Chaos Tdd Fault Injection

Q: What is a Claude Code skill and how does the Chaos Tdd Fault Injection skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Chaos Tdd Fault Injection is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: testing · Last updated: 2026-07-15

Design know-how for ADR-0077 chaos-TDD — deterministic fault injection at existing seams (LLMBackend Protocol / requests HTTP layer) where the fault-injection test states the desired guarded behavior FIRST and the minimal guard lands in the same PR. Use when hardening a pipeline against LLM/external-I/O fault families (truncation, timeouts, 429s, wrong-shaped-but-parseable JSON, flapping backends), when building a fault catalog from operational bug history, when adding hypothesis-based fuzz over LLM output shapes, or when reviewing whether a new pipeline's failure paths abstain with reason codes. NOT for per-event audit log schema design (that is replayable-audit-logs / ADR-0075), NOT for read-only aggregate readings (read-only-instruments / ADR-0071), NOT for single-bug regression pinning after the fact (that is ai-regression-testing — this skill is its front-loaded, catalog-driven counterpart), and NOT for infra-level chaos (chaostoolkit/toxiproxy are the wrong altitude for a single local process).

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Principle (canonical rationale: [ADR-0077](../../../docs/adr/0077-chaos-tdd-fault-injection.md)): operational fault catalog → fault-injection test asserting the desired guarded behavior (RED) → minimal guard in the same PR (GREEN). This is the front-loaded form of the ai-regression-testing discipline: instead of pinning a bug after it burned a production run, the catalog predicts the family and the test forces the guard before the fault ever fires live. Netflix-style random production chaos is explicitly rejected here — episode logs are irreplaceable research material, and a single local…

What this skill does

Chaos Tdd Fault Injection is a community-contributed Claude Code skill in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/chaos-tdd-fault-injection/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when hardening a pipeline against LLM/external-I/O fault families (truncation, timeouts, 429s, wrong-shaped-but-parseable JSON, flapping backends), when building a fault catalog from operational bug history, when adding hypothesis-based fuzz over LLM output shapes, or when reviewing whether a new pipeline's failure paths abstain with reason codes. NOT for per-event audit log schema design (that is replayable-audit-logs / ADR-0075), NOT for read-only aggregate readings (read-only-instruments / ADR-0071), NOT for single-bug regression pinning after the fact (that is ai-regression-testing — this skill is its front-loaded, catalog-driven counterpart), and NOT for infra-level chaos (chaostoolkit/toxiproxy are the wrong altitude for a single local process).

Who uses this skill

The Chaos Tdd Fault Injection Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 158,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/chaos-tdd-fault-injection
curl -L https://claudskills.com/skills/chaos-tdd-fault-injection/SKILL.md \
  -o ~/.claude/skills/chaos-tdd-fault-injection/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/chaos-tdd-fault-injection/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/chaos-tdd-fault-injection/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\chaos-tdd-fault-injection\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Chaos Tdd Fault Injection Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/chaos-tdd-fault-injection/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Chaos Tdd Fault Injection skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Chaos Tdd Fault Injection skill?

Use Chaos Tdd Fault Injection when your Claude Code task falls under the Engineering category — specifically in the testing area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Chaos Tdd Fault Injection" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Chaos Tdd Fault Injection skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Chaos Tdd Fault Injection is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/shimo4228/contemplative-agent/blob/HEAD/.claude/skills/chaos-tdd-fault-injection/SKILL.md
License: MIT
Author: shimo4228
Website: https://doi.org/10.5281/zenodo.19212118

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

shimo4228. (2026). Chaos Tdd Fault Injection [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/chaos-tdd-fault-injection/

BibTeX

@misc{chaos-tdd-fault-injection-2026,
  author    = {shimo4228},
  title     = {Chaos Tdd Fault Injection [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/chaos-tdd-fault-injection/}
}

Embed this skill

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Badge

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Security scan

Grade A · scanned 2026-07-23 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (filesystem), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
⚠ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/chaos-tdd-fault-injection/#security)

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