ui-first-principles SKILL.md skillA
ui-first-principles from sd0xdev/sd0x-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sd0xdev/sd0x-harness/ui-first-principles@git:20260905.a2f4303Pins git:20260905.a2f4303 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sd0xdev/sd0x-harness
- Path
skills/ui-first-principles/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260905.a2f4303, committed Sep 5, 2026
- First version recorded
- Apr 27, 2026
- Size
- 22,705 bytes
- Repository stars
- 194
- License
- MIT
First-principles UI/IA reasoning: turns a `<scenario>` + API field set into JTBD analysis, principle-anchored field-priority decisions, anti-pattern findings, and a bidirectional UI↔API gap report. Trigger: UI、UX、資訊架構、IA、scenario-driven UI、欄位優先級、information hierarchy. Not for: visual/CSS work (use `/frontend-design`), post-build critique (use `/critique`), or simplifying existing layouts (use `/distill`).
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
# UI First-Principles Reasoning chain: `<scenario>` → JTBD → 5 IA/cognitive principles → field decisions → anti-patterns → gap report → validated handoff doc. > **Output**: `handoff-ui-first-principles.md` (default `<cwd>/handoff-ui-first-principles.md`, override with `--output`). Downstream `/frontend-design` reads §5 Information Hierarchy directly. ## Non-Negotiable Rules > SKILL.md is the normative source. Files under the `references/` directory elaborate but do not override. | # | Rule | Violation = | |---|------|-------------| | 1 | Phase 1 (`redact.js`) **must** run before any LLM phase. Raw input never enters Phases 3–6. | Skill invalid (PII risk) | | 2 | Phase 7 critical violation (`pii_leak_fingerprint` / `pii_leak_regex` / `missing_decision`) → **1 retry** with violation context → still critical → emit `⚠️ Need Human` (no warn-only fallback). | Retry policy breach | | 3 | Principle Anchor column **must** hold one ID from `JTBD \| CognitiveLoadTheory \| HicksLaw \| MillersLaw \| ProgressiveDisclosure`. Multi-principle prose is fine in rationale. | `invalid_anchor` soft violation | …
Read the whole file at its exact version.
How to install
mdr add sd0xdev/sd0x-harness/ui-first-principles@sha256:b118323818e5c77bThe line at the top of this page pins the label git:20260905.a2f4303, 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.
[](https://markdownregistry.com/a/art_g66qui2a6ofzga2x)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Apr 27, 2026 and Sep 5, 2026, about one every 131 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260905.a2f4303 latest | 2026-09-05 | a2f4303 | 22,705 B | A | view · diff |
| git:20260427.4abb8a0 | 2026-04-27 | 4abb8a0 | 21,858 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (22705 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
sd0xdev/sd0x-harness · 194 stars · license MIT · pushed 2026-10-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_g66qui2a6ofzga2x GET https://markdownregistry.com/api/v1/resolve?ref=sd0xdev/sd0x-harness/ui-first-principles GET https://markdownregistry.com/api/v1/blob/b118323818e5c77b683bebdd09c8a51b52634da0c83065b918fb548b2518134a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.