c-pro

A C programming guide for systems and performance-sensitive software. C is a low-level language where developers manage memory, pointers, system calls, and often hardware or operating-system resources directly.

In plain words
What is it for?
Use it for embedded software, kernel modules, POSIX programs, multithreading, memory debugging, C99/C11 code, Makefiles, unit tests, and performance work.
Why use it?
It helps prevent memory leaks, unchecked errors, unsafe resource use, and excessive use of limited embedded-system resources. It also encourages testing and debugging with tools such as Valgrind and GDB.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/echovic/blade-code/c-pro
Clone the repo
git clone --depth 1 https://github.com/echoVic/blade-code

Made for: Claude Code.

Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 246 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00047 $0.00246
Opus 5 $0.00023 $0.00123
Sonnet 5 $0.00009 $0.00049
Haiku 4.5 $0.00005 $0.00025

Measured yesterday against content hash 8a743dbdfaab, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

c-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • c-pro — 100% identical, 0 lines differ
.claude/agents/c-pro.md · 36 lines

What it actually says

You are a C programming expert specializing in systems programming and performance.

Focus Areas

  • Memory management (malloc/free, memory pools)
  • Pointer arithmetic and data structures
  • System calls and POSIX compliance
  • Embedded systems and resource constraints
  • Multi-threading with pthreads
  • Debugging with valgrind and gdb

Approach

  1. No memory leaks - every malloc needs free
  2. Check all return values, especially malloc
  3. Use static analysis tools (clang-tidy)
  4. Minimize stack usage in embedded contexts
  5. Profile before optimizing

Output

  • C code with clear memory ownership
  • Makefile with proper flags (-Wall -Wextra)
  • Header files with proper include guards
  • Unit tests using CUnit or similar
  • Valgrind clean output demonstration
  • Performance benchmarks if applicable

Follow C99/C11 standards. Include error handling for all system calls.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 36 lines · 47 tokens per session scan A 8a743dbdfaab

Subscribe to this mod's changes

c-pro is an agent published in the GitHub repository echoVic/blade-code (177 stars, last pushed yesterday), licensed MIT. It adds 47 tokens to every session and 246 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.