How do I install the Skillset Dev Testing skill?

Run npx skillmds@latest add outfitter-dev/skillset-dev-testing in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Skillset Dev Testing safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Skillset Dev Testing?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Skillset Dev Testing free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Skillset Dev Testing?

outfitter-dev (@outfitter-dev) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Skillset Dev Testing by outfitter-dev

Name: Skillset Dev Testing
Author: outfitter-dev

Skillset Dev Testing

Design, implement, or review Skillset compiler tests, internal fixtures, deterministic projection, adapter conformance, self-hosted checks, and external adoption evidence. Use when choosing a test tier, creating fake repositories, changing test infrastructure, or proving compiler and provider-output behavior.

outfitter-dev 50fe283 2 files · 4.0 KB Updated Sep 17, 2026

File contents

Skillset Testing

Choose The Evidence Level

Read docs/adrs/0012-fixtures-tests-dogfooding-and-evals.md, docs/adrs/0019-deterministic-projection-and-adapter-conformance.md, and fixtures/README.md.
Use an inline temp fixture for focused positive, negative, diagnostic, and lifecycle cases.
Add fixtures/<case>/ only for a durable whole-repo case shared by tests or too large to read inline.
Use pinned external fixtures only for opt-in adoption fidelity evidence; turn discovered product gaps into ordinary focused regression tests.
Keep compiler fixtures, self-hosted dogfooding, deterministic skillset test declarations, provider runtime probes, and model-facing evals distinct.

Read references/fixture-strategy.md before adding a checked-in or Git-backed fixture, changing test sandbox behavior, or choosing a conformance lane.

Protect The Sandbox

Build Git-backed fixtures only with scripts/test-helpers/git-remote.ts under a proven disposable root.
Preserve HOME; rely on repository verification entrypoints to isolate XDG roots and Git configuration.
Never initialize, configure, or commit into an arbitrary temp path, linked worktree, shared Git directory, or the Skillset checkout.
Never hand-edit generated fixture output to make a test pass.

Verify Narrowly Then Broadly

Run focused tests with bun run test:focused -- <test-files...>.
Run bun run conformance:determinism, bun run conformance:adapters, or bun run conformance:fast when the compiler projection or provider contract changes.
Keep bun run conformance:external opt-in and network-aware.
Rebuild and check self-hosted output after .skillset/ changes.
Run bun run check before handoff and report any skipped slow or credentialed evidence explicitly.

---name: skillset-dev-testingdescription: Design, implement, or review Skillset compiler tests, internal fixtures, deterministic projection, adapter conformance, self-hosted checks, and external adoption evidence. Use when choosing a test tier, creating fake repositories, changing test infrastructure, or proving compiler and provider-output behavior.---# Skillset Testing## Choose The Evidence Level1. Read `docs/adrs/0012-fixtures-tests-dogfooding-and-evals.md`, `docs/adrs/0019-deterministic-projection-and-adapter-conformance.md`, and `fixtures/README.md`.2. Use an inline temp fixture for focused positive, negative, diagnostic, and lifecycle cases.3. Add `fixtures/<case>/` only for a durable whole-repo case shared by tests or too large to read inline.4. Use pinned external fixtures only for opt-in adoption fidelity evidence; turn discovered product gaps into ordinary focused regression tests.5. Keep compiler fixtures, self-hosted dogfooding, deterministic `skillset test` declarations, provider runtime probes, and model-facing evals distinct.Read [references/fixture-strategy.md](references/fixture-strategy.md) before adding a checked-in or Git-backed fixture, changing test sandbox behavior, or choosing a conformance lane.## Protect The Sandbox- Build Git-backed fixtures only with `scripts/test-helpers/git-remote.ts` under a proven disposable root.- Preserve `HOME`; rely on repository verification entrypoints to isolate XDG roots and Git configuration.- Never initialize, configure, or commit into an arbitrary temp path, linked worktree, shared Git directory, or the Skillset checkout.- Never hand-edit generated fixture output to make a test pass.## Verify Narrowly Then Broadly- Run focused tests with `bun run test:focused -- <test-files...>`.- Run `bun run conformance:determinism`, `bun run conformance:adapters`, or `bun run conformance:fast` when the compiler projection or provider contract changes.- Keep `bun run conformance:external` opt-in and network-aware.- Rebuild and check self-hosted output after `.skillset/` changes.- Run `bun run check` before handoff and report any skipped slow or credentialed evidence explicitly.

Frequently asked questions