ai-patterns

A set of guidelines for building software that uses large language models, such as text-generation or AI services. It covers API calls, prompts, responses, security, errors, and usage tracking.

In plain words
What is it for?
Use it when adding LLM API calls, managing prompts, extracting structured data, handling model failures, or recording model usage and response time.
Why use it?
It helps avoid unsafe prompts, malformed or untrusted AI output, scattered prompt logic, repeated error handling, and unknown request costs or delays.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/anatomia-dev/anatomia/ai-patterns
Any agent
npx skills add anatomia-dev/anatomia --skill ai-patterns
Clone the repo
git clone --depth 1 https://github.com/anatomia-dev/anatomia

Made for: Claude Code, Codex.

Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 300 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00041 $0.00300
Opus 5 $0.00020 $0.00150
Sonnet 5 $0.00008 $0.00060
Haiku 4.5 $0.00004 $0.00030

Measured 2d ago against content hash 9de89df405b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ai-patterns 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 2d ago.

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.

packages/cli/templates/.claude/skills/ai-patterns/SKILL.md · 25 lines

What it actually says

AI Patterns

Detected

Rules

  • All LLM calls through a centralized client wrapper. Configure retry, timeout, and error handling once — not per-call.
  • Never interpolate raw user input into system prompts. User content goes in user messages with clear role boundaries. System instructions stay immutable.
  • Treat all LLM output as untrusted. Validate and sanitize before using in database queries, HTML rendering, or business logic.
  • Handle LLM errors by type: retry rate limits with backoff, truncate input for context overflow, log content filter triggers, fail gracefully for API outages.
  • Use structured output (JSON mode, tool_use) for data extraction. Never regex-parse free-text LLM responses for application data.
  • Centralize prompt templates — don't scatter prompt strings across business logic. Prompts should be versionable, testable, and reviewable independently.
  • Log model, token count, and latency per LLM call. You can't optimize cost or debug quality without knowing what each request consumed.

Gotchas

Not yet captured. Add as you discover them during development.

Examples

Not yet captured. Add short snippets showing the RIGHT way.

Files

What ships with it

1 file 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.

Changes

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.

  1. 2d ago First seen · 25 lines · 41 tokens per session scan A 9de89df405b1

Subscribe to this mod's changes

ai-patterns is a skill published in the GitHub repository anatomia-dev/anatomia (32 stars, last pushed 29d ago), licensed MIT. It adds 41 tokens to every session and 300 once invoked, about $0.0002 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 2026-08-30.

Related

Other skills, from other repositories