Concepts and terminology
Shared vocabulary for Lattice Hub resources, release semantics, and AI registries—without treating Namespace as tenancy or A2A as a runtime.
Use this page to align on product language before reading guides or principles. Facts follow the control-plane implementation: a Namespace is an environment, A2A registers capability metadata only, and Pole Agent prepares drafts without publishing.
| Term | Meaning |
|---|
| Lattice Hub | Product brand for the cloud-native control plane for services and agents. |
| Pole Control Plane | Technical product (pole-control-plane) owning APIs, domain servers, cache, storage, and protocol entry points. |
| Console | Platform UI; can run in-process (--mode all) or separately (--mode console). |
| Pole Agent | Conversational Console workspace. Reads via allowlisted MCP tools; confirmed config writes become drafts only. |
| Rust SDK | Proxyless client that consumes discovery, configuration, and governance views. |
| Thin SDK | Multi-language Sidecar contract clients (Go / Java / Python / Node.js / C++ / C#) via Sidecar Session and TargetService v1—not a full Proxyless governance SDK. |
| Pole Sidecar | Pingora-based local data plane. Executes routing locally; facts still come from the control plane. |
| Limiter | Distributed rate-limit runtime module in the Control Plane artifact; deploy via limiter-server / full modes instead of listing it as a separate ecosystem component. |
| Kubernetes Controller | Syncs Kubernetes Services/annotations and can inject the Sidecar. |
| Term | Meaning | Not this |
|---|
| Namespace | Runtime environment boundary (dev/staging/prod). The same logical service has independent content and releases per Namespace. | Tenant, team space, or org boundary. |
| Service | Directory entry that hosts instances, rules, and related resources. | Not automatically a Kubernetes Service. |
| Instance | A callable endpoint with address, weight, health, isolation, and metadata. | Health failure is not the same as directory deletion. |
| Revision | Fingerprint of a resource view for cache freshness. | Not a Git commit. |
| Service Contract | Interface contract for callers. | Not a governance rule. |
| Term | Meaning |
|---|
| Config Group | Groups configuration files. |
| Config File | Editable configuration content. |
| Config Release | Immutable published snapshot consumed by clients. |
| Progressive delivery | Ship a release to a subset of clients before full rollout or rollback. |
| Long-poll / SSE | Client watch mechanisms for configuration changes. |
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| Term | Meaning |
|---|
| Rule object | Console-managed rule used for create/edit/delete. |
| Rule Release | Version that can be published, activated, rolled back, or stopped. |
| Active Release | Version clients, SDKs, xDS, and Sidecars actually read. |
| Edit vs publish | Editing the rule object does not change runtime until publish. |
Nine governance families: route, lane, rate limit, circuit breaker, fault detect, lossless lifecycle, traffic security, traffic mirror, traffic mock.
| Term | Meaning | Boundary |
|---|
| MCP Registry | Registers MCP servers and tools in API, cache, store, and Console. | Not a general workflow engine. |
| A2A Agent Registry | Registers agent cards, skills, protocol interfaces, and metadata. | Not a task proxy or agent runtime. |
| Pole MCP tools | Allowlisted tools Pole Agent may call. | Non-allowlisted tools are unavailable to the agent. |
| Proposal / draft | Previewed config change saved only as a draft after confirmation. | Humans still publish. |
| Term | Meaning |
|---|
| API server slots | Protocol plugins under plugin/apiserver/*. |
| Domain server | Shared business semantics (discover, config, goverrule, admin). |
| Interceptor chain | Cross-cutting proxies; current order auth → paramcheck. |
| CacheManager | Low-latency read views with incremental refresh (lastMtime - 5s overlap). |
| Store | Source of truth; default MySQL pole_server plus pole_observability. |
| History / DiscoverEvent / Statis | Operation history, discovery events, and statistics plugin chains. |
| OTel boundary | Metrics/logs via Collector and GreptimeDB—not a full APM product claim. |
| Pattern | When to use |
|---|
| Console / API | Platform management and release review. |
| Rust SDK | In-process proxyless governance. |
| Thin SDK | Multi-language target-envelope contracts for local Pole Sidecar (end-to-end listener still evolving). |
| Kubernetes Controller | Cluster sync and injection. |
| Pole Sidecar | Language-agnostic local proxy path. |
| Compatible protocols | Existing Nacos / Apollo / Eureka / Envoy clients. |
- Features
- Control-plane assembly
- Server installation
- Using the Console
