chore: add agent skills for agent threads

.obvious/skills-manifest.json

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+{
+  "_about": "Written by Sam's vendor_skills.py. A refresh replaces only the skill folders and files listed here; any other folder under .obvious/skills/ belongs to this repo and is never touched.",
+  "skills": [
+    "anti-ui-slop",
+    "blast-radius",
+    "pstack-benchmark-checklist",
+    "pstack-create-verification-skill",
+    "pstack-principle-boundary-discipline",
+    "pstack-principle-explain-the-number",
+    "pstack-principle-foundational-thinking",
+    "pstack-principle-prove-it-works",
+    "pstack-principle-test-behavior-not-implementation",
+    "pstack-principle-type-system-discipline",
+    "pstack-technical-writing"
+  ],
+  "files": []
+}

.obvious/skills/anti-ui-slop/CHECKSUMS.sha256

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+f1411aac76d20cf8b94a6c1376daf1ddcd1005c338cf45831c5531aeb7391171  agents/openai.yaml
+02bb8c3b4e70190e3986c0404ad2fd8d639b4f534252d82379cc1b502b6d1812  LICENSE
+ac7cbac310d74dde573d18ac6caec6c51c3499eb9c766a043e4cfae75bc06daf  MANIFEST.json
+5d84775dccdfbd3b9a1bfa634a79b17ad2742b6ab04f3684cd966f35294e9a39  MODIFICATIONS.md
+03efc08e3a77d4c5bf10b4abefa7348445b77aceba48ddd87fbf06adcbaee94f  NOTICE
+0e8e36dbca739b4b545bb45608f18def6263402bc8268e263d653e3f05f90c39  reference/audit.md
+5cf9acf215f145ae152a53314f3a95f119b9984aa0cf7da8d61caf75619a65e9  reference/distill.md
+817cf6e7b79c6181658c618a4c5fe42cd06b9438f647daae86e241dfb1eea11d  reference/ios.md
+da668bd62e99d88b9d76f7a970c02b135245611fabd669fd65cfeaf028441c8d  reference/new-work.md
+be6eec1114d122a9a115e31ddf1568567792b33f03ce35ff9e12e96af302696d  reference/operate.md
+8435138f1bf85d93654ca91f0e725bb271d4288ac352c6596e9a64ffcdada651  reference/polish.md
+21616e54cefae88396b521591e8b6170e82314c4abf06b9ca14453508c884477  references/uizze-reference-policy.md
+0d6630376cdd3d834130fce46372846393cfa98a3e63756196c3535335bdfac0  SKILL.md

.obvious/skills/anti-ui-slop/LICENSE

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.obvious/skills/anti-ui-slop/MANIFEST.json

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+{
+  "name": "anti-ui-slop",
+  "version": "quiet-expert-v12",
+  "designStack": {
+    "version": "4.1.1",
+    "commit": "5a149f3fdb1b5793f10567233b1dcab98fc305fd",
+    "license": "Apache-2.0"
+  },
+  "designAuthority": "uizze",
+  "evidenceMode": "concrete-need-only",
+  "included": [
+    "reference/new-work.md",
+    "reference/operate.md",
+    "reference/polish.md",
+    "reference/distill.md",
+    "reference/audit.md",
+    "reference/ios.md"
+  ]
+}

.obvious/skills/anti-ui-slop/MODIFICATIONS.md

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+# Modifications notice
+
+Uizze packages a licensed design stack pinned at version 4.1.1, commit 5a149f3fdb1b5793f10567233b1dcab98fc305fd. Uizze maintains the router, reference policy, packaging, versioning, and distribution. Product-facing instructions use Uizze terminology.

.obvious/skills/anti-ui-slop/NOTICE

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+# Third-Party Notices
+
+This project includes content derived from third-party work, used under the terms of its original license.
+
+## Platform Design Skills
+
+The `reference/ios.md` playbook includes material distilled from ehmo's
+`platform-design-skills` (Apple Human Interface Guidelines).
+
+**Original work:** https://github.com/ehmo/platform-design-skills
+**Original license:** MIT
+**Author:** ehmo

.obvious/skills/anti-ui-slop/SKILL.md

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+---
+name: anti-ui-slop
+description: Run the Uizze reference-guided design playbook or UI finish check when explicitly requested. Use for anti-ui-slop, grounding an interface in real examples, or a Uizze audit; not as an extra default for every UI task.
+license: MIT
+metadata:
+  version: "1.2.13"
+  author: "UIZZE <business@uizze.com>"
+  compatibility: "Designed for Claude Code, Codex, Cursor, and GitHub Copilot; works in any agent that can read project files and fetch a URL."
+  tags: "ui-design, design-system, design-review, frontend, web-ui, ios-ui"
+---
+
+> **Stop AI coding agents from shipping generic UI.**
+
+# Stop Making UI Slop
+
+Build product-specific UI with 800,000+ real web and iOS screens via [UIZZE](https://uizze.com).
+
+![Stop Making UI Slop with UIZZE](https://uizze.com/landing/anti-ui-slop-skill-banner.png)
+
+## Overview
+
+Use the product brief, existing UI, components, and local design system to make intentional interfaces. Uizze supplies focused design guidance and, when useful, a small number of relevant visual references.
+
+## Prerequisites
+
+- A screen or component to build, redesign, or review — a file path or a short description.
+- The product's existing components, design tokens, and visual language, so the build extends them instead of inventing a new system.
+- Optional access to the paid Uizze MCP for focused references and hosted materials.
+
+## Authentication
+
+- The free skill and public catalogue work without an account, token, MCP connection, dependency, script, or executable.
+- The optional full UIZZE MCP may use the host's normal connection and authentication flow. Never claim it is connected without an actual host result.
+
+## Work from the product
+
+Read the brief, existing UI, components, tokens, and constraints before designing. They always outrank this skill. Keep familiar interaction conventions and make the product's own objects, workflow, and priorities visually clear. Do not add novelty for its own sake.
+
+## Load one playbook
+
+Choose at most one file for the current request:
+
+- New interface or major redesign: `reference/new-work.md`
+- Product or dashboard work: `reference/operate.md`
+- Refinement and polish: `reference/polish.md`
+- Simplification or distillation: `reference/distill.md`
+- Explicit audit: `reference/audit.md`
+- Native iOS work: `reference/ios.md`
+
+Do not load a second playbook. Apply judgment rather than treating its examples as a checklist.
+
+## Optional Uizze evidence
+
+Read `references/uizze-reference-policy.md` before using the paid MCP. It exposes exactly `find_ui_references` and `find_ui_materials`. Use them only when a concrete unresolved visual or material question would benefit from evidence. If they return nothing, continue silently.
+
+## Finish
+
+Complete the requested scope. When the environment supports it, render and inspect once. Fix observable breakage such as clipping, overlap, distorted media, inaccessible controls, or inert interactions. Keep the handoff concise.

.obvious/skills/anti-ui-slop/agents/openai.yaml

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+interface:
+  display_name: "Uizze Anti UI Slop"
+  short_description: "Design guidance with quiet visual evidence"
+  default_prompt: "Use Uizze for design judgment. Retrieve evidence or materials only for one concrete unresolved need."

.obvious/skills/anti-ui-slop/reference/audit.md

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+# Audit an implemented interface
+
+Review only what can be observed in the implementation or rendered result. Do not invent missing requirements or turn personal taste into a defect.
+
+Inspect:
+
+- task clarity and hierarchy;
+- consistency with the product's existing system;
+- layout, overflow, media treatment, and responsive behavior;
+- interaction feedback and necessary loading, empty, error, success, disabled, and recovery states;
+- labels, focus, keyboard access, target size, and contrast;
+- obvious performance problems visible in the experience.
+
+Return at most three material findings, ordered by user impact. For each finding, name the observable evidence and the smallest concrete correction. If nothing material is visible, say so briefly. An audit does not modify the product unless the user also asked for fixes.

.obvious/skills/anti-ui-slop/reference/distill.md

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+# Simplify an interface
+
+Remove obstacles between the user and the main task without removing necessary capability.
+
+## Find the excess
+
+- Identify the primary goal and the information required to complete it.
+- Remove repeated copy, duplicate actions, decorative noise, and containers that do not clarify grouping.
+- Reduce unnecessary variation in colors, type sizes, button styles, spacing, and surface treatments.
+- Prefer one obvious primary action and a small number of clearly subordinate actions.
+- Use progressive disclosure for advanced or infrequent controls, but keep essential information visible.
+
+## Preserve clarity
+
+- Do not hide required actions behind mystery interactions.
+- Do not remove labels, focus states, accessibility semantics, error messages, or recovery paths.
+- Do not flatten genuinely complex information until it becomes harder to understand.
+- Prefer spacing and alignment over nested cards; prefer plain language over explanatory copy.
+
+Verify that the simplified result still supports the complete task, including its important states, at the relevant screen sizes.