signed-compare SKILL.md skillA
signed-compare from dannyan/secguard-clang is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dannyan/secguard-clang/signed-compare@git:20261016.fb3b156Pins git:20261016.fb3b156 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dannyan/secguard-clang
- Path
extension/shared/skills/signed-compare/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261016.fb3b156, committed Oct 16, 2026
- First version recorded
- Aug 31, 2026
- Size
- 2,729 bytes
- Repository stars
- 25
- License
- Apache-2.0
Classify signed-compare evidence — an unsigned variable compared with zero/negative, which is always false. Maps to CWE-681/CWE-195.
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
## Signed/Unsigned Comparison Analysis (CWE-681 / CWE-195) ### Evidence Pattern A signed-compare candidate has: - **signed_compare**: An ordering comparison between an `unsigned` variable and `0`/a negative literal whose result is a tautology because an unsigned value is never negative: - `u < 0`, `u <= -1`, `0 > u` → always false - `u >= 0`, `u > -1`, `0 <= u` → always true - **call_path**: The function is reachable from an entry point Note `u > 0` (`u != 0`) and `u <= 0` (`u == 0`) are **legitimate** checks and are not emitted. ### Detection Logic 1. Collect variable names declared with an `unsigned` type (`unsigned`, `size_t`, `uint*_t`, `uintptr_t`, ...) — including typedefs that resolve to unsigned (`typedef unsigned int my_uint; my_uint m`), resolved cross-file so a header typedef counts 2. Find relational `binary_expression` nodes 3. Flag when an unsigned variable is compared against `0`/negative in a way that is always false/true 4. Emit `SIGNED_COMPARE` otherwise (only when the declared type is provably unsigned, so the category is confirmed) ### Classification Rules | Condition | Classification | |-----------|---------------| …
Read the whole file at its exact version.
How to install
mdr add dannyan/secguard-clang/signed-compare@sha256:03b6b92f0304bea9The line at the top of this page pins the label git:20261016.fb3b156, 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_bbzd22kliq7kquz2)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 31, 2026 and Oct 16, 2026, about one every 12 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.fb3b156 latest | 2026-10-16 | fb3b156 | 2,729 B | A | view · diff |
| git:20260914.1ef9fbc | 2026-09-14 | 1ef9fbc | 2,733 B | A | view · diff |
| git:20260913.46c999d | 2026-09-13 | 46c999d | 2,805 B | A | view · diff |
| git:20260913.4c35c60 | 2026-09-13 | 4c35c60 | 2,150 B | A | view · diff |
| git:20260831.8a87156 | 2026-08-31 | 8a87156 | 2,115 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 (2729 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
dannyan/secguard-clang · 25 stars · license Apache-2.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bbzd22kliq7kquz2 GET https://markdownregistry.com/api/v1/resolve?ref=dannyan/secguard-clang/signed-compare GET https://markdownregistry.com/api/v1/blob/03b6b92f0304bea966e3364edaf04975caed5aea42a8d46d7b4df8995ad37c32
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.