Bump all SDK versions to 0.3.0-alpha for multi-language release

Java (Maven Central), Go, Node.js (npm), Python (PyPI) all bumped
to 0.3.0-alpha. CHANGELOG updated with Go SDK, Node.js SDK, shared
types, cross-SDK CI, MCP auth, and example apps.

Author: Rohit

CHANGELOG.md

@@ -4,10 +4,74 @@ All notable changes to AgentTel are documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.3.0-alpha] - 2026-03-16
+## [0.3.0-alpha] - 2026-03-20
 
 ### Added
 
+**Go SDK (agenttel-go) — Full Feature Parity**
+
+Core (`go.agenttel.dev/agenttel`):
+- Semantic attributes (~60 constants) matching Java/Python SDKs
+- All enums (`ServiceTier`, `ErrorCategory`, `DependencyType`, etc.)
+- YAML configuration loader from `agenttel.yml`
+- `AgentTelSpanProcessor` with baseline/anomaly/SLO enrichment
+- Rolling baseline provider, composite baseline, z-score anomaly detection
+- SLO tracker with error budget calculation
+- Error classifier, topology registry, structured event emitter
+- HTTP, Gin, and gRPC middleware
+
+GenAI Instrumentation (sub-modules):
+- `go.agenttel.dev/agenttel/genai/openai` — OpenAI SDK wrapper (sync + streaming)
+- `go.agenttel.dev/agenttel/genai/anthropic` — Anthropic SDK wrapper (sync + streaming)
+- `GenAiSpanBuilder` for consistent span creation with cost calculation
+
+Agentic Observability:
+- `AgenticTracer` — builder pattern API for agent tracing
+- Invocation, step, tool call scopes with auto-closing
+- Orchestration patterns: sequential, parallel, eval-loop
+
+Agent Interface:
+- MCP server (JSON-RPC 2.0 over HTTP) with tool registry
+- Bearer token auth with API key registry and RBAC
+- Health aggregation, incident context, remediation registry
+
+**Node.js SDK (@agenttel/node) — Full Feature Parity**
+
+Core (`@agenttel/node`):
+- Semantic attributes (~60 constants) matching Java/Python/Go SDKs
+- All enums with TypeScript type safety
+- YAML configuration loader from `agenttel.yml`
+- `AgentTelSpanProcessor` with baseline/anomaly/SLO enrichment
+- Rolling baseline provider, composite baseline, z-score anomaly detection
+- SLO tracker with error budget calculation
+- Error classifier, topology registry, structured event emitter
+- Express and Fastify middleware
+
+GenAI Instrumentation:
+- OpenAI SDK wrapper (sync + streaming)
+- Anthropic SDK wrapper (sync + streaming)
+- `GenAiSpanBuilder` for consistent span creation with cost calculation
+
+Agentic Observability:
+- `AgenticTracer` — builder pattern API for agent tracing
+- Invocation, step, tool call scopes
+- Orchestration patterns: sequential, parallel, eval-loop
+
+Agent Interface:
+- MCP server (JSON-RPC 2.0 over HTTP) with tool registry
+- Bearer token auth with API key registry and RBAC
+
+**Shared Types (@agenttel/types)**
+- Canonical TypeScript attribute constants, enums, and interfaces
+- Dual ESM/CJS build for use by @agenttel/node and browser SDK
+
+**Cross-SDK Improvements**
+- `attributes.json` — canonical attribute schema (single source of truth)
+- `scripts/validate-attributes.sh` — CI parity enforcement across all 4 SDKs
+- Unified CI pipeline: Java (JDK 17/21), Go (1.24), Node (20), Python (3.11/3.12/3.13)
+- MCP server auth (Bearer token + RBAC) added to Java SDK
+- Example apps: Go net/http, Gin, Express, Fastify, FastAPI, Spring Boot
+
 **Python SDK (agenttel-python) — Full Feature Parity**
 
 Core (`agenttel`):

agenttel-node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@agenttel/node",
-  "version": "0.1.0",
+  "version": "0.3.0-alpha",
   "description": "AgentTel SDK for server-side Node.js — agent-ready observability enrichment",
   "type": "module",
   "main": "./dist/cjs/index.js",

agenttel-python/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "agenttel"
-version = "0.1.0"
+version = "0.3.0-alpha"
 description = "AgentTel Python SDK — AI-native telemetry for Python services"
 readme = "README.md"
 license = "Apache-2.0"

agenttel-python/src/agenttel/__init__.py

@@ -10,4 +10,4 @@
     "AgentTelSpanProcessor",
 ]
 
-__version__ = "0.1.0"
+__version__ = "0.3.0-alpha"

agenttel-types/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@agenttel/types",
-  "version": "0.1.0",
+  "version": "0.3.0-alpha",
   "description": "Shared types, enums, and attribute constants for AgentTel SDKs",
   "type": "module",
   "main": "./dist/cjs/index.js",

gradle.properties

@@ -1,5 +1,5 @@
 GROUP=dev.agenttel
-VERSION_NAME=0.2.0-alpha
+VERSION_NAME=0.3.0-alpha
 POM_URL=https://github.com/rrohitramsen/AgentTel
 POM_SCM_URL=https://github.com/rrohitramsen/AgentTel
 POM_SCM_CONNECTION=scm:git:git://github.com/rrohitramsen/AgentTel.git