scalability-review

scalability-review is a skill for Claude Code, Codex from Nordic-AI/production-readiness-skills. It costs 118 tokens per session (4,647 once invoked), scanned A, original, Apache-2.0.

A review of whether an application can handle its expected workload and continue growing. It examines databases, caching, connections, request limits, background work, and how the application is structured.

In plain words
What is it for?
Use it to check database indexes and repeated queries, caching, connection pools, pagination, rate limiting, background jobs, stateless design, and capacity for users, requests, data, and regions.
Why use it?
It finds common causes of slowdowns and failures before traffic or data volume makes them expensive to fix. The review adjusts its expectations to the project’s size and intended use.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it to check database indexes and repeated queries, caching, connection pools, pagination, rate limiting, background jobs, stateless design, and capacity for users, requests, data, and regions.

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Install with agentmods
npx agentmods add skills/nordic-ai/production-readiness-skills/scalability-review
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 Nordic-AI/production-readiness-skills --skill scalability-review
Clone the repo
git clone --depth 1 https://github.com/Nordic-AI/production-readiness-skills

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 scalability-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/nordic-ai/production-readiness-skills/scalability-review/github.svg)](https://agentmods.dev/skills/nordic-ai/production-readiness-skills/scalability-review)
Your own site
<a href="https://agentmods.dev/skills/nordic-ai/production-readiness-skills/scalability-review"><img src="https://agentmods.dev/badge/skills/nordic-ai/production-readiness-skills/scalability-review/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 scalability-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/nordic-ai/production-readiness-skills/scalability-review"><img src="https://agentmods.dev/badge/skills/nordic-ai/production-readiness-skills/scalability-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 118 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,647 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 $0.00118 $0.04647
Opus 5 $0.00059 $0.02323
Sonnet 5 $0.00024 $0.00929
Haiku 4.5 $0.00012 $0.00465

Measured 12d ago against content hash 1f2ba6cde00c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

scalability-review 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 12d 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.

skills/scalability-review/SKILL.md · 421 lines

How it starts

The opening of the file, as written. The whole thing — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scalability Review

You review whether the application can handle its target load and grow with demand. Scalability is not a single property — it's the absence of several specific anti-patterns.

This skill is the most scope-tier-sensitive. A prototype should not be forced to defend horizontal scaling. A scalable-tier system must.

Inputs

From orchestrator: scope_tier, stack_summary, gitnexus_indexed, entry points, and any context on expected load (QPS, data volume, tenant count, geographic distribution).

If expected load isn't known, ask — but keep it simple:

Rough scale targets for scaling review:
- Concurrent users (peak): ?
- Requests/sec at peak: ?
- Total data volume (e.g. rows in largest table): ?
- Tenants / accounts: ?
- Geographic spread: single region / multi-region / global?

Mode detection

  • Plan mode — produce scalability report with prioritized findings.
  • Edit mode — apply targeted fixes. Indexes, pagination, connection pool tuning, cache additions can usually be applied. Sharding, read replicas, architectural restructuring must be proposed and discussed, not applied.

Thresholds by tier

Tier DB indexing N+1 Caching Stateless Rate limiting Pagination Async jobs Headroom
prototype advisory advisory optional advisory optional required on list endpoints optional advisory
team required on common queries required to fix recommended where beneficial required (no in-process session state) required on public + auth endpoints required required for long-running work 2× expected load
scalable required + reviewed regularly required required — multi-tier, invalidation strategy required + tested required + per-tenant required + cursor-based for large sets required + queue-backed 3-5× expected load, headroom monitored

Review surface

1. Database schema and indexing

Read the full file on GitHub · 421 lines

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. 12d ago First seen · 421 lines · 118 tokens per session scan A 1f2ba6cde00c

Subscribe to this mod's changes

scalability-review is a skill published in the GitHub repository Nordic-AI/production-readiness-skills (2 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 118 tokens to every session and 4,647 once invoked, about $0.0006 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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