ContextSnapshot

Restore model context and preserve immutable original messages. See the guide.

class zett_agent.extensions.persistence.ContextSnapshot(*, id, session_id, version, compacted_message, compacted_through_sequence, created_at, updated_at)

One immutable checkpoint representing a compacted Raw Log prefix.

Create a new model by parsing and validating input data from keyword arguments.

Raises [ValidationError][pydantic_core.ValidationError] if the input data cannot be validated to form a valid model.

self is explicitly positional-only to allow self as a field name.

Parameters:

• id (str)

• session_id (str)

• version (int)

• compacted_message (CompactedMessage)

• compacted_through_sequence (int)

• created_at (datetime)

• updated_at (datetime)

Fields

id (required)

Stable snapshot identifier

session_id (required)

Session whose context was compacted

version (required)

Monotonically increasing snapshot version

compacted_message (required)

Summary replacing the compacted Raw Log prefix

compacted_through_sequence (required)

Last Raw Log sequence represented by the summary

created_at (required)

UTC snapshot creation time

updated_at (required)

UTC modification time; equal to creation time while immutable