chore(protocol): migrate ts-json-schema-generator to v2 (no legacy fallback); regenerate schema + types\n\n- Pin npx to ts-json-schema-generator@^2; use boolean --additional-properties\n- Run end-to-end gen: cargo helper → schema postprocess → datamodel-codegen\n- Update CHANGELOG entry for v2 requirement\n\nNotes:\n- Keep generated files in tree; Codex review action should ignore diffs for generated content.

Author: gersmann

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on Keep a Changelog and this project adheres to Semantic Ver
 - Unify protocol generation to TS → JSON Schema → Pydantic v2 using a native helper binary (`codex-protocol-schema`).
 - Generate readable union variants (e.g., `EventMsgError`, `ClientRequestNewConversation`) via schema post‑processing.
 - Allow extra fields on generated models via a shared `BaseModelWithExtras`.
+- Require `ts-json-schema-generator` v2.x (no legacy fallback) and use boolean `--additional-properties` flag accordingly.
 
 ### Removed
 - Old TS→Python converter script (`scripts/generate_protocol_py.py`) and legacy Makefile flow.

codex/protocol/types.py

@@ -1,7 +1,7 @@
 # generated by datamodel-codegen:
 # ruff: noqa: F821
 #   filename:  protocol.schema.json
-#   timestamp: 2025-09-14T16:47:21+00:00
+#   timestamp: 2025-09-14T17:06:06+00:00
 
 from __future__ import annotations
 

crates/codex_native/src/bin/protocol_schema.rs

@@ -129,9 +129,10 @@ fn run_typescript_json_schema(tsconfig_path: &Path, schema_path: &Path) -> Resul
         ));
     }
 
+    // Require ts-json-schema-generator v2.x (no legacy fallback).
     let status = Command::new(npx)
         .arg("--yes")
-        .arg("ts-json-schema-generator@1.5.1")
+        .arg("ts-json-schema-generator@^2")
         .arg("--path")
         .arg(&entry)
         .arg("--tsconfig")