feat(mcp): agent usability overhaul — merge health, rename params, add JSON

- Merge dev_health into dev_status (section="health") — 6 tools → 5
- Delete HealthAdapter, its tests, and schema
- Rename dev_patterns `query` → `filePath` to prevent LLM misuse
- Add `format: "json"` to dev_patterns for token-efficient agent workflows
- Add negative guidance to dev_patterns description (NOT for search/refs)
- Add `suggestion` field to all adapter error responses for agent recovery
- Update regression test to expect 5 adapters

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: prosdev

packages/cli/src/commands/mcp.ts

@@ -13,7 +13,6 @@ import {
   SearchService,
 } from '@prosdevlab/dev-agent-core';
 import {
-  HealthAdapter,
   InspectAdapter,
   MapAdapter,
   MCPServer,
@@ -121,11 +120,6 @@ Available Tools (6):
             defaultFormat: 'compact',
           });
 
-          const healthAdapter = new HealthAdapter({
-            repositoryPath,
-            vectorStorePath: vectors,
-          });
-
           const refsAdapter = new RefsAdapter({
             searchService,
             defaultLimit: 20,
@@ -138,7 +132,7 @@ Available Tools (6):
             defaultTokenBudget: 2000,
           });
 
-          // Create MCP server with 6 adapters
+          // Create MCP server with 5 adapters (health merged into status)
           const server = new MCPServer({
             serverInfo: {
               name: 'dev-agent',
@@ -149,14 +143,7 @@ Available Tools (6):
               logLevel: logLevel as 'debug' | 'info' | 'warn' | 'error',
             },
             transport: options.transport === 'stdio' ? 'stdio' : undefined,
-            adapters: [
-              searchAdapter,
-              statusAdapter,
-              inspectAdapter,
-              healthAdapter,
-              refsAdapter,
-              mapAdapter,
-            ],
+            adapters: [searchAdapter, statusAdapter, inspectAdapter, refsAdapter, mapAdapter],
           });
 
           // Handle graceful shutdown

packages/mcp-server/bin/dev-agent-mcp.ts

@@ -13,7 +13,6 @@ import {
   saveMetadata,
 } from '@prosdevlab/dev-agent-core';
 import {
-  HealthAdapter,
   InspectAdapter,
   MapAdapter,
   RefsAdapter,
@@ -274,11 +273,6 @@ async function main() {
       defaultFormat: 'compact',
     });
 
-    const healthAdapter = new HealthAdapter({
-      repositoryPath,
-      vectorStorePath: filePaths.vectors,
-    });
-
     const refsAdapter = new RefsAdapter({
       searchService,
       defaultLimit: 20,
@@ -291,7 +285,7 @@ async function main() {
       defaultTokenBudget: 2000,
     });
 
-    // Create MCP server with 6 adapters
+    // Create MCP server with 5 adapters (health merged into status)
     const server = new MCPServer({
       serverInfo: {
         name: 'dev-agent',
@@ -302,14 +296,7 @@ async function main() {
         logLevel,
       },
       transport: 'stdio',
-      adapters: [
-        searchAdapter,
-        statusAdapter,
-        inspectAdapter,
-        healthAdapter,
-        refsAdapter,
-        mapAdapter,
-      ],
+      adapters: [searchAdapter, statusAdapter, inspectAdapter, refsAdapter, mapAdapter],
     });
 
     // Start server