvider {
         rerank: config.rerank,
       });
     } catch (error) {
-      if (context.abortSignal.aborted) {
+      if (context.abortSignal.aborted || isSetupError(error)) {
         throw error;
       }
-      console.error("[@mem0/eve] recall failed", {
+      logProviderError("recall failed", error, {
-        error: errorMessage(error),
         sessionId: context.session.id,
       });
-      return null;
+      throw error;
     }
   };
 
@@ -80,41 +91,36 @@ export function mem0Provider(options: Mem0ProviderOptions): MemoryProvider {
       ? {
           capture: {
             async "turn.completed"(context) {
-              try {
+              const store = await getStore();
-                const store = await getStore();
+              await once(context.operationId, async () => {
-                await once(context.operationId, async () => {
+                await captureCompletedTurn({
-                  await captureCompletedTurn({
+                  store,
-                    store,
+                  scopeKey: context.memory.scope.key,
-                    scopeKey: context.memory.scope.key,
+                  operationId: context.operationId,
-                    infer: config.infer,
+                  infer: config.infer,
-                    metadata: {
+                  metadata: {
-                      ...config.metadata,
+                    ...config.metadata,
-                      source: "eve",
+                    source: "eve",
-                      operation_id: context.operationId,
+                    operation_id: context.operationId,
-                      session_id: context.session.id,
+                    session_id: context.session.id,
-                      slot: context.memory.slot,
+                    slot: context.memory.slot,
-                    },
+                  },
-                    messages: asConversation(context.messages),
+                  messages: asConversation(context.messages),
-                    turnInput: asConversation(context.turn.input),
+                  turnInput: asConversation(context.turn.input),
-                  });
                 });
-              } catch (error) {
+              });
-                if (context.abortSignal.aborted) {
-                  throw error;
-                }
-                console.error("[@mem0/eve] capture failed", {
-                  error: errorMessage(error),
-                  sessionId: context.session.id,
-                  turnId: context.turn.id,
-                });
-              }
             },
           },
         }
       : {}),
     async tools(context) {
       const store = await getStore();
-      return createMem0Tools(store, context.memory.scope.key);
+      return createMem0Tools(store, context.memory.scope.key, {
+        topK: config.topK,
+        threshold: config.threshold,
+        rerank: config.rerank,
+        infer: config.infer,
+      });
     },
   });
 }

integrations/eve/src/recall.ts

@@ -7,8 +7,9 @@ export interface RecallMessage {
 
 export function formatRecallMessages(hits: readonly SearchHit[]): RecallMessage[] {
   return hits.flatMap((hit) => {
+    const id = hit.id.trim();
     const content = hit.memory.trim();
-    return content.length > 0 ? [{ id: hit.id, content }] : [];
+    return id.length > 0 && content.length > 0 ? [{ id, content }] : [];
   });
 }
 
@@ -26,7 +27,7 @@ export async function recallMemories(input: {
   }
 
   const { results } = await input.store.search(query, {
-    filters: { user_id: input.scopeKey },
+    userId: input.scopeKey,
     topK: input.topK,
     threshold: input.threshold,
     rerank: input.rerank,

integrations/eve/src/store.ts

@@ -1,4 +1,5 @@
 import type { Mem0ApiKey } from "./options.js";
+import { isNotFoundError } from "./errors.js";
 
 export type MemoryRole = "user" | "assistant";
 
@@ -12,25 +13,94 @@ export interface SearchHit {
   readonly memory: string;
 }
 
-export interface AddMemoryInput {
+export interface MemoryRecord {
+  readonly id: string;
   readonly userId: string;
-  readonly infer: boolean;
   readonly metadata: Readonly<Record<string, unknown>>;
 }
 
+export type StoreMetadata = Readonly<Record<string, string | number | boolean>>;
+
+export interface AddMemoryInput {
+  readonly userId: string;
+  readonly infer: boolean;
+  readonly metadata: StoreMetadata;
+}
+
 export interface SearchMemoryInput {
-  readonly filters: {
+  readonly userId: string;
-    readonly user_id: string;
-  };
   readonly topK: number;
   readonly threshold: number;
   readonly rerank: boolean;
 }
 
 export interface MemoryStore {
-  add(messages: readonly MemoryMessage[], input: AddMemoryInput): Promise<unknown>;
+  add(messages: readonly MemoryMessage[], input: AddMemoryInput): Promise<void>;
   search(query: string, input: SearchMemoryInput): Promise<{ results: readonly SearchHit[] }>;
-  delete(memoryId: string): Promise<unknown>;
+  get(memoryId: string): Promise<MemoryRecord | null>;
+  listByMetadata(input: {
+    readonly userId: string;
+    readonly metadata: Readonly<Record<string, string>>;
+  }): Promise<readonly MemoryRecord[]>;
+  delete(memoryId: string, userId: string): Promise<void>;
+}
+
+export function parseSearchHit(item: unknown): SearchHit | null {
+  if (!item || typeof item !== "object") {
+    return null;
+  }
+  const record = item as Record<string, unknown>;
+  const nested =
+    record.data && typeof record.data === "object"
+      ? (record.data as Record<string, unknown>)
+      : undefined;
+  const idValue = record.id ?? record.memory_id ?? nested?.id;
+  const id =
+    typeof idValue === "string"
+      ? idValue.trim()
+      : typeof idValue === "number"
+        ? String(idValue)
+        : "";
+  const memoryValue =
+    record.memory ?? record.text ?? nested?.memory ?? nested?.text;
+  const memory = typeof memoryValue === "string" ? memoryValue : "";
+  if (id.length === 0 || memory.trim().length === 0) {
+    return null;
+  }
+  return { id, memory };
+}
+
+export function parseMemoryRecord(item: unknown): MemoryRecord | null {
+  if (!item || typeof item !== "object") {
+    return null;
+  }
+  const record = item as Record<string, unknown>;
+  const idValue = record.id ?? record.memory_id;
+  const id = typeof idValue === "string" ? idValue.trim() : "";
+  const userIdValue = record.userId ?? record.user_id;
+  const userId = typeof userIdValue === "string" ? userIdValue : "";
+  if (id.length === 0 || userId.length === 0) {
+    return null;
+  }
+  const metadata =
+    record.metadata && typeof record.metadata === "object"
+      ? (record.metadata as Record<string, unknown>)
+      : {};
+  return { id, userId, metadata };
+}
+
+function asItemList(response: unknown, operation: string): unknown[] {
+  if (Array.isArray(response)) {
+    return response;
+  }
+  if (response && typeof response === "object") {
+    const record = response as Record<string, unknown>;
+    const raw = record.results ?? record.memories;
+    if (Array.isArray(raw)) {
+      return raw;
+    }
+  }
+  throw new Error(`Mem0 ${operation} returned an unexpected response shape`);
 }
 
 export async function resolveApiKey(apiKey: Mem0ApiKey): Promise<string> {
@@ -42,6 +112,20 @@ export async function resolveApiKey(apiKey: Mem0ApiKey): Promise<string> {
   return trimmed;
 }
 
+export function createLazyStore(factory: () => Promise<MemoryStore>) {
+  let pending: Promise<MemoryStore> | undefined;
+
+  return async (): Promise<MemoryStore> => {
+    if (!pending) {
+      pending = factory().catch((error: unknown) => {
+        pending = undefined;
+        throw error;
+      });
+    }
+    return pending;
+  };
+}
+
 export async function createMem0Store(input: {
   apiKey: Mem0ApiKey;
   host: string;
@@ -52,9 +136,9 @@ export async function createMem0Store(input: {
     host: input.host,
   });
 
-  return {
+  const store: MemoryStore = {
     async add(messages, options) {
-      return client.add([...messages], {
+      await client.add([...messages], {
         userId: options.userId,
         infer: options.infer,
         metadata: { ...options.metadata },
@@ -62,22 +146,47 @@ export async function createMem0Store(input: {
     },
     async search(query, options) {
       const response = await client.search(query, {
-        filters: options.filters,
+        filters: { user_id: options.userId },
         topK: options.topK,
         threshold: options.threshold,
         rerank: options.rerank,
       });
-      const results = Array.isArray(response?.results) ? response.results : [];
       return {
-        results: results.flatMap((item) => {
+        results: asItemList(response, "search").flatMap((item) => {
-          const id = typeof item.id === "string" ? item.id : "";
+          const hit = parseSearchHit(item);
-          const memory = typeof item.memory === "string" ? item.memory : "";
+          return hit ? [hit] : [];
-          return id && memory ? [{ id, memory }] : [];
         }),
       };
     },
-    async delete(memoryId) {
+    async get(memoryId) {
-      return client.delete(memoryId);
+      try {
+        return parseMemoryRecord(await client.get(memoryId));
+      } catch (error) {
+        if (isNotFoundError(error)) {
+          return null;
+        }
+        throw error;
+      }
+    },
+    async listByMetadata({ userId, metadata }) {
+      const response = await client.getAll({
+        filters: {
+          AND: [{ user_id: userId }, { metadata }],
+        },
+        pageSize: 5,
+      });
+      return asItemList(response, "getAll").flatMap((item) => {
+        const record = parseMemoryRecord(item);
+        return record && record.userId === userId ? [record] : [];
+      });
+    },
+    async delete(memoryId, userId) {
+      const record = await store.get(memoryId);
+      if (!record || record.userId !== userId) {
+        throw new Error("Memory not found");
+      }
+      await client.delete(memoryId);
     },
   };
+  return store;
 }

integrations/eve/src/tools.ts

@@ -2,7 +2,18 @@ import { defineTool } from "eve/tools";
 import { z } from "zod";
 import type { MemoryStore } from "./store.js";
 
-export function createMem0Tools(store: MemoryStore, scopeKey: string) {
+export interface Mem0ToolOptions {
+  readonly topK: number;
+  readonly threshold: number;
+  readonly rerank: boolean;
+  readonly infer: boolean;
+}
+
+export function createMem0Tools(
+  store: MemoryStore,
+  scopeKey: string,
+  options: Mem0ToolOptions,
+) {
   return {
     search: defineTool({
       description: "Search long-term memories for the current caller.",
@@ -11,10 +22,10 @@ export function createMem0Tools(store: MemoryStore, scopeKey: string) {
       }),
       async execute({ query }) {
         const { results } = await store.search(query, {
-          filters: { user_id: scopeKey },
+          userId: scopeKey,
-          topK: 8,
+          topK: options.topK,
-          threshold: 0.1,
+          threshold: options.threshold,
-          rerank: false,
+          rerank: options.rerank,
         });
         return {
           memories: results.map((hit) => ({
@@ -33,7 +44,7 @@ export function createMem0Tools(store: MemoryStore, scopeKey: string) {
       async execute({ text }) {
         await store.add([{ role: "user", content: text }], {
           userId: scopeKey,
-          infer: true,
+          infer: options.infer,
           metadata: { source: "eve-tool" },
         });
         return { saved: true };
@@ -45,7 +56,7 @@ export function createMem0Tools(store: MemoryStore, scopeKey: string) {
         id: z.string().min(1),
       }),
       async execute({ id }) {
-        await store.delete(id);
+        await store.delete(id, scopeKey);
         return { deleted: true };
       },
     }),

integrations/eve/tests/capture.test.ts

@@ -8,8 +8,9 @@ describe("captureCompletedTurn", () => {
     const captured = await captureCompletedTurn({
       store,
       scopeKey: "scope_abc",
-      infer: true,
+      operationId: "op_1",
-      metadata: { source: "eve" },
+      infer: false,
+      metadata: { source: "eve", operation_id: "op_1" },
       turnInput: [{ role: "user", content: "I am vegetarian" }],
       messages: [
         { role: "user", content: "I am vegetarian" },
@@ -21,6 +22,8 @@ describe("captureCompletedTurn", () => {
     expect(store.added).toEqual([
       {
         userId: "scope_abc",
+        infer: false,
+        metadata: { source: "eve", operation_id: "op_1" },
         messages: [
           { role: "user", content: "I am vegetarian" },
           { role: "assistant", content: "Got it." },
@@ -34,12 +37,38 @@ describe("captureCompletedTurn", () => {
     const captured = await captureCompletedTurn({
       store,
       scopeKey: "scope_abc",
+      operationId: "op_1",
       infer: true,
-      metadata: {},
+      metadata: { operation_id: "op_1" },
       turnInput: [],
       messages: [],
     });
     expect(captured).toBe(false);
     expect(store.added).toEqual([]);
   });
+
+  it("skips add when the operation id was already captured", async () => {
+    const store = createFakeStore([
+      {
+        id: "mem_existing",
+        memory: "already stored",
+        metadata: { operation_id: "op_replay" },
+      },
+    ]);
+    const captured = await captureCompletedTurn({
+      store,
+      scopeKey: "scope_abc",
+      operationId: "op_replay",
+      infer: true,
+      metadata: { operation_id: "op_replay" },
+      turnInput: [{ role: "user", content: "I am vegetarian" }],
+      messages: [
+        { role: "user", content: "I am vegetarian" },
+        { role: "assistant", content: "Got it." },
+      ],
+    });
+
+    expect(captured).toBe(false);
+    expect(store.added).toEqual([]);
+  });
 });

integrations/eve/tests/errors.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it, vi } from "vitest";
+import {
+  errorMessage,
+  isNotFoundError,
+  isSetupError,
+  logProviderError,
+} from "../src/errors.js";
+
+describe("errors", () => {
+  it("classifies setup and not-found errors", () => {
+    expect(isSetupError(new Error("Mem0 API key cannot be empty"))).toBe(true);
+    expect(isSetupError(Object.assign(new Error("denied"), { name: "AuthenticationError" }))).toBe(
+      true,
+    );
+    expect(isSetupError(new Error("mem0 down"))).toBe(false);
+    expect(isNotFoundError(new Error("Memory not found"))).toBe(true);
+    expect(isNotFoundError(new Error("HTTP 404"))).toBe(true);
+    expect(errorMessage("x")).toBe("Unknown Mem0 error");
+  });
+
+  it("logs the original error object", () => {
+    const error = vi.spyOn(console, "error").mockImplementation(() => {});
+    const failure = Object.assign(new Error("HTTP 401"), {
+      name: "AuthenticationError",
+    });
+    try {
+      logProviderError("recall failed", failure, { sessionId: "sess_1" });
+      expect(error).toHaveBeenCalledWith("[@mem0/eve] recall failed", {
+        error: failure,
+        name: "AuthenticationError",
+        message: "HTTP 401",
+        sessionId: "sess_1",
+      });
+    } finally {
+      error.mockRestore();
+    }
+  });
+});

integrations/eve/tests/helpers.ts

@@ -1,29 +1,86 @@
-import type { MemoryMessage, MemoryStore, SearchHit } from "../src/store.js";
+import type {
+  AddMemoryInput,
+  MemoryMessage,
+  MemoryRecord,
+  MemoryStore,
+  SearchHit,
+  SearchMemoryInput,
+} from "../src/store.js";
 
-export function createFakeStore(hits: SearchHit[] = []): MemoryStore & {
+export type FakeHit = SearchHit & {
-  added: Array<{ messages: readonly MemoryMessage[]; userId: string }>;
+  readonly userId?: string;
-  searched: Array<{ query: string; userId: string }>;
+  readonly metadata?: Readonly<Record<string, unknown>>;
+};
+
+export type FakeAdd = {
+  messages: readonly MemoryMessage[];
+  userId: string;
+  infer: boolean;
+  metadata: Readonly<Record<string, unknown>>;
+};
+
+export type FakeSearch = SearchMemoryInput & {
+  query: string;
+};
+
+export function createFakeStore(hits: FakeHit[] = []): MemoryStore & {
+  added: FakeAdd[];
+  searched: FakeSearch[];
   deleted: string[];
+  records: MemoryRecord[];
 } {
-  const added: Array<{ messages: readonly MemoryMessage[]; userId: string }> = [];
+  const added: FakeAdd[] = [];
-  const searched: Array<{ query: string; userId: string }> = [];
+  const searched: FakeSearch[] = [];
   const deleted: string[] = [];
+  const records: MemoryRecord[] = hits.map((hit) => ({
+    id: hit.id,
+    userId: hit.userId ?? "scope_abc",
+    metadata: hit.metadata ?? {},
+  }));
 
   return {
     added,
     searched,
     deleted,
+    records,
     async add(messages, input) {
-      added.push({ messages, userId: input.userId });
+      added.push({
-      return { eventId: "evt_1" };
+        messages,
+        userId: input.userId,
+        infer: input.infer,
+        metadata: input.metadata,
+      });
+      records.push({
+        id: `mem_added_${added.length}`,
+        userId: input.userId,
+        metadata: input.metadata,
+      });
     },
     async search(query, input) {
-      searched.push({ query, userId: input.filters.user_id });
+      searched.push({ query, ...input });
-      return { results: hits };
+      return {
+        results: hits.filter((hit) => (hit.userId ?? "scope_abc") === input.userId),
+      };
     },
-    async delete(memoryId) {
+    async get(memoryId) {
+      return records.find((record) => record.id === memoryId) ?? null;
+    },
+    async listByMetadata({ userId, metadata }) {
+      return records.filter((record) => {
+        if (record.userId !== userId) {
+          return false;
+        }
+        return Object.entries(metadata).every(
+          ([key, value]) => record.metadata[key] === value,
+        );
+      });
+    },
+    async delete(memoryId, userId) {
+      const record = records.find((item) => item.id === memoryId);
+      if (!record || record.userId !== userId) {
+        throw new Error("Memory not found");
+      }
       deleted.push(memoryId);
-      return { message: "ok" };
     },
   };
 }
@@ -31,6 +88,14 @@ export function createFakeStore(hits: SearchHit[] = []): MemoryStore & {
 export function memoryContext(input?: {
   scopeKey?: string;
   operationId?: string;
+  aborted?: boolean;
+  turn?:
+    | {
+        id?: string;
+        sequence?: number;
+        input: Array<{ role: string; content: unknown }>;
+      }
+    | null;
   turnInput?: Array<{ role: string; content: unknown }>;
   messages?: Array<{ role: string; content: unknown }>;
 }): {
@@ -46,10 +111,21 @@ export function memoryContext(input?: {
     id: string;
     sequence: number;
     input: Array<{ role: string; content: unknown }>;
-  };
+  } | null;
 } {
+  const controller = new AbortController();
+  if (input?.aborted) {
+    controller.abort();
+  }
+
+  const turnInput =
+    input?.turn === null
+      ? undefined
+      : (input?.turn?.input ??
+        input?.turnInput ?? [{ role: "user", content: "I am vegetarian" }]);
+
   return {
-    abortSignal: new AbortController().signal,
+    abortSignal: controller.signal,
     operationId: input?.operationId ?? "op_1",
     session: { id: "sess_1" },
     memory: {
@@ -64,10 +140,13 @@ export function memoryContext(input?: {
       { role: "user", content: "I am vegetarian" },
       { role: "assistant", content: "I will remember that." },
     ],
-    turn: {
+    turn:
-      id: "turn_1",
+      input?.turn === null
-      sequence: 1,
+        ? null
-      input: input?.turnInput ?? [{ role: "user", content: "I am vegetarian" }],
+        : {
-    },
+            id: input?.turn?.id ?? "turn_1",
+            sequence: input?.turn?.sequence ?? 1,
+            input: turnInput ?? [{ role: "user", content: "I am vegetarian" }],
+          },
   };
 }

integrations/eve/tests/idempotency.test.ts

@@ -29,4 +29,19 @@ describe("createIdempotencyGate", () => {
     await once("op_1", work);
     expect(calls).toBe(2);
   });
+
+  it("evicts the oldest id after the cap", async () => {
+    const once = createIdempotencyGate(2);
+    let calls = 0;
+    const work = async () => {
+      calls += 1;
+    };
+
+    await once("op_1", work);
+    await once("op_2", work);
+    await once("op_3", work);
+    await once("op_1", work);
+
+    expect(calls).toBe(4);
+  });
 });

integrations/eve/tests/messages.test.ts

@@ -20,6 +20,10 @@ describe("extractText", () => {
     ).toBe("I like\ntea");
   });
 
+  it("reads a single text object", () => {
+    expect(extractText({ type: "text", text: "  solo  " })).toBe("solo");
+  });
+
   it("ignores non-text parts", () => {
     expect(extractText([{ type: "image", url: "x" }])).toBe("");
   });

integrations/eve/tests/options.test.ts

@@ -4,7 +4,8 @@ import { createFakeStore } from "./helpers.js";
 
 describe("resolveOptions", () => {
   it("applies defaults", () => {
-    expect(resolveOptions({ apiKey: "m0-test" })).toMatchObject({
+    expect(resolveOptions({ apiKey: "m0-test" })).toEqual({
+      apiKey: "m0-test",
       host: "https://api.mem0.ai",
       topK: 5,
       threshold: 0.1,
@@ -12,6 +13,7 @@ describe("resolveOptions", () => {
       infer: true,
       autoSearch: { enabled: true },
       capture: { enabled: true },
+      metadata: {},
     });
   });
 
@@ -19,8 +21,56 @@ describe("resolveOptions", () => {
     expect(() => resolveOptions({ apiKey: "   " })).toThrow(/empty/);
   });
 
+  it("requires an api key when no store is provided", () => {
+    expect(() => resolveOptions({} as never)).toThrow(/apiKey is required/);
+  });
+
+  it("allows a store without an api key", () => {
+    const store = createFakeStore();
+    expect(resolveOptions({ store }).store).toBe(store);
+  });
+
+  it("does not invoke a function api key at resolve time", () => {
+    let calls = 0;
+    const apiKey = () => {
+      calls += 1;
+      return "";
+    };
+    expect(() => resolveOptions({ apiKey })).not.toThrow();
+    expect(calls).toBe(0);
+  });
+
   it("rejects an invalid topK", () => {
     expect(() => resolveOptions({ apiKey: "m0-test", topK: 0 })).toThrow(/topK/);
+    expect(() => resolveOptions({ apiKey: "m0-test", topK: 101 })).toThrow(/topK/);
+    expect(() => resolveOptions({ apiKey: "m0-test", topK: 1.5 })).toThrow(/topK/);
+  });
+
+  it("rejects an invalid threshold", () => {
+    expect(() => resolveOptions({ apiKey: "m0-test", threshold: -0.1 })).toThrow(
+      /threshold/,
+    );
+    expect(() => resolveOptions({ apiKey: "m0-test", threshold: 1.1 })).toThrow(
+      /threshold/,
+    );
+    expect(() => resolveOptions({ apiKey: "m0-test", threshold: Number.NaN })).toThrow(
+      /threshold/,
+    );
+  });
+
+  it("rejects a non-http host", () => {
+    expect(() => resolveOptions({ apiKey: "m0-test", host: "localhost" })).toThrow(
+      /host/,
+    );
+    expect(() => resolveOptions({ apiKey: "m0-test", host: "ftp://mem0.ai" })).toThrow(
+      /host/,
+    );
+  });
+
+  it("treats a blank host as the default", () => {
+    expect(resolveOptions({ apiKey: "m0-test", host: "   " }).host).toBe(
+      "https://api.mem0.ai",
+    );
   });
 
   it("keeps an injected store", () => {

integrations/eve/tests/provider.test.ts

@@ -1,4 +1,5 @@
 import type {
+  MemoryCompactionCompletedContext,
   MemoryToolsContext,
   MemoryTurnCompletedContext,
   MemoryTurnStartedContext,
@@ -19,6 +20,15 @@ function completedContext(
   return memoryContext(input) as unknown as MemoryTurnCompletedContext;
 }
 
+function compactionContext(
+  input?: Parameters<typeof memoryContext>[0],
+): MemoryCompactionCompletedContext {
+  return memoryContext({
+    ...input,
+    turn: input?.turn === undefined ? null : input.turn,
+  }) as unknown as MemoryCompactionCompletedContext;
+}
+
 function toolsContext(
   input?: Parameters<typeof memoryContext>[0],
 ): MemoryToolsContext {
@@ -32,10 +42,20 @@ async function runTool(
   return tool.execute(input as never, {} as never);
 }
 
+function requireCapture(
+  provider: ReturnType<typeof mem0Provider>,
+): NonNullable<NonNullable<typeof provider.capture>["turn.completed"]> {
+  const capture = provider.capture?.["turn.completed"];
+  if (!capture) {
+    throw new Error("expected turn.completed");
+  }
+  return capture;
+}
+
 describe("mem0Provider", () => {
   it("recalls memories for the locked scope on turn start", async () => {
     const store = createFakeStore([{ id: "mem_1", memory: "User likes tea" }]);
-    const provider = mem0Provider({ apiKey: "m0-test", store });
+    const provider = mem0Provider({ store });
     const result = await provider.recall["turn.started"](
       startedContext({
         turnInput: [{ role: "user", content: "What do I drink?" }],
@@ -43,31 +63,110 @@ describe("mem0Provider", () => {
     );
 
     expect(store.searched).toEqual([
-      { query: "What do I drink?", userId: "scope_abc" },
+      {
+        query: "What do I drink?",
+        userId: "scope_abc",
+        topK: 5,
+        threshold: 0.1,
+        rerank: false,
+      },
     ]);
     expect(result).toEqual({
       messages: [{ id: "mem_1", content: "User likes tea" }],
     });
   });
 
-  it("does not fail the turn when search throws", async () => {
+  it("forwards recall search options", async () => {
+    const store = createFakeStore([{ id: "mem_1", memory: "User likes tea" }]);
+    const provider = mem0Provider({
+      store,
+      topK: 3,
+      threshold: 0.5,
+      rerank: true,
+    });
+    await provider.recall["turn.started"](
+      startedContext({
+        turnInput: [{ role: "user", content: "tea" }],
+      }),
+    );
+    expect(store.searched[0]).toMatchObject({
+      topK: 3,
+      threshold: 0.5,
+      rerank: true,
+    });
+  });
+
+  it("skips search when autoSearch is disabled", async () => {
+    const store = createFakeStore([{ id: "mem_1", memory: "User likes tea" }]);
+    const provider = mem0Provider({ store, autoSearch: { enabled: false } });
+    await expect(
+      provider.recall["turn.started"](startedContext()),
+    ).resolves.toBeNull();
+    expect(store.searched).toEqual([]);
+  });
+
+  it("recalls after compaction when turn is null", async () => {
+    const store = createFakeStore([{ id: "mem_1", memory: "User likes tea" }]);
+    const provider = mem0Provider({ store });
+    const recallAfterCompaction = provider.recall["compaction.completed"];
+    if (!recallAfterCompaction) {
+      throw new Error("expected compaction.completed");
+    }
+    const result = await recallAfterCompaction(
+      compactionContext({
+        messages: [
+          { role: "user", content: "What do I drink?" },
+          { role: "assistant", content: "tea" },
+        ],
+      }),
+    );
+
+    expect(store.searched).toEqual([
+      {
+        query: "What do I drink?",
+        userId: "scope_abc",
+        topK: 5,
+        threshold: 0.1,
+        rerank: false,
+      },
+    ]);
+    expect(result).toEqual({
+      messages: [{ id: "mem_1", content: "User likes tea" }],
+    });
+  });
+
+  it("fails the turn when search throws", async () => {
     const store = createFakeStore();
     store.search = async () => {
       throw new Error("mem0 down");
     };
-    const provider = mem0Provider({ apiKey: "m0-test", store });
+    const provider = mem0Provider({ store });
     const error = vi.spyOn(console, "error").mockImplementation(() => {});
 
-    await expect(
+    try {
-      provider.recall["turn.started"](startedContext()),
+      await expect(
-    ).resolves.toBeNull();
+        provider.recall["turn.started"](startedContext()),
+      ).rejects.toThrow("mem0 down");
+    } finally {
+      error.mockRestore();
+    }
+  });
 
-    error.mockRestore();
+  it("rethrows when recall is aborted", async () => {
+    const store = createFakeStore();
+    store.search = async () => {
+      throw new Error("cancelled");
+    };
+    const provider = mem0Provider({ store });
+
+    await expect(
+      provider.recall["turn.started"](startedContext({ aborted: true })),
+    ).rejects.toThrow("cancelled");
   });
 
   it("captures a completed turn once per operation id", async () => {
     const store = createFakeStore();
-    const provider = mem0Provider({ apiKey: "m0-test", store });
+    const provider = mem0Provider({ store });
     const capture = provider.capture?.["turn.completed"];
     expect(capture).toBeTypeOf("function");
 
@@ -76,12 +175,42 @@ describe("mem0Provider", () => {
     await capture!(context);
 
     expect(store.added).toHaveLength(1);
-    expect(store.added[0]?.userId).toBe("scope_abc");
+    expect(store.added[0]).toMatchObject({
+      userId: "scope_abc",
+      infer: true,
+      metadata: {
+        source: "eve",
+        operation_id: "op_replay",
+        session_id: "sess_1",
+        slot: "mem0",
+      },
+    });
+  });
+
+  it("does not recapture after process restart when operation metadata exists", async () => {
+    const store = createFakeStore();
+    const first = requireCapture(mem0Provider({ store }));
+    await first(completedContext({ operationId: "op_replay" }));
+
+    const restarted = requireCapture(mem0Provider({ store }));
+    await restarted(completedContext({ operationId: "op_replay" }));
+
+    expect(store.added).toHaveLength(1);
+  });
+
+  it("surfaces capture store failures", async () => {
+    const store = createFakeStore();
+    store.add = async () => {
+      throw new Error("write failed");
+    };
+
+    await expect(
+      requireCapture(mem0Provider({ store }))(completedContext()),
+    ).rejects.toThrow("write failed");
   });
 
   it("omits capture when it is disabled", () => {
     const provider = mem0Provider({
-      apiKey: "m0-test",
       store: createFakeStore(),
       capture: { enabled: false },
     });
@@ -90,7 +219,13 @@ describe("mem0Provider", () => {
 
   it("binds tools to the locked scope", async () => {
     const store = createFakeStore([{ id: "mem_1", memory: "likes tea" }]);
-    const provider = mem0Provider({ apiKey: "m0-test", store });
+    const provider = mem0Provider({
+      store,
+      topK: 3,
+      threshold: 0.4,
+      rerank: true,
+      infer: false,
+    });
     const tools = await provider.tools!(toolsContext());
     if (!tools) {
       throw new Error("expected tools");
@@ -114,8 +249,52 @@ describe("mem0Provider", () => {
     });
     expect(remember).toEqual({ saved: true });
     expect(forget).toEqual({ deleted: true });
-    expect(store.searched[0]?.userId).toBe("scope_abc");
+    expect(store.searched[0]).toMatchObject({
-    expect(store.added[0]?.userId).toBe("scope_abc");
+      userId: "scope_abc",
+      topK: 3,
+      threshold: 0.4,
+      rerank: true,
+    });
+    expect(store.added[0]).toMatchObject({
+      userId: "scope_abc",
+      infer: false,
+      metadata: { source: "eve-tool" },
+      messages: [{ role: "user", content: "Allergic to peanuts" }],
+    });
     expect(store.deleted).toEqual(["mem_1"]);
   });
+
+  it("refuses to forget a memory from another scope", async () => {
+    const store = createFakeStore([
+      { id: "mem_other", memory: "secret", userId: "scope_other" },
+    ]);
+    const provider = mem0Provider({ store });
+    const tools = await provider.tools!(toolsContext());
+    const forgetTool = tools?.forget;
+    if (!forgetTool) {
+      throw new Error("expected forget tool");
+    }
+
+    await expect(runTool(forgetTool, { id: "mem_other" })).rejects.toThrow(
+      /Memory not found/,
+    );
+    expect(store.deleted).toEqual([]);
+  });
+
+  it("surfaces tool store failures", async () => {
+    const store = createFakeStore();
+    store.add = async () => {
+      throw new Error("add failed");
+    };
+    const provider = mem0Provider({ store });
+    const tools = await provider.tools!(toolsContext());
+    const rememberTool = tools?.remember;
+    if (!rememberTool) {
+      throw new Error("expected remember tool");
+    }
+
+    await expect(
+      runTool(rememberTool, { text: "remember this" }),
+    ).rejects.toThrow("add failed");
+  });
 });

integrations/eve/tests/recall.test.ts

@@ -3,11 +3,12 @@ import { formatRecallMessages, recallMemories } from "../src/recall.js";
 import { createFakeStore } from "./helpers.js";
 
 describe("formatRecallMessages", () => {
-  it("drops empty memories", () => {
+  it("drops empty memories and empty ids", () => {
     expect(
       formatRecallMessages([
         { id: "1", memory: " likes tea " },
         { id: "2", memory: "   " },
+        { id: "  ", memory: "kept text" },
       ]),
     ).toEqual([{ id: "1", content: "likes tea" }]);
   });
@@ -20,13 +21,19 @@ describe("recallMemories", () => {
       store,
       scopeKey: "scope_abc",
       query: "What does the user drink?",
-      topK: 5,
+      topK: 3,
-      threshold: 0.1,
+      threshold: 0.5,
-      rerank: false,
+      rerank: true,
     });
 
     expect(store.searched).toEqual([
-      { query: "What does the user drink?", userId: "scope_abc" },
+      {
+        query: "What does the user drink?",
+        userId: "scope_abc",
+        topK: 3,
+        threshold: 0.5,
+        rerank: true,
+      },
     ]);
     expect(result).toEqual({
       messages: [{ id: "mem_1", content: "User likes tea" }],
@@ -47,4 +54,18 @@ describe("recallMemories", () => {
     ).resolves.toBeNull();
     expect(store.searched).toEqual([]);
   });
+
+  it("returns null when search has no usable hits", async () => {
+    const store = createFakeStore([{ id: "  ", memory: "   " }]);
+    await expect(
+      recallMemories({
+        store,
+        scopeKey: "scope_abc",
+        query: "tea",
+        topK: 5,
+        threshold: 0.1,
+        rerank: false,
+      }),
+    ).resolves.toBeNull();
+  });
 });

integrations/eve/tests/store.test.ts

@@ -0,0 +1,217 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const { MemoryClient, add, search, get, getAll, del } = vi.hoisted(() => {
+  const add = vi.fn();
+  const search = vi.fn();
+  const get = vi.fn();
+  const getAll = vi.fn();
+  const del = vi.fn();
+  const MemoryClient = vi.fn(
+    class {
+      add = add;
+      search = search;
+      get = get;
+      getAll = getAll;
+      delete = del;
+    },
+  );
+  return { MemoryClient, add, search, get, getAll, del };
+});
+
+vi.mock("mem0ai", () => ({
+  default: MemoryClient,
+}));
+
+import {
+  createLazyStore,
+  createMem0Store,
+  parseMemoryRecord,
+  parseSearchHit,
+  resolveApiKey,
+} from "../src/store.js";
+
+describe("parseSearchHit", () => {
+  it("accepts id, memory_id, nested text, and numeric ids", () => {
+    expect(parseSearchHit({ id: 12, memory: "tea" })).toEqual({
+      id: "12",
+      memory: "tea",
+    });
+    expect(
+      parseSearchHit({ memory_id: "m1", data: { memory: "nested" } }),
+    ).toEqual({ id: "m1", memory: "nested" });
+    expect(parseSearchHit({ id: "m2", text: "plain" })).toEqual({
+      id: "m2",
+      memory: "plain",
+    });
+    expect(parseSearchHit({ id: "", memory: "x" })).toBeNull();
+  });
+});
+
+describe("parseMemoryRecord", () => {
+  it("requires id and userId", () => {
+    expect(
+      parseMemoryRecord({
+        id: "m1",
+        user_id: "scope_abc",
+        metadata: { source: "eve" },
+      }),
+    ).toEqual({
+      id: "m1",
+      userId: "scope_abc",
+      metadata: { source: "eve" },
+    });
+    expect(parseMemoryRecord({ id: "m1" })).toBeNull();
+  });
+});
+
+describe("resolveApiKey", () => {
+  it("trims string keys and rejects empty values", async () => {
+    await expect(resolveApiKey("  token  ")).resolves.toBe("token");
+    await expect(resolveApiKey("   ")).rejects.toThrow(/empty/);
+  });
+
+  it("resolves async getters", async () => {
+    await expect(resolveApiKey(async () => "  secret  ")).resolves.toBe("secret");
+    await expect(resolveApiKey(async () => "")).rejects.toThrow(/empty/);
+  });
+});
+
+describe("createLazyStore", () => {
+  it("retries after a failed factory call", async () => {
+    let calls = 0;
+    const load = createLazyStore(async () => {
+      calls += 1;
+      if (calls === 1) {
+        throw new Error("unavailable");
+      }
+      return { name: "store" } as never;
+    });
+
+    await expect(load()).rejects.toThrow("unavailable");
+    await expect(load()).resolves.toEqual({ name: "store" });
+    expect(calls).toBe(2);
+  });
+});
+
+describe("createMem0Store", () => {
+  beforeEach(() => {
+    add.mockReset();
+    search.mockReset();
+    get.mockReset();
+    getAll.mockReset();
+    del.mockReset();
+    MemoryClient.mockClear();
+  });
+
+  it("constructs the client with a resolved key and host", async () => {
+    const store = await createMem0Store({
+      apiKey: async () => "  m0-live  ",
+      host: "https://api.mem0.ai",
+    });
+    expect(store).toBeTruthy();
+    expect(MemoryClient).toHaveBeenCalledWith({
+      apiKey: "m0-live",
+      host: "https://api.mem0.ai",
+    });
+  });
+
+  it("forwards add, search, and metadata filters", async () => {
+    search.mockResolvedValue({
+      results: [{ id: "m1", memory: "likes tea" }, { id: 2, memory: "" }],
+    });
+    getAll.mockResolvedValue({
+      results: [{ id: "m9", userId: "scope_abc", metadata: { operation_id: "op_1" } }],
+    });
+    add.mockResolvedValue({ eventId: "evt_1" });
+
+    const store = await createMem0Store({
+      apiKey: "m0-test",
+      host: "https://api.mem0.ai",
+    });
+
+    await store.add([{ role: "user", content: "I like tea" }], {
+      userId: "scope_abc",
+      infer: false,
+      metadata: { source: "eve", operation_id: "op_1" },
+    });
+    const found = await store.search("tea", {
+      userId: "scope_abc",
+      topK: 3,
+      threshold: 0.5,
+      rerank: true,
+    });
+    const existing = await store.listByMetadata({
+      userId: "scope_abc",
+      metadata: { operation_id: "op_1" },
+    });
+
+    expect(add).toHaveBeenCalledWith(
+      [{ role: "user", content: "I like tea" }],
+      {
+        userId: "scope_abc",
+        infer: false,
+        metadata: { source: "eve", operation_id: "op_1" },
+      },
+    );
+    expect(search).toHaveBeenCalledWith("tea", {
+      filters: { user_id: "scope_abc" },
+      topK: 3,
+      threshold: 0.5,
+      rerank: true,
+    });
+    expect(found.results).toEqual([{ id: "m1", memory: "likes tea" }]);
+    expect(existing).toEqual([
+      {
+        id: "m9",
+        userId: "scope_abc",
+        metadata: { operation_id: "op_1" },
+      },
+    ]);
+  });
+
+  it("accepts a bare search array and rejects unknown envelopes", async () => {
+    const store = await createMem0Store({
+      apiKey: "m0-test",
+      host: "https://api.mem0.ai",
+    });
+    search.mockResolvedValueOnce([{ id: "m1", memory: "tea" }]);
+    await expect(
+      store.search("tea", {
+        userId: "scope_abc",
+        topK: 5,
+        threshold: 0.1,
+        rerank: false,
+      }),
+    ).resolves.toEqual({ results: [{ id: "m1", memory: "tea" }] });
+
+    search.mockResolvedValueOnce({ memories: "nope" });
+    await expect(
+      store.search("tea", {
+        userId: "scope_abc",
+        topK: 5,
+        threshold: 0.1,
+        rerank: false,
+      }),
+    ).rejects.toThrow(/unexpected response shape/);
+  });
+
+  it("deletes only when the memory belongs to the scope", async () => {
+    const store = await createMem0Store({
+      apiKey: "m0-test",
+      host: "https://api.mem0.ai",
+    });
+
+    get.mockResolvedValueOnce({ id: "m1", userId: "scope_abc" });
+    await store.delete("m1", "scope_abc");
+    expect(del).toHaveBeenCalledWith("m1");
+
+    get.mockResolvedValueOnce({ id: "m2", user_id: "other" });
+    await expect(store.delete("m2", "scope_abc")).rejects.toThrow(/Memory not found/);
+    expect(del).toHaveBeenCalledTimes(1);
+
+    get.mockRejectedValueOnce(new Error("Memory not found"));
+    await expect(store.delete("missing", "scope_abc")).rejects.toThrow(
+      /Memory not found/,
+    );
+  });
+});