Glossary

• runtime: Execution authority that owns agent facts and control semantics.
• session: Durable user-visible work container.
• thread: Ordered execution context inside a session.
• turn: One submitted input cycle.
• task: Durable objective with lifecycle, attempts, relationships, progress, acceptance, and recovery state.
• run / attempt: One execution attempt for a task.
• step: Ordered runtime item in a turn, task, or run.
• tool_call: One invocation of a tool or connector.
• action_request: Pending human or policy decision.
• subagent: Child runtime context delegated by a parent runtime.
• read model: Compact view derived from runtime facts for inspection.
• snapshot: Durable state used for recovery and hydration.
• evidence pack: Exported facts for review, replay, verification, or audit.
• provider adapter: Layer that maps provider-native streams to runtime events.
• capability surface: Tools and actions available under current policy and context.
• compaction boundary: Runtime checkpoint where context was summarized or rewritten.