All 21 articles, sorted alphabetically
A2A Agent Card Architecture in Depth
A 2500-word walkthrough of A2A agent card architecture: well-known URL, capabilities, skills, endpoints, auth, versioning, signing, registry.
Read article →A2A artifact exchange architecture
Deep-dive on A2A artifacts: the artifact/part object model, TextPart/FilePart/DataPart types, TaskArtifactUpdate streaming with append and lastChunk, …
Read article →A2A authentication and authorization -- agent identity, delegation, cross-org trust
Deep-dive on A2A auth: agent identity and verifiable credentials, OAuth/OIDC token authentication, scopes and claims, delegation for agents acting on …
Read article →A2A backpressure architecture
Deep-dive on backpressure in Agent2Agent systems: bounded admission windows, credit-based flow control, 429/Retry-After signals, SSE pull cadence and …
Read article →A2A circuit breaker architecture
Deep-dive on circuit breaking for Agent-to-Agent systems: the per-peer closed/open/half-open state machine driven by a rolling failure rate, failing f…
Read article →Dead-letter handling architecture
Deep-dive on dead-letter handling for agent-to-agent task delegation: how a task that cannot be delivered or completed after bounded retries is parked…
Read article →A2A error handling -- failures across agent boundaries
Deep-dive on A2A error handling: error types and structured errors (code/message/data), task failure states, retries and idempotency, timeouts, partia…
Read article →A2A idempotency architecture
Deep-dive on idempotency in agent-to-agent systems: client-generated task IDs as the dedup contract, atomic registration and replay, distinguishing re…
Read article →A2A load shedding architecture
Deep-dive on load shedding in agent-to-agent systems: why overload has a cliff and propagates as metastable failure, admission control with priority c…
Read article →A2A Multi-Tenancy: Architecture Deep-Dive
How tenant isolation survives agent delegation chains — signed identity at the edge, scoped token exchange per hop, tenant-keyed state and caches, per…
Read article →Agent-to-Agent Protocol Architecture in Depth
A 2500-word walkthrough of A2A protocol architecture: agent cards, discovery, auth, task messages, streaming updates, signed bus, policy, and observab…
Read article →A2A push notification architecture
Deep-dive on A2A push notifications: pushNotificationConfig registration and SSRF-safe URL vetting, the notifier queue and JWT signing, webhook receiv…
Read article →A2A rate limiting -- protecting agents from overload and abuse
Deep-dive on A2A rate limiting: the overload need, per-agent limits, the token bucket (rate + burst), 429 + Retry-After, distributed limiting (shared …
Read article →A2A task state -- the lifecycle of a delegated task
Deep-dive on A2A task state: the delegated task as a stateful entity, the state machine (submitted/working/terminal), terminal states (completed/faile…
Read article →A2A streaming architecture
Deep-dive on A2A's long-running task machinery: message/stream SSE subscriptions, the task state machine, incremental artifact updates, input-req…
Read article →A2A task cancellation architecture
Deep-dive on cancellation in the Agent-to-Agent protocol: tasks/cancel as a cooperative signal, the cancel token checked at safe points, saga-style co…
Read article →A2A timeout handling
Deep-dive on timeout handling in agent-to-agent systems: putting a deadline on every delegated call, propagating a shrinking budget down the chain, wa…
Read article →Agent-to-agent distributed tracing architecture
Deep-dive on distributed tracing for multi-agent systems: root spans, W3C Trace Context propagation across A2A hops, nesting tool and LLM calls as chi…
Read article →A2A protocol versioning
Deep-dive on versioning in agent-to-agent systems: advertising protocol versions and capabilities in the Agent Card, negotiating the highest common ve…
Read article →Beyond Monoliths: Crafting Interoperable AI Systems with Google’s A2A Agent Architecture
In today’s interconnected digital landscape, building intelligent systems often means orchestrating multiple specialized services.
Read article →Securing A2A Endpoints with OAuth 2.0 and Scoped Permissions
In a burgeoning Agent-to-Agent (A2A) ecosystem, AI agents are constantly discovering and invoking each other's services.
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