Breaking

Jim Manico Releases Grim Prompter for AI Agent Threat Modeling

October 29, 2026 at 06:33 EDT

Security
AI Agents

Jim Manico has released Grim Prompter, a free, MIT-licensed prompt library that guides Claude Code, Codex CLI and other coding agents through threat modeling a software repository. It offers 36 architecture workflows and 29 method and analysis prompts, with findings tied to repository evidence. The Grim Prompter project documents its workflows and review boundaries.

2026 · Jim Manico

Threat modeling for coding agents

Grim Prompter gives Claude Code, Codex CLI and other coding agents structured repository reviews, with findings tied to code evidence.

A library of review paths

Architecture workflows and threat-analysis methods, shown to scale.

Each full block represents 3 items; the final blue block represents 2.

From repository scope to review

Choose scope · Define the decision and code to inspect

→

Map the system · Identify components and trust boundaries

→

Analyze threats · Check existing controls and mitigations

→

Review evidence · Challenge findings before relying on them

What it structures

Repository-grounded review with file-and-line evidence, saved artifacts and a path for checking later code changes.

What still needs review

The prompts produce drafts. Reviewers must verify evidence, challenge assumptions and confirm fixes; a threat model is not a security certification.

Continue reading

The rest of this article is for AI News Blitz readers. Choose an option below to keep reading.