hunting-bug-variants SKILL.md skillA
hunting-bug-variants from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/hunting-bug-variants@git:20260816.c75b58dPins git:20260816.c75b58d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/hunting-bug-variants/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260816.c75b58d, committed Aug 16, 2026
- Size
- 6,594 bytes
- Repository stars
- 26
- License
- MIT
Given one confirmed vulnerability, systematically find its siblings: the same defect shape repeated elsewhere in the codebase, and the parts of it the fix left uncovered. Use right after you confirm or read about a bug (your own finding, a CVE, a patch, a writeup) and want the other instances instead of stopping at one. Turns a single seed into a structural signature and sweeps the whole tree for same-shape code, copy-paste clones, sibling handlers, and incomplete fixes. Covers signature…
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
# Hunting bug variants: one seed, every sibling
One bug is almost never alone. The same mistake gets copy-pasted, re-implemented
by a second author, or left uncovered by a fix that only patched the reported
call site. Variant hunting takes a *single confirmed defect* and turns it into a
signature you can sweep the whole codebase with, so you find the three other
copies before an attacker does.
## When to use
- You just confirmed a bug and want its siblings, not a victory lap.
- A CVE, advisory, or writeup describes a bug in code you can read.
- A fix landed and you want to know whether it covered every instance.
- Someone says "we already patched that" and you want to verify it is really gone.
## Scope check
Authorized source only (your own, OSS, CTF, in-scope engagement). If you can't
name the authorization, stop.
## The loop
1. **Anchor the seed.** State the confirmed defect precisely: the exact sink, the
exact missing or wrong step (no bounds check, no authz check, unnormalized
path, unescaped context), and the untrusted input that drives it. A vague seed
("there was an injection somewhere") produces a useless sweep.
…Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/hunting-bug-variants@sha256:05f2d04d1121adfcThe line at the top of this page pins the label git:20260816.c75b58d, 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_qdexvhhdwclx22bt)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 16, 2026.
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 (6594 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
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qdexvhhdwclx22bt GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/hunting-bug-variants GET https://markdownregistry.com/api/v1/blob/05f2d04d1121adfcdd4472dfac9ba110ad8a5880ae066a70543d7251f79615d9
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.