Fills a gap needed for the planned forge orchestrator skill: neither doc set
previously stated when to build a skill vs a subagent/custom agent. Sourced
via context7 against the same libraries already recorded in each sources.md.
Also confirms agentskills.io's spec is runtime-agnostic and defines no agent
concept, so it has no bearing on this decision by design.
Separates development-time reference material from live plugin docs.
agentskillsio/, agentsmd/, and examples/skill-write/ are not shipped with
the plugin — grouping them under research/ makes that boundary explicit.
README now lists all top-level files and explains what research/ is for.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>