chore: release v0.6.0

- Bump workspace version to 0.6.0
- Update CHANGELOG with MCP server, fire-and-forget dispatcher, and fixes
- Update README test badges
- Rewrite count-tests.sh to scan source annotations instead of running
  the full test suite (0.6s vs minutes)

Author: ndreno

CHANGELOG.md

@@ -7,8 +7,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.6.0] - 2026-03-27
+
 ### Added
+- **gateway**: MCP (Model Context Protocol) server — API operations are automatically exposed as AI-callable tools via JSON-RPC 2.0 at `POST /__barbacane/mcp` (ADR-0025)
+- **compiler**: `x-barbacane-mcp` extension for enabling MCP globally or per-operation, with `server_name`, `server_version`, and `description` overrides
 - **plugin**: `fire-and-forget` dispatcher — forwards request to upstream (best-effort) and returns an immediate static response, useful for webhook ingestion, async job submission, and audit trails
+- **ruleset**: `barbacane-mcp-requires-fields` vacuum rule — validates that MCP-enabled operations have `operationId` and `summary`/`description`
+
+### Fixed
+- **gateway**: CORS headers now included on `/__barbacane/*` reserved endpoints
+- **gateway**: 404 and 405 responses use RFC 9457 `application/problem+json` format
 
 ## [0.5.2] - 2026-03-25
 

Cargo.lock

@@ -19,7 +19,7 @@ exclude = [
 resolver = "2"
 
 [workspace.package]
-version = "0.5.2"
+version = "0.6.0"
 edition = "2021"
 license = "AGPL-3.0-only"
 repository = "https://github.com/barbacane-dev/Barbacane"
@@ -138,15 +138,15 @@ assert_cmd = "2"
 predicates = "3"
 
 # Workspace crates (version required for crates.io publishing)
-barbacane-sigv4 = { path = "crates/barbacane-sigv4", version = "0.5.2" }
-barbacane-compiler = { path = "crates/barbacane-compiler", version = "0.5.2" }
-barbacane-plugin-sdk = { path = "crates/barbacane-plugin-sdk", version = "0.5.2" }
-barbacane-plugin-macros = { path = "crates/barbacane-plugin-macros", version = "0.5.2" }
-barbacane-wasm = { path = "crates/barbacane-wasm", version = "0.5.2" }
-barbacane-telemetry = { path = "crates/barbacane-telemetry", version = "0.5.2" }
-barbacane-test = { path = "crates/barbacane-test", version = "0.5.2" }
-barbacane = { path = "crates/barbacane", version = "0.5.2" }
-barbacane-control = { path = "crates/barbacane-control", version = "0.5.2" }
+barbacane-sigv4 = { path = "crates/barbacane-sigv4", version = "0.6.0" }
+barbacane-compiler = { path = "crates/barbacane-compiler", version = "0.6.0" }
+barbacane-plugin-sdk = { path = "crates/barbacane-plugin-sdk", version = "0.6.0" }
+barbacane-plugin-macros = { path = "crates/barbacane-plugin-macros", version = "0.6.0" }
+barbacane-wasm = { path = "crates/barbacane-wasm", version = "0.6.0" }
+barbacane-telemetry = { path = "crates/barbacane-telemetry", version = "0.6.0" }
+barbacane-test = { path = "crates/barbacane-test", version = "0.6.0" }
+barbacane = { path = "crates/barbacane", version = "0.6.0" }
+barbacane-control = { path = "crates/barbacane-control", version = "0.6.0" }
 
 [profile.dev]
 opt-level = 0

Cargo.toml

@@ -9,9 +9,9 @@
 <p align="center">
   <a href="https://github.com/barbacane-dev/barbacane/actions/workflows/ci.yml"><img src="https://github.com/barbacane-dev/barbacane/actions/workflows/ci.yml/badge.svg" alt="CI"></a>
   <a href="https://docs.barbacane.dev"><img src="https://img.shields.io/badge/docs-docs.barbacane.dev-blue" alt="Documentation"></a>
-  <img src="https://img.shields.io/badge/unit%20tests-453%20passing-brightgreen" alt="Unit Tests">
-  <img src="https://img.shields.io/badge/plugin%20tests-668%20passing-brightgreen" alt="Plugin Tests">
-  <img src="https://img.shields.io/badge/integration%20tests-239%20passing-brightgreen" alt="Integration Tests">
+  <img src="https://img.shields.io/badge/unit%20tests-505%20passing-brightgreen" alt="Unit Tests">
+  <img src="https://img.shields.io/badge/plugin%20tests-680%20passing-brightgreen" alt="Plugin Tests">
+  <img src="https://img.shields.io/badge/integration%20tests-265%20passing-brightgreen" alt="Integration Tests">
   <img src="https://img.shields.io/badge/cli%20tests-16%20passing-brightgreen" alt="CLI Tests">
   <img src="https://img.shields.io/badge/ui%20tests-44%20passing-brightgreen" alt="UI Tests">
   <img src="https://img.shields.io/badge/e2e%20tests-11%20passing-brightgreen" alt="E2E Tests">