adding headroom and codex-gema

.codex/config.toml

@@ -1,3 +1,5 @@
+model_provider = "headroom"
+
 # doc: https://developers.openai.com/codex/config-advanced
 #      https://developers.openai.com/codex/config-reference
 
@@ -25,13 +27,14 @@ trust_level = "trusted"
 
 sandbox_mode = "workspace-write"
 personality = "pragmatic"
-model_reasoning_effort = "low"
+model_reasoning_effort = "medium"
+plan_mode_reasoning_effort = "high"
+
 
 
 notify = ["/Users/jetpac/.codex/computer-use/Codex Computer Use.app/Contents/SharedSupport/SkyComputerUseClient.app/Contents/MacOS/SkyComputerUseClient", "turn-ended"]
 # approvals_reviewer = "guardian_subagent"
 approvals_reviewer  = "auto_review"
-plan_mode_reasoning_effort = "high"
 
 
 [features]
@@ -70,9 +73,6 @@ wire_api = "responses"
 stream_max_retries = 20
 request_max_retries = 20
 
-
-
-
 [profiles.gpt-5-5-pro]
 model = "gpt-5.5-pro"
 model_provider = "oca-responses"
@@ -1334,6 +1334,15 @@ approval_mode = "approve"
 [mcp_servers.mcp_gateway.tools.devops__get_property_defaults]
 approval_mode = "approve"
 
+[mcp_servers.headroom]
+command = "headroom"
+args = ["mcp", "serve"]
+enabled = false
+
+[mcp_servers.serena]
+command = "uvx"
+args = ["--from", "git+https://github.com/oraios/serena", "serena", "start-mcp-server", "--project-from-cwd", "--context", "codex"]
+
 [mcp_servers.node_repl]
 args = []
 command = "/Applications/Codex.app/Contents/Resources/node_repl"
@@ -1378,3 +1387,9 @@ CODEX_CLI_PATH = "/Applications/Codex.app/Contents/Resources/codex"
 
 # [mcp_servers.local_exec.tools.local_exec_run]
 # approval_mode = "approve"
+
+[model_providers.headroom]
+name = "OpenAI via Headroom proxy"
+base_url = "http://127.0.0.1:8787/v1"
+supports_websockets = true
+env_http_headers = { "X-Headroom-Project" = "HEADROOM_PROJECT" }