v0.21.4

[0.21.4] - 2026-05-01

Added

• Added explicit frontmatter package identifiers for agents and saved chains, registering runtime names like code-analysis.scout while preserving separate name and package fields on save.
• Added recursive subdirectory discovery for user and project agent and chain definitions.
• Added outputMode: "inline" | "file-only" for saved subagent outputs. inline remains the default, while file-only returns a concise saved-file reference instead of injecting full saved output back into the parent context.

Fixed

• Marked Pi runtime peer dependencies as optional so npm package installs do not auto-install duplicate Pi packages or emit unrelated transitive dependency warnings.