v16.4.2

@oh-my-pi/pi-agent-core

Fixed

• Fixed serialization of BigInt tool arguments to prevent data loss during remote compaction.

@oh-my-pi/pi-ai

Fixed

• Fixed compatibility with xAI by automatically downgrading OpenAI-specific tool calls and image detail settings during message history replays.
• Fixed a race condition in shared SQLite OAuth token refreshes by implementing durable credential ownership and compare-and-set persistence to prevent stale refresh failures.
• Fixed OpenAI Codex requests to include the required version header for newly gated models.

@oh-my-pi/pi-catalog

Fixed

• Fixed OpenAI Codex model discovery to include the Codex version header alongside the client_version query parameter.

@oh-my-pi/pi-coding-agent

Fixed

• Fixed an issue where BigInt values in tool arguments failed to serialize during session compaction.
• Resolved an issue where GPT-5.6 over-delegated tasks by refining task fan-out and concurrency policies in the system prompt.
• Fixed a race condition in concurrent MCP OAuth token refreshes across processes, ensuring rotating refresh tokens are only refreshed once and preventing stale token errors from clearing valid credentials.

@oh-my-pi/omp-stats

Fixed

• Fixed a crash during stats synchronization on legacy session entries that lack a cost breakdown by falling back to catalog pricing when available.

@oh-my-pi/pi-utils

Added

• Added stringifyJson utility with support for BigInt serialization.

What's Changed

• fix(codex): send version header with Codex requests by @roboomp in #5108
• fix(auth): serialize MCP OAuth refreshes by @roboomp in #5116
• fix(ai): adapted xai responses replay shapes by @any-victor in #5109

Full Changelog: v16.4.1...v16.4.2