Is the Designing Distributed System Tests skill free?

Yes. The skill itself is free from shenli/distributed-system-testing. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Designing Distributed System Tests SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install Designing Distributed System Tests?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Designing Distributed System Tests with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Designing Distributed System Tests

Claim-driven test plans for distributed and stateful systems, tied to fault-injection scenarios

by shenli · shenli/distributed-system-testing

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 31, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · dcddfef

Fetched SKILL.md via GitHub API/raw; frontmatter parses with name+description; spot-checked assets/plan-template.md, references/catalog-index.md, references/common-distributed-systems-pitfalls.md — all HTTP 200. No security smells (no curl|sh, base64, exfil). Trigger: judged 5 phrasings, all 5 correct. Output: designed one change-scoped task and wrote two real artifacts to scratchpad. Baseline gave a 7-item flat checklist whose crash test is "kill leader after ack, restart, value still there" with exit criterion "all tests pass in CI"; the skill-followed plan named claims C1-C4 plus a "missing claims" section, and scenario S1 injected SIGKILL "between value-WAL-fsync and dedup-WAL-fsync" with oracle "exactly ONE committed effect ... state comparison against model, not logs fine" — a double-commit-on-retry window the baseline never targets.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What Designing Distributed System Tests does

Guides an agent to design a claim-driven test plan for a distributed or stateful system: it extracts the guarantees the system claims (durability, linearizability, idempotency, isolation, ordering), generates failure-mode hypotheses tied to each claim, picks techniques from a catalog, and emits a structured plan file with fault-injection scenarios and machine-checkable oracles. Triggers when asked what to test for a change, for a holistic release-validation plan, or how to test durability, partitions, tenant isolation, or fairness across shards or tenants.

How to install Designing Distributed System Tests

git clone --depth 1 https://github.com/shenli/distributed-system-testing.git /tmp/designing-distributed-system-tests-src
mkdir -p ~/.claude/skills
cp -R /tmp/designing-distributed-system-tests-src/skills/designing-distributed-system-tests ~/.claude/skills/designing-distributed-system-tests
# Companion skill in same repo: skills/executing-distributed-system-tests (runs the plan this one emits).
# Plugin marketplace alt: repo ships .claude-plugin/marketplace.json (plugin "distributed-testing-skills").
# No external deps to produce a plan; executing the plan needs docker/netem/etc. per the plan's env section.

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Designing Distributed System Tests

/designing-distributed-system-tests Claim-driven test plans for distributed and stateful systems, tied to fault-injection scenarios

It also activates on plain-language prompts like these:

Design a test plan for this replicated database
Write a fault matrix for this consensus system
Create a stability plan for our messaging service

Frequently asked questions

Is the Designing Distributed System Tests skill free?: Yes. The skill itself is free from shenli/distributed-system-testing. SkillProof publishes the install command and an independent test verdict at no cost.
Does Designing Distributed System Tests work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 31, 2026. Verdict: Tested · Works. Fetched SKILL.md via GitHub API/raw; frontmatter parses with name+description; spot-checked assets/plan-template.md, references/catalog-index.md, references/common-distributed-systems-pitfalls.md — all HTTP 200. No security smells (no curl|sh, base64, exfil). Trigger: judged 5 phrasings, all 5 correct. Output: designed one change-scoped task and wrote two real artifacts to scratchpad. Baseline gave a 7-item flat checklist whose crash test is "kill leader after ack, restart, value still there" with exit criterion "all tests pass in CI"; the skill-followed plan named claims C1-C4 plus a "missing claims" section, and scenario S1 injected SIGKILL "between value-WAL-fsync and dedup-WAL-fsync" with oracle "exactly ONE committed effect ... state comparison against model, not logs fine" — a double-commit-on-retry window the baseline never targets.
What is the Designing Distributed System Tests SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install Designing Distributed System Tests?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Designing Distributed System Tests with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.