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Agent skill

Zig Compiler

by mohitmishra786 in mohitmishra786/low-level-dev-skills

Zig compiler skill for systems programming. An agent skill from mohitmishra786/low-level-dev-skills.

MITAuto-check passed

Install Zig Compiler

skills CLI
$ npx skills add mohitmishra786/low-level-dev-skills --skill zig-compiler -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mohitmishra786/low-level-dev-skills zig-compiler --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/zig/zig-compiler .claude/skills/zig-compiler && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
zig-compiler
GitHub stars
253
Token cost
~1.5k tokens
SKILL.md length
380 words
Files
2 (incl. references)
Skills in repo
138
Repo updated
First seen
Licence
MIT

At a glance

Zig compiler skill for systems programming. An agent skill from mohitmishra786/low-level-dev-skills.

  • Works in 8 steps: Basic compilation → Optimization modes → Target specification → …
  • Compiling Zig programs
  • SKILL.md covers Purpose, Triggers, Workflow and Related skills
  • Calls cmake and make

What it does

Zig Compiler is an agent skill from mohitmishra786/low-level-dev-skills. Zig compiler skill for systems programming. Use when compiling Zig programs, selecting optimization modes, using zig cc as a C compiler, reading Zig error messages, or understanding Zig's compilation model. Activates on queries about zig build-exe, zig build-lib, optimize modes, ReleaseSafe, ReleaseFast, ReleaseSmall, zig cc, zig ast-check, or Zig compilation errors.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/zig-optimize-modes.md`).

The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.

When your agent uses it

  • Compiling Zig programs
  • Selecting optimization modes
  • Using zig cc as a C compiler
  • Reading Zig error messages

Example prompts

  • “/zig-compiler”

Workflow steps

8 steps, taken from the step headings in SKILL.md.

  1. Basic compilation
  2. Optimization modes
  3. Target specification
  4. zig cc — C compiler drop-in
  5. Emit formats
  6. AST check and syntax validation
  7. Reading Zig error messages
  8. Version and environment

What it can do on your machine

Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • cmake
    • make

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Zig Compiler loads about 1.5k tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 96 tokens; SKILL.md has 380 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~96
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 380 words, ~1,455 tokens.

Download SKILL.mdSave it as .claude/skills/zig-compiler/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
zig-compiler
description
Zig compiler skill for systems programming. Use when compiling Zig programs, selecting optimization modes, using zig cc as a C compiler, reading Zig error messages, or understanding Zig's compilation model. Activates on queries about zig build-exe, zig build-lib, optimize modes, ReleaseSafe, ReleaseFast, ReleaseSmall, zig cc, zig ast-check, or Zig compilation errors.

Zig Compiler

Purpose

Guide agents through Zig compiler invocation: optimization modes, output types, zig cc as a C compiler drop-in, error message interpretation, and the Zig compilation pipeline.

Triggers

  • "How do I compile a Zig program?"
  • "What are Zig's optimization modes and when do I use each?"
  • "How do I use zig cc to compile C code?"
  • "How do I read Zig error messages?"
  • "How do I compile a Zig library?"
  • "What is zig ast-check?"

Workflow

1. Basic compilation
bash
# Compile and run a single file
zig run src/main.zig

# Compile to executable
zig build-exe src/main.zig

# Compile to static library
zig build-lib src/mylib.zig

# Compile to shared library
zig build-lib src/mylib.zig -dynamic

# Compile to object file
zig build-obj src/main.zig

# Output name
zig build-exe src/main.zig -femit-bin=myapp
2. Optimization modes
ModeFlag-O equivPurpose
Debug (default)-O Debug-O0 -gFast compile, all safety checks, debug info
ReleaseSafe-O ReleaseSafe-O2 + checksOptimized with safety checks retained
ReleaseFast-O ReleaseFast-O3Maximum speed, safety checks removed
ReleaseSmall-O ReleaseSmall-OsMinimize binary size
bash
zig build-exe src/main.zig -O Debug        # dev builds
zig build-exe src/main.zig -O ReleaseSafe  # production with safety
zig build-exe src/main.zig -O ReleaseFast  # max performance
zig build-exe src/main.zig -O ReleaseSmall # embedded/WASM

Safety checks in Debug and ReleaseSafe:

  • Integer overflow → detected and panics with source location
  • Array bounds checking → panics on OOB
  • Null pointer dereference → panic (not crash)
  • unreachable → panic
  • Enum tag validation → panic on bad cast

ReleaseFast: turns safety checks into undefined behaviour (same semantics as C -O3). Use only when you've validated with ReleaseSafe first.

3. Target specification
bash
# List all supported targets
zig targets

# Cross-compile for specific target
zig build-exe src/main.zig \
    -target aarch64-linux-gnu \
    -O ReleaseFast

# Embedded (no OS)
zig build-exe src/main.zig \
    -target thumb-freestanding-eabi \
    -O ReleaseSmall

# WebAssembly
zig build-exe src/main.zig \
    -target wasm32-freestanding \
    -O ReleaseSmall \
    --export=main

# Common target triples: cpu-os-abi
# x86_64-linux-gnu, x86_64-windows-gnu, aarch64-macos-none
# thumbv7m-freestanding-eabi, wasm32-wasi, wasm32-freestanding
4. zig cc — C compiler drop-in

Zig ships a C/C++ compiler (zig cc / zig c++) backed by Clang and musl. It is hermetic — no system libc required.

bash
# Compile C code
zig cc -O2 -Wall main.c -o myapp

# Compile C++ code
zig c++ -std=c++17 -O2 main.cpp -o myapp

# Cross-compile C for ARM (no cross toolchain needed!)
zig cc -target aarch64-linux-gnu -O2 main.c -o myapp-arm

# Statically link with musl
zig cc -target x86_64-linux-musl main.c -o myapp-static

# Use in CMake (override compiler)
CC="zig cc" CXX="zig c++" cmake -S . -B build
cmake --build build

# Use in Makefile
CC="zig cc" make

zig cc advantages over gcc/clang:

  • No system toolchain required (fully hermetic)
  • Built-in cross-compilation for any supported target
  • Always ships with a recent clang version
  • musl libc bundled for static Linux builds
Show full SKILL.md (138 more words)Show less
5. Emit formats
bash
# Emit LLVM IR
zig build-exe src/main.zig --emit-llvm-ir

# Emit assembly
zig build-exe src/main.zig --emit-asm
cat main.s

# Emit binary and assembly
zig build-exe src/main.zig -femit-bin=myapp -femit-asm=myapp.s
6. AST check and syntax validation
bash
# Check syntax without compiling
zig ast-check src/main.zig

# Format code
zig fmt src/main.zig
zig fmt src/          # format entire directory

# Check formatting without modifying
zig fmt --check src/

# Tokenize (debugging zig fmt)
zig tokenize src/main.zig
7. Reading Zig error messages

Zig error messages include:

  • Source file and line
  • Column indicator with arrow
  • Note messages for context
src/main.zig:10:5: error: expected type 'u32', found 'i32'
    x: i32 = 5,
    ^
src/main.zig:7:5: note: struct field 'x' declared here
    x: u32,
    ^

Key error patterns:

ErrorMeaning
error: expected type 'X', found 'Y'Type mismatch
error: use of undeclared identifier 'X'Missing import or typo
error: integer overflowComptime overflow (caught at compile)
error: cannot assign to constantMutating a const variable
error: unused variable 'x'All variables must be used
error: unused function parameter 'x'Use _ = x; to suppress

Suppress "unused" errors:

zig
_ = unused_variable;  // explicitly discard
8. Version and environment
bash
# Check Zig version
zig version

# Show build configuration
zig env

# Show standard library location
zig env | grep lib_dir

For optimization mode details and target triple reference, see references/zig-optimize-modes.md.

  • Use skills/zig/zig-build-system for multi-file projects with build.zig
  • Use skills/zig/zig-cinterop for calling C from Zig and vice versa
  • Use skills/zig/zig-cross for cross-compilation targets and sysroots
  • Use skills/zig/zig-debugging for GDB/LLDB with Zig binaries

© mohitmishra786, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/zig/zig-compiler of mohitmishra786/low-level-dev-skills.

  • SKILL.md
  • references/zig-optimize-modes.md

Open the folder on GitHubat commit bdc5847

Compare with similar skills

Zig Compiler next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Zig Compiler compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Zig Compiler this skillmohitmishra786/low-level-dev-skills253—~1.5kAutomated safety check: PassMIT
Select Namethedaviddias/Front-End-Checklist74k—~451Automated safety check: PassMIT
Engine Selectionsickn33/agentic-awesome-skills47k1 repos~1.2kAutomated safety check: PassMIT
Compile Knowledgesickn33/agentic-awesome-skills47k1 repos~2.3kAutomated safety check: PassMIT
Compileratopile/atopile4k—~1kAutomated safety check: PassMIT
Strict Programming Practicescode-yeongyu/oh-my-openagent70k—~9.5kAutomated safety check: PassCustom licence

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Questions about Zig Compiler

What does Zig Compiler do?

Zig compiler skill for systems programming. An agent skill from mohitmishra786/low-level-dev-skills. Zig Compiler is an agent skill from mohitmishra786/low-level-dev-skills. Zig compiler skill for systems programming.

When should I use Zig Compiler?

Zig Compiler fits situations like: compiling Zig programs; selecting optimization modes; using zig cc as a C compiler; reading Zig error messages.

How do I install Zig Compiler in Claude Code?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill zig-compiler -a claude-code`. Or copy the skill folder (skills/zig/zig-compiler in mohitmishra786/low-level-dev-skills) into .claude/skills/zig-compiler in your project. Claude Code loads it when a task matches its description.

How do I install Zig Compiler in Codex?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill zig-compiler -a codex`. Or copy the skill folder (skills/zig/zig-compiler in mohitmishra786/low-level-dev-skills) into .agents/skills/zig-compiler in your project. Codex loads it when a task matches its description.

Can I use Zig Compiler in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill zig-compiler -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/zig-compiler, .gemini/skills/zig-compiler, .github/skills/zig-compiler and .opencode/skills/zig-compiler in your project.

What does Zig Compiler need to run?

Going by SKILL.md and its folder, Zig Compiler needs the command-line tools its instructions call (cmake and make).

Does Zig Compiler access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Zig Compiler safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Zig Compiler use?

Zig Compiler is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Zig Compiler use?

About 1.5k tokens (SKILL.md is roughly 5.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.1k tokens, read only when the agent opens those files.

What are the alternatives to Zig Compiler?

Skills that share tags, products or a category with Zig Compiler: Select Name (thedaviddias/Front-End-Checklist, 74k stars), Engine Selection (sickn33/agentic-awesome-skills, 47k stars), Compile Knowledge (sickn33/agentic-awesome-skills, 47k stars) and Compiler (atopile/atopile, 4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Zig Compiler?

mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 253 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.

Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.