Agent skill

Event Sourcing Design

by revfactory in revfactory/claude-code-harness

이벤트 소싱 + CQRS 패턴 설계 가이드. An agent skill from revfactory/claude-code-harness.

No licenceAuto-check passedBackend & APIs

Install Event Sourcing Design

skills CLI
$ npx skills add revfactory/claude-code-harness --skill event-sourcing-design -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install revfactory/claude-code-harness event-sourcing-design --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/experiments/results/case-014/harness/.claude/skills/event-sourcing-design .claude/skills/event-sourcing-design && rm -rf skills-src

Use ~/.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/

Facts

Skill name
event-sourcing-design
GitHub stars
120
Token cost
~385 tokens
SKILL.md length
85 words
Files
3 (incl. references)
Skills in repo
15
Repo updated
First seen
Licence
None found

At a glance

이벤트 소싱 + CQRS 패턴 설계 가이드. An agent skill from revfactory/claude-code-harness.

  • Works in 4 steps: 이벤트 = 사실(fact): 과거에 발생한 것, 불변 → 상태 = fold(events): 이벤트를 순서대로 적용한 결과 → 추가 전용(append-only): 이벤트 스트림에 추가만 가능 → …
  • Tasks that involve Event-driven systems
  • SKILL.md covers 이벤트 소싱 핵심 원칙, Aggregate 패턴, CQRS 분리 and Saga 상태 머신, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Event Sourcing Design is an agent skill from revfactory/claude-code-harness. 이벤트 소싱 + CQRS 패턴 설계 가이드. EventStore, Aggregate, Projection, Saga, Snapshot 구현 시 사용한다.

Its SKILL.md is about 390 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/aggregate-pattern.md` and `references/saga-pattern.md`).

It sits in Backend & APIs, covering Event-driven systems.

When your agent uses it

  • Tasks that involve Event-driven systems

Example prompts

  • “/event-sourcing-design”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. 이벤트 = 사실(fact): 과거에 발생한 것, 불변
  2. 상태 = fold(events): 이벤트를 순서대로 적용한 결과
  3. 추가 전용(append-only): 이벤트 스트림에 추가만 가능
  4. 시간 여행: 과거 시점의 상태를 재구성 가능

What it can do on your machine

Read from SKILL.md and the folder at commit 267005c. 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 javascript).

    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

Event Sourcing Design loads about 385 tokens when it runs, and up to ~1.5k if it reads all its reference files. Until then it costs about 27 tokens; SKILL.md has 85 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~27
When it runs · the whole SKILL.md, loaded when a task matches
~385
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.5k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 85 words (~385 tokens).

name
event-sourcing-design

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (references) in experiments/results/case-014/harness/.claude/skills/event-sourcing-design of revfactory/claude-code-harness.

  • SKILL.md
  • references/aggregate-pattern.md
  • references/saga-pattern.md

Open the folder on GitHubat commit 267005c

Compare with similar skills

Event Sourcing Design 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.

Event Sourcing Design compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Event Sourcing Design this skillrevfactory/claude-code-harness120—~385Automated safety check: PassNone
Stripe Projectsfossasia/eventyay1.7k5 repos~2kAutomated safety check: NotesApache-2.0
MQTTX CLIemqx/MQTTX5.1k—~1.9kAutomated safety check: PassApache-2.0
AWS Serverless Edazxkane/aws-skills3674 repos~3.2kAutomated safety check: PassMIT
Windmill Trigger Type Checklistwindmill-labs/windmill18k—~4.7kAutomated safety check: PassCustom licence
FoundatioFoundatioFx/Foundatio2.1k—~3.9kAutomated safety check: PassApache-2.0

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Categories

Questions about Event Sourcing Design

What does Event Sourcing Design do?

이벤트 소싱 + CQRS 패턴 설계 가이드. An agent skill from revfactory/claude-code-harness. Event Sourcing Design is an agent skill from revfactory/claude-code-harness. 이벤트 소싱 + CQRS 패턴 설계 가이드.

When should I use Event Sourcing Design?

Event Sourcing Design fits situations like: tasks that involve Event-driven systems.

How do I install Event Sourcing Design in Claude Code?

Run `npx skills add revfactory/claude-code-harness --skill event-sourcing-design -a claude-code`. Or copy the skill folder (experiments/results/case-014/harness/.claude/skills/event-sourcing-design in revfactory/claude-code-harness) into .claude/skills/event-sourcing-design in your project. Claude Code loads it when a task matches its description.

How do I install Event Sourcing Design in Codex?

Run `npx skills add revfactory/claude-code-harness --skill event-sourcing-design -a codex`. Or copy the skill folder (experiments/results/case-014/harness/.claude/skills/event-sourcing-design in revfactory/claude-code-harness) into .agents/skills/event-sourcing-design in your project. Codex loads it when a task matches its description.

Can I use Event Sourcing Design 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 revfactory/claude-code-harness --skill event-sourcing-design -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/event-sourcing-design, .gemini/skills/event-sourcing-design, .github/skills/event-sourcing-design and .opencode/skills/event-sourcing-design in your project.

What does Event Sourcing Design need to run?

SKILL.md names no scripts, command-line tools or credentials: Event Sourcing Design is instructions for the agent only.

Does Event Sourcing Design 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 Event Sourcing Design 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 Event Sourcing Design use?

No licence was found for Event Sourcing Design or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Event Sourcing Design use?

About 385 tokens (SKILL.md is roughly 1.5k 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 1.1k tokens, read only when the agent opens those files.

What are the alternatives to Event Sourcing Design?

Skills that share tags, products or a category with Event Sourcing Design: Stripe Projects (fossasia/eventyay, 1.7k stars), MQTTX CLI (emqx/MQTTX, 5.1k stars), AWS Serverless Eda (zxkane/aws-skills, 367 stars) and Windmill Trigger Type Checklist (windmill-labs/windmill, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Event Sourcing Design?

revfactory (a GitHub user) maintains it in revfactory/claude-code-harness, which has 120 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on March 6, 2026.

Source: revfactory/claude-code-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.