[Release] Bump version to v0.5.1

Patch release fixing database lock errors during concurrent hook execution
and adding MCP auto-registration for plugin installs.

Author: codenamev

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-memory",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Long-term self-managed memory for Claude Code with fact extraction, truth maintenance, and provenance tracking",
   "author": {
     "name": "Valentino Stoll"

.claude/CLAUDE.md

@@ -1,4 +1,4 @@
-<!-- ClaudeMemory v0.5.0 -->
+<!-- ClaudeMemory v0.5.1 -->
 # Project Memory
 
 @.claude/rules/claude_memory.generated.md

CHANGELOG.md

@@ -4,6 +4,20 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [0.5.1] - 2026-02-04
+
+### Fixed
+
+- **Database Lock Errors**: Fixed "database is locked" and "database is busy" errors when
+  multiple Claude Code hooks run concurrently
+  - Added application-level retry with exponential backoff (5 retries, 0.1s base delay)
+  - Reduced SQLite busy_timeout from 30s to 1s for faster failure detection
+  - Added `with_retry` and `transaction_with_retry` methods for concurrent access handling
+  - SQLite's busy_timeout doesn't reliably detect lock release; app-level retry compensates
+
+- **MCP Server Auto-Registration**: Added `.mcp.json` at plugin root so MCP server is
+  automatically registered when plugin is installed (previously only worked in dev directory)
+
 ## [0.5.0] - 2026-02-04
 
 ### Added

lib/claude_memory/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module ClaudeMemory
-  VERSION = "0.5.0"
+  VERSION = "0.5.1"
 end

spec/claude_memory/mcp/text_summary_spec.rb

@@ -191,17 +191,18 @@
 
   describe ".summarize_check_setup" do
     it "summarizes setup status" do
+      current_version = ClaudeMemory::VERSION
       result = {
         status: "ok",
-        version: {current: "0.5.0", latest: "0.5.0"},
+        version: {current: current_version, latest: current_version},
         components: {global_database: true, project_database: true, hooks_configured: true},
         issues: [],
         warnings: []
       }
       summary = described_class.summarize_check_setup(result)
 
       expect(summary).to include("Setup status: ok")
-      expect(summary).to include("0.5.0")
+      expect(summary).to include(current_version)
     end
   end
 end