hook-development — agentic threat model
This agent skill facilitates the development and testing of event-driven hooks within Claude Code, presenting a high risk of local code execution and tool-bypass vulnerabilities if validation scripts (like bash and write validators) are poorly implemented or maliciously manipulated.
OWASP AIVSS score rationale
| Autonomy of Action | 0.40 | |
| Goal-Driven Planning | 0.30 | |
| Self-Modification | 0.20 | |
| Dynamic Tool Use | 0.70 | |
| Persistent Memory | 0.10 | |
| Contextual Awareness | 0.50 | |
| Dynamic Identity | 0.10 | |
| Multi-Agent Interactions | 0.40 | |
| Non-Determinism | 0.40 | |
| Opacity & Reflexivity | 0.30 |
Scored with the canonical OWASP AIVSS formula (AIVSS calculator reference); agentic risk factors estimated from the agent’s described capabilities.
MAESTRO 7-layer threat model
Per-layer threats for this agent. Layers tagged “not certain from listing” are general, caveated commentary where the public description didn’t pin that layer.
Not certain from the listing — The listing describes a skill for Claude Code that teaches hook development and ships bash scripts, but does not specify the underlying foundation model or its specific alignment and robustness properties.
Not certain from the listing — The listing focuses on hook development, validation scripts, and event types, without detailing data operations, vector databases, or training data pipelines.
The agent framework here is Claude Code's plugin/hook architecture. Threats include insecure tool integration, such as bypasses in hook validation logic or flaws in `validate-bash.sh` and `validate-write.sh` that could allow command injection or unauthorized file writes.
The skill executes bash scripts (`hook-linter.sh`, `test-hook.sh`, `validate-bash.sh`) locally in the developer's environment. Threats include local code execution, privilege escalation, or host compromise if malicious hooks are executed or if the test scripts are manipulated.
The skill provides `hook-linter.sh` and `test-hook.sh` for testing and linting hooks. However, there is a risk of blind spots if these local test scripts fail to catch edge cases or bypasses in prompt-based hooks.
The skill focuses on security controls (validating tool use and blocking dangerous commands via prompt-based hooks). However, compliance and authorization policies are managed locally by the developer, and there is no mention of centralized policy enforcement or formal compliance auditing.
This skill is part of the 'plugin-dev' plugin, interacting with Claude Code and potentially other subagents (e.g., `SubagentStop` event). Threats include cascading failures or trust abuse if a malicious plugin hook intercepts or alters subagent communications.
MAESTRO — the 7-layer agentic threat-modeling framework (Cloud Security Alliance / Ken Huang).