Reference
Information-oriented. Look up exact shapes and values here, grouped by domain (same order as the other sections).
Agent core & runtime
| Page | Contents |
|---|---|
| Configuration | config/langgraph-config.yaml schema |
| Environment variables | Every env knob |
Skills, subagents & workflows
| Page | Contents |
|---|---|
| Skills (SKILL.md) | Frontmatter fields, source tags, the skills: config block |
A2A, fleet & delegates
| Page | Contents |
|---|---|
| A2A endpoints | JSON-RPC methods, SSE stream, well-known paths |
| A2A conformance | What of A2A 1.0 is implemented — methods, states, transports, gaps — plus the runnable prober |
| Agent card | Card shape with every supported field |
| Extensions | A2A extensions — URI-keyed metadata (cost-v1, worldstate-delta-v1, tool-call-v1) + MIME-typed DataParts + a2a.trace |
Tools, MCP & plugins
| Page | Contents |
|---|---|
| Starter tools | Shipped LangChain tools and their signatures |
| Plugin manifest | Every protoagent.plugin.yaml field — type, default, meaning |
| Plugin registry API | The register(registry) surface: every seam, its signature, and registry.host |
Plugin SDK (graph.sdk) | The stable capability surface — subagents, knowledge, watches, background jobs, metrics |
| Plugin testkit | The host-free harness: load_plugin, FakeRegistry, host stubs |
| Plugin CLI | python -m server plugin … — scaffold, install, sync, uninstall |
| Plugin view bridge | The sandboxed-iframe postMessage protocol — every message, direction, payload, and trust rule |
| Event bus topics | Every topic core publishes, its payload keys, and the wildcard matching rules |
Console & UI
| Page | Contents |
|---|---|
| Operator REST API | The console's /api/* control-plane endpoints, grouped by area |