fix: idempotent container-use config claude (#293)

* fixes #249 - remove server config prior to adding it for idempotency

Signed-off-by: Connor Braa <connor@dagger.io>

* change format of AGENT.md to match cu config agent claude

Signed-off-by: Connor Braa <connor@dagger.io>

---------

Signed-off-by: Connor Braa <connor@dagger.io>

Author: cwlbraa

AGENT.md

@@ -2,12 +2,6 @@ This is a development environment for container-use, a CLI tool that provides co
 
 container-use is designed to work with MCP-compatible agents like Claude Code and Cursor.
 
-ENVIRONMENT:
-
-- ALWAYS use ONLY Environments for ANY and ALL file, code, or shell operations—NO EXCEPTIONS—even for simple or generic requests.
-- DO NOT install or use the git cli with the environment_run_cmd tool. All environment tools will handle git operations for you. Changing ".git" yourself will compromise the integrity of your environment.
-- You MUST inform the user how to view your work using `container-use log <env_id>` AND `container-use checkout <env_id>`. Failure to do this will make your work inaccessible to others.
-
 DEVELOPMENT WORKFLOW:
 
 - Build: Use 'go build -o container-use ./cmd/container-use' or 'dagger call build --platform=current export --path ./container-use'
@@ -47,4 +41,13 @@ DOCS:
 
 - Documentation is in `./docs`, written using Mintlify
 - When making changes, make sure the files are properly formatted in mdx
-- To start a preview, run `mint dev` from the docs folder
+- To start a preview, run `mint dev` from the docs folder
+
+<!-- container-use-rules -->
+ALWAYS use ONLY Environments for ANY and ALL file, code, or shell operations—NO EXCEPTIONS—even for simple or generic requests.
+
+DO NOT install or use the git cli with the environment_run_cmd tool. All environment tools will handle git operations for you. Changing ".git" yourself will compromise the integrity of your environment.
+
+You MUST inform the user how to view your work using `container-use log <env_id>` AND `container-use checkout <env_id>`. Failure to do this will make your work inaccessible to others.
+
+<!-- container-use-rules -->

cmd/container-use/agent/configure_claude.go

@@ -42,6 +42,10 @@ func (c *ConfigureClaude) description() string {
 }
 
 func (c *ConfigureClaude) editMcpConfig() error {
+	// Remove existing MCP server (ignore errors if it doesn't exist)
+	removeCmd := exec.Command("claude", "mcp", "remove", "container-use")
+	_ = removeCmd.Run() // Ignore error - server might not exist
+
 	// Add MCP server
 	cmd := exec.Command("claude", "mcp", "add", "container-use", "--", ContainerUseBinary, "stdio")
 	err := cmd.Run()