Skills

A small collection of practical Agent Skills.

Public monorepo. Anyone can clone this repo, run just add, or install individual skills with npx skills add. It does not depend on any private tooling. The install loop links into Claude Code, Codex, and Grok skill dirs.

Catalog: self-authored skills live under skills/ (see also the GitHub Pages registry). Highlighted ones below; the full set is every folder with a SKILL.md. Third-party modules are declared in external.yml and materialised by just vendor.

Skills

claude-5-best-practice

Renamed from fable-5-best-practice in July 2026, when Claude Opus 5 shipped near-Fable capability at half the price and the routing advice stopped being about one model. Reinstall under the new name.

Optimizes the cost of an accepted result across the Claude 5 generation — Haiku 4.5 / Sonnet 5 / Opus 5 / Fable 5 — rather than the price of a token. It treats Opus 5 as the default lead, makes Fable 5 something you justify instead of assume, and prefers climbing the effort ladder (low → max) on Opus 5 before escalating a tier. It also walks a diagnose-before-escalating loop for failures, routes subagents with pinned worker models, covers Claude 5 API behavior (adaptive thinking, effort and prompt caching, refusal stop reasons, fallback, ZDR and Priority Tier constraints), and keeps progress claims tied to real tool evidence. Volatile facts such as pricing, retention, and beta headers live in a dated references/evidence-notes.md provenance snapshot.

The skill is especially useful when migrating older prompts or skills forward: it calls out over-constrained legacy prompting, the Opus 4.8 → Opus 5 thinking and effort breaks, refusal risks, verifier agents, long-running run design, and long-run communication style.

Install:

npx skills add https://github.com/wquguru/skills --skill claude-5-best-practice

Ask for help with prompts like:

• "Does this task actually need Fable 5, or is Opus 5 enough?"
• "Help me write an Opus 5 prompt for a multi-day coding task."
• "Review this old skill before migrating to Claude 5."
• "My run missed the acceptance criteria — raise effort or change model?"

gpt-5-6-best-practice

A routing and evaluation overlay for GPT-5.6 in Codex. It optimizes the cost of an accepted result — not the price of a token — across the Sol, Terra, and Luna capability tiers: choosing the initial tier and reasoning-effort lane, diagnosing failures before escalating, keeping prompts and worker packets lean, using subagents economically, and evaluating routes on real work. Benchmark provenance and confidence levels live in references/evidence-notes.md, and references/prompt-patterns.md provides reusable task-prompt and worker-packet templates.

Install:

npx skills add https://github.com/wquguru/skills --skill gpt-5-6-best-practice

Ask for help with prompts like:

• "Which GPT-5.6 tier and effort should this task start on?"
• "This Codex run failed — raise effort, or move from Terra to Sol?"
• "Is Ultra worth it for this task, or should one agent handle it?"
• "Design a worker packet for this subagent."

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