fix(native): remove pyo3-serde; add internal serde_json->PyObject conversion; unblock maturin build

Author: gersmann

crates/codex_native/Cargo.toml

@@ -8,8 +8,7 @@ name = "codex_native"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = { version = "0.21", features = ["extension-module", "serde"] }
-pyo3-serde = "0.5"
+pyo3 = { version = "0.21", features = ["extension-module"] }
 anyhow = "1"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
@@ -19,4 +18,3 @@ tracing = "0.1"
 # Path deps into the upstream workspace
 codex-core = { path = "../../codex-proj/codex-rs/core" }
 codex-protocol = { path = "../../codex-proj/codex-rs/protocol" }
-

crates/codex_native/src/lib.rs

@@ -4,7 +4,7 @@ use codex_core::protocol::{AskForApproval, Event, EventMsg, InputItem};
 use codex_core::{AuthManager, ConversationManager};
 use codex_protocol::config_types::SandboxMode;
 use pyo3::prelude::*;
-use pyo3_serde::Serializer;
+use pyo3::types::{PyDict, PyList, PyString};
 use serde_json::Value as JsonValue;
 use std::path::PathBuf;
 
@@ -23,7 +23,7 @@ fn run_exec_collect(
     // Convert serde_json::Value -> PyObject
     let mut out = Vec::with_capacity(events.len());
     for v in events {
-        let obj = pyo3_serde::to_py(py, &v).map_err(to_py)?;
+        let obj = json_to_py(py, &v)?;
         out.push(obj);
     }
     Ok(out)
@@ -105,3 +105,35 @@ fn codex_native(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
     Ok(())
 }
 
+fn json_to_py(py: Python<'_>, v: &JsonValue) -> PyResult<PyObject> {
+    Ok(match v {
+        JsonValue::Null => py.None().into_py(py),
+        JsonValue::Bool(b) => b.into_py(py),
+        JsonValue::Number(n) => {
+            if let Some(i) = n.as_i64() {
+                i.into_py(py)
+            } else if let Some(u) = n.as_u64() {
+                u.into_py(py)
+            } else if let Some(f) = n.as_f64() {
+                f.into_py(py)
+            } else {
+                py.None().into_py(py)
+            }
+        }
+        JsonValue::String(s) => PyString::new(py, s).into_py(py),
+        JsonValue::Array(arr) => {
+            let list = PyList::empty(py);
+            for item in arr {
+                list.append(json_to_py(py, item)?)?;
+            }
+            list.into_py(py)
+        }
+        JsonValue::Object(map) => {
+            let dict = PyDict::new(py);
+            for (k, val) in map.iter() {
+                dict.set_item(k, json_to_py(py, val)?)?;
+            }
+            dict.into_py(py)
+        }
+    })
+}