security-diff-scan SKILL.md skillA
security-diff-scan from cowork-os/cowork-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cowork-os/cowork-os/security-diff-scan@git:20260919.c03e78bPins git:20260919.c03e78b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cowork-os/cowork-os
- Path
resources/plugin-packs/codex-security/skills/security-diff-scan/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260919.c03e78b, committed Sep 19, 2026
- First version recorded
- Jun 6, 2026
- Size
- 9,833 bytes
- Repository stars
- 535
- License
- MIT
Use when the user asks for a security review of a pull request, commit, branch diff, working-tree patch, or other Git-backed change set.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Security Diff Scan Used when a user wants to review a Git-backed change set for security regressions. Keep the scan phases separate and produce final HTML and markdown reports. ## Phase Sequence Keep these phases distinct and run them in linear order: 1. `$threat-model` 2. `$finding-discovery` 3. `$validation` 4. `$attack-path-analysis` 5. Generate final output Treat this skill as the top-level orchestrator for the four skills plus the final report assembly step. Do not collapse the phases together. For each phase: 1. Read that phase's skill. 2. Load only the inputs required for that phase. 3. Complete that phase's workflow and checklist. 4. Only then read the next phase's skill. Do not read ahead into later-phase skills until the current phase has completed. Do not amortize effort across phases: complete each phase to the full depth expected by that phase before moving on. ## Goal Setup …
Read the whole file at its exact version.
How to install
mdr add cowork-os/cowork-os/security-diff-scan@sha256:6743de77b69888beThe line at the top of this page pins the label git:20260919.c03e78b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_kuunvzk4phpmupwe)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 6, 2026 and Sep 19, 2026, about one every 105 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260919.c03e78b latest | 2026-09-19 | c03e78b | 9,833 B | A | view · diff |
| git:20260606.a4decec | 2026-06-06 | a4decec | 9,836 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9833 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
cowork-os/cowork-os · 535 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kuunvzk4phpmupwe GET https://markdownregistry.com/api/v1/resolve?ref=cowork-os/cowork-os/security-diff-scan GET https://markdownregistry.com/api/v1/blob/6743de77b69888be07cf676b8190227e8fa1074b761937878ecb9d7465a47800
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.