noop-overlay (fixture)
This skill exists to demonstrate the IDT overlay discovery contract end-to-end without changing the output of any IDT command. It is intentionally trivial.
Behavior
When invoked by the IDT runtime per assets/runtime/overlay-protocol.md:
- Receive an
OverlayInput({ command, baseDraft, context }). - Return an
OverlayOutput:draft: the samebaseDraftvalue, deep-copied to make the no-mutation contract obvious. Any future change you make to the returned object MUST NOT touch Layer 1 immutable fields (see the protocol doc).warnings: a single demonstration entry —"noop-overlay invoked at priority 75; no transforms applied."— so observers can confirm discovery fired without affecting content.
Why frontmatter looks like this
| Field | Value | Why |
|---|---|---|
overlay_target |
new-course, course-audit, slides-preview |
The three IDT commands wired in DOJ-3707 (Phase 1). Listing all three lets fixture consumers pick any of them when running the simulation. |
overlay_priority |
75 |
Generic tier (annotation-only). Sits between structural (50) and voice (100). For a true no-op, the value barely matters — but choosing 75 makes the fixture useful for ordering tests where structural/voice overlays exist alongside it. |
How to use as a fixture
From a fresh sandbox directory:
mkdir -p sandbox && cd sandbox
cp -R /path/to/instructional-design-toolkit/examples/overlay-noop-example/. .
# Now sandbox/.claude-plugin/plugin.json + sandbox/skills/noop-overlay/SKILL.md exist.
# Run any IDT command from inside sandbox/:
# /idt:new-course "Test Course"
# /idt:course-audit some-existing-course
# /idt:slides-preview some-existing-course
# Discovery should pick up noop-overlay; the user-facing response should
# include the demonstration warning above; the resulting course.json should
# be byte-identical to the run made from a directory with no overlays.
Out of scope for this fixture
- Real transforms. See
dojo-academy/skills/academy-philosophyanddojo-academy/skills/content-standards(DOJ-3710) for production overlay examples. - Any kind of test runner. This is a fixture, not a test suite.