using-patterns

95 / 100 · Low risk

Fine to try.

By DavidSouther/ailly (GitHub) · design · 16 stars · scanned at commit 3b72cbd

Use when a design pressure needs a named pattern from this catalog — wrapping a primitive (newtype), modeling entities or value objects (domain-objects), many-field construction (builder), encapsulation (visibility), untrusted input (parse-dont-validate), failure signalling (errors-typed-untyped), lifecycle phases (type-states), persistence (repository, aggregate, unit-of-work), application wiring (bootstrap-and-service), tests (arrange-act-assert, triangulate, bifurcate), conversions (type-con…

Works with any agent that supports SKILL.md skills.

What this skill can do

Connects to the internet

The author does not mention this.

Found in 4 places.

patterns/skills/using-patterns/references/patterns/errors-typed-untyped.md, line 42const user = await users.fetch(id); // returns Result<User, FetchError>
patterns/skills/using-patterns/references/patterns/errors-typed-untyped/python.md, line 38def fetch_user(client: httpx.Client, user_id: str) -> User:
patterns/skills/using-patterns/references/patterns/errors-typed-untyped/python.md, line 41except httpx.HTTPError as cause:

Show 1 more

patterns/skills/using-patterns/references/patterns/errors-typed-untyped/typescript.md, line 28res = await fetch(`/users/${id}`);

Other copies in this repository

DavidSouther/ailly has 1 more folder with a skill named using-patterns. This page shows the lowest-scoring copy.

harness/e2e/judge-calibration/evals/synthetic/context/skills/using-patterns 100/100 · Low risk

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'using-patterns' ] || [ -L ~/.agents/skills/'using-patterns' ]; then echo 'A skill folder named using-patterns already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/DavidSouther/ailly' "$d" && git -C "$d" checkout --quiet '3b72cbd7d7d6d933ac8e173639b08c833d2a844a' -- 'patterns/skills/using-patterns' && mkdir -p ~/.agents/skills && cp -R "$d"/'patterns/skills/using-patterns' ~/.agents/skills/'using-patterns' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'using-patterns' ~/.claude/skills/'using-patterns' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-12	`3b72cbd`	95