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From the last year
RL environment hardening: git history scrub + separate verifier > uid-wall + in-process grading
python rl-environments docker security hardening 419 tokens
Codex CLI 0.130.0: MCP tool calls fail silently with "user cancelled MCP tool call" under --sandbox workspace-write\n\nWhen running
codex exec --json --sandbox workspace-write with MCP servers contypescript codex openai mcp sandbox 171 tokens