Parallel build orchestrator for SystemVerilog creation tasks.

Custom licenceAuto-check: notesDevelopment

Install Gf Build

skills CLI
$ npx skills add codejunkie99/Gateflow-Plugin --skill gf-build -a claude-code

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

GitHub CLI
$ gh skill install codejunkie99/Gateflow-Plugin gf-build --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/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/gateflow/skills/gf-build .claude/skills/gf-build && 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
gf-build
GitHub stars
117
Token cost
~1.9k tokens
SKILL.md length
399 words
Files
1
Skills in repo
25
Repo updated
First seen
Licence
Custom licence

At a glance

Parallel build orchestrator for SystemVerilog creation tasks.

  • Works in 4 steps: Decompose → Ask for Approval → Execute Phases → …
  • Development work in your project
  • SKILL.md covers Invocation, Workflow, Agent Prompt Templates and Requirements, plus 9 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Gf Build is an agent skill from codejunkie99/Gateflow-Plugin. Parallel build orchestrator for SystemVerilog creation tasks. Decomposes designs into independent modules, builds in parallel phases, runs verification on each component, then integrates. Example: "/gf-build RISC-V CPU with ALU, regfile, decoder, control FSM"

Its SKILL.md is about 1.9k 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. The repository describes itself as: AI-powered SystemVerilog development assistant — design, verify, debug, and deliver working RTL with natural language.

When your agent uses it

  • Development work in your project

Example prompts

  • “/gf-build RISC-V CPU with ALU, regfile, decoder, control FSM”
  • “/gf-build”

Requirements

  • Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash, Task, Skill, AskUserQuestion

Workflow steps

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

  1. Decompose
  2. Ask for Approval
  3. Execute Phases
  4. Report

What it can do on your machine

Read from SKILL.md and the folder at commit bf7e94c. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Glob
    • Grep
    • Bash
    • Task
    • Skill
    • AskUserQuestion

    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 markdown, bash and json).

    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

Gf Build loads about 1.9k tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 399 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~67
When it runs · the whole SKILL.md, loaded when a task matches
~1.9k

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Write, Edit, Glob, Grep, Bash, Task, Skill, AskUserQuestion

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 399 words (~1,850 tokens).

“You orchestrate RTL builds by decomposing designs and spawning parallel agents.”

— opening of SKILL.md by codejunkie99, Custom licence
name
gf-build
allowed-tools
Read, Write, Edit, Glob, Grep, Bash, Task, Skill, AskUserQuestion

Read the full SKILL.md on GitHub

Files

Just SKILL.md in plugins/gateflow/skills/gf-build of codejunkie99/Gateflow-Plugin.

Open the folder on GitHubat commit bf7e94c

Compare with similar skills

Gf Build 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.

Gf Build compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Gf Build this skillcodejunkie99/Gateflow-Plugin117—~1.9kAutomated safety check: NotesCustom licence
Trellis Session Insightmindfold-ai/Trellis15k4 repos~1.7kAutomated safety check: PassAGPL-3.0
Openspec Verify ChangeFission-AI/OpenSpec71k2 repos~4.6kAutomated safety check: PassMIT
Warp Factory Fileswarpdotdev/warp65k1 repos~2.5kAutomated safety check: PassAGPL-3.0
Migrate Core Code to Submodulestinyhumansai/openhuman42k—~2.6kAutomated safety check: PassGPL-3.0
Analyze Logsactivepieces/activepieces25k1 repos~1.6kAutomated safety check: PassMIT

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All 25 skills in this repo
  • Gf Architect

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  • Gf Fusesoc

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    Auto-check passed
  • Gf Learn

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    117 GitHub stars~1.3k tokensUpdated 21 days ago
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  • Gf Release

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  • Gf Router

    codejunkie99/Gateflow-Plugin

    Figures out what kind of digital hardware design task the user wants to do, then hands off to the right specialist.

    117 GitHub stars~3.3k tokensUpdated 21 days ago
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  • Gf Summary

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    Summarize Verilator, lint, or simulation output into a readable, actionable format.

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Questions about Gf Build

What does Gf Build do?

Parallel build orchestrator for SystemVerilog creation tasks. Gf Build is an agent skill from codejunkie99/Gateflow-Plugin. Parallel build orchestrator for SystemVerilog creation tasks.

When should I use Gf Build?

Gf Build fits situations like: development work in your project.

How do I install Gf Build in Claude Code?

Run `npx skills add codejunkie99/Gateflow-Plugin --skill gf-build -a claude-code`. Or copy the skill folder (plugins/gateflow/skills/gf-build in codejunkie99/Gateflow-Plugin) into .claude/skills/gf-build in your project. Claude Code loads it when a task matches its description.

How do I install Gf Build in Codex?

Run `npx skills add codejunkie99/Gateflow-Plugin --skill gf-build -a codex`. Or copy the skill folder (plugins/gateflow/skills/gf-build in codejunkie99/Gateflow-Plugin) into .agents/skills/gf-build in your project. Codex loads it when a task matches its description.

Can I use Gf Build 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 codejunkie99/Gateflow-Plugin --skill gf-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gf-build, .gemini/skills/gf-build, .github/skills/gf-build and .opencode/skills/gf-build in your project.

What does Gf Build need to run?

SKILL.md names no scripts, command-line tools or credentials: Gf Build is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash, Task, Skill, AskUserQuestion.

Does Gf Build 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 Gf Build safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Gf Build use?

Gf Build has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Gf Build use?

About 1.9k tokens (SKILL.md is roughly 7.4k 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 Gf Build?

Skills that share tags, products or a category with Gf Build: Trellis Session Insight (mindfold-ai/Trellis, 15k stars), Openspec Verify Change (Fission-AI/OpenSpec, 71k stars), Warp Factory Files (warpdotdev/warp, 65k stars) and Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Gf Build?

codejunkie99 (a GitHub user) maintains it in codejunkie99/Gateflow-Plugin, which has 117 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on September 16, 2026.

Source: codejunkie99/Gateflow-Plugin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.