## Update a memory

`$ ant beta:memory-stores:memories update`

**post** `/v1/memory_stores/{memory_store_id}/memories/{memory_id}`

Update a memory

### Parameters

- `--memory-store-id: string`

  Path param: Path parameter memory_store_id

- `--memory-id: string`

  Path param: Path parameter memory_id

- `--view: optional "basic" or "full"`

  Query param: Query parameter for view

- `--content: optional string`

  Body param: New UTF-8 text content for the memory. Maximum 100 kB (102,400 bytes). Omit to leave the content unchanged (e.g., for a rename-only update).

- `--path: optional string`

  Body param: New path for the memory (a rename). Must start with `/`, contain at least one non-empty segment, and be at most 1,024 bytes. Must not contain empty segments, `.` or `..` segments, control or format characters, and must be NFC-normalized. Paths are case-sensitive. The memory's `id` is preserved across renames. Omit to leave the path unchanged.

- `--precondition: optional object { type, content_sha256 }`

  Body param: Optimistic-concurrency precondition: the update applies only if the memory's stored `content_sha256` equals the supplied value. On mismatch, the request returns `memory_precondition_failed_error` (HTTP 409); re-read the memory and retry against the fresh state. If the precondition fails but the stored state already exactly matches the requested `content` and `path`, the server returns 200 instead of 409.

- `--beta: optional array of AnthropicBeta`

  Header param: Optional header to specify the beta version(s) you want to use.

### Returns

- `beta_managed_agents_memory: object { id, content_sha256, content_size_bytes, 7 more }`

  A `memory` object: a single text document at a hierarchical path inside a memory store. The `content` field is populated when `view=full` and `null` when `view=basic`; the `content_size_bytes` and `content_sha256` fields are always populated so sync clients can diff without fetching content. Memories are addressed by their `mem_...` ID; the path is the create key and can be changed via update.

  - `id: string`

    Unique identifier for this memory (a `mem_...` value). Stable across renames; use this ID, not the path, to read, update, or delete the memory.

  - `content_sha256: string`

    Lowercase hex SHA-256 digest of the UTF-8 `content` bytes (64 characters). The server applies no normalization, so clients can compute the same hash locally for staleness checks and as the value for a `content_sha256` precondition on update. Always populated, regardless of `view`.

  - `content_size_bytes: number`

    Size of `content` in bytes (the UTF-8 plaintext length). Always populated, regardless of `view`.

  - `created_at: string`

    A timestamp in RFC 3339 format

  - `memory_store_id: string`

    ID of the memory store this memory belongs to (a `memstore_...` value).

  - `memory_version_id: string`

    ID of the `memory_version` representing this memory's current content (a `memver_...` value). This is the authoritative head pointer; `memory_version` objects do not carry an `is_latest` flag, so compare against this field instead. Enumerate the full history via [List memory versions](/docs/en/api/beta/memory_stores/memory_versions/list).

  - `path: string`

    Hierarchical path of the memory within the store, e.g. `/projects/foo/notes.md`. Always starts with `/`. Paths are case-sensitive and unique within a store. Maximum 1,024 bytes.

  - `type: "memory"`

    - `"memory"`

  - `updated_at: string`

    A timestamp in RFC 3339 format

  - `content: optional string`

    The memory's UTF-8 text content. Populated when `view=full`; `null` when `view=basic`. Maximum 100 kB (102,400 bytes).

### Example

```cli
ant beta:memory-stores:memories update \
  --api-key my-anthropic-api-key \
  --memory-store-id memory_store_id \
  --memory-id memory_id
```

#### Response

```json
{
  "id": "id",
  "content_sha256": "content_sha256",
  "content_size_bytes": 0,
  "created_at": "2019-12-27T18:11:19.117Z",
  "memory_store_id": "memory_store_id",
  "memory_version_id": "memory_version_id",
  "path": "path",
  "type": "memory",
  "updated_at": "2019-12-27T18:11:19.117Z",
  "content": "content"
}
```
