Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3 competing prototypes and compare side by side before committing.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Exhaust the Design Space
It also applies to product design decisions where user experience depends on feel, not logic.
The line at the top of this page pins the label git:20261013.058a348, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_rzpk6gvm3cum4o6c
GET https://markdownregistry.com/api/v1/resolve?ref=michael-denyer/pstack-claude/principle-exhaust-the-design-space
GET https://markdownregistry.com/api/v1/blob/4abd4aaca2527af82dba58d908c7d91c33a0fe0f2145aa46a19bcf7fb5525db9
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michael-denyer/pstack-claude · plugins/pstack/skills/benchmark-checklist/SKILL.md · Vet a perf measurement (limiter, tuning, limits, errors, repeatability, relevance, and whether the work happened)…
michael-denyer/pstack-claude · plugins/pstack/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
michael-denyer/pstack-claude · plugins/pstack/skills/bro/SKILL.md · Restate the last message in plain human language, with no jargon. Use for /bro or when asked to say it plainly.
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michael-denyer/pstack-claude · plugins/pstack/skills/create-verification-skill/SKILL.md · Generate a project-local verification skill that drives your app the way a user does — any language, framework, or…
michael-denyer/pstack-claude · plugins/pstack/skills/figure-it-out/SKILL.md · Design an auditable playbook when no narrower one fits: a large migration, an ambitious multi-part change, or work a…
cursor/plugins · pstack/skills/principle-exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
cursor/plugins · harness/pstack/claude-code/skills/principle-exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
nightly-labs/openbot · marketplace/production-catalog/bundles/pstack/skills/principle-exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
backnotprop/pstack · skills/principle-exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
iap/pstack-hermes · skills/principle-exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
j-star-films-studios/vibecode-protocol-suite · assets/.agent/skills/engineering-principles/exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
barbieri/local-openfinance · .agents/skills/principle-exhaust-the-design-space/SKILL.md · Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3…
theonlyfusioncube/potetos-for-everyone · skills/principle-exhaust-the-design-space/SKILL.md · Build a few materially different cheap prototypes and compare evidence before committing to one design. Use when for…
