Overview
agent-harness-fault-injection is an open-source workflow skill for Claude Code and compatible agents, published by sickn33. Its author describes it as: “Use when an agent workflow needs deterministic recovery evidence for sandbox, MCP/tool, worker, checkpoint, memory, or orchestration failures.”. The project has 47k stars on GitHub and is available under the MIT license. Add it to your setup with `/plugin marketplace add sickn33/agentic-awesome-skills`.
What agent-harness-fault-injection does
Use a deterministic, non-production fault schedule to test whether an agent workflow preserves state, budgets, safety boundaries, and evidence when a dependency fails. The output is a small fault matrix, an event timeline, and a verdict that distinguishes recovered, contained, unrecoverable, and inconclusive runs.
What’s inside
The SKILL.md for agent-harness-fault-injection is organised into these sections:
- Overview
- When to Use This Skill
- Safety and Boundary Preconditions
- Recovery Contract
- Fault Matrix
- Deterministic Injection Schedule
- Recovery Rules by Boundary
- Sandbox and MCP/tool failures
- Worker restart and checkpoints
- Parallel branches
- Memory loss
- Budgets and Terminal Verdicts
Installation
Add agent-harness-fault-injection to your agent with:
/plugin marketplace add sickn33/agentic-awesome-skillsReview a skill’s source before installing it — skills can instruct your agent to run commands. This command comes from the skill’s public repository, which is the source of truth for setup steps. New to skills? Read how to install Claude Code skills.
Supported agents
- Claude Code — ships a claude code plugin marketplace
- Codex — declared in the repository topics
- Cursor — declared in the repository topics
- Antigravity — declared in the repository topics
License
agent-harness-fault-injection is published under the MIT license.
Strengths
- Clear MIT license — safe to read and adapt within its terms
- Ships in sickn33/agentic-awesome-skills, an established project with 46,693 GitHub stars
- Works with Claude Code, Codex, Cursor, Antigravity
- Actively maintained — repository updated in the last 30 days
- Its repository gained 1,369 GitHub stars over the last 28 days
Author
Topics
Frequently asked questions
- What does agent-harness-fault-injection do?
- Use when an agent workflow needs deterministic recovery evidence for sandbox, MCP/tool, worker, checkpoint, memory, or orchestration failures.
- How do I install agent-harness-fault-injection?
- Run /plugin marketplace add sickn33/agentic-awesome-skills in your agent, then reload your skills. Review the source at https://github.com/sickn33/agentic-awesome-skills before installing.
- Is agent-harness-fault-injection free to use?
- Yes. agent-harness-fault-injection is free and open source under the MIT license, so you can read, run, and adapt it within that license's terms.
- Which agents does agent-harness-fault-injection work with?
- agent-harness-fault-injection lists Claude Code, Codex, Cursor, and Antigravity — named in its SKILL.md, its plugin marketplace or its repository topics. Skills use the portable SKILL.md format, so other agents that read that format may load it too.
- Where does agent-harness-fault-injection come from?
- agent-harness-fault-injection ships inside sickn33/agentic-awesome-skills, a repository that contains 70 catalogued skills in total. The repository's 46,693 GitHub stars apply to that whole collection, not to this skill on its own.