What problem does it solve? Setting up isolated development environments for parallel feature work requires manually coordinating git worktrees, Docker containers, port assignments, and agent sessions. This Skill automates that orchestration through the kinfra CLI so each milestone gets its own worktree, sandbox, and port-isolated services without conflicts. ## Core Features & Use Cases - Worktree Lifecycle Management: Create spec and implementation worktrees with kinfra spec and kinfra impl, list them with kinfra worktrees, and clean up with kinfra done. - Sandbox Provisioning: Start or rebuild Docker sandboxes with slot-based port isolation (actual_port = base_port + slot_id), with automatic secrets reuse and --refresh-secrets handling. - Observability Stack: Manage a shared Jaeger, Grafana, and Prometheus stack and filter traces by slot namespace. - Use Case: Launch an implementation environment for milestone M1 of a wellness-reminders feature with one command, get a worktree plus running sandbox plus an agent session kicked off with /kbuild, then tear everything down after the PR lands. ## Quick Start Ask the assistant to create an implementation worktree and sandbox for a feature milestone using kinfra, for example by requesting to run kinfra impl for wellness-reminders/M1.