Update SharpNinja.McpServer.Director version to 0.5.1-42 and enhance agent chat prompt with file system command guidance. Mark McpServer submodule as dirty.

Signed-off-by: sharpninja <ninja@thesharp.ninja>

Author: sharpninja

nupkg/SharpNinja.McpServer.Director.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
   <metadata>
     <id>SharpNinja.McpServer.Director</id>
-    <version>0.5.1-41</version>
+    <version>0.5.1-42</version>
     <authors>SharpNinja</authors>
     <description>CLI management tool for McpServer. Provides workspace management, agent orchestration, compliance policy editing, Keycloak OIDC auth, and an interactive Terminal.Gui TUI with 7 tabbed screens. 18 CLI commands via System.CommandLine.</description>
     <packageTypes>

src/McpServer.Director/Commands/AgentHostCommand.cs

@@ -1213,7 +1213,8 @@ public static DirectorAgentSettings Resolve(string? workspaceOverride)
             "Director MCP Agent chat",
             FirstNonEmpty(
                 ReadEnvironmentVariable(SystemPromptEnvironmentVariable),
-                "You are an interactive command-line assistant running inside Director-hosted McpServer.McpAgent. Be helpful and use the available MCP workflow tools whenever they help you inspect TODOs, session logs, repository context, or other MCP-backed information.")!);
+                "You are an interactive command-line assistant running inside Director-hosted McpServer.McpAgent. Be helpful and use the available MCP workflow tools whenever they help you inspect TODOs, session logs, repository context, or other MCP-backed information. " +
+                "For reading or writing arbitrary paths on the machine where Director runs, use mcp_fs_read, mcp_fs_list, and mcp_fs_write (absolute paths or paths relative to the MCP workspace). Use mcp_repo_* when MCP-server allowlists and auditing should apply.")!);
     }
 
     internal static string BuildSystemPrompt(string basePrompt, string verbosity)