Personal Agent Ontology

An AI agent that was spawned by another agent to perform delegated work.

• spawned by ^op some ai agent ^c
  
• delegated task ^op some task ^c
  

A role that an agent plays in the context of a conversation or activity.

• obo:BFO_0000023
• Role ^c

An agent that is a human person who interacts with AI systems.

• obo:BFO_0000030
• Person ^c
• foaf:Person
• agent ^c

An event in which an agent receives environmental feedback.

A status transition in which a session's status changes.

A status transition in which a task's status changes.

A prov:Entity that records evidence that a participant has accepted or understood a proposition.

• obo:BFO_0000031
• Entity ^c

A status class whose individuals classify the type of a claim.

A prov:Entity that records a request for additional information to resolve ambiguity.

• obo:BFO_0000031
• Entity ^c

A memory operation that transforms episodic memories into semantic memories.

A trigger that activates on a cron schedule expression.

A memory operation that writes new information into a memory tier.

A process in which memory items are identified and deleted to comply with privacy requirements.

A trigger that activates in response to an external event or webhook.

A memory operation that removes or decays memory items from a memory tier.

A trigger that activates at fixed time intervals.

A generically dependent continuant that provides evidence supporting an agent's intention.

• obo:BFO_0000031
• Entity ^c

A status class whose individuals classify the visibility scope of a memory item.

A status class whose individuals classify where a memory item originates.

A memory tier that stores learned action policies, skills, and behavioral patterns.

A memory operation that strengthens a memory item via repeated access.

A memory operation that reads information from a memory tier.

A generically dependent continuant that specifies a non-negotiable behavioral limit on an agent.

• obo:BFO_0000031
• Entity ^c

A memory tier that stores generalized facts, knowledge, and beliefs extracted from experience.

A service capability that provides a prompt template.

A service capability that provides a data resource for agent access.

A service capability that provides a tool for agent invocation.

A status applicable to sessions indicating whether the session is active, ended, or interrupted.

A memory tier that holds information currently active in the agent's context window.

A status class whose individuals classify authorization outcomes.

An event in which an agent discovers what capabilities an external service exposes.

• discovered capability ^op
• discovery against service ^op

• discovered capability ^op some service capability ^c
  
• discovery against service ^op some external service ^c
  

A status class whose individuals classify the type of communication channel.

A GDC marking a task decision point where human approval may be required.

• obo:BFO_0000031
• Entity ^c

• checkpoint decision ^op
• checkpoint for task ^op

• checkpoint for task ^op some task ^c
  
• checkpoint decision ^op some checkpoint decision ^c
  

A status class whose individuals classify checkpoint decision outcomes.

A prov:Entity that represents the accumulated shared knowledge state between conversation participants.

• obo:BFO_0000031
• Entity ^c

A status class whose individuals classify the communicative purpose of a dialog act.

A status indicating whether a tool invocation complied with applicable permission policies.

A controlled vocabulary for how a schedule handles overlapping executions.

A status class whose individuals classify runtime connection state.

A status class whose individuals classify the type of a content block.

A prov:Entity that represents the pragmatic classification of a turn's communicative intent.

• obo:BFO_0000031
• Entity ^c

A memory item that records a temporally bounded cluster of related events.

• has topic ^op some Concept ^c
  
• stored in ^op some memory tier ^c
  
• stored in ^op only episodic memory ^c
  
• has temporal extent ^op some time:Interval ^c
  

A memory tier that stores time-situated experiences and interaction histories.

A controlled vocabulary for the outcome of a scheduled execution.

A status class whose individuals classify the type of failure causing an error recovery event.

An event in which a participant contributes evidence to the common ground of a conversation.

• provides acceptance evidence ^op
• contributes to common ground ^op

An event in which a hook intercepts and processes a tool invocation.

A status class whose individuals classify the operational state of an integration.

A status class whose individuals classify what happened to an item during compaction.

A memory item that stores structured key-value data (Letta core memory pattern).

• has block key ^dp
• has block value ^dp

A generically dependent continuant that is the textual or structured content of a conversational turn.

• obo:BFO_0000031
• Entity ^c

• has content block ^op
• sent via channel ^op

A generically dependent continuant that identifies an organization or service that hosts and serves foundation models.

• obo:BFO_0000031
• Entity ^c

An agent that is a formal body or group of people.

• obo:BFO_0000030
• agent ^c

A GDC specifying the permission enforcement level under which an agent operates.

A GDC that specifies an agent's configured identity behavior and system prompt.

• obo:BFO_0000031
• Entity ^c

An event representing a failure or degradation occurrence for a service or component.

• linked to recovery ^op
• incident for entity ^op

An event in which an agent generates a new plan after a failure.

An event representing a retry of a failed operation.

An event in which an agent reverts changes made by a failed operation.

A GDC specifying filesystem and network restrictions imposed on an agent.

• obo:BFO_0000031
• Entity ^c

A controlled vocabulary for the lifecycle state of a schedule.

A status class whose individuals classify privacy sensitivity.

A status applicable to tasks indicating progress from pending through completion.

A prov:Entity that groups tool invocations executed in parallel within a single turn.

• obo:BFO_0000031
• Entity ^c

A prov:Entity that represents the typed output artifact produced by a tool invocation.

• obo:BFO_0000031
• Entity ^c

A GDC that serves as a container for audit entries.

• obo:BFO_0000031
• Entity ^c

A generically dependent continuant that is a proposition an agent holds to be true about the world.

• obo:BFO_0000031
• Entity ^c

• held belief ^op
• considers belief ^op

A memory item that represents an agent-held proposition with associated confidence, evidence, and provenance metadata.

• claim type ^op
• has confidence ^dp
• has evidence ^op

• about agent ^op some agent ^c
  
• stored in ^op some memory tier ^c
  

A GDC that specifies a configured communication endpoint through which agent-user dialogue occurs.

• obo:BFO_0000031
• Entity ^c

• sent via channel ^op
• via channel ^op

A GDC that records a data subject's consent for a specific purpose.

• obo:BFO_0000031
• Entity ^c

• consent purpose ^op
• consent subject ^op

A prov:Entity that represents a typed segment of a message's content.

• obo:BFO_0000031
• Entity ^c

• block sequence index ^dp
• has content block type ^op

An event that is a reasoning process in which an agent considers beliefs and desires to produce intentions.

• considers belief ^op
• considers desire ^op
• produces intention ^op

• considers desire ^op some desire ^c
  
• considers belief ^op some belief ^c
  
• produces intention ^op some intention ^c
  

A generically dependent continuant that represents a desired state or outcome an agent works toward.

• obo:BFO_0000031
• Entity ^c

• holds desire ^op
• considers desire ^op

An event in which multiple agents attempt concurrent writes to the same shared memory artifact.

• resolved by policy ^op
• conflict on artifact ^op
• writes by agent ^op

• writes by agent ^op min 2
  
• writes by agent ^op some agent ^c
  
• conflict on artifact ^op some shared memory artifact ^c
  

A generically dependent continuant that is a recorded measurement data point for an operational metric.

• obo:BFO_0000031
• Entity ^c

• has metric value ^dp
• observed on entity ^op
• observes metric ^op

A generically dependent continuant that defines a named metric type for operational monitoring.

• obo:BFO_0000031
• Entity ^c

An individual execution instance of a schedule, recording when it ran, what it produced, and whether it succeeded.

• initiated session ^op
• execution of ^op
• has execution outcome ^op

• execution of ^op some schedule ^c
  
• has temporal extent ^op some time:Interval ^c
  
• has execution outcome ^op some execution outcome ^c
  

A GDC representing the runtime connection between an agent and an external service.

• obo:BFO_0000031
• Entity ^c

• connects to service ^op
• has connection status ^op

• connects to service ^op some external service ^c
  
• has connection status ^op some connection status ^c
  

A prov:Entity that represents a memory artifact accessible to multiple agents for shared read/write.

• obo:BFO_0000031
• Entity ^c

• shared across agents ^op min 2
  
• shared across agents ^op some agent ^c
  

An event that is intentionally caused by an agent to affect the environment or internal state.

A GDC recording an authorization decision for a tool invocation with rationale.

• obo:BFO_0000031
• Entity ^c

• has decision reason ^dp
• audit for invocation ^op
• records decision ^op
• written to audit log ^op

• records decision ^op some authorization decision ^c
  
• written to audit log ^op some audit log ^c
  
• audit for invocation ^op some tool invocation ^c
  

An information artifact recording the fate of an individual item during a compaction event.

• obo:BFO_0000031
• Entity ^c

• fate reason ^dp
• disposition of ^op
• has item fate ^op

• has item fate ^op some item fate ^c
  
• disposition of ^op some Entity ^c
  

A process in which an agent's context window is compressed by summarizing prior turns.

• compacted context of ^op
• has compaction disposition ^op
• compacted item ^op
• produced summary ^op

• compacted item ^op some Entity ^c
  
• in conversation ^op some conversation ^c
  
• produced summary ^op some memory item ^c
  

A GDC representing the finite attention resource of an AI agent session with token capacity and usage tracking.

• obo:BFO_0000031
• Entity ^c

• has token capacity ^dp
• has tokens used ^dp

• compacted context of ^op
• has context window ^op

A GDC representing a configured interceptor that can modify or block tool invocations.

• obo:BFO_0000031
• Entity ^c

A generically dependent continuant that is a configuration artifact for a running model endpoint.

• obo:BFO_0000031
• Entity ^c

• deployed as ^op
• invoked on deployment ^op

An event in which a foundation model is invoked to produce output for a turn.

• has generation config ^op
• invoked on deployment ^op
• model invocation for turn ^op

• has generation config ^op some generation configuration ^c
  
• invoked on deployment ^op some model deployment ^c
  
• model invocation for turn ^op some turn ^c
  

A generically dependent continuant that specifies an ordered sequence of intended actions to achieve a goal.

• achieves goal ^op
• has task ^op

A temporal specification defining when a schedule should fire, expressed as a cron expression, fixed interval, or calendar rule.

• obo:BFO_0000031
• Entity ^c

• has cron expression ^dp
• has interval seconds ^dp

A GDC specifying how long memory items should be retained before deletion.

• obo:BFO_0000031
• Entity ^c

A condition that activates a schedule, such as a time-based cron expression, a fixed interval, or an external event.

• obo:BFO_0000031
• Entity ^c

• cron trigger ^c
• event trigger ^c
• interval trigger ^c

A process consisting of a coherent thread of dialogue between participants that may span multiple sessions.

• in conversation ^op
• part of conversation ^op

A generically dependent continuant that specifies a model family with a name and version.

• obo:BFO_0000031
• Entity ^c

• has model version ^dp
• deployed as ^op
• has model id ^dp
• has provider ^op

• has provider ^op some model provider ^c
  
• deployed as ^op some model deployment ^c
  

A GDC that represents a configured connection to an external service that provides one or more tools.

• obo:BFO_0000031
• Entity ^c

• has endpoint ^dp
• has service name ^dp
• has integration status ^op
• provides tool ^op

• provides tool ^op some tool definition ^c
  
• has integration status ^op some integration status ^c
  

A GDC representing an agent's commitment to execute a plan (BDI model).

• obo:BFO_0000031
• Entity ^c

• derived from goal ^op
• intended by ^op

• justifies intention ^op
• produces intention ^op

• derived from goal ^op some goal ^c
  
• intended by ^op some agent ^c
  

A process that acts on memory items to encode, retrieve, consolidate, or remove them.

• consolidation ^c
• encoding ^c
• forgetting ^c
• rehearsal ^c
• retrieval ^c

A generically dependent continuant that specifies rules governing what actions an agent is permitted or forbidden to perform.

• obo:BFO_0000031
• odrl:Policy

• grants permission ^op
• restricts tool use ^op

• resolved by policy ^op
• governed by policy ^op

• restricts tool use ^op some tool definition ^c
  
• grants permission ^op some odrl:Permission ^c
  
• applies to ^op some agent ^c
  

A generically dependent continuant that specifies the parameter set for controlling model generation.

• obo:BFO_0000031
• Entity ^c

• has max output tokens ^dp
• has prompt version ^dp
• has seed ^dp
• has temperature ^dp
• has top p ^dp

A generically dependent continuant that specifies a desired state an agent works toward.

• obo:BFO_0000031
• Entity ^c

• serves goal ^op
• achieves goal ^op
• derived from goal ^op
• pursues goal ^op

• has status ^op some task status ^c
  
• pursued by ^op some agent ^c
  

A GDC representing a capability that an external service exposes (abstract parent).

• obo:BFO_0000031
• Entity ^c

• discovered capability ^op
• exposes capability ^op

• service prompt capability ^c
• service resource capability ^c
• service tool capability ^c

An agent that is a software system capable of autonomous decision-making and tool use.

• obo:BFO_0000031
• Software Agent ^c
• agent ^c

• enforced by sandbox policy ^op
• has agent id ^dp
• has hook ^op
• has persona ^op
• operates in mode ^op
• uses model ^op

• operates in mode ^op some permission mode ^c
  
• has integration ^op some integration ^c
  
• has hook ^op some hook ^c
  
• has available tool ^op some tool definition ^c
  
• uses model ^op some foundation model ^c
  
• has persona ^op some persona ^c
  
• has external service ^op some external service ^c
  

An event in which an agent initiates recovery after a failure.

• attempted retry ^op
• has attempt count ^dp
• has recovery outcome ^dp
• triggered replan ^op
• triggered rollback ^op
• has failure type ^op
• recovering from ^op

• recovering from ^op some tool invocation ^c
  
• has failure type ^op some failure type ^c
  

A GDC that describes a configured external service with identity and transport metadata.

• obo:BFO_0000031
• Entity ^c

• has service identifier ^dp
• has service transport ^dp
• exposes capability ^op

• connects to service ^op
• discovery against service ^op
• has external service ^op

A process that is a single contribution by one participant in a conversation.

• has dialog act ^op
• has turn index ^dp
• produced by model invocation ^op

• clarifies turn ^op
• grouped in turn ^op
• model invocation for turn ^op

• part of session ^op some session ^c
  
• part of conversation ^op some conversation ^c
  
• has participant ^op some agent ^c
  
• has participant ^op exactly 1
  
• has turn index ^dp exactly 1
  

A generically dependent continuant that defines a layer in the agent's memory architecture with specific storage and access characteristics.

• obo:BFO_0000031
• Entity ^c

• procedural memory ^c
• semantic memory ^c
• working memory ^c
• episodic memory ^c

A named definition that binds a recurrence pattern and trigger to an action specification, governing when an agent should perform automated work.

• obo:BFO_0000031
• Entity ^c

• allows catch up ^dp
• serves goal ^op
• activated by ^op
• has concurrency policy ^op
• has recurrence pattern ^op
• has schedule status ^op
• owned by agent ^op
• schedules action ^op

• owned by agent ^op some agent ^c
  
• has recurrence pattern ^op some recurrence pattern ^c
  
• activated by ^op some trigger ^c
  
• has concurrency policy ^op some concurrency policy ^c
  
• schedules action ^op some action ^c
  
• has schedule status ^op some schedule status ^c
  

A process in which an entity's status changes from one value to another.

• previous transition ^op
• triggered by ^op
• from status ^op
• next transition ^op
• to status ^op
• transition subject ^op

• previous transition ^op
• next transition ^op

• transition subject ^op some Thing ^c
  
• to status ^op some status ^c
  
• from status ^op some status ^c
  

• session status transition ^c
• task status transition ^c

A generically dependent continuant that is a concrete actionable work item within a plan with status and dependencies.

• obo:BFO_0000031
• Entity ^c

• blocked by ^op
• blocks ^op
• part of plan ^op

• blocked by ^op
• blocks ^op
• checkpoint for task ^op
• delegated task ^op
• has task ^op

• part of plan ^op some plan ^c
  
• has status ^op some task status ^c
  

A generically dependent continuant that specifies the interface, capabilities, and constraints of an available tool.

• obo:BFO_0000031
• Entity ^c

• available to agent ^op
• invoked in ^op

• has available tool ^op
• invokes tool ^op
• provides tool ^op
• restricts tool use ^op

A process that is a bounded period of agent-user interaction within a conversation.

• continued from ^op
• has context window ^op
• via channel ^op
• continued by ^op
• has session id ^dp

• continued from ^op
• initiated session ^op
• continued by ^op
• part of session ^op
• in session ^op

• has participant ^op some agent ^c
  
• part of conversation ^op some conversation ^c
  
• has status ^op some session status ^c
  
• has temporal extent ^op some time:Interval ^c
  

A process in which an agent requests execution of a tool by providing inputs and receiving outputs.

• part of invocation group ^op
• governed by policy ^op
• has compliance status ^op
• has input ^op
• has output ^op
• invoked by ^op
• invokes tool ^op
• produced tool result ^op

• audit for invocation ^op
• intercepts invocation ^op
• invoked in ^op
• recovering from ^op

• governed by policy ^op some permission policy ^c
  
• in session ^op some session ^c
  
• has output ^op some Entity ^c
  
• invokes tool ^op some tool definition ^c
  
• has input ^op some Entity ^c
  
• produced tool result ^op some tool result ^c
  
• has compliance status ^op some compliance status ^c
  
• invoked by ^op some agent ^c
  

A generically dependent continuant that is an information artifact persisted in an agent's memory system.

• obo:BFO_0000031
• Entity ^c

• has last access time ^dp
• has memory scope ^op
• has memory source ^op
• is eviction candidate ^dp
• about agent ^op
• governed by retention ^op
• has sensitivity level ^op
• has topic ^op

• operates on ^op
• produced summary ^op
• stores ^op

• governed by retention ^op some retention policy ^c
  
• stored in ^op some memory tier ^c
  
• has sensitivity level ^op some sensitivity level ^c
  
• was attributed to ^op some agent ^c
  
• was generated by ^op some Activity ^c
  
• stored in ^op exactly 1
  

• episode ^c
• memory block ^c
• claim ^c

A class whose individuals represent the current state of an entity.

• obo:BFO_0000031
• Entity ^c

• from status ^op
• to status ^op
• has status ^op

• claim type ^c
• memory scope ^c
• memory source ^c
• session status ^c
• authorization decision ^c
• channel type ^c
• checkpoint decision ^c
• communicative function ^c
• compliance status ^c
• concurrency policy ^c
• connection status ^c
• content block type ^c
• execution outcome ^c
• failure type ^c
• integration status ^c
• item fate ^c
• permission mode ^c
• schedule status ^c
• sensitivity level ^c
• task status ^c

A process that is an occurrence situated in time within the agent system.

• obo:BFO_0000015
• Activity ^c

• recorded in episode ^op
• in conversation ^op
• part of session ^op
• in session ^op
• part of conversation ^op
• has participant ^op

• triggered by ^op
• participates in ^op
• records event ^op

• observation ^c
• erasure event ^c
• capability discovery event ^c
• grounding act ^c
• hook execution ^c
• reliability incident ^c
• replan event ^c
• retry attempt ^c
• rollback event ^c
• deliberation ^c
• memory write conflict ^c
• scheduled execution ^c
• action ^c
• compaction event ^c
• model invocation ^c
• conversation ^c
• memory operation ^c
• error recovery event ^c
• turn ^c
• status transition ^c
• session ^c

An entity that bears responsibility for activities and can act on behalf of itself or others.

• belongs to ^op
• has role ^op
• has service connection ^op
• held belief ^op
• holds desire ^op
• delegated task ^op
• has available tool ^op
• has external service ^op
• has integration ^op
• participates in ^op
• pursues goal ^op
• spawned by ^op

• about agent ^op
• available to agent ^op
• consent subject ^op
• intended by ^op
• invoked by ^op
• owned by agent ^op
• pursued by ^op
• requested by ^op
• spawned by ^op
• applies to ^op
• has member ^op
• performed by ^op
• shared across agents ^op
• writes by agent ^op
• has participant ^op

• human user ^c
• organization ^c
• ai agent ^c

Links an error recovery event to a retry attempt it initiated.

Links an agent to the organization it belongs to.

Links a task to another task that must complete before it can proceed.

Links a claim to its type classifier.

Links a compaction event to the context window that triggered it.

Links a consent record to the entity describing the purpose.

Links a session to the prior session it continues.

Links an AI agent to the sandbox policy that constrains its execution.

Links a compaction event to a disposition record for one of its items.

Links a message to one of its typed content blocks.

Links a session to its context window resource.

Links a turn to a dialog act it performs.

Links a claim to the evidence entities that support it.

Links a memory item to its visibility scope.

Links a memory item to its origination source.

Links an agent to a role it bears in some context.

Links an agent to a runtime connection to an external service.

Links an agent to a belief it holds.

Links an agent to a desire it has.

Links a hook to an execution instance it triggered.

Links a scheduled execution to a session it initiated.

Links a reliability incident to a recovery event that addressed it.

Links a metric observation to the entity it was recorded on.

Links a tool invocation to the parallel invocation group it belongs to.

Links to the preceding status transition for the same subject.

Links a grounding act to evidence of acceptance or understanding.

Links an event to the episode that records it.

Links a memory write conflict to the policy that resolved it.

Links a message to the communication channel it was sent through.

Links a schedule to a goal it serves.

The event that caused this status transition.

Links an error recovery event to the replan event it triggered.

Links an error recovery event to the rollback event it triggered.

Links a session to the communication channel it uses.

Links a memory item to the agent it describes.

Links a plan to the goal it is designed to achieve.

Links a schedule to the trigger that activates it.

Links an audit entry to the tool invocation it documents.

Links a tool definition to an agent that may invoke it.

Links a task to another task that depends on its completion.

Links a checkpoint to the human decision recorded for it.

Links a checkpoint to the task it gates.

Links a clarification request to the turn it seeks to clarify.

Links a compaction event to an item that was in scope for compaction.

Links a memory write conflict to the shared artifact in contention.

Links a service connection to the external service it connects to.

Links a consent record to the data subject agent.

Links a deliberation to a belief it considers.

Links a deliberation to a desire it considers.

Links a session to a subsequent session that continues its work.

Links a grounding act to the common ground it updates.

Links a sub-agent to the task it was spawned to perform.

Links a foundation model to one of its deployments.

Links an intention to the goal it was derived from.

Links a capability discovery event to a capability it discovered.

Links a capability discovery event to the service it queried.

Links a compaction disposition to the item it describes.

Links a scheduled execution to the schedule it instantiates.

Links an external service to a capability it exposes.

The status value before the transition.

Links a tool invocation to the permission policy that governed it.