Source Intelligence
Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 0/5 agents 427 findings $12.75 so far

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

One change

Memory Versions

api/beta/memory_stores/memory_versions

first seen The page's own history The capture it came from

Nearest release: v2.1.245, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

api/beta/memory_stores/memory_versions Changed · +123 / -106 lines

### Path parameters ### Query parameters ### Headers #### Response (200) ### Path parameters ### Query parameters ### Headers #### Response (200) ### Path parameters ### Headers #### Response (200) ## Domain types ### Path Parameters ### Query Parameters ### Header Parameters #### Response ### Path Parameters ### Query Parameters ### Header Parameters #### Response ### Path Parameters ### Header Parameters #### Response ## Domain Types

from line 1
----
-title: Memory Versions
-url: https://platform.claude.com/docs/en/api/beta/memory_stores/memory_versions
----
-
 # Memory Versions
 
 ## List memory versions
 
-**get** `/v1/memory_stores/{memory_store_id}/memory_versions`
+**GET** `/v1/memory_stores/{memory_store_id}/memory_versions`
 
 List memory versions
 
-### Path Parameters
+### Path parameters
 
 - `memory_store_id: string`
 
-### Query Parameters
+### Query parameters
 
 - `api_key_id: optional string`
 
from line 20
 
   Return versions created at or after this time (inclusive).
 
+  format: date-time
+
 - `"created_at[lte]": optional string`
 
   Return versions created at or before this time (inclusive).
 
+  format: date-time
+
 - `limit: optional number`
 
   Query parameter for limit
 
+  format: int32
+
 - `memory_id: optional string`
 
   Query parameter for memory_id
from line 68
 
   - `"full"`
 
-### Header Parameters
+### Headers
 
 - `"anthropic-beta": optional array of AnthropicBeta`
 
from line 160
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `memory_id: string`
 
     ID of the memory this version snapshots (a `mem_...` value). Remains valid after the memory is deleted; pass it as `memory_id` to [List memory versions](/docs/en/api/beta/memory_stores/memory_versions/list) to retrieve the full lineage including the `deleted` row.
from line 182
 
   - `type: "memory_version"`
 
-    - `"memory_version"`
-
   - `content: optional string or null`
 
     The memory's UTF-8 text content as of this version. `null` when `view=basic`, when `operation` is `deleted`, or when `redacted_at` is set.
from line 194
 
     Size of `content` in bytes as of this version. `null` when `redacted_at` is set or `operation` is `deleted`. Populated regardless of `view` otherwise.
 
+    format: int32
+
   - `created_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
 
-    - `BetaManagedAgentsSessionActor object { session_id, type }`
+    - `BetaManagedAgentsSessionActor object`
 
       Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
 
from line 208
 
         ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
 
+        minLength: 1
+
       - `type: "session_actor"`
 
-        - `"session_actor"`
+    - `BetaManagedAgentsAPIActor object`
 
-    - `BetaManagedAgentsAPIActor object { api_key_id, type }`
-
       Attribution for a write made directly via the public API (outside of any session).
 
       - `api_key_id: string`
from line 220
 
         ID of the API key that performed the write. This identifies the key, not the secret.
 
+        minLength: 1
+
       - `type: "api_actor"`
 
-        - `"api_actor"`
+    - `BetaManagedAgentsUserActor object`
 
-    - `BetaManagedAgentsUserActor object { type, user_id }`
-
       Attribution for a write made by a human user through the Anthropic Console.
 
       - `type: "user_actor"`
 
-        - `"user_actor"`
-
       - `user_id: string`
 
         ID of the user who performed the write (a `user_...` value).
 
-    - `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
+        minLength: 1
 
+    - `BetaManagedAgentsServiceAccountActor object`
+
       Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
 
       - `service_account_id: string`
from line 244
 
         ID of the service account that performed the write (a `svac_...` value).
 
+        minLength: 1
+
       - `type: "service_account_actor"`
 
-        - `"service_account_actor"`
-
   - `path: optional string or null`
 
     The memory's path at the time of this write. `null` if and only if `redacted_at` is set.
from line 256
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `redacted_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
from line 268
 
 ### Example
 
-```http
+```bash
 curl https://api.anthropic.com/v1/memory_stores/$MEMORY_STORE_ID/memory_versions \
     -H 'anthropic-version: 2023-06-01' \
     -H 'anthropic-beta: agent-memory-2026-07-22' \
from line 275
     -H "X-Api-Key: $ANTHROPIC_API_KEY"
 ```
 
-#### Response
+#### Response (200)
 
 ```json
 {
from line 308
 
 ## Retrieve a memory version
 
-**get** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}`
+**GET** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}`
 
 Retrieve a memory version
 
-### Path Parameters
+### Path parameters
 
 - `memory_store_id: string`
 
 - `memory_version_id: string`
 
-### Query Parameters
+### Query parameters
 
 - `view: optional BetaManagedAgentsMemoryView`
 
from line 328
 
   - `"full"`
 
-### Header Parameters
+### Headers
 
 - `"anthropic-beta": optional array of AnthropicBeta`
 
from line 408
 
 ### Returns
 
-- `BetaManagedAgentsMemoryVersion object { id, created_at, memory_id, 10 more }`
+- `BetaManagedAgentsMemoryVersion object`
 
   A `memory_version` object: one immutable, attributed row in a memory's append-only history. Every non-no-op mutation to a memory produces a new version. Versions belong to the store (not the individual memory) and persist after the memory is deleted. Retrieving a redacted version returns 200 with `content`, `path`, `content_size_bytes`, and `content_sha256` set to `null`; branch on `redacted_at`, not HTTP status.
 
from line 420
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `memory_id: string`
 
     ID of the memory this version snapshots (a `mem_...` value). Remains valid after the memory is deleted; pass it as `memory_id` to [List memory versions](/docs/en/api/beta/memory_stores/memory_versions/list) to retrieve the full lineage including the `deleted` row.
from line 442
 
   - `type: "memory_version"`
 
-    - `"memory_version"`
-
   - `content: optional string or null`
 
     The memory's UTF-8 text content as of this version. `null` when `view=basic`, when `operation` is `deleted`, or when `redacted_at` is set.
from line 454
 
     Size of `content` in bytes as of this version. `null` when `redacted_at` is set or `operation` is `deleted`. Populated regardless of `view` otherwise.
 
+    format: int32
+
   - `created_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
 
-    - `BetaManagedAgentsSessionActor object { session_id, type }`
+    - `BetaManagedAgentsSessionActor object`
 
       Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
 
from line 468
 
         ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
 
+        minLength: 1
+
       - `type: "session_actor"`
 
-        - `"session_actor"`
+    - `BetaManagedAgentsAPIActor object`
 
-    - `BetaManagedAgentsAPIActor object { api_key_id, type }`
-
       Attribution for a write made directly via the public API (outside of any session).
 
       - `api_key_id: string`
from line 480
 
         ID of the API key that performed the write. This identifies the key, not the secret.
 
+        minLength: 1
+
       - `type: "api_actor"`
 
-        - `"api_actor"`
+    - `BetaManagedAgentsUserActor object`
 
-    - `BetaManagedAgentsUserActor object { type, user_id }`
-
       Attribution for a write made by a human user through the Anthropic Console.
 
       - `type: "user_actor"`
 
-        - `"user_actor"`
-
       - `user_id: string`
 
         ID of the user who performed the write (a `user_...` value).
 
-    - `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
+        minLength: 1
 
+    - `BetaManagedAgentsServiceAccountActor object`
+
       Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
 
       - `service_account_id: string`
from line 504
 
         ID of the service account that performed the write (a `svac_...` value).
 
+        minLength: 1
+
       - `type: "service_account_actor"`
 
-        - `"service_account_actor"`
-
   - `path: optional string or null`
 
     The memory's path at the time of this write. `null` if and only if `redacted_at` is set.
from line 516
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `redacted_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
from line 524
 
 ### Example
 
-```http
+```bash
 curl https://api.anthropic.com/v1/memory_stores/$MEMORY_STORE_ID/memory_versions/$MEMORY_VERSION_ID \
     -H 'anthropic-version: 2023-06-01' \
     -H 'anthropic-beta: agent-memory-2026-07-22' \
from line 531
     -H "X-Api-Key: $ANTHROPIC_API_KEY"
 ```
 
-#### Response
+#### Response (200)
 
 ```json
 {
from line 559
 
 ## Redact a memory version
 
-**post** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}/redact`
+**POST** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}/redact`
 
 Redact a memory version
 
-### Path Parameters
+### Path parameters
 
 - `memory_store_id: string`
 
 - `memory_version_id: string`
 
-### Header Parameters
+### Headers
 
 - `"anthropic-beta": optional array of AnthropicBeta`
 
from line 649
 
 ### Returns
 
-- `BetaManagedAgentsMemoryVersion object { id, created_at, memory_id, 10 more }`
+- `BetaManagedAgentsMemoryVersion object`
 
   A `memory_version` object: one immutable, attributed row in a memory's append-only history. Every non-no-op mutation to a memory produces a new version. Versions belong to the store (not the individual memory) and persist after the memory is deleted. Retrieving a redacted version returns 200 with `content`, `path`, `content_size_bytes`, and `content_sha256` set to `null`; branch on `redacted_at`, not HTTP status.
 
from line 661
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `memory_id: string`
 
     ID of the memory this version snapshots (a `mem_...` value). Remains valid after the memory is deleted; pass it as `memory_id` to [List memory versions](/docs/en/api/beta/memory_stores/memory_versions/list) to retrieve the full lineage including the `deleted` row.
from line 683
 
   - `type: "memory_version"`
 
-    - `"memory_version"`
-
   - `content: optional string or null`
 
     The memory's UTF-8 text content as of this version. `null` when `view=basic`, when `operation` is `deleted`, or when `redacted_at` is set.
from line 695
 
     Size of `content` in bytes as of this version. `null` when `redacted_at` is set or `operation` is `deleted`. Populated regardless of `view` otherwise.
 
+    format: int32
+
   - `created_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
 
-    - `BetaManagedAgentsSessionActor object { session_id, type }`
+    - `BetaManagedAgentsSessionActor object`
 
       Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
 
from line 709
 
         ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
 
+        minLength: 1
+
       - `type: "session_actor"`
 
-        - `"session_actor"`
+    - `BetaManagedAgentsAPIActor object`
 
-    - `BetaManagedAgentsAPIActor object { api_key_id, type }`
-
       Attribution for a write made directly via the public API (outside of any session).
 
       - `api_key_id: string`
from line 721
 
         ID of the API key that performed the write. This identifies the key, not the secret.
 
+        minLength: 1
+
       - `type: "api_actor"`
 
-        - `"api_actor"`
+    - `BetaManagedAgentsUserActor object`
 
-    - `BetaManagedAgentsUserActor object { type, user_id }`
-
       Attribution for a write made by a human user through the Anthropic Console.
 
       - `type: "user_actor"`
 
-        - `"user_actor"`
-
       - `user_id: string`
 
         ID of the user who performed the write (a `user_...` value).
 
-    - `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
+        minLength: 1
 
+    - `BetaManagedAgentsServiceAccountActor object`
+
       Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
 
       - `service_account_id: string`
from line 745
 
         ID of the service account that performed the write (a `svac_...` value).
 
+        minLength: 1
+
       - `type: "service_account_actor"`
 
-        - `"service_account_actor"`
-
   - `path: optional string or null`
 
     The memory's path at the time of this write. `null` if and only if `redacted_at` is set.
from line 757
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `redacted_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
from line 765
 
 ### Example
 
-```http
+```bash
 curl https://api.anthropic.com/v1/memory_stores/$MEMORY_STORE_ID/memory_versions/$MEMORY_VERSION_ID/redact \
     -X POST \
     -H 'anthropic-version: 2023-06-01' \
from line 773
     -H "X-Api-Key: $ANTHROPIC_API_KEY"
 ```
 
-#### Response
+#### Response (200)
 
 ```json
 {
from line 799
 }
 ```
 
-## Domain Types
+## Domain types
 
 ### Beta Managed Agents Actor
 
from line 807
 
   Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
 
-  - `BetaManagedAgentsSessionActor object { session_id, type }`
+  - `BetaManagedAgentsSessionActor object`
 
     Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
 
from line 815
 
       ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
 
+      minLength: 1
+
     - `type: "session_actor"`
 
-      - `"session_actor"`
+  - `BetaManagedAgentsAPIActor object`
 
-  - `BetaManagedAgentsAPIActor object { api_key_id, type }`
-
     Attribution for a write made directly via the public API (outside of any session).
 
     - `api_key_id: string`
from line 827
 
       ID of the API key that performed the write. This identifies the key, not the secret.
 
+      minLength: 1
+
     - `type: "api_actor"`
 
-      - `"api_actor"`
+  - `BetaManagedAgentsUserActor object`
 
-  - `BetaManagedAgentsUserActor object { type, user_id }`
-
     Attribution for a write made by a human user through the Anthropic Console.
 
     - `type: "user_actor"`
 
-      - `"user_actor"`
-
     - `user_id: string`
 
       ID of the user who performed the write (a `user_...` value).
 
-  - `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
+      minLength: 1
 
+  - `BetaManagedAgentsServiceAccountActor object`
+
     Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
 
     - `service_account_id: string`
from line 851
 
       ID of the service account that performed the write (a `svac_...` value).
 
+      minLength: 1
+
     - `type: "service_account_actor"`
 
-      - `"service_account_actor"`
-
 ### Beta Managed Agents API Actor
 
-- `BetaManagedAgentsAPIActor object { api_key_id, type }`
+- `BetaManagedAgentsAPIActor object`
 
   Attribution for a write made directly via the public API (outside of any session).
 
from line 865
 
     ID of the API key that performed the write. This identifies the key, not the secret.
 
+    minLength: 1
+
   - `type: "api_actor"`
 
-    - `"api_actor"`
-
 ### Beta Managed Agents Memory Version
 
-- `BetaManagedAgentsMemoryVersion object { id, created_at, memory_id, 10 more }`
+- `BetaManagedAgentsMemoryVersion object`
 
   A `memory_version` object: one immutable, attributed row in a memory's append-only history. Every non-no-op mutation to a memory produces a new version. Versions belong to the store (not the individual memory) and persist after the memory is deleted. Retrieving a redacted version returns 200 with `content`, `path`, `content_size_bytes`, and `content_sha256` set to `null`; branch on `redacted_at`, not HTTP status.
 
from line 883
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `memory_id: string`
 
     ID of the memory this version snapshots (a `mem_...` value). Remains valid after the memory is deleted; pass it as `memory_id` to [List memory versions](/docs/en/api/beta/memory_stores/memory_versions/list) to retrieve the full lineage including the `deleted` row.
from line 905
 
   - `type: "memory_version"`
 
-    - `"memory_version"`
-
   - `content: optional string or null`
 
     The memory's UTF-8 text content as of this version. `null` when `view=basic`, when `operation` is `deleted`, or when `redacted_at` is set.
from line 917
 
     Size of `content` in bytes as of this version. `null` when `redacted_at` is set or `operation` is `deleted`. Populated regardless of `view` otherwise.
 
+    format: int32
+
   - `created_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
 
-    - `BetaManagedAgentsSessionActor object { session_id, type }`
+    - `BetaManagedAgentsSessionActor object`
 
       Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
 
from line 931
 
         ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
 
+        minLength: 1
+
       - `type: "session_actor"`
 
-        - `"session_actor"`
+    - `BetaManagedAgentsAPIActor object`
 
-    - `BetaManagedAgentsAPIActor object { api_key_id, type }`
-
       Attribution for a write made directly via the public API (outside of any session).
 
       - `api_key_id: string`
from line 943
 
         ID of the API key that performed the write. This identifies the key, not the secret.
 
+        minLength: 1
+
       - `type: "api_actor"`
 
-        - `"api_actor"`
+    - `BetaManagedAgentsUserActor object`
 
-    - `BetaManagedAgentsUserActor object { type, user_id }`
-
       Attribution for a write made by a human user through the Anthropic Console.
 
       - `type: "user_actor"`
 
-        - `"user_actor"`
-
       - `user_id: string`
 
         ID of the user who performed the write (a `user_...` value).
 
-    - `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
+        minLength: 1
 
+    - `BetaManagedAgentsServiceAccountActor object`
+
       Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
 
       - `service_account_id: string`
from line 967
 
         ID of the service account that performed the write (a `svac_...` value).
 
+        minLength: 1
+
       - `type: "service_account_actor"`
 
-        - `"service_account_actor"`
-
   - `path: optional string or null`
 
     The memory's path at the time of this write. `null` if and only if `redacted_at` is set.
from line 979
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `redacted_by: optional BetaManagedAgentsActor`
 
     Identifies who performed a write or redact operation. Captured at write time on the `memory_version` row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the [Sessions API](/docs/en/api/sessions-retrieve).
from line 999
 
 ### Beta Managed Agents Service Account Actor
 
-- `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
+- `BetaManagedAgentsServiceAccountActor object`
 
   Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
 
from line 1007
 
     ID of the service account that performed the write (a `svac_...` value).
 
+    minLength: 1
+
   - `type: "service_account_actor"`
 
-    - `"service_account_actor"`
-
 ### Beta Managed Agents Session Actor
 
-- `BetaManagedAgentsSessionActor object { session_id, type }`
+- `BetaManagedAgentsSessionActor object`
 
   Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
 
from line 1021
 
     ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
 
+    minLength: 1
+
   - `type: "session_actor"`
 
-    - `"session_actor"`
-
 ### Beta Managed Agents User Actor
 
-- `BetaManagedAgentsUserActor object { type, user_id }`
+- `BetaManagedAgentsUserActor object`
 
   Attribution for a write made by a human user through the Anthropic Console.
 
   - `type: "user_actor"`
 
-    - `"user_actor"`
-
   - `user_id: string`
 
     ID of the user who performed the write (a `user_...` value).
+
+    minLength: 1