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Navigate and build in a Replit pnpm multi-artifact monorepo without silent failures. Covers the non-obvious rules that cause blank previews, port conflicts, workflow naming errors, and broken cross-artifact imports: BASE_URL prefix discipline, PORT env var reading, managed workflow naming, pnpm catalog drift, and workspace:* shared library wiring. Activate for "add an artifact", "create a new app", "preview path", "port conflict", "blank preview", "shared package", "workflow naming", "pnpm catal
Passed 20 of 20 test cases with the skill, and 10 of 20 without it.
and 12 more in the full report
11 fixed11 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
The preview pane for `artifacts/reporting-tool` renders a blank screen with a 403 Forbidden console error originating from the proxy. What specific configuration setting in `vite.config.ts` is missing?
| Checked | Without skill | With skill |
|---|---|---|
| The diagnosis identifies missing allowedHosts: true in the Vite server settings | Missed | Passed |
The instructions your model reads when the skill loads.
OverKill Hill P³ · overkillhill.com · github.com/OKHP3
Each of the following rules has caused a multi-turn debugging session in a real project. None of them is in the artifact creation walkthrough. This skill exists because knowing the rule before you hit the failure is worth four turns of debugging.
| In scope | Out of scope |
|---|---|
| BASE_URL prefix rule | Artifact bootstrapping — read the artifacts skill |
| PORT env var discipline | Workflow restart mechanics — read the workflows skill |
| Managed workflow naming | Package installation — read the package-management skill |
| pnpm catalog drift | Secrets / env vars — read the environment-secrets skill |
| Cross-artifact shared libraries | |
| Blank-preview debug checklist |
| Kind | Bootstrap skill to read | Notes |
|---|---|---|
web (React/Vite) | react-vite | OpenAPI-first for fullstack; skip codegen for frontend-only |
slides | slides | Read BEFORE creating — it runs pre-generation questions |
video | video-js | Delegate entire build to a DESIGN subagent |
mobile | expo | AsyncStorage by default; no backend on first build |
design | design-system-creation | Only on explicit ask; drives tokens.json |
api | (none) | Pre-configured; do not re-create |
mockup-sandbox | mockup-sandbox | Pre-installed; do not call createArtifact |
Never call createArtifact twice for the same slug. If artifacts/<slug>/ already exists, the call fails.
Every route and API call in an artifact must prepend import.meta.env.BASE_URL (Vite artifacts) or the equivalent base path helper.
test cases passed, vs 10 / 20 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.