c SKILL.md skillA
c from jnpiyush/agentx is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jnpiyush/agentx/c@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jnpiyush/agentx
- Path
.github/skills/languages/c/SKILL.md- Versions recorded
- 2
- Latest version
- v1.0.0, committed Sep 15, 2026
- First version recorded
- Apr 4, 2026
- Size
- 7,695 bytes
- Repository stars
- 19
- License
- Apache-2.0
Write safe, portable, and efficient C code using modern C23-era practices. Use when building systems software, embedded components, native libraries, POSIX tooling, or FFI boundaries where precise control over memory, layout, and runtime cost matters.
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
# C Development > WHEN: Writing or reviewing C code, native libraries, embedded components, POSIX tools, or C interfaces where memory layout, portability, and deterministic runtime behavior matter. ## When to Use This Skill - Building native C libraries and command-line tools - Implementing embedded or systems-level components - Designing FFI-safe interfaces for other languages - Hardening pointer-heavy or buffer-heavy code - Modernizing legacy C to safer, clearer patterns ## Decision Tree ``` C Project Decision +-- Hosted application? | +-- Portable CLI? -> ISO C23 + small platform abstraction layer | +-- POSIX-only tooling? -> C23 + POSIX APIs with portability notes +-- Embedded / firmware? | +-- No allocator allowed? -> static storage + arena/fixed buffers | +-- ISR / hard real-time? -> avoid blocking, heap, and hidden copies +-- Public API? | +-- Cross-language FFI? -> opaque handles + explicit ownership rules | +-- Internal only? -> expose structs only when layout coupling is acceptable +-- Error handling? | +-- Recoverable runtime errors? -> status codes + out parameters | +-- Fatal init/config errors? -> fail fast at process boundary +-- Build system? …
Read the whole file at its exact version.
How to install
mdr add jnpiyush/agentx/c@sha256:c41e3d6de2b21110The line at the top of this page pins the label v1.0.0, 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_du2huz6qjq4cpucn)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Apr 4, 2026 and Sep 15, 2026, about one every 163 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-09-15 | f17c505 | 7,695 B | A | view · diff |
| v1.0.0 | 2026-04-04 | 1693004 | 7,693 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 (7695 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
jnpiyush/agentx · 19 stars · license Apache-2.0 · pushed 2026-11-04 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_du2huz6qjq4cpucn GET https://markdownregistry.com/api/v1/resolve?ref=jnpiyush/agentx/c GET https://markdownregistry.com/api/v1/blob/c41e3d6de2b2111071050771410dae6792ab5c91de4a15e13de620f903e82af2
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.