a2a 0.6.0

The push notification config view answers a config only under the tenant it was created under, and a2a-testkit now reads events and task views from what the endpoint answered.

Breaking

• The a2a.tasks.TaskPushNotificationConfigs view takes a tenant parameter; TaskPushNotificationConfigsQuery::task_push_notification_configs takes (task_id, tenant).

Changed

• a2a-testkit derives TaskCreated, MessageStreamResponse, TaskStatusUpdated and TaskArtifactUpdated from answers and streams, and answers AllTasks and Tasks with the scenario's tasks. Against a2a-server with an idle agent it now gives 20 passed, 0 failed.
• ESS pin 0.75.0 -> 0.76.0; generated crate, projections and conformance suite unchanged.

Full notes: CHANGELOG

0.5.0

a2a 0.5.0 adds a2a-client, a Rust client for A2A's HTTP+JSON binding, a2a-conformance, which runs the ESS conformance suite against a2a-server in task check, and a2a-testkit, which checks any A2A endpoint from outside.

Breaking

• None.

Changed

• New crate crates/a2a-client: one typed method per operation, typed errors and streams, http:// only; the bearer token is never sent with the public card.
• New crate crates/a2a-conformance: task conform, now part of task check, runs the suite against a2a-server in process: 169 of 182 pass, 13 unsupported with listed reasons.
• New crate crates/a2a-testkit: a2a-testkit run --url <base> --suite <suite.json> with --results and --bearer-file, plus assertion helpers that answer a Mismatch instead of panicking.
• a2a-server exports InProcess, Obligations and ServerPorts, a trusted in-process harness entry.
• Five authored scenarios under ess/scenarios/ for tenant scoping, status filters, history length and paging.
• Taskfile.yml no longer sets a shared CARGO_TARGET_DIR; each checkout builds into its own target/.

CHANGELOG

0.4.0

a2a 0.4.0 adds a2a-server, a Rust server for A2A's HTTP+JSON binding built on the generated crate, with the a2a-server echo agent.

Breaking

• None.

Changed

• New crate crates/a2a-server: every upstream HTTP+JSON route, server-sent event streams, and tenant isolation of every task operation.
• a2a-server bounds connections, request time, followers, tasks, history and push configs; a request over a bound is answered 429 RESOURCE_EXHAUSTED.
• GET /extendedAgentCard needs the bearer token from --extended-card-token-file.
• The specification adds the task's tenant, the ResourceExhausted error and its limit outcomes; ess/http.yaml ignores unknown query fields.
• The generated crate is synthesized with the HTTP binding; ESS stays at 0.75.0.

CHANGELOG

0.3.0

A2A's HTTP+JSON paths as an ess-http/1 binding (9 of 22 upstream routes equal, the rest named with reasons), and a documentation site at https://beyond10x.github.io/a2a/ with reference pages and downloads.

Breaking

• None.

Changed

• Added ess/http.yaml and ess/http-unmapped.tsv, projected to generated/openapi-http/ and held to the upstream OpenAPI by task check.
• Added the documentation site (website/, Docusaurus on @beyond10x/docs-system 0.11.0) and crates/a2a-docs, which generates and drift-checks its reference pages and downloads.
• Added the release asset a2a-0.3.0-http.openapi.yaml; the specification bundle carries generated/openapi-http/.

Full list: CHANGELOG.md

0.2.0

The ESS specification now covers the A2A JSON-RPC method names and error codes and both response streams.
It also resolves 6 of the 12 UNMAPPED markers from a2a.proto and the A2A v1.0.1 specification.

Breaking

• Push notification configs are scoped to their parent task. Deleting a config of an unknown task now answers TaskNotFound.
• Views carry grants (section 13.1): Tasks and TaskPushNotificationConfigs go to the Client, PushNotificationConfigs and AllTasks to the Agent.
• SendMessage blocking follows SendMessageConfiguration.blocking from a2a.proto.

Changed

• Each A2A error carries its JSON-RPC code (-32001 to -32009), including the new InvalidAgentResponse (-32006).
• MessageStreamResponse and TaskSubscriptionResponse events, published on the message:stream and tasks:subscribe AsyncAPI channels.
• ListTaskPushNotificationConfigs, UpdateArtifact, and the ContextNotAccepted, VersionNotSupported and ExtensionSupportRequired errors.
• Refusals decided by the request alone now answer before the task lookup.
• TaskSnapshot.context_id and the ListTaskPushNotificationConfigs response fields are optional, as in a2a.proto.
• The release workflow uploads its assets to this bot-created Release.

Full entry: https://github.com/beyond10x/a2a/blob/0.2.0/CHANGELOG.md

0.1.0

ESS specification of A2A v1.0.1 and the artifacts generated from it.

Added

• ESS specification of A2A v1.0.1 in ess/: domains a2a.tasks and a2a.discovery, 15 commands,
  4 events, 3 views and one component a2a-agent.
• Upstream a2a.proto pinned at v1.0.1 and an OpenAPI 3.0 document derived from it.
• OpenAPI, AsyncAPI and JSON Schema projections and a synthesized Rust crate under generated/,
  held to ess/ by task check.
• Release assets: a2a.proto, both OpenAPI documents, the AsyncAPI document, the JSON Schema
  archive and the specification bundle, with SHA256SUMS.

Full entry: https://github.com/beyond10x/a2a/blob/0.1.0/CHANGELOG.md