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ABI and calling conventions skill for cross-language boundaries.
MITAuto-check passed
Install Abi And Calling Conventions
$ npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills abi-and-calling-conventions --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/computer-architecture/abi-and-calling-conventions .claude/skills/abi-and-calling-conventions && rm -rf skills-srcUse ~/.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/
Install the "abi-and-calling-conventions" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventions into .claude/skills/abi-and-calling-conventions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abi-and-calling-conventions", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventionsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills abi-and-calling-conventions --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/computer-architecture/abi-and-calling-conventions .agents/skills/abi-and-calling-conventions && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "abi-and-calling-conventions" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventions into .agents/skills/abi-and-calling-conventions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abi-and-calling-conventions", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills abi-and-calling-conventions --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/computer-architecture/abi-and-calling-conventions .cursor/skills/abi-and-calling-conventions && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "abi-and-calling-conventions" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventions into .cursor/skills/abi-and-calling-conventions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abi-and-calling-conventions", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mohitmishra786/low-level-dev-skills.git --path skills/computer-architecture/abi-and-calling-conventions--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills abi-and-calling-conventions --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/computer-architecture/abi-and-calling-conventions .gemini/skills/abi-and-calling-conventions && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "abi-and-calling-conventions" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventions into .gemini/skills/abi-and-calling-conventions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abi-and-calling-conventions", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mohitmishra786/low-level-dev-skills abi-and-calling-conventionsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/computer-architecture/abi-and-calling-conventions .github/skills/abi-and-calling-conventions && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "abi-and-calling-conventions" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventions into .github/skills/abi-and-calling-conventions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abi-and-calling-conventions", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills abi-and-calling-conventions --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/computer-architecture/abi-and-calling-conventions .opencode/skills/abi-and-calling-conventions && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "abi-and-calling-conventions" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/computer-architecture/abi-and-calling-conventions into .opencode/skills/abi-and-calling-conventions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abi-and-calling-conventions", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
abi-and-calling-conventions- GitHub stars
- 252
- Token cost
- ~830 tokens
- SKILL.md length
- 277 words
- Files
- 1
- Skills in repo
- 138
- Repo updated
- First seen
- Licence
- MIT
At a glance
ABI and calling conventions skill for cross-language boundaries.
- Works in 7 steps: System V AMD64 (Linux/macOS) → ARM AAPCS (AArch32/AArch64) → RISC-V psABI (RV64) → …
- Explaining System V AMD64
- SKILL.md covers Purpose, When to Use, Workflow and Common Problems, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Abi And Calling Conventions is an agent skill from mohitmishra786/low-level-dev-skills. ABI and calling conventions skill for cross-language boundaries. Use when explaining System V AMD64, ARM AAPCS, RISC-V psABI, stack frames, variadic calls, or FFI register rules. Activates on queries about calling convention, ABI, System V AMD64, AAPCS, stack frame, variadic function, or FFI registers.
Its SKILL.md is about 830 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with Rust. 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
- Explaining System V AMD64
- FFI register rules
Example prompts
- “/abi-and-calling-conventions”
Workflow steps
7 steps, taken from the step headings in SKILL.md.
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
No scripts in the folder and no shell commands in SKILL.md (its code samples are c and bash).
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
Abi And Calling Conventions loads about 830 tokens when it runs. Until then it costs about 83 tokens; SKILL.md has 277 words of instructions outside code blocks.
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). 277 words, ~830 tokens.
Download SKILL.mdSave it as
.claude/skills/abi-and-calling-conventions/SKILL.md (or your agent's skills folder).- name
- abi-and-calling-conventions
- description
- ABI and calling conventions skill for cross-language boundaries. Use when explaining System V AMD64, ARM AAPCS, RISC-V psABI, stack frames, variadic calls, or FFI register rules. Activates on queries about calling convention, ABI, System V AMD64, AAPCS, stack frame, variadic function, or FFI registers.
ABI and Calling Conventions
Purpose
Document application binary interface (ABI) rules: register roles, stack alignment, argument passing, return values, and variadic conventions across System V AMD64, ARM AAPCS, and RISC-V — essential for assembly, FFI, and debugging.
When to Use
- Writing assembly thunks or inline asm clobbers
- Debugging corrupted stack in mixed C/asm
- FFI between Rust/C/Zig (
skills/rust/rust-ffi,skills/zig/zig-cinterop) - Reading disassembly from
skills/debuggers/gdb
Workflow
1. System V AMD64 (Linux/macOS)
| Item | Rule |
|---|---|
| Integer args | rdi, rsi, rdx, rcx, r8, r9 |
| XMM args | xmm0–xmm7 (float) |
| Return int/ptr | rax (+ rdx for 128-bit) |
| Stack alignment | 16-byte before call |
| Red zone | 128 bytes below rsp (Linux) |
| Callee-saved | rbx, rbp, r12–r15 |
/* void foo(int a, int b, int c, int d, int e, int f, int g); */
/* a–f in regs, g on stack */Windows x64 differs — see skills/compilers/msvc-cl.
2. ARM AAPCS (AArch32/AArch64)
AArch64:
| Item | Rule |
|---|---|
| Integer args | x0–x7 |
| Float args | v0–v7 |
| Return | x0/x1 or v0 |
| Stack align | 16-byte |
| Callee-saved | x19–x28, fp (x29), lr (x30) |
Thumb interworking: LSB of function pointer set for Thumb code.
See skills/low-level-programming/assembly-arm.
3. RISC-V psABI (RV64)
| Item | Rule |
|---|---|
| Integer args | a0–a7 |
| Callee-saved | s0–s11, sp |
| Return | a0, a1 |
| Stack align | 16-byte |
See skills/low-level-programming/assembly-riscv.
4. Stack frame layout (conceptual)
high addresses
├── return address
├── saved frame pointer
├── local variables
├── spill slots / alignment padding
└── outgoing args (if any)
low addresses (rsp)5. Variadic functions
System V: al holds number of vector args used; register_save_area on stack for va_start. Prefer typed wrappers over raw va_arg in portable FFI.
6. Verify in compiler output
gcc -O2 -S -o - foo.c # study .cfi_* and mov args
objdump -d -M intel ./a.out7. Agent usage
/abi-and-calling-conventions Which registers hold args 5–8 in AArch64 for my C function?Common Problems
| Symptom | Cause | Fix |
|---|---|---|
Crash on call | Stack misaligned | Align rsp mod 16 |
| Wrong float arg | XMM vs GPR mismatch | Match prototype |
| Corrupt callee-saved | Asm clobber missing | List in clobber or save |
| FFI garbage | Windows vs SysV mix | Match toolchain ABI |
| Variadic UB | Wrong type to va_arg | Cast to promoted type |
Related Skills
skills/low-level-programming/assembly-x86— x86-64 asmskills/low-level-programming/assembly-arm— AAPCS examplesskills/low-level-programming/assembly-riscv— RISC-V asmskills/rust/rust-ffi—extern "C"guaranteesskills/binaries/elf-inspection— symbol and relocation views
© 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
Just SKILL.md in skills/computer-architecture/abi-and-calling-conventions of mohitmishra786/low-level-dev-skills.
Open the folder on GitHubat commit bdc5847
Compare with similar skills
Abi And Calling Conventions 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Abi And Calling Conventions this skillmohitmishra786/low-level-dev-skills | 252 | — | ~830 | Automated safety check: Pass | MIT | |
| Update V8 Versionopeninterpreter/openinterpreter | 69k | 2 repos | ~845 | Automated safety check: Pass | Apache-2.0 | |
| Firecrawl Page Scrape Integrationfirecrawl/firecrawl | 190k | 1 repos | ~944 | Automated safety check: Pass | ISC | |
| Migrate Core Code to Submodulestinyhumansai/openhuman | 42k | — | ~2.6k | Automated safety check: Pass | GPL-3.0 | |
| Rust TDD Workflowrtk-ai/rtk | 83k | — | ~753 | Automated safety check: Notes | Apache-2.0 | |
| OpenLogi macOS Permissions TriageAprilNEA/OpenLogi | 23k | — | ~2.5k | Automated safety check: Notes | Apache-2.0 |
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Related
Works with
Questions about Abi And Calling Conventions
What does Abi And Calling Conventions do?
ABI and calling conventions skill for cross-language boundaries. Abi And Calling Conventions is an agent skill from mohitmishra786/low-level-dev-skills. ABI and calling conventions skill for cross-language boundaries.
When should I use Abi And Calling Conventions?
Abi And Calling Conventions fits situations like: explaining System V AMD64; FFI register rules.
How do I install Abi And Calling Conventions in Claude Code?
Run `npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a claude-code`. Or copy the skill folder (skills/computer-architecture/abi-and-calling-conventions in mohitmishra786/low-level-dev-skills) into .claude/skills/abi-and-calling-conventions in your project. Claude Code loads it when a task matches its description.
How do I install Abi And Calling Conventions in Codex?
Run `npx skills add mohitmishra786/low-level-dev-skills --skill abi-and-calling-conventions -a codex`. Or copy the skill folder (skills/computer-architecture/abi-and-calling-conventions in mohitmishra786/low-level-dev-skills) into .agents/skills/abi-and-calling-conventions in your project. Codex loads it when a task matches its description.
Can I use Abi And Calling Conventions 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 abi-and-calling-conventions -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/abi-and-calling-conventions, .gemini/skills/abi-and-calling-conventions, .github/skills/abi-and-calling-conventions and .opencode/skills/abi-and-calling-conventions in your project.
What does Abi And Calling Conventions need to run?
SKILL.md names no scripts, command-line tools or credentials: Abi And Calling Conventions is instructions for the agent only.
Does Abi And Calling Conventions 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 Abi And Calling Conventions 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 Abi And Calling Conventions use?
Abi And Calling Conventions 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 Abi And Calling Conventions use?
About 830 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Abi And Calling Conventions?
Skills that share tags, products or a category with Abi And Calling Conventions: Update V8 Version (openinterpreter/openinterpreter, 69k stars), Firecrawl Page Scrape Integration (firecrawl/firecrawl, 190k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars) and Rust TDD Workflow (rtk-ai/rtk, 83k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Abi And Calling Conventions?
mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 252 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.