| name | builtin-skills |
| description | Use when creating a new builtin skill for Phosphor, editing an existing builtin skill (internal/skills/builtin/), or when the user needs to understand how the embedded skill system works. |
Builtin Skills
Phosphor embeds skills directly into the binary via internal/skills/builtin/.
These are always available without user configuration.
How It Works
- Each skill lives in
internal/skills/builtin/<skill-name>/SKILL.md.
- The tree is embedded at compile time via
//go:embed builtin/* in
internal/skills/embed.go.
DiscoverBuiltin() walks the embedded FS, parses each SKILL.md, and sets
paths with the phosphor://skills/ prefix (e.g., phosphor://skills/jq/SKILL.md).- The View tool resolves
phosphor:// paths from the embedded FS, not disk.
- User skills with the same name override builtins (last occurrence wins in
Deduplicate()).
Adding a New Builtin Skill
- Create
internal/skills/builtin/<skill-name>/SKILL.md with YAML frontmatter
(name, description) and markdown instructions. The directory name must
match the name field.
- No extra wiring needed —
//go:embed builtin/* picks up new directories
automatically.
- Add a test assertion in
TestDiscoverBuiltin in
internal/skills/skills_test.go to verify discovery.
- Build and test:
go build . && go test ./internal/skills/...
Existing Builtin Skills
| Skill | Directory | Description |
|---|
phosphor-config | builtin/phosphor-config/ | Phosphor configuration help |
phosphor-hooks | builtin/phosphor-hooks/ | Authoring, configuring and debugging hooks |
jq | builtin/jq/ | jq JSON processor usage guide |
