GSD Pi is a command-line coding agent and project workflow system that plans, implements, verifies, and tracks software work through milestones, tasks, Git worktrees, and stored project notes. It is for developers who want structured, longer-running agent sessions using different model providers. The catalogue entries extend GSD Pi with skills and agents.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/open-gsd/gsd-pi/userinterface-wikinpx skills add open-gsd/gsd-pi --skill userinterface-wikigit clone --depth 1 https://github.com/open-gsd/gsd-piWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/open-gsd/gsd-pi/userinterface-wiki)<a href="https://agentmods.dev/skills/open-gsd/gsd-pi/userinterface-wiki"><img src="https://agentmods.dev/badge/skills/open-gsd/gsd-pi/userinterface-wiki.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00052 | $0.03537 |
| Opus 5 | $0.00026 | $0.01768 |
| Sonnet 5 | $0.00010 | $0.00707 |
| Haiku 4.5 | $0.00005 | $0.00354 |
Grade A, and why
userinterface-wiki scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- userinterface-wiki — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 254 lines — stays where its author put it; the contents beside it link to each section on GitHub.
User Interface Wiki
Comprehensive UI/UX best practices guide for web interfaces. Contains 152 rules across 12 categories, prioritized by impact to guide automated code review and generation.
When to Apply
Reference these guidelines when:
- Implementing or reviewing animations (CSS transitions, Motion/Framer Motion)
- Choosing between springs, easing curves, or no animation
- Working with AnimatePresence and exit animations
- Writing CSS with pseudo-elements or View Transitions API
- Adding audio feedback or procedural sound to UI
- Building morphing icon components
- Animating container width/height with dynamic content
- Designing UI that respects cognitive psychology (Fitts's, Hick's, Miller's laws)
- Implementing predictive prefetching for perceived performance
- Setting up typography, OpenType features, or numeric formatting
Rule Categories by Priority
| Priority | Category | Impact | Prefixes |
|---|---|---|---|
| 1 | Animation Principles | CRITICAL | timing-, physics-, staging- |
| 2 | Timing Functions | HIGH | spring-, easing-, duration-, none- |
| 3 | Exit Animations | HIGH | exit-, presence-, mode-, nested- |
| 4 | CSS Pseudo Elements | MEDIUM | pseudo-, transition-, native- |
| 5 | Audio Feedback | MEDIUM | a11y-, appropriate-, impl-, weight- |
| 6 | Sound Synthesis | MEDIUM | context-, envelope-, design-, param- |
| 7 | Morphing Icons | LOW | morphing- |
| 8 | Container Animation | MEDIUM | container- |
| 9 | Laws of UX | HIGH | ux- |
| 10 | Predictive Prefetching | MEDIUM | prefetch- |
| 11 | Typography | MEDIUM | type- |
| 12 | Visual Design | HIGH | visual- |
Quick Reference
1. Animation Principles (CRITICAL)
timing-under-300ms- User animations must complete within 300mstiming-consistent- Similar elements use identical timing valuestiming-no-entrance-context-menu- Context menus: no entrance animation, exit onlyeasing-natural-decay- Use exponential ramps for natural decay, not lineareasing-no-linear-motion- Linear easing only for progress indicatorsphysics-active-state- Interactive elements need :active scale transformphysics-subtle-deformation- Squash/stretch in 0.95-1.05 rangephysics-spring-for-overshoot- Springs for overshoot-and-settle, not easingphysics-no-excessive-stagger- Stagger delays under 50ms per itemstaging-one-focal-point- One prominent animation at a timestaging-dim-background- Dim modal/dialog backgroundsstaging-z-index-hierarchy- Animated elements respect z-index layers
What ships with it
60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- rules/_sections.md 3.2 KB
- rules/_template.md 418 B
- rules/a11y-reduced-motion-check.md 554 B
- rules/a11y-toggle-setting.md 508 B
- rules/a11y-visual-equivalent.md 674 B
- rules/a11y-volume-control.md 438 B
- rules/appropriate-confirmations-only.md 334 B
- rules/appropriate-errors-warnings.md 320 B
- rules/appropriate-no-decorative.md 347 B
- rules/appropriate-no-high-frequency.md 519 B
- rules/appropriate-no-punishing.md 478 B
- rules/container-callback-ref.md 701 B
- rules/container-guard-initial-zero.md 588 B
- rules/container-no-excessive-use.md 446 B
- rules/container-overflow-hidden.md 581 B
- rules/container-transition-delay.md 478 B
- rules/container-two-div-pattern.md 794 B
- rules/container-use-resize-observer.md 1.1 KB
- rules/context-cleanup-nodes.md 395 B
- rules/context-resume-suspended.md 455 B
- rules/context-reuse-single.md 524 B
- rules/design-filter-for-character.md 497 B
- rules/design-noise-for-percussion.md 544 B
- rules/design-oscillator-for-tonal.md 410 B
- rules/duration-max-300ms.md 347 B
- rules/duration-press-hover.md 372 B
- rules/duration-shorten-before-curve.md 411 B
- rules/duration-small-state.md 247 B
- rules/easing-entrance-ease-out.md 378 B
- rules/easing-exit-ease-in.md 353 B
- rules/easing-for-state-change.md 451 B
- rules/easing-linear-only-progress.md 390 B
- rules/easing-natural-decay.md 515 B
- rules/easing-no-linear-motion.md 521 B
- rules/easing-transition-ease-in-out.md 287 B
- rules/envelope-exponential-decay.md 383 B
- rules/envelope-no-zero-target.md 407 B
- rules/envelope-set-initial-value.md 418 B
- rules/exit-key-required.md 529 B
- rules/exit-matches-initial.md 490 B
- rules/exit-prop-required.md 595 B
- rules/exit-requires-wrapper.md 437 B
- rules/impl-default-subtle.md 280 B
- rules/impl-preload-audio.md 607 B
- rules/impl-reset-current-time.md 404 B
- rules/mode-pop-layout-for-lists.md 477 B
- rules/mode-sync-layout-conflict.md 589 B
- rules/mode-wait-doubles-duration.md 480 B
- rules/morphing-aria-hidden.md 358 B
- rules/morphing-consistent-viewbox.md 446 B
- rules/morphing-group-variants.md 922 B
- rules/morphing-jump-non-grouped.md 581 B
- rules/morphing-reduced-motion.md 644 B
- rules/morphing-spring-rotation.md 516 B
- rules/morphing-strokelinecap-round.md 323 B
- rules/morphing-three-lines.md 537 B
- rules/morphing-use-collapsed.md 511 B
- rules/native-backdrop-styling.md 497 B
- rules/native-placeholder-styling.md 515 B
- rules/native-selection-styling.md 269 B
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 254 lines · 52 tokens per session scan A 663ccc340e7e
userinterface-wiki is a skill published in the GitHub repository open-gsd/gsd-pi (1,198 stars, last pushed today), licensed MIT. It adds 52 tokens to every session and 3,537 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
gsd-sketch
Sketch UI/design ideas with throwaway HTML mockups, or propose what to sketch next (frontier mode).
gsd-ui-phase
Generate UI design contract (UI-SPEC.md) for frontend phases.
gsd-ui-review
Retroactive 6-pillar visual audit of implemented frontend code.
gsd-graphify
Build, query, and inspect the project knowledge graph in .planning/graphs/.
gsd-quick
Execute a quick task with GSD guarantees (atomic commits, state tracking) but skip optional agents.
gsd-complete-milestone
Archive completed milestone and prepare for next version.