# Sharp Edges

> Identifies error-prone APIs, dangerous configurations, and footgun designs that enable security mistakes. Use when reviewing API designs, configuration schemas, cryptographic library ergonomics, or evaluating whether code follows 'secure by default' and 'pit of success' principles. Triggers: footgun, misuse-resistant, secure defaults, API usability, dangerous configuration.

- Skill: `plurigrid/sharp-edges` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add plurigrid/sharp-edges`
- Raw SKILL.md: https://api.skillmd.com/api/skills/plurigrid/sharp-edges/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- License: AGPL-3.0
- Author: plurigrid (https://skillmd.com/u/plurigrid)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/plurigrid/sharp-edges

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# Sharp Edges Skill

**Trit**: -1 (MINUS)
**Category**: sharp-edges
**Author**: Trail of Bits
**Source**: trailofbits/skills
**License**: AGPL-3.0

## Description

Identifies error-prone APIs, dangerous configurations, and footgun designs that enable security mistakes. Use when reviewing API designs, configuration schemas, cryptographic library ergonomics, or evaluating whether code follows 'secure by default' and 'pit of success' principles. Triggers: footgun, misuse-resistant, secure defaults, API usability, dangerous configuration.

## When to Use

This is a Trail of Bits security skill. Refer to the original repository for detailed usage guidelines and examples.

See: https://github.com/trailofbits/skills

## Related Skills

- audit-context-building
- codeql
- semgrep
- variant-analysis


## SDF Interleaving

This skill connects to **Software Design for Flexibility** (Hanson & Sussman, 2021):

### Primary Chapter: 5. Evaluation

**Concepts**: eval, apply, interpreter, environment

### GF(3) Balanced Triad

```
sharp-edges (−) + SDF.Ch5 (−) + [balancer] (−) = 0
```

**Skill Trit**: -1 (MINUS - verification)


### Connection Pattern

Evaluation interprets expressions. This skill processes or generates evaluable forms.