Add redMCP stdio MCP server

redMCP/README.md

@@ -35,6 +35,7 @@ Basic issue CRUD is exposed on the same wrapper:
 
 ```php
 $issues = $client->issues(['project_id' => 'customer-service', 'status_id' => 'open', 'limit' => 10]);
+$filtered = $client->filterIssues(['query_id' => 12, 'limit' => 25]);
 $issue = $client->issue(39858);
 
 $created = $client->createIssue([
@@ -47,6 +48,23 @@ $client->updateIssue((int) $created['id'], ['notes' => 'Follow-up note']);
 $client->deleteIssue((int) $created['id']);
 ```
 
+Native Redmine search is exposed separately from issue filtering. Use
+`filterIssues()` or `issues()` when you already know the structured filters.
+Use `search()` or `searchIssues()` when you want Redmine's built-in text search:
+
+```php
+$results = $client->search('power supply', [
+    'all_words' => '1',
+    'limit' => 10,
+]);
+
+$issueResults = $client->searchIssues('power supply', [
+    'project_id' => 'customer-service',
+    'open_issues' => '1',
+    'limit' => 10,
+]);
+```
+
 `updateIssue()` is intentionally safe by default: on Helpdesk-backed issues, a
 normal Redmine note does **not** send an email to the customer. To send through
 the Helpdesk plugin, opt in explicitly:
@@ -66,6 +84,33 @@ Use the default non-email update for internal notes, status/category/assignee
 changes, and automation cleanup. Use the Helpdesk email path only when the
 caller deliberately wants the customer to receive mail.
 
+## MCP server
+
+`redMCP` can also run as a stdio MCP server. It reads Redmine credentials from
+environment variables or `redMCP/.env`:
+
+```sh
+redMCP/bin/redmcp-server.php
+```
+
+Example client configuration:
+
+```json
+{
+  "mcpServers": {
+    "redmcp": {
+      "command": "/home/iadnah/redmine/redMCP/bin/redmcp-server.php"
+    }
+  }
+}
+```
+
+The server exposes tools for native Redmine filtering/search, issue CRUD,
+Helpdesk-aware issue reads, and explicit Helpdesk email responses. Tools that
+can send customer-visible mail require an explicit tool call such as
+`redmine_send_helpdesk_response` or `redmine_update_issue` with
+`send_helpdesk_email=true`.
+
 ## Test instance
 
 A working test copy of Redmine is available on the LAN at `192.168.50.170`.