Add MCP servers, swift-lsp plugin, and Context7 documentation rules (#6)

* Add Context7 and XcodeBuildMCP servers to project MCP config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add swift-lsp plugin to project settings

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add Context7 documentation lookup rules to CLAUDE.md

Instructs Claude to use Context7 MCP for documentation lookup
before falling back to web search, with library references
specific to this project.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: BrentMifsud

.claude/settings.json

@@ -1,6 +1,7 @@
 {
   "enabledPlugins": {
-    "swift-concurrency@swift-concurrency-agent-skill": true
+    "swift-concurrency@swift-concurrency-agent-skill": true,
+    "swift-lsp@claude-plugins-official": true
   },
   "extraKnownMarketplaces": {
     "swift-concurrency-agent-skill": {

.mcp.json

@@ -0,0 +1,23 @@
+{
+  "mcpServers": {
+    "context7": {
+      "type": "stdio",
+      "command": "npx",
+      "args": [
+        "-y",
+        "@upstash/context7-mcp@latest"
+      ],
+      "env": {}
+    },
+    "XcodeBuildMCP": {
+      "type": "stdio",
+      "command": "npx",
+      "args": [
+        "-y",
+        "xcodebuildmcp@latest",
+        "mcp"
+      ],
+      "env": {}
+    }
+  }
+}

CLAUDE.md

@@ -39,4 +39,13 @@ The `HTTPRequest` protocol has special handling for bodyless requests:
 ### Testing Approach
 
 Tests use Swift Testing framework (`@Suite`, `@Test`, `#expect`). Network tests mock `URLSession` via `MockURLProtocol` configured on an ephemeral session configuration.
-- When running tests, be sure to run tests for all supported platforms
+- When running tests, be sure to run tests for all supported platforms
+
+## Documentation Lookup (Context7)
+
+When working on this project, **always use Context7** to look up documentation before relying on training data or web search. Use the `mcp__context7__resolve-library-id` and `mcp__context7__get-library-docs` tools.
+
+Key libraries relevant to Simplicity:
+- **Foundation** — `URLSession`, `URLRequest`, `URLCache`, `JSONEncoder`/`JSONDecoder` APIs
+- **Swift Concurrency** — actors, `async`/`await`, `@Sendable`, `@concurrent`, `nonisolated`
+- **Swift Testing** — `@Suite`, `@Test`, `#expect`, `#require`, `Issue.record`