double-free SKILL.md skillA
double-free 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/double-free@git:20261017.a78401fPins git:20261017.a78401f 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/double-free/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261017.a78401f, committed Oct 17, 2026
- First version recorded
- Sep 13, 2026
- Size
- 5,066 bytes
- Repository stars
- 25
- License
- Apache-2.0
Classify double-free evidence — same variable freed twice. Maps to CWE-415.
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
## Double-Free Analysis (CWE-415) ### Evidence Pattern A double-free candidate has: - **double_free**: the same object is released twice — either passed to `free()` two or more times in one function, or released by a helper and then freed again through the global slot that still holds it - **first_free** / **second_free**: the first and second `free()`/release lines (for a global-slot case the first line is the release-helper call in the caller and `victims` names the stored objects) - **may_free**: the first release is CONDITIONAL — the release helper frees only when its own condition holds (`if (ref_count <= 0) free(p)`). The candidate is a possible double free, never a must-proof. - **call_path**: The function is reachable from an entry point ### Hint Tokens (Verdict Basis) | Token | Meaning | Your action | |-------|---------|-------------| | `free@N,M` | the two free-site lines | the ## Code Context window covers both | | `may-free` | the first release is conditional (a helper frees only on some paths) | the double free is possible, not must-proven | | `cond@<helper>` | the helper performing the conditional first release | its body decides the verdict | …
Read the whole file at its exact version.
How to install
mdr add dannyan/secguard-clang/double-free@sha256:2f50c4af156b1c91The line at the top of this page pins the label git:20261017.a78401f, 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_j6s3thjlqegbulmo)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 13, 2026 and Oct 17, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261017.a78401f latest | 2026-10-17 | a78401f | 5,066 B | A | view · diff |
| git:20261017.061e34e | 2026-10-17 | 061e34e | 4,446 B | A | view · diff |
| git:20261016.df7fb32 | 2026-10-16 | df7fb32 | 2,686 B | A | view · diff |
| git:20260914.1ef9fbc | 2026-09-14 | 1ef9fbc | 2,614 B | A | view · diff |
| git:20260913.46c999d | 2026-09-13 | 46c999d | 2,686 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 (5066 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_j6s3thjlqegbulmo GET https://markdownregistry.com/api/v1/resolve?ref=dannyan/secguard-clang/double-free GET https://markdownregistry.com/api/v1/blob/2f50c4af156b1c913ad9dd31b2b4ae8cd74ca53aef6aaa2876a5bfb76b5794ea
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.