Executor Abstraction

A reusable abstraction for running implementation work in an isolated workspace, independent of which agent host (Claude Code, Codex) or which mechanism is available. Lifecycle skills speak one vocabulary of operations; this skill maps each operation to a concrete recipe per mode. It is consumed as a library by /aep-launch, /aep-build, and /aep-autopilot, and can be invoked standalone to dry-run detection (see Standalone Usage).

Native-first: Claude Code launches use a native in-process background subagent (native-bg-subagent, the default) or — where the claude --bg flag exists — native background sessions (claude-bg); Codex launches use native subagents (codex-subagent) or headless exec workers (codex-exec). tmux+cmux is the legacy mode — selected only by explicit pin (git config aep.executor-backend tmux) or on generic hosts. Every mode runs its worker in an AEP-created git worktree at .feature-workspaces/<ws>.