Agent skill

Decompile Microcode

by cdlewis in cdlewis/snowboardkids2-decomp

A skill your agent uses if you need to decompile a function using F3Dex2 or S2Dex.

No licenceAuto-check passed

Install Decompile Microcode

skills CLI
$ npx skills add cdlewis/snowboardkids2-decomp --skill decompile-microcode -a claude-code

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

GitHub CLI
$ gh skill install cdlewis/snowboardkids2-decomp decompile-microcode --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/cdlewis/snowboardkids2-decomp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/decompile-microcode .claude/skills/decompile-microcode && 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
decompile-microcode
GitHub stars
190
Token cost
~1.5k tokens
SKILL.md length
723 words
Files
3
Skills in repo
7
Repo updated
First seen
Licence
None found

At a glance

A skill your agent uses if you need to decompile a function using F3Dex2 or S2Dex.

  • Works in 3 steps: Nature of the function: F3Dex2 is used… → Disassembly: check if the microcode can… → Look directly at gbi.h and gs2dex.h for…
  • You need to decompile a function using F3Dex2
  • SKILL.md covers Aggregate Macros, S2DEX Data Structures and Compound Commands
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Decompile Microcode is an agent skill from cdlewis/snowboardkids2-decomp. Use this skill if you need to decompile a function using F3Dex2 or S2Dex. The presence of the Gfx type or gRegionAllocPtr are strongly indicative of an F3Dex2 or S2Dex microcode function.

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 (for example `f3dex2-reference.md` and `s2dex-reference.md`).

The repository describes itself as: Decompilation of snowboard kids 2 (N64).

When your agent uses it

  • You need to decompile a function using F3Dex2

Example prompts

  • “/decompile-microcode”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Nature of the function: F3Dex2 is used for 3D objects whereas S2Dex is designed for 2D sprites. Choose the microcode that best reflects…
  2. Disassembly: check if the microcode can only be disassembled into valid F3Dex2 or S2Dex instructions.
  3. Look directly at gbi.h and gs2dex.h for clues.

What it can do on your machine

Read from SKILL.md and the folder at commit 3b1bd5d. 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.

    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

Decompile Microcode loads about 1.5k tokens when it runs. Until then it costs about 52 tokens; SKILL.md has 723 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~52
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 723 words (~1,455 tokens).

“gRegionAllocPtr is indicative of a dynamically constructed Fast3DEX2 or S2Dex display list commands. Display list commands are microcode that are passed to the RSP for rendering. They are all 8 bytes long.”

— opening of SKILL.md by cdlewis
name
decompile-microcode

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files in .codex/skills/decompile-microcode of cdlewis/snowboardkids2-decomp.

  • SKILL.md
  • f3dex2-reference.md
  • s2dex-reference.md

Open the folder on GitHubat commit 3b1bd5d

Compare with similar skills

Decompile Microcode 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.

Decompile Microcode compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Decompile Microcode this skillcdlewis/snowboardkids2-decomp190—~1.5kAutomated safety check: PassNone
Azure Functionsdavila7/claude-code-templates32k2 repos~344Automated safety check: PassMIT
Neon Functionssickn33/agentic-awesome-skills47k1 repos~8.6kAutomated safety check: NotesApache-2.0
GCP Cloud Functionssickn33/agentic-awesome-skills47k2 repos~2.3kAutomated safety check: PassMIT
Securing Serverless Functionsmukul975/Anthropic-Cybersecurity-Skills34k—~3.1kAutomated safety check: PassApache-2.0
Performing Serverless Function Security Reviewmukul975/Anthropic-Cybersecurity-Skills34k—~3.1kAutomated safety check: PassApache-2.0

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More from cdlewis/snowboardkids2-decomp

  • Add Asset To YAML

    cdlewis/snowboardkids2-decomp

    Adding a new asset to snowboardkids2.yaml requires following specific steps to ensure assets are in the correct order and properly declared.

    190 GitHub stars~1.3k tokensUpdated 11 days ago
    Auto-check passed
  • Match Bss Segment

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    Match a segments bss data by replacing extern declarations with the appropriate definitions.

    190 GitHub stars~1.3k tokensUpdated 11 days ago
    Auto-check passed
  • Rename Global Variable Or Function

    cdlewis/snowboardkids2-decomp

    Renaming a global variable or function requires additional steps in decompilation projects or the build will fail.

    190 GitHub stars~454 tokensUpdated 11 days ago
    Auto-check passed
  • Rename A C File Or Header File

    cdlewis/snowboardkids2-decomp

    Renaming a C file or associated header (.h) file requires additional steps in decompilation projects or the build will fail.

    190 GitHub stars~347 tokensUpdated 11 days ago
    Auto-check passed
  • Convert Asset Array

    cdlewis/snowboardkids2-decomp

    Convert arrays with hardcoded pointer addresses to use ROMSTART/ROMEND symbols.

    190 GitHub stars~2.7k tokensUpdated 11 days ago
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  • Match Data File

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    Match data file describes how to add dat asegments to a C file.

    190 GitHub stars~426 tokensUpdated 11 days ago
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Questions about Decompile Microcode

What does Decompile Microcode do?

A skill your agent uses if you need to decompile a function using F3Dex2 or S2Dex. Decompile Microcode is an agent skill from cdlewis/snowboardkids2-decomp. Use this skill if you need to decompile a function using F3Dex2 or S2Dex.

When should I use Decompile Microcode?

Decompile Microcode fits situations like: you need to decompile a function using F3Dex2.

How do I install Decompile Microcode in Claude Code?

Run `npx skills add cdlewis/snowboardkids2-decomp --skill decompile-microcode -a claude-code`. Or copy the skill folder (.codex/skills/decompile-microcode in cdlewis/snowboardkids2-decomp) into .claude/skills/decompile-microcode in your project. Claude Code loads it when a task matches its description.

How do I install Decompile Microcode in Codex?

Run `npx skills add cdlewis/snowboardkids2-decomp --skill decompile-microcode -a codex`. Or copy the skill folder (.codex/skills/decompile-microcode in cdlewis/snowboardkids2-decomp) into .agents/skills/decompile-microcode in your project. Codex loads it when a task matches its description.

Can I use Decompile Microcode 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 cdlewis/snowboardkids2-decomp --skill decompile-microcode -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/decompile-microcode, .gemini/skills/decompile-microcode, .github/skills/decompile-microcode and .opencode/skills/decompile-microcode in your project.

What does Decompile Microcode need to run?

SKILL.md names no scripts, command-line tools or credentials: Decompile Microcode is instructions for the agent only.

Does Decompile Microcode 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 Decompile Microcode 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 Decompile Microcode use?

No licence was found for Decompile Microcode or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Decompile Microcode 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.

What are the alternatives to Decompile Microcode?

Skills that share tags, products or a category with Decompile Microcode: Azure Functions (davila7/claude-code-templates, 32k stars), Neon Functions (sickn33/agentic-awesome-skills, 47k stars), GCP Cloud Functions (sickn33/agentic-awesome-skills, 47k stars) and Securing Serverless Functions (mukul975/Anthropic-Cybersecurity-Skills, 34k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Decompile Microcode?

cdlewis (a GitHub user) maintains it in cdlewis/snowboardkids2-decomp, which has 190 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on September 27, 2026.

Source: cdlewis/snowboardkids2-decomp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.