Slash commands

Lessons in this group, roughly in build order:

• built-in-slash-commands — Built-in slash commands are REPL meta-commands (typed /name at the prompt) that control the session itself…
• custom-slash-commands — A custom slash command is a Markdown file whose body becomes a reusable prompt template, invoked by its…
• command-arguments-arguments — Argument placeholders let a custom slash command accept input at call time, so one template parameterizes…
• namespaced-project-commands — Where a command file lives sets two things: its scope (project vs personal) and its namespace (the…
• frontmatter-allowed-tools — A custom command’s YAML frontmatter configures its metadata and — via allowed-tools — pre-authorizes a…