## What changed
- Replace the separate MXC crates with `mxc-sdk` and adapt request construction to its policy and optional environment fields.
- Preserve the native availability probe by caching successful process security environment creation and startup attribute initialization without launching a process.
- Use the SDK's native denied-path support check and configure Bazel resource compilation for Windows GNU targets.
## Testing
Extend the request construction test to verify that nonempty environments use `Some` and empty environments use `None`.
GitOrigin-RevId: 2765c8fd19ee60661b0ce7cb3cba51acadda201a
## What changed
On Windows, omit network roots whose filesystem identity cannot be inspected when expanding implicit `:root` read access. Retain inspectable shares and roots containing the policy or command working directory, and apply the same filtering during policy inspection and command launch.
Keep explicit grants unchanged and continue expanding `:root` write and deny rules across all executor volumes.
## Testing
Extend policy tests to cover filtered read roots, explicit grant precedence, and approved-command write access across all volumes.
GitOrigin-RevId: c4d7c8ce2c9138cdb4518385e2cd05f66518628e
## Why
PSEC API symbols can be present on transitional Windows builds where MXC is not enabled. Availability detection needs to verify that a native process security environment can actually be created.
## What changed
- Replace `mxc-sdk` with pinned `appcontainer_common`, `learning_mode_windows`, and `wxc_common` dependencies, and update Cargo and Bazel dependency metadata.
- Use MXC's cached create/close probe for `is_available()` and query native deny-path support through `SecurityEnvironmentApi` before launching requests with denied paths.
- Adapt request construction and the existing policy test to the vector-based environment field, and update the sandbox documentation.
GitOrigin-RevId: e8cc6a35d46884d0a069b747d33e711512ec1596
## What changed
- Replace the separate MXC crates with the pinned `mxc-sdk` 1.0.0 dependency and update Cargo and Bazel lockfiles.
- Use the cached PSEC API-set check for availability and the SDK's native deny-path capability check before launch. Native creation and request-specific capabilities are validated at launch.
- Map empty environments to `None` to retain Windows user-profile defaults, while keeping nonempty environments explicit. Document the SDK's `SystemRoot` and `LOCALAPPDATA` requirements.
- Configure Bazel's LLVM resource compiler for Windows GNU builds, document Cargo's `RC_PATH` requirement, and add `libproc` and `libsandbox` to the macOS SDK libraries.
## Testing
Update the request-building test to verify that nonempty environments remain explicit and empty environments become `None`.
GitOrigin-RevId: f3ccbb92ceaa71f16c5d6cb185a7602a5bb8da53
## What changed
- Centralize `windows-sys` at version `0.61.2` in the workspace and migrate dependent crates to it.
- Adapt Windows API calls to the updated handle, boolean, and type definitions. Replace custom handle owners with `OwnedHandle` and use `BorrowedHandle` where ownership stays with the caller.
- Add explicit wrappers for non-owning Windows handles passed between threads.
## Testing
Enable the MCP refresh cleanup test on Windows. Retain process handles to verify that a superseded MCP server stays alive during an in-flight call, exits after cancellation, and leaves the replacement running until shutdown.
GitOrigin-RevId: 86f53d9b300d13edff7154f4a7c32e34dacd2919
## What changed
Add `create_command_args()` to encode argv, permissions, policy cwd, and optional managed network context through the existing bounded environment transport.
For managed networking, generate a policy that allows IPv4 and IPv6 loopback while denying direct non-loopback egress and general inbound access. Require nonempty, nonzero proxy ports and reject `allow_local_binding=false` at both launcher and policy boundaries because native host-loopback access is bidirectional.
Document the MXC launch contract, platform requirements, and limitations.
## Testing
Add portable tests covering managed network transport and policy translation, plus rejection of missing proxy ports, zero ports, and unsupported local-binding restrictions at both boundaries.
GitOrigin-RevId: 8d31b98f94a2ba3769369aa50de8e53dc143bac4
## Why
Sandbox policies can exceed Windows command-line limits. Provide an environment transport for these larger MXC launch requests.
## What changed
- Make `MxcCommand` serializable and add JSON encoding and decoding through `CODEX_MXC_LAUNCH_*` environment variables.
- Split payloads into UTF-8-safe chunks of at most 4,096 bytes, with a 1,000,000-byte payload limit and at most 256 chunks.
- Reject malformed or duplicate transport entries and remove all transport variables during decoding, including on failure. Preserve unrelated environment variables.
## Testing
Add tests for large Unicode and escaped-argument round trips, stale variable removal, malformed transport rejection and cleanup, and oversized payload rejection without modifying the environment.
GitOrigin-RevId: 0e5ae2535ef313985a95eb8a5fd4884974dfb1eb
## Why
MXC volume-root grants are nonrecursive, and filesystem deny globs were rejected before launch.
## What changed
- Expand volume-root grants to include existing immediate children, preserving read-only carveouts and denies. Children created directly under a volume root after policy construction are not granted access.
- Normalize filesystem object aliases before and after expansion so generated grants preserve tighter access restrictions.
- Skip unavailable volumes and uninspectable generated children.
- Resolve deny globs into concrete file and directory paths using the Windows sandbox resolver.
## Testing
Add regression tests for read-only children and aliases, normalized root access, uninspectable children, and deny glob expansion alongside explicit denies.
GitOrigin-RevId: 3242e9a30d16581d6fe5b7b6e39e0e0f71ca6ef4
## What changed
Add `policy::build_request` to `codex-rs/mxc-sandbox` to translate `MxcCommand` permissions into native MXC execution requests. Preserve filesystem denies, read-only carveouts, and protected metadata paths, and resolve overlapping grants using canonical path identities.
Map network permissions to ingress, egress, and loopback policies; quote arguments for Windows process creation; and disable DACL mutation fallback. Reject unsupported symbolic roots and deny globs, empty commands, relative working directories, and non-Unicode request paths.
## Testing
Enable unit tests and add coverage for filesystem grants and carveouts, disabled DACL mutation, deny-glob rejection, relative working directories, and non-Unicode paths.
GitOrigin-RevId: 3e647ed5fa932ab9d528eb44a49dd9283ef50481
## What changed
- Add `codex-mxc-sandbox` with native MXC availability detection and a launcher that inherits standard I/O and waits for the sandboxed process.
- Reject unsupported learning-mode and fallback policies, and verify deny-path support before launch.
- Route the existing Windows MXC availability metric through the new crate and move its Windows linking dependencies alongside the adapter.
GitOrigin-RevId: e2a220b85718e00b0e710c30bbe66b6c56958176
johnl-oai