mahmood726-cyber

P0 Placeholder Hmac — Design skill for Claude Code

Design community

name: P0-placeholder-hmac description: 'Placeholder HMAC signatures shipping as real crypto.

How to install P0 Placeholder Hmac

Installs to ~/.claude/skills/mahmood726-cyber-sentinel-p0-placeholder-hmac/SKILL.md

Terminal

mkdir -p ~/.claude/skills/mahmood726-cyber-sentinel-p0-placeholder-hmac && curl -fsSL https://raw.githubusercontent.com/mahmood726-cyber/Sentinel/HEAD/skills/P0-placeholder-hmac.md -o ~/.claude/skills/mahmood726-cyber-sentinel-p0-placeholder-hmac/SKILL.md

Restart Claude Code, or start a new session, for it to be picked up.

What P0 Placeholder Hmac does

name: P0-placeholder-hmac description: 'Placeholder HMAC signatures shipping as real crypto. Any string matching SIG_RSA_SHA256_ or signature_placeholder indicates an unreplaced TruthCert scaffold.' trigger: commit severity: BLOCK scope: repo source: 'lessons.md#cryptography--signing-learned-2026-04-14'

Placeholder HMAC signatures shipping as real crypto. Any string matching

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