Create per-task Git sandboxes with isolated branches for Codex sessions.
npx skills add https://github.com/regenrek/agent-skills --skill codex-sandbox
Please help me install this Agent Skill. Skill: codex-sandbox Source: https://github.com/regenrek/agent-skills/tree/main/skills/codex-sandbox Command: npx skills add https://github.com/regenrek/agent-skills --skill codex-sandbox
Codex sandboxing solves the problem of cross-task contamination and Git worktree friction by giving every task its own sandbox directory and isolated branch, ensuring predictable environments and safe isolation for Codex sessions.
Ask the agent to create a sandbox for a task using the codex_sandbox tool.
High-intent search queries and answers about installing and using this skill.
Isolate parallel Codex tasks by creating a dedicated sandbox directory per task, cloning from a bare mirror and assigning each task its own separate branch to prevent Git worktree collisions and ensure predictable environments.
Block commits or pushes to main and master branches during Codex automation by installing safety hooks that prevent accidental changes to protected branches within each per-task sandbox environment.
Create a per-task sandbox for a Codex session by asking the agent to use the codex_sandbox tool, which parses remote URLs, manages bare mirrors, creates isolated sandboxes, and records metadata for full auditability.
Codex sandboxing works with both repo-scoped and user-scoped development workflows, providing a minimal Python CLI and wrapping Bash helper to manage per-task sandboxes across different project configurations.
You need a separate branch per task when running multiple Codex sessions to avoid cwd and branch mixups, prevent cross-task contamination, and ensure safe isolation between parallel Codex tasks.
A limitation of using bare mirrors for Git sandbox isolation is that the setup requires parsing remote URLs and managing the mirror cloning process, which may add overhead to multi-task projects compared to working directly in a single repository.
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