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Event Store Design · dokhacgiakhoa | DecimalAI

codingby dokhacgiakhoa

Event Store Design

dokhacgiakhoa/event-store-design

Source dokhacgiakhoa/agent-skills-4-vibe-coding-cli ↗License NOASSERTION

Design and implement event stores for event-sourced systems.

SkillScore68Maintained

Automatic

Data Engineer pack

Last verified 8/29/2026

What it changes

Passed 17 of 25 test cases with the skill, and 16 of 25 without it.

Without skill64%

With skill68%

Checks it passed that the model alone missed

Demonstrating code logic to trigger snapshot persistence when stream version reaches threshold multiples.

1 fixed16 passed either way8 still failing0 broke

Pass-rate lift: +4 pp
Tokens: +13%
Agent turns: 0%
Response time: 0%

Model gemini-3.6-flashMeasured 8/29/2026v117 of 25 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-event-store-design/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-event-store-design/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dokhacgiakhoa-event-store-design, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dokhacgiakhoa-event-store-design/ and pins it in .decimal/skills.lock

decimalai skills add dokhacgiakhoa-event-store-design

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-event-store-design/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-event-store-design/SKILL.md

Raw file: /s/dokhacgiakhoa-event-store-design/SKILL.md ↗ · machine-readable summary at /s/dokhacgiakhoa-event-store-design.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

A test case the skill fixed. Same model, same prompt, with and without the skill.

Prompt

Our system takes a snapshot of aggregate state after every single event append to ensure hydration is fast. However, database write IOPS and storage costs are skyrocketing. Evaluate this snapshotting strategy and provide a balanced configuration strategy.

What was checked, without and with the skill
Checked	Without skill	With skill
Explaining that taking snapshots after every single event creates excessive storage bloat and IOPS overhead.	Passed	Passed
Recommending a configurable event count threshold between aggregate snapshots.	Passed	Passed
Demonstrating code logic to trigger snapshot persistence when stream version reaches threshold multiples.	Missed	Passed

case-25 · gemini-3.6-flash · 8/29/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md37 linessingle file

Event Store Design

Comprehensive guide to designing event stores for event-sourced applications.

Do not use this skill when

The task is unrelated to event store design
You need a different domain or tool outside this scope

Instructions

Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.
If detailed examples are required, open resources/implementation-playbook.md.

Use this skill when

Designing event sourcing infrastructure
Choosing between event store technologies
Implementing custom event stores
Optimizing event storage and retrieval
Setting up event store schemas
Planning for event store scaling

Core Concepts

🧠 Knowledge Modules (Fractal Skills)

1. 1. Event Store Architecture

2. 2. Event Store Requirements

3. Template 1: PostgreSQL Event Store Schema

4. Template 2: Python Event Store Implementation

5. Template 3: EventStoreDB Usage

6. Template 4: DynamoDB Event Store

7. Do's

8. Don'ts

Track record

Benchmark

17 / 25

test cases passed, vs 16 / 25 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dokhacgiakhoa / agent-skills-4-vibe-coding-cli

.agent/skills/event-store-design/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/10/2026Version v1

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Ready to supercharge your AI agents?

See it in action

What's inside

Event Store Design

Do not use this skill when

Instructions

Use this skill when

Core Concepts

🧠 Knowledge Modules (Fractal Skills)

1. 1. Event Store Architecture

2. 2. Event Store Requirements

3. Template 1: PostgreSQL Event Store Schema

4. Template 2: Python Event Store Implementation

5. Template 3: EventStoreDB Usage

6. Template 4: DynamoDB Event Store

7. Do's

8. Don'ts

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills