cqrs-tradeoffs

cqrs-tradeoffs is a skill for Claude Code, Codex from amadeus-dlc/amadeus. It costs 59 tokens per session (326 once invoked), scanned A, original, Apache-2.0.

A decision aid for CQRS, an architecture that uses separate models for changing data and reading data. It compares a single model with CQRS options, including versions that use events to record changes.

In plain words
What is it for?
Evaluating architecture choices involving read/write separation, eventual consistency, event sourcing, audit needs, asynchronous processing, and independent scaling.
Why use it?
It helps determine whether separating reads and writes solves a real scaling, contention, audit, or complexity problem. It makes the costs visible, such as delayed reads, extra testing, monitoring, replay tools, and harder debugging.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Evaluating architecture choices involving read/write separation, eventual consistency, event sourcing, audit needs, asynchronous processing, and independent scaling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/amadeus-dlc/amadeus/cqrs-tradeoffs
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add amadeus-dlc/amadeus --skill cqrs-tradeoffs
Clone the repo
git clone --depth 1 https://github.com/amadeus-dlc/amadeus

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cqrs-tradeoffs

README.md
[![agentmods](https://agentmods.dev/badge/skills/amadeus-dlc/amadeus/cqrs-tradeoffs/github.svg)](https://agentmods.dev/skills/amadeus-dlc/amadeus/cqrs-tradeoffs)
Your own site
<a href="https://agentmods.dev/skills/amadeus-dlc/amadeus/cqrs-tradeoffs"><img src="https://agentmods.dev/badge/skills/amadeus-dlc/amadeus/cqrs-tradeoffs/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cqrs-tradeoffs

Your own site · 80×15
<a href="https://agentmods.dev/skills/amadeus-dlc/amadeus/cqrs-tradeoffs"><img src="https://agentmods.dev/badge/skills/amadeus-dlc/amadeus/cqrs-tradeoffs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 326 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00059 $0.00326
Opus 5 $0.00030 $0.00163
Sonnet 5 $0.00012 $0.00065
Haiku 4.5 $0.00006 $0.00033

Measured 11d ago against content hash e0d5422f5783, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

cqrs-tradeoffs scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

amadeus/spaces/default/knowledge/amadeus-shared/software-design/cqrs-tradeoffs/SKILL.md · 36 lines

What it actually says

CQRS Tradeoffs

CQRS buys independent read/write models at the cost of more moving parts and explicit consistency choices.

Decision Frame

  1. Identify the forces: read scale, write contention, model complexity, audit needs, team maturity, and latency tolerance.

  2. Decide which consistency guarantees are required for commands and which can be eventual in reads.

  3. Check whether separate read models remove real complexity or just duplicate code.

  4. Choose the smallest pattern: unified model, CQRS without ES, CQRS with outbox, or event-sourced CQRS.

Tradeoffs

  • Benefits: optimized reads, simpler command invariants, independent scaling, better audit/projection options.

  • Costs: projection lag, more tests, operational monitoring, replay tooling, schema evolution, and debugging complexity.

  • Red flags: low traffic, simple CRUD, no contention, no audit need, or a team that cannot operate async pipelines.

Detailed Reference

For non-trivial implementation, review, or refactoring work, read references/details.md before giving final guidance. It contains the detailed rules, examples, smells, and migration notes that do not belong in the short invocation body.

Output

Return a recommendation, rejected alternatives, consistency model, migration path, and operational prerequisites.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 36 lines · 59 tokens per session scan A e0d5422f5783

Subscribe to this mod's changes

cqrs-tradeoffs is a skill published in the GitHub repository amadeus-dlc/amadeus (8 stars, last pushed 20d ago), licensed Apache-2.0. It adds 59 tokens to every session and 326 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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