Planning With Files
jarrodwatts/claude-code-config
Transforms workflow to use Manus-style persistent markdown files for planning, progress tracking, and knowledge storage.
SystemVerilog simulator with structured output for orchestration.
Install Gf Sim
$ npx skills add codejunkie99/Gateflow-Plugin --skill gf-sim -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install codejunkie99/Gateflow-Plugin gf-sim --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/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/gateflow/skills/gf-sim .claude/skills/gf-sim && 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 "gf-sim" agent skill from https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim into .claude/skills/gf-sim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gf-sim", 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/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-simType 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 codejunkie99/Gateflow-Plugin --skill gf-sim -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install codejunkie99/Gateflow-Plugin gf-sim --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/gateflow/skills/gf-sim .agents/skills/gf-sim && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "gf-sim" agent skill from https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim into .agents/skills/gf-sim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gf-sim", 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 codejunkie99/Gateflow-Plugin --skill gf-sim -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install codejunkie99/Gateflow-Plugin gf-sim --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/gateflow/skills/gf-sim .cursor/skills/gf-sim && 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 "gf-sim" agent skill from https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim into .cursor/skills/gf-sim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gf-sim", 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/codejunkie99/Gateflow-Plugin.git --path plugins/gateflow/skills/gf-sim--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 codejunkie99/Gateflow-Plugin --skill gf-sim -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install codejunkie99/Gateflow-Plugin gf-sim --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/gateflow/skills/gf-sim .gemini/skills/gf-sim && 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 "gf-sim" agent skill from https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim into .gemini/skills/gf-sim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gf-sim", 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 codejunkie99/Gateflow-Plugin gf-simInstalls 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 codejunkie99/Gateflow-Plugin --skill gf-sim -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/gateflow/skills/gf-sim .github/skills/gf-sim && 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 "gf-sim" agent skill from https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim into .github/skills/gf-sim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gf-sim", 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 codejunkie99/Gateflow-Plugin --skill gf-sim -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install codejunkie99/Gateflow-Plugin gf-sim --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/codejunkie99/Gateflow-Plugin.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/gateflow/skills/gf-sim .opencode/skills/gf-sim && 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 "gf-sim" agent skill from https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim into .opencode/skills/gf-sim/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gf-sim", 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
gf-sim- GitHub stars
- 117
- Token cost
- ~1.7k tokens
- SKILL.md length
- 414 words
- Files
- 1
- Skills in repo
- 26
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
SystemVerilog simulator with structured output for orchestration.
- Works in 9 steps: Identify Files → Classify Files: DUT vs Testbench → Compile with Verilator → …
- Tasks that involve Structured output and tool calling
- SKILL.md covers Tool Detection, Instructions, Common Issues and Solutions and Verilator v5 Performance Options, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Gf Sim is an agent skill from codejunkie99/Gateflow-Plugin. SystemVerilog simulator with structured output for orchestration. Auto-detects DUT vs testbench, compiles with Verilator, runs simulation, and returns a parseable result block for /gf orchestration.
Its SKILL.md is about 1.7k 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 AI & LLM Engineering, covering Structured output and tool calling. 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
- Tasks that involve Structured output and tool calling
Example prompts
- “/gf-sim”
Requirements
- Pre-approved tools (allowed-tools): Bash, Read, Glob, Grep
Workflow steps
9 steps, taken from the step headings in SKILL.md.
- Identify Files
- Classify Files: DUT vs Testbench
- Compile with Verilator
- Run Simulation
- Parse Results
- Return Structured Result
- Example: Successful Run
- Example: Failed Run
- Example: Compile Error
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:
BashReadGlobGrep
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 bash and systemverilog).
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 Sim loads about 1.7k tokens when it runs. Until then it costs about 51 tokens; SKILL.md has 414 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteRuns commands with sudoSKILL.md:34
Linux: sudo apt install verilator - NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Bash, Read, Glob, Grep
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 414 words (~1,675 tokens).
“Compile and run SystemVerilog simulation with structured output.”
- name
- gf-sim
- allowed-tools
- Bash, Read, Glob, Grep
Files
Just SKILL.md in plugins/gateflow/skills/gf-sim of codejunkie99/Gateflow-Plugin.
Open the folder on GitHubat commit bf7e94c
Compare with similar skills
Gf Sim 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 |
|---|---|---|---|---|---|---|
| Gf Sim this skillcodejunkie99/Gateflow-Plugin | 117 | — | ~1.7k | Automated safety check: Notes | Custom licence | |
| Planning With Filesjarrodwatts/claude-code-config | 1.1k | 5 repos | ~967 | Automated safety check: Pass | None | |
| Tool Use Data Synthesissunny-glow/Auto-BenchMax | 1.3k | — | ~3.3k | Automated safety check: Pass | None | |
| Agent Harness ConstructionKartikLabhshetwar/mind-mentor | 147 | 7 repos | ~500 | Automated safety check: Pass | Apache-2.0 | |
| Prompt Engineering Patternswshobson/agents | 40k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Model Benchmarkstheopenco/llmgateway | 1.7k | — | ~1.1k | Automated safety check: Notes | Custom licence |
Similar skills
Tool Use Data Synthesis
sunny-glow/Auto-BenchMax
Synthesize training data for ANY tool-use / agentic benchmark, in ANY repo.
Agent Harness Construction
KartikLabhshetwar/mind-mentor
Design and optimize AI agent action spaces, tool definitions, and observation formatting for higher completion rates.
Prompt Engineering Patterns
wshobson/agents
Reference for designing and tuning production LLM prompts: few-shot examples, chain-of-thought, structured outputs, templates and system prompts.
Model Benchmarks
theopenco/llmgateway
Run and report repository model or provider-mapping benchmarks.
Agent Prompt Quality Bar
mastra-ai/mastra
Universal quality bar and final audit rubric for any agent system prompt.
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Gf Learn
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Summarize Verilator, lint, or simulation output into a readable, actionable format.
Related
Categories
Questions about Gf Sim
What does Gf Sim do?
SystemVerilog simulator with structured output for orchestration. Gf Sim is an agent skill from codejunkie99/Gateflow-Plugin. SystemVerilog simulator with structured output for orchestration.
When should I use Gf Sim?
Gf Sim fits situations like: tasks that involve Structured output and tool calling.
How do I install Gf Sim in Claude Code?
Run `npx skills add codejunkie99/Gateflow-Plugin --skill gf-sim -a claude-code`. Or copy the skill folder (plugins/gateflow/skills/gf-sim in codejunkie99/Gateflow-Plugin) into .claude/skills/gf-sim in your project. Claude Code loads it when a task matches its description.
How do I install Gf Sim in Codex?
Run `npx skills add codejunkie99/Gateflow-Plugin --skill gf-sim -a codex`. Or copy the skill folder (plugins/gateflow/skills/gf-sim in codejunkie99/Gateflow-Plugin) into .agents/skills/gf-sim in your project. Codex loads it when a task matches its description.
Can I use Gf Sim 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-sim -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-sim, .gemini/skills/gf-sim, .github/skills/gf-sim and .opencode/skills/gf-sim in your project.
What does Gf Sim need to run?
SKILL.md names no scripts, command-line tools or credentials: Gf Sim is instructions for the agent only. Its frontmatter pre-approves these tools: Bash, Read, Glob, Grep.
Does Gf Sim 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 Sim safe to install?
Our automated static check of SKILL.md found notes only (runs commands with sudo; 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 Sim use?
Gf Sim 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 Sim use?
About 1.7k tokens (SKILL.md is roughly 6.7k 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 Sim?
Skills that share tags, products or a category with Gf Sim: Planning With Files (jarrodwatts/claude-code-config, 1.1k stars), Tool Use Data Synthesis (sunny-glow/Auto-BenchMax, 1.3k stars), Agent Harness Construction (KartikLabhshetwar/mind-mentor, 147 stars) and Prompt Engineering Patterns (wshobson/agents, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Gf Sim?
codejunkie99 (a GitHub user) maintains it in codejunkie99/Gateflow-Plugin, which has 117 GitHub stars. The repository holds 26 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.