Skills from dcramer/dex

This skill documents the `dex` CLI for creating and managing persistent tasks and storage (e.g., `<git-root>/.dex/tasks/{id}.json`, `tasks.jsonl`). It instructs running `dex`/`npx @zeeg/dex` and permits overriding storage with `DEX_STORAGE_PATH`.

Dangerous skill: executes shell commands (`dex plan`, `dex create`, `npx @zeeg/dex`) using user-supplied files and may perform network activity. It converts markdown planning documents (e.g., `~/.claude/plans/*.md`, `SPEC.md`) into dex tasks and auto-creates subtasks.