Concurrency Fuzzing Testing
dzhalaevd/Donatello
Use as the lead skill when Python tests must expose scheduler/interleaving bugs in asyncio, threading, queues, workers, databases, caches, or mixed-concurrency code
Run a Python fuzzer script (provided as a string) for a fixed duration.
Install Simplified Python Fuzzer
$ npx skills add opensage-agent/opensage-adk --skill simplified-python-fuzzer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install opensage-agent/opensage-adk simplified-python-fuzzer --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/opensage-agent/opensage-adk.git skills-src && mkdir -p .claude/skills && cp -r skills-src/src/opensage/bash_tools/fuzz/simplified-python-fuzzer .claude/skills/simplified-python-fuzzer && 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 "simplified-python-fuzzer" agent skill from https://github.com/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzer into .claude/skills/simplified-python-fuzzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simplified-python-fuzzer", 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/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzerType 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 opensage-agent/opensage-adk --skill simplified-python-fuzzer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install opensage-agent/opensage-adk simplified-python-fuzzer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opensage-agent/opensage-adk.git skills-src && mkdir -p .agents/skills && cp -r skills-src/src/opensage/bash_tools/fuzz/simplified-python-fuzzer .agents/skills/simplified-python-fuzzer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "simplified-python-fuzzer" agent skill from https://github.com/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzer into .agents/skills/simplified-python-fuzzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simplified-python-fuzzer", 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 opensage-agent/opensage-adk --skill simplified-python-fuzzer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install opensage-agent/opensage-adk simplified-python-fuzzer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opensage-agent/opensage-adk.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/src/opensage/bash_tools/fuzz/simplified-python-fuzzer .cursor/skills/simplified-python-fuzzer && 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 "simplified-python-fuzzer" agent skill from https://github.com/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzer into .cursor/skills/simplified-python-fuzzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simplified-python-fuzzer", 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/opensage-agent/opensage-adk.git --path src/opensage/bash_tools/fuzz/simplified-python-fuzzer--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 opensage-agent/opensage-adk --skill simplified-python-fuzzer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install opensage-agent/opensage-adk simplified-python-fuzzer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opensage-agent/opensage-adk.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/src/opensage/bash_tools/fuzz/simplified-python-fuzzer .gemini/skills/simplified-python-fuzzer && 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 "simplified-python-fuzzer" agent skill from https://github.com/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzer into .gemini/skills/simplified-python-fuzzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simplified-python-fuzzer", 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 opensage-agent/opensage-adk simplified-python-fuzzerInstalls 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 opensage-agent/opensage-adk --skill simplified-python-fuzzer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/opensage-agent/opensage-adk.git skills-src && mkdir -p .github/skills && cp -r skills-src/src/opensage/bash_tools/fuzz/simplified-python-fuzzer .github/skills/simplified-python-fuzzer && 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 "simplified-python-fuzzer" agent skill from https://github.com/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzer into .github/skills/simplified-python-fuzzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simplified-python-fuzzer", 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 opensage-agent/opensage-adk --skill simplified-python-fuzzer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install opensage-agent/opensage-adk simplified-python-fuzzer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opensage-agent/opensage-adk.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/src/opensage/bash_tools/fuzz/simplified-python-fuzzer .opencode/skills/simplified-python-fuzzer && 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 "simplified-python-fuzzer" agent skill from https://github.com/opensage-agent/opensage-adk/tree/main/src/opensage/bash_tools/fuzz/simplified-python-fuzzer into .opencode/skills/simplified-python-fuzzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simplified-python-fuzzer", 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
simplified-python-fuzzer- GitHub stars
- 127
- Token cost
- ~228 tokens
- SKILL.md length
- 63 words
- Files
- 2 (incl. scripts)
- Skills in repo
- 21
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Run a Python fuzzer script (provided as a string) for a fixed duration.
- Tasks that involve Fuzzing
- SKILL.md covers Usage, Parameters, Return Value and Requires Sandbox, plus 1 more section
- Runs Shell scripts from its folder
What it does
Simplified Python Fuzzer is an agent skill from opensage-agent/opensage-adk. Run a Python fuzzer script (provided as a string) for a fixed duration.
Its SKILL.md is about 230 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including scripts (for example `scripts/simplified_python_fuzzer.sh`).
It sits in Security, covering Fuzzing. It works with Python. The licence is Apache-2.0.
When your agent uses it
- Tasks that involve Fuzzing
Example prompts
- “/simplified-python-fuzzer”
Requirements
- Python 3
- A Bash shell
What it can do on your machine
Read from SKILL.md and the folder at commit 54d6470. 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
Ships 1 file in scripts/ (Shell), which the agent can run.
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
Simplified Python Fuzzer loads about 228 tokens when it runs. Until then it costs about 24 tokens; SKILL.md has 63 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); the scripts in this folder are not scanned.
SKILL.md
The full file from opensage-agent/opensage-adk at commit 54d6470, republished under its Apache-2.0 licence (© opensage-agent). 63 words, ~228 tokens.
Download SKILL.mdSave it as
.claude/skills/simplified-python-fuzzer/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- simplified-python-fuzzer
- description
- Run a Python fuzzer script (provided as a string) for a fixed duration.
- should_run_in_sandbox
- main
- returns_json
- false
Simplified Python Fuzzer
Execute a Python fuzzer script (provided inline) and collect results.
Usage
/bash_tools/fuzz/simplified-python-fuzzer/scripts/simplified_python_fuzzer.sh "$(cat fuzzer_script.py)"/bash_tools/fuzz/simplified-python-fuzzer/scripts/simplified_python_fuzzer.sh "$(cat fuzzer_script.py)" 300Parameters
script (required, positional position 0)
Type: str
Python code as a string (executed with python3).
duration_seconds (optional, positional position 1)
Type: int (default: 180)
Duration to run in seconds.
Return Value
Returns text output with execution status and any detected crash files.
Requires Sandbox
main
Timeout
250 seconds
© opensage-agent, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (scripts) in src/opensage/bash_tools/fuzz/simplified-python-fuzzer of opensage-agent/opensage-adk.
- SKILL.md
- scripts/simplified_python_fuzzer.sh
Open the folder on GitHubat commit 54d6470
Compare with similar skills
Simplified Python Fuzzer 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 |
|---|---|---|---|---|---|---|
| Simplified Python Fuzzer this skillopensage-agent/opensage-adk | 127 | — | ~228 | Automated safety check: Pass | Apache-2.0 | |
| Concurrency Fuzzing Testingdzhalaevd/Donatello | 135 | — | ~3.3k | Automated safety check: Pass | Apache-2.0 | |
| Directed Test Input GeneratorArabelaTso/Skills-4-SE | 253 | — | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Fuzzing Input GeneratorArabelaTso/Skills-4-SE | 253 | — | ~4.9k | Automated safety check: Pass | Apache-2.0 | |
| Fuzzing Pythonbenchflow-ai/skillsbench | 1.8k | — | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Security Auditoreigent-ai/eigent | 15k | — | ~1.8k | Automated safety check: Notes | Apache-2.0 |
Similar skills
Directed Test Input Generator
ArabelaTso/Skills-4-SE
Generate targeted test inputs to reach specific code paths and hard-to-reach behaviors in Python code.
Fuzzing Input Generator
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Generate randomized and edge-case inputs to detect unexpected failures, bugs, and security vulnerabilities through fuzz testing.
Fuzzing Python
benchflow-ai/skillsbench
Creating fuzz driver for Python libraries using LibFuzzer. An agent skill from benchflow-ai/skillsbench.
Security Auditor
eigent-ai/eigent
Audits source code, dependencies and config files for vulnerabilities and hardcoded secrets, using two bundled Python scanners and an OWASP Top 10 checklist.
Fizz
pashov/skills
Generate Echidna/Medusa-compatible Solidity fuzz suites from Foundry or Hardhat projects.
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Create New Tool
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Scaffold a new bashtools Skill under bashtools/newtools/. An agent skill from opensage-agent/opensage-adk.
Extract Crashes
opensage-agent/opensage-adk
Extract crash inputs from fuzzing output into a target directory.
Get Call Paths
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Get a path in the call graph from a source function to a specified destination function in the codebase.
Get Callee
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Related
Works with
Categories
Questions about Simplified Python Fuzzer
What does Simplified Python Fuzzer do?
Run a Python fuzzer script (provided as a string) for a fixed duration. Simplified Python Fuzzer is an agent skill from opensage-agent/opensage-adk. Run a Python fuzzer script (provided as a string) for a fixed duration.
When should I use Simplified Python Fuzzer?
Simplified Python Fuzzer fits situations like: tasks that involve Fuzzing.
How do I install Simplified Python Fuzzer in Claude Code?
Run `npx skills add opensage-agent/opensage-adk --skill simplified-python-fuzzer -a claude-code`. Or copy the skill folder (src/opensage/bash_tools/fuzz/simplified-python-fuzzer in opensage-agent/opensage-adk) into .claude/skills/simplified-python-fuzzer in your project. Claude Code loads it when a task matches its description.
How do I install Simplified Python Fuzzer in Codex?
Run `npx skills add opensage-agent/opensage-adk --skill simplified-python-fuzzer -a codex`. Or copy the skill folder (src/opensage/bash_tools/fuzz/simplified-python-fuzzer in opensage-agent/opensage-adk) into .agents/skills/simplified-python-fuzzer in your project. Codex loads it when a task matches its description.
Can I use Simplified Python Fuzzer 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 opensage-agent/opensage-adk --skill simplified-python-fuzzer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/simplified-python-fuzzer, .gemini/skills/simplified-python-fuzzer, .github/skills/simplified-python-fuzzer and .opencode/skills/simplified-python-fuzzer in your project.
What does Simplified Python Fuzzer need to run?
Going by SKILL.md and its folder, Simplified Python Fuzzer needs a shell for the scripts in its folder. Our summary lists: Python 3; A Bash shell.
Does Simplified Python Fuzzer 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 Simplified Python Fuzzer 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Simplified Python Fuzzer use?
Simplified Python Fuzzer is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Simplified Python Fuzzer use?
About 228 tokens (SKILL.md is roughly 912 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 Simplified Python Fuzzer?
Skills that share tags, products or a category with Simplified Python Fuzzer: Concurrency Fuzzing Testing (dzhalaevd/Donatello, 135 stars), Directed Test Input Generator (ArabelaTso/Skills-4-SE, 253 stars), Fuzzing Input Generator (ArabelaTso/Skills-4-SE, 253 stars) and Fuzzing Python (benchflow-ai/skillsbench, 1.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Simplified Python Fuzzer?
opensage-agent (a GitHub organization) maintains it in opensage-agent/opensage-adk, which has 127 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on August 4, 2026.
Source: opensage-agent/opensage-adk on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.