types.h File Reference

Core data types for the Agent-to-Agent (A2A) protocol. More...

#include <neograph/api.h>
#include <neograph/json.h>
#include <optional>
#include <string>
#include <vector>

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Classes
struct	neograph::a2a::AgentCard
	Subset of AgentCard required to interact (spec §5.5). More...
struct	neograph::a2a::Artifact
	Generated output (spec §6.7). More...
struct	neograph::a2a::Message
	A single conversational turn (spec §6.4). More...
struct	neograph::a2a::MessageSendConfiguration
	Optional knobs for message/send (spec §7.2). More...
struct	neograph::a2a::MessageSendParams
	Params object for message/send and message/stream. More...
struct	neograph::a2a::Part
	One content fragment of a Message or Artifact. More...
struct	neograph::a2a::StreamEvent
	Tagged union over the two streaming event types + the terminal Task message. More...
struct	neograph::a2a::Task
	A unit of work tracked by the agent (spec §6.1). More...
struct	neograph::a2a::TaskStatus
	Status snapshot of a running Task (spec §6.5). More...
struct	neograph::a2a::TaskStatusUpdateEvent
	SSE event emitted by message/stream and tasks/resubscribe while a Task is running. More...

Enumerations
enum class	neograph::a2a::Role
	Message role (spec §6.4).
enum class	neograph::a2a::TaskState
	TaskState — exact strings from spec §6.3 (kebab-case).

Functions
NEOGRAPH_API StreamEvent	neograph::a2a::parse_stream_event (const json &j)
	Parse a single SSE data: {...} JSON object into the right variant.

Detailed Description

Core data types for the Agent-to-Agent (A2A) protocol.

Mirrors the canonical proto / JSON schema at https://github.com/a2aproject/A2A (specification/a2a.proto).

Only the surface needed by the client is modelled here. The wire format is JSON; structs round-trip through nlohmann::json via to_json/from_json ADL hooks defined in src/a2a/types.cpp.

Definition in file types.h.

Function Documentation

parse_stream_event()

NEOGRAPH_API StreamEvent neograph::a2a::parse_stream_event

(

const json &

j

)

Parse a single SSE data: {...} JSON object into the right variant.

Discriminator priority: kind="status-update" | "artifact-update" | "task". Anything else falls back to Task.

References neograph::a2a::parse_stream_event().

Referenced by neograph::a2a::parse_stream_event().