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.
Attribution for a write made directly via the public API (outside of any session).
ID of the API key that performed the write. This identifies the key, not the secret.
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 are not deleted with the memory; each version is retained for at least the version retention period after it was written, unless the store itself 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.
The kind of mutation a memory_version records. Every non-no-op mutation to a memory appends exactly one version row with one of these values.
Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
ID of the service account that performed the write (a svac_... value).
Attribution for a write made by an agent during a session, through the mounted filesystem at /mnt/memory/.
ID of the session that performed the write (a sesn_... value). Look up the session via Retrieve a session for further provenance.
Attribution for a write made by a human user through the Anthropic Console.
ID of the user who performed the write (a user_... value).