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Agent skill

Masm Explicit Stack Interface

by 0xMiden in 0xMiden/protocol

A skill your agent uses when defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces.

MITAuto-check passedDevelopment

Install Masm Explicit Stack Interface

skills CLI
$ npx skills add 0xMiden/protocol --skill masm-explicit-stack-interface -a claude-code

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

GitHub CLI
$ gh skill install 0xMiden/protocol masm-explicit-stack-interface --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/0xMiden/protocol.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/masm-explicit-stack-interface .claude/skills/masm-explicit-stack-interface && 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
masm-explicit-stack-interface
GitHub stars
133
Token cost
~716 tokens
SKILL.md length
267 words
Files
1
Skills in repo
34
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces.

  • Defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces
  • SKILL.md covers Inputs: pass on the stack, Outputs: return only produced… and Examples
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Masm Explicit Stack Interface is an agent skill from 0xMiden/protocol. Use when defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces.

Its SKILL.md is about 720 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development. It works with Rust. The repository describes itself as: Core components of the Miden protocol. The licence is MIT.

When your agent uses it

  • Defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces

Example prompts

  • “/masm-explicit-stack-interface”

What it can do on your machine

Read from SKILL.md and the folder at commit 3a8215e. 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 masm).

    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

Masm Explicit Stack Interface loads about 716 tokens when it runs. Until then it costs about 43 tokens; SKILL.md has 267 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~43
When it runs · the whole SKILL.md, loaded when a task matches
~716

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 0xMiden/protocol at commit 3a8215e, republished under its MIT licence (© 0xMiden). 267 words, ~716 tokens.

Download SKILL.mdSave it as .claude/skills/masm-explicit-stack-interface/SKILL.md (or your agent's skills folder).
name
masm-explicit-stack-interface
description
Use when defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces.

Keep MASM Procedure Interfaces Explicit

Inputs: pass on the stack

A MASM procedure's inputs should arrive on the stack, named in its Inputs: doc block. Do not design a procedure that reads its inputs from a fixed memory location that the caller must populate beforehand.

Use memory I/O only when:

  • The data has a fixed canonical home (account storage, kernel inputs, advice-keyed regions).
  • The data is too large to keep on the stack (a full Merkle proof, a large vector).

For everything else — counts, indices, single words, small structs — pass on the stack.

Why

Hidden memory inputs make the procedure's signature a lie — a reader of Inputs: [ptr] can't tell what's behind the pointer or what the caller had to set up, and the real contract drifts out of sync in prose. Stack inputs are typed by the doc, testable in isolation, and trap if the shape is wrong.

Outputs: return only produced values

A procedure's Outputs: carry only values the procedure computes. An input the procedure consumes unchanged is dropped inside the procedure; a caller that still needs it dups it before the call. A modified input (an advanced pointer, a decremented counter) is a produced value and may be returned.

Why

Rust code calls MASM procedures through generated bindings that follow the C ABI: every return value is written to memory through a pointer. An echoed input costs that store on every Rust call, while the Rust caller already holds its own copy of the parameter (see #1717). The few cycles a MASM caller saves by reusing an echoed value do not outweigh this.

Examples

masm
# Good
#! Inputs:  [ASSET_ID, ASSET_VALUE, note_idx]
#! Outputs: []
pub proc add_asset(asset: Asset, note_idx: u16)
    # ... uses values directly from the stack
end

# Bad: implicit input via memory location the caller had to populate
#! Inputs:  []
#! Outputs: []
pub proc add_asset
    mem_load.PENDING_NOTE_PTR    # caller had to set this first
    mem_loadw.PENDING_ASSET_PTR
    # ...
end

# Bad: echoes its inputs back to the caller
#! Inputs:  [ASSET_ID, ASSET_VALUE, note_idx]
#! Outputs: [ASSET_ID, ASSET_VALUE, note_idx]
pub proc add_asset(asset: Asset, note_idx: u16) -> (Asset, u16)
    # ...
end

# OK: the exception — data too large for the stack lives in memory, and the
# pointer to it is an explicit stack input named in the doc block
#! Inputs:  [proof_ptr, leaf_index, ROOT]
#! Outputs: [is_valid]
proc verify_merkle_proof
    # the full proof (many words) was written to memory by the caller;
    # only the pointer, index, and root travel on the stack
    # ...
end

© 0xMiden, 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 .claude/skills/masm-explicit-stack-interface of 0xMiden/protocol.

Open the folder on GitHubat commit 3a8215e

Compare with similar skills

Masm Explicit Stack Interface 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.

Masm Explicit Stack Interface compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Masm Explicit Stack Interface this skill0xMiden/protocol133—~716Automated safety check: PassMIT
Migrate Core Code to Submodulestinyhumansai/openhuman41k—~2.6kAutomated safety check: PassGPL-3.0
Rust Best Practicesfarm-fe/farm5.6k3 repos~1.1kAutomated safety check: PassMIT
OpenLogi macOS Permissions TriageAprilNEA/OpenLogi23k—~2.5kAutomated safety check: NotesApache-2.0
RTK Rust Design Patternsrtk-ai/rtk83k—~1.9kAutomated safety check: PassApache-2.0
Release Skillsnexmoe/eve4213 repos~3.3kAutomated safety check: PassNone

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  • Advice Provider Hygiene

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  • Conversion Method Naming

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Works with

Categories

Questions about Masm Explicit Stack Interface

What does Masm Explicit Stack Interface do?

A skill your agent uses when defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces. Masm Explicit Stack Interface is an agent skill from 0xMiden/protocol. Use when defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces.

When should I use Masm Explicit Stack Interface?

Masm Explicit Stack Interface fits situations like: defining the interface for a new MASM procedure — keep its inputs explicit on the stack and its outputs limited to values it produces.

How do I install Masm Explicit Stack Interface in Claude Code?

Run `npx skills add 0xMiden/protocol --skill masm-explicit-stack-interface -a claude-code`. Or copy the skill folder (.claude/skills/masm-explicit-stack-interface in 0xMiden/protocol) into .claude/skills/masm-explicit-stack-interface in your project. Claude Code loads it when a task matches its description.

How do I install Masm Explicit Stack Interface in Codex?

Run `npx skills add 0xMiden/protocol --skill masm-explicit-stack-interface -a codex`. Or copy the skill folder (.claude/skills/masm-explicit-stack-interface in 0xMiden/protocol) into .agents/skills/masm-explicit-stack-interface in your project. Codex loads it when a task matches its description.

Can I use Masm Explicit Stack Interface 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 0xMiden/protocol --skill masm-explicit-stack-interface -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/masm-explicit-stack-interface, .gemini/skills/masm-explicit-stack-interface, .github/skills/masm-explicit-stack-interface and .opencode/skills/masm-explicit-stack-interface in your project.

What does Masm Explicit Stack Interface need to run?

SKILL.md names no scripts, command-line tools or credentials: Masm Explicit Stack Interface is instructions for the agent only.

Does Masm Explicit Stack Interface 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 Masm Explicit Stack Interface 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 Masm Explicit Stack Interface use?

Masm Explicit Stack Interface 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 Masm Explicit Stack Interface use?

About 716 tokens (SKILL.md is roughly 2.9k 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 Masm Explicit Stack Interface?

Skills that share tags, products or a category with Masm Explicit Stack Interface: Migrate Core Code to Submodules (tinyhumansai/openhuman, 41k stars), Rust Best Practices (farm-fe/farm, 5.6k stars), OpenLogi macOS Permissions Triage (AprilNEA/OpenLogi, 23k stars) and RTK Rust Design Patterns (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 Masm Explicit Stack Interface?

0xMiden (a GitHub organization) maintains it in 0xMiden/protocol, which has 133 GitHub stars. The repository holds 34 skills in this directory. The repository was last updated on October 6, 2026.

Source: 0xMiden/protocol on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.