add generated jsonschema for config.toml

AGENTS.md

@@ -13,6 +13,7 @@ In the codex-rs folder where the rust code lives:
 - Use method references over closures when possible per https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure_for_method_calls
 - When writing tests, prefer comparing the equality of entire objects over fields one by one.
 - When making a change that adds or changes an API, ensure that the documentation in the `docs/` folder is up to date if applicable.
+- If you change `ConfigToml` or nested config types, run `just write-config-schema` to update `codex-rs/core/config.schema.json`.
 
 Run `just fmt` (in `codex-rs` directory) automatically after making Rust code changes; do not ask for approval to run it. Before finalizing a change to `codex-rs`, run `just fix -p <project>` (in `codex-rs` directory) to fix any linter issues in the code. Prefer scoping with `-p` to avoid slow workspace‑wide Clippy builds; only run `just fix` without `-p` if you changed shared crates. Additionally, run the tests:
 

codex-rs/core/BUILD.bazel

@@ -26,9 +26,12 @@ codex_rust_crate(
     # the working directory is different and so the file is not found unless it
     # is explicitly added as test data.
     #
-    # TODO(aibrahim): Update the tests so that `just bazel-remote-test` succeeds
-    # without this workaround.
-    test_data_extra = ["//:AGENTS.md"],
+    test_data_extra = [
+        "config.schema.json",
+        # TODO(aibrahim): Update the tests so that `just bazel-remote-test`
+        # succeeds without this workaround.
+        "//:AGENTS.md",
+    ],
     integration_deps_extra = ["//codex-rs/core/tests/common:common"],
     test_tags = ["no-sandbox"],
     extra_binaries = [

codex-rs/core/Cargo.toml

@@ -9,6 +9,10 @@ doctest = false
 name = "codex_core"
 path = "src/lib.rs"
 
+[[bin]]
+name = "codex-write-config-schema"
+path = "src/bin/config_schema.rs"
+
 [lints]
 workspace = true
 
@@ -58,6 +62,8 @@ reqwest = { workspace = true, features = ["json", "stream"] }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
 serde_yaml = { workspace = true }
+clap = { workspace = true, features = ["derive"] }
+schemars = { workspace = true }
 sha1 = { workspace = true }
 sha2 = { workspace = true }
 shlex = { workspace = true }