Agent Harness Fault Injection
sickn33/agentic-awesome-skills
A skill your agent uses when an agent workflow needs deterministic recovery evidence for sandbox, MCP/tool, worker, checkpoint, memory, or orchestration failures.
Add, configure, and manage faults on Simulink, Simscape, and System Composer model signals for robustness analysis and safety validation.
Custom licenceAuto-check passed
Install Inject Faults
$ npx skills add matlab/simulink-agentic-toolkit --skill inject-faults -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install matlab/simulink-agentic-toolkit inject-faults --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/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills-catalog/verification-validation-and-test/inject-faults .claude/skills/inject-faults && 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 "inject-faults" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faults into .claude/skills/inject-faults/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inject-faults", 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/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faultsType 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 matlab/simulink-agentic-toolkit --skill inject-faults -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install matlab/simulink-agentic-toolkit inject-faults --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills-catalog/verification-validation-and-test/inject-faults .agents/skills/inject-faults && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "inject-faults" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faults into .agents/skills/inject-faults/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inject-faults", 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 matlab/simulink-agentic-toolkit --skill inject-faults -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install matlab/simulink-agentic-toolkit inject-faults --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills-catalog/verification-validation-and-test/inject-faults .cursor/skills/inject-faults && 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 "inject-faults" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faults into .cursor/skills/inject-faults/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inject-faults", 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/matlab/simulink-agentic-toolkit.git --path skills-catalog/verification-validation-and-test/inject-faults--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 matlab/simulink-agentic-toolkit --skill inject-faults -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install matlab/simulink-agentic-toolkit inject-faults --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills-catalog/verification-validation-and-test/inject-faults .gemini/skills/inject-faults && 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 "inject-faults" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faults into .gemini/skills/inject-faults/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inject-faults", 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 matlab/simulink-agentic-toolkit inject-faultsInstalls 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 matlab/simulink-agentic-toolkit --skill inject-faults -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills-catalog/verification-validation-and-test/inject-faults .github/skills/inject-faults && 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 "inject-faults" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faults into .github/skills/inject-faults/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inject-faults", 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 matlab/simulink-agentic-toolkit --skill inject-faults -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install matlab/simulink-agentic-toolkit inject-faults --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills-catalog/verification-validation-and-test/inject-faults .opencode/skills/inject-faults && 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 "inject-faults" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/verification-validation-and-test/inject-faults into .opencode/skills/inject-faults/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inject-faults", 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
inject-faults- GitHub stars
- 1.2k
- Token cost
- ~2.3k tokens
- SKILL.md length
- 948 words
- Files
- 8 (incl. references)
- Skills in repo
- 43
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Add, configure, and manage faults on Simulink, Simscape, and System Composer model signals for robustness analysis and safety validation.
- Works in 6 steps: Faults attach to block PORTS, not… → NEVER directly edit _faultInfo.xml… → Fault names must be valid MATLAB… → …
- Injecting faults (stuck
- SKILL.md covers When to Use, When NOT to Use, Probe and Key Concepts, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Inject Faults is an agent skill from matlab/simulink-agentic-toolkit. Add, configure, and manage faults on Simulink, Simscape, and System Composer model signals for robustness analysis and safety validation. Use when injecting faults (stuck, noise, gain, offset) onto block inports/outports, enabling fault simulation, or analyzing fault effects. Covers sensor failures, signal corruptions, actuator faults, FMEA validation, and robustness testing. Requires Simulink Fault Analyzer.
Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including reference files (for example `manifest.yaml`, `references/advanced-operations.md` and `references/fault-behaviors.md`).
The repository describes itself as: The Simulink Agentic Toolkit gives your AI agent both the tools and the expertise to work effectively with Simulink and Model-Based Design.
When your agent uses it
- Injecting faults (stuck
- Offset) onto block inports/outports
- Enabling fault simulation
- Analyzing fault effects
Example prompts
- “/inject-faults”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Faults attach to block PORTS, not blocks. You must get the port handle via get_param(blockPath, 'PortHandles').
- NEVER directly edit _faultInfo.xml files. Always use MATLAB APIs to modify fault definitions.
- Fault names must be valid MATLAB identifiers (no spaces, slashes, or special characters). Use camelCase or PascalCase.
- The fault behavior model name (first arg to addBehavior) must also be a valid MATLAB identifier.
- NEVER use Simulink.fault.deleteAll or Simulink.fault.deleteFault to toggle faults on/off for simulation. Deleting faults destroys fault…
- Not supported: Faults inside Stateflow charts, fault models, or observer models.
What it can do on your machine
Read from SKILL.md and the folder at commit c58e6ae. 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 matlab).
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
Inject Faults loads about 2.3k tokens when it runs, and up to ~11k if it reads all its reference files. Until then it costs about 107 tokens; SKILL.md has 948 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); 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 948 words (~2,257 tokens).
“Use evaluate_matlab_code with the Simulink.fault API to programmatically inject faults into Simulink models. Faults override signal values at block ports to simulate hardware failures, sensor faults, and actuator malfunctions.”
- name
- inject-faults
- license
- https://www.mathworks.com/content/dam/mathworks/license/pmrl/license.md
- metadata.version
- 1.0
- metadata.author
- MathWorks
Files
SKILL.md and 7 other files (references) in skills-catalog/verification-validation-and-test/inject-faults of matlab/simulink-agentic-toolkit.
- SKILL.md
- manifest.yaml
- references/advanced-operations.md
- references/fault-behaviors.md
- references/preflight-and-adding-faults.md
- references/simulation-workflows.md
- references/test-case-integration.md
- references/triggers-and-conditionals.md
Open the folder on GitHubat commit c58e6ae
Compare with similar skills
Inject Faults 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 |
|---|---|---|---|---|---|---|
| Inject Faults this skillmatlab/simulink-agentic-toolkit | 1.2k | — | ~2.3k | Automated safety check: Pass | Custom licence | |
| Agent Harness Fault Injectionsickn33/agentic-awesome-skills | 47k | 1 repos | ~2.9k | Automated safety check: Pass | MIT | |
| AWS Fault Injection Serviceaws/agent-toolkit-for-aws | 2.8k | — | ~2.2k | Automated safety check: Pass | Apache-2.0 | |
| Configure Channelopenclaw/openclaw | 392k | — | ~946 | Automated safety check: Pass | MIT | |
| Prompt Injection Defensesickn33/agentic-awesome-skills | 47k | 2 repos | ~4.2k | Automated safety check: Warn | MIT | |
| ConfigurationBuilderIO/agent-native | 7.1k | — | ~2.1k | Automated safety check: Pass | None |
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Configure Channel
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Prompt Injection Defense
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Configuration
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Where a configuration value belongs — app config schema, agent-native.config.ts, or an environment variable — and how the layers resolve.
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Questions about Inject Faults
What does Inject Faults do?
Add, configure, and manage faults on Simulink, Simscape, and System Composer model signals for robustness analysis and safety validation. Inject Faults is an agent skill from matlab/simulink-agentic-toolkit. Add, configure, and manage faults on Simulink, Simscape, and System Composer model signals for robustness analysis and safety validation.
When should I use Inject Faults?
Inject Faults fits situations like: injecting faults (stuck; offset) onto block inports/outports; enabling fault simulation; analyzing fault effects.
How do I install Inject Faults in Claude Code?
Run `npx skills add matlab/simulink-agentic-toolkit --skill inject-faults -a claude-code`. Or copy the skill folder (skills-catalog/verification-validation-and-test/inject-faults in matlab/simulink-agentic-toolkit) into .claude/skills/inject-faults in your project. Claude Code loads it when a task matches its description.
How do I install Inject Faults in Codex?
Run `npx skills add matlab/simulink-agentic-toolkit --skill inject-faults -a codex`. Or copy the skill folder (skills-catalog/verification-validation-and-test/inject-faults in matlab/simulink-agentic-toolkit) into .agents/skills/inject-faults in your project. Codex loads it when a task matches its description.
Can I use Inject Faults 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 matlab/simulink-agentic-toolkit --skill inject-faults -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/inject-faults, .gemini/skills/inject-faults, .github/skills/inject-faults and .opencode/skills/inject-faults in your project.
What does Inject Faults need to run?
SKILL.md names no scripts, command-line tools or credentials: Inject Faults is instructions for the agent only.
Does Inject Faults 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 Inject Faults 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 Inject Faults use?
Inject Faults 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 Inject Faults use?
About 2.3k tokens (SKILL.md is roughly 9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 8.6k tokens, read only when the agent opens those files.
What are the alternatives to Inject Faults?
Skills that share tags, products or a category with Inject Faults: Agent Harness Fault Injection (sickn33/agentic-awesome-skills, 47k stars), AWS Fault Injection Service (aws/agent-toolkit-for-aws, 2.8k stars), Configure Channel (openclaw/openclaw, 392k stars) and Prompt Injection Defense (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Inject Faults?
matlab (a GitHub organization) maintains it in matlab/simulink-agentic-toolkit, which has 1,199 GitHub stars. The repository holds 43 skills in this directory. The repository was last updated on October 7, 2026.
Source: matlab/simulink-agentic-toolkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.