## Why
skill-author explicitly excludes agent definition files ("Do not use to author
agent definition files"). No factory skill existed to create or improve the
.md / .agent.md files that define Claude Code subagents and Copilot CLI agents
in a plugin, project, or user scope. This fills that gap.
## Implementation Notes
Single-root scaffold convention: new-agent.sh <name> <root> derives both
provider file paths from the root by convention — plugin scope (plugin.json
present) writes both files into <root>/agents/; non-plugin scope writes
.claude/agents/<name>.md and .github/agents/<name>.agent.md. This keeps
input minimal while always generating both provider files. See ADR-0015.
Routing is file-level (not directory-level like skill-author): neither file
exists → create flow; at least one exists → improve flow; scaffold is a
file-by-file no-op so retries are safe.
No companion agent-audit skill — inline validation in the close step covers
the simpler agent field contract. agent-audit is tracked as a follow-on.
## Impact
Closes the skill-author gap for agent definitions. Follow-ons tracked in
Gitea #11: agent-audit skill and --copilot-dest override flag for non-standard
Copilot project paths.
---
ADR: docs/adr/0015-agent-author-dual-provider-scaffold.md
Refs: #10
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
skills/
Skills for this plugin. Each skill lives in its own subdirectory:
skills/
<skill-name>/
SKILL.md # required — frontmatter + skill body
META.md # required — provenance and audit fields
references/ # optional — on-demand reference docs
scripts/ # optional — executable helper scripts
assets/ # optional — templates, data files, lookup tables
Shared — both Claude Code and GitHub Copilot CLI read skills/<name>/SKILL.md.
To create or improve a skill, run /skill-author in a Claude Code session. To review a skill
without modifying it, run /skill-audit. Do not write SKILL.md by hand without following the
authoring standard — trigger descriptions and body discipline are required.