fix(codex): align current reasoning request semantics

apps/aether-gateway/src/ai_serving/planner/decision_input.rs

@@ -1,6 +1,7 @@
 use std::collections::BTreeMap;
 use std::time::Duration;
 
+use aether_ai_formats::CODEX_RESPONSES_LITE_HEADER;
 use aether_ai_serving::{run_ai_authenticated_decision_input, AiAuthenticatedDecisionInputPort};
 use aether_routing_core::{
     rank_vector_for_candidate, CandidateKind, ResolvedRoutingPolicy, RoutingCandidateFacts,
@@ -32,7 +33,6 @@ use crate::{AiExecutionDecision, AppState, GatewayError};
 const ROUTING_GROUP_SELECTION_CACHE_TTL: Duration = Duration::from_secs(30);
 const CODEX_ACCOUNT_ID_HEADER: &str = "chatgpt-account-id";
 const CODEX_FEDRAMP_HEADER: &str = "x-openai-fedramp";
-const CODEX_RESPONSES_LITE_HEADER: &str = "x-openai-internal-codex-responses-lite";
 
 #[derive(Debug, Clone)]
 pub(crate) struct ResolvedLocalDecisionAuthInput {
@@ -1035,7 +1035,7 @@ mod tests {
             "id": "gpt-future-agent",
             "slug": "gpt-future-agent",
             "use_responses_lite": true,
-            "supports_reasoning_summaries": true,
+            "supports_reasoning_summary_parameter": true,
             "default_reasoning_level": "low",
             "default_reasoning_summary": "none",
             "supported_reasoning_levels": [{"effort": "low"}, {"effort": "high"}]

apps/aether-gateway/src/ai_serving/planner/standard/normalize/tests.rs

@@ -195,7 +195,7 @@ fn local_codex_compact_wrapper_applies_the_complete_request_projection() {
         "stream_options": {"reasoning_summary_delivery": "sequential_cutoff"},
         "tool_choice": "auto",
         "parallel_tool_calls": true,
-        "reasoning": {"effort": "max", "context": "all_turns"},
+        "reasoning": {"effort": "max", "summary": "auto", "context": "all_turns"},
         "text": {"verbosity": "medium"},
         "tools": [{
             "type": "function",

apps/aether-gateway/src/handlers/public/support/models/route.rs

@@ -134,9 +134,8 @@ fn codex_model_card_is_complete(card: &serde_json::Map<String, Value>) -> bool {
             .and_then(Value::as_str)
             .is_some()
         && card
-            .get("supports_reasoning_summaries")
-            .and_then(Value::as_bool)
-            .is_some()
+            .get("supports_reasoning_summary_parameter")
+            .is_none_or(Value::is_boolean)
         && card
             .get("support_verbosity")
             .and_then(Value::as_bool)

apps/aether-gateway/src/tests/frontdoor/ai.rs

@@ -103,7 +103,6 @@ fn complete_codex_model_card(source_model_name: &str) -> serde_json::Value {
         "upgrade": null,
         "base_instructions": "Use the current Codex instructions.",
         "model_messages": null,
-        "supports_reasoning_summaries": true,
         "support_verbosity": true,
         "default_verbosity": "low",
         "apply_patch_tool_type": "freeform",