confusable-unicode-audit

Included with Lifetime

$97 forever

Detect bidi controls, zero-width characters, mixed-script identifiers, and homoglyph risks in source and release metadata

Security

What this skill does


# Confusable Unicode Audit

Detect Trojan Source and homoglyph risks in source files, dependency names, and release metadata. This enforces `no-confusable-unicode` and maps curl Practice 8 into an AIWG control.

## Detection Targets

- Bidirectional controls: U+202A through U+202E, U+2066 through U+2069.
- Zero-width characters: U+200B through U+200F, U+FEFF.
- Non-ASCII identifiers in source code.
- Mixed-script identifiers, especially Latin plus Cyrillic or Greek.
- Package/dependency names containing non-ASCII or confusable characters.
- Optional metadata scan: commit subject, PR titles, release notes.

## Allowlist

Legitimate non-ASCII is declared in `.aiwg/security/confusable-unicode-allowlist.yaml`:

```yaml
version: 1
allow:
  - path: "docs/i18n/**"
    reason: "localized documentation"
  - identifier: "naive_bayes"
    codepoints: ["U+00EF"]
    reason: "historical exported API spelling"
```

## Output

Reports show file, line, column, Unicode code point, character name, and remediation. Bidi and zero-width controls are always HIGH severity.

## References

- `agentic/code/frameworks/security-engineering/rules/no-confusable-unicode.md`
- Unicode TR39
- Trojan Source / CVE-2021-42574

Files: 1

Size: 2.0 KB

Complexity: 10/100

Category: Security

Source: https://github.com/jmagly/aiwg/tree/main/agentic/code/frameworks/security-engineering/skills/confusable-unicode-audit

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