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security-model

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Define, review, or update SECURITY_MODEL.md files that tell security review tools a repository's threat model, trust boundaries, invariants, reportable finding classes, and exclusions. Use when asked to "write a security model", "threat model this repo for scanners", "define security review scope", "what counts as a vulnerability here", "update SECURITY_MODEL.md", "why did the scanner flag or miss this", or to check whether existing security guidance still matches the code. Not for running a security review or editing the SECURITY.md disclosure policy.

skills/security-model/SKILL.md

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Last checked
Nov 4, 2026

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1,135
Repository last updated
Nov 5, 2026
License
Apache-2.0

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

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<!--
Adapted from the define-security-policy skill in openai/codex-security
(https://github.com/openai/codex-security, Apache-2.0). Changes: policy file
renamed to SECURITY_MODEL.md, Node helper replaced with a Python resolver,
base-revision resolution for diff reviews, a stale-reference check, stable
invariant IDs, a finding class table, explicit parent overrides, dated
accepted-risk entries, and rules keeping suspected gaps and open questions
out of committed policy.
-->

# Security Model

A `SECURITY_MODEL.md` tells security review tools what matters in a repository: the system boundary, who is trusted, which properties must hold, which finding classes are reportable and how severe they are, and what is out of scope. It is policy context for reviewers, not executable instructions.
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