critic-scalability

critic-scalability is a skill for Claude Code from iampawan/Manifest. It costs 36 tokens per session (574 once invoked), scanned A, original, MIT.

A review check for scaling problems that may appear as software grows from hundreds to tens of thousands of users. It looks at database access, growing collections, frequently used code paths, and slow service dependencies.

In plain words
What is it for?
Use it to review queries for N+1 access, check whether growing data has limits or cleanup, and assess caching and slow-service risks on frequently used paths.
Why use it?
It helps find designs that work at small scale but become slow, expensive, or unreliable as usage increases.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the manifest plugin — 28 skills, 15 commands shipped together

Good fit Use it to review queries for N+1 access, check whether growing data has limits or cleanup, and assess caching and slow-service risks on frequently used paths.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/iampawan/manifest/critic-scalability
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 iampawan/Manifest --skill critic-scalability
Clone the repo
git clone --depth 1 https://github.com/iampawan/Manifest

Made for: Claude Code.

Or install manifest, the plugin that ships this one along with the rest of its 28 skills, 15 commands.

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 critic-scalability

README.md
[![agentmods](https://agentmods.dev/badge/skills/iampawan/manifest/critic-scalability/github.svg)](https://agentmods.dev/skills/iampawan/manifest/critic-scalability)
Your own site
<a href="https://agentmods.dev/skills/iampawan/manifest/critic-scalability"><img src="https://agentmods.dev/badge/skills/iampawan/manifest/critic-scalability/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 critic-scalability

Your own site · 80×15
<a href="https://agentmods.dev/skills/iampawan/manifest/critic-scalability"><img src="https://agentmods.dev/badge/skills/iampawan/manifest/critic-scalability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 574 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 $0.00036 $0.00574
Opus 5 $0.00018 $0.00287
Sonnet 5 $0.00007 $0.00115
Haiku 4.5 $0.00004 $0.00057

Measured 9d ago against content hash 8e85975f6a1c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

critic-scalability 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 9d 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/critic-scalability/SKILL.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scalability critic

Protocol: Follow reference/CRITIC-RULES.md (the compact runtime rules) at the plugin root for severity definitions (the closed enum blocker/warning/info), the output JSON schema, ID prefixes, and shared anti-patterns. This skill defines only WHAT to look for. Do not invent severities like "high"/"medium" — the validator rejects them. Do not re-check anything the deterministic validator (scripts/validate.mjs) already covers; add the judgment layer on top.

You read for things that work fine at 100 users and break at 100K.

What to check

1. Query patterns

For each data-touching behavior:

  • Is the access pattern point lookups, range scans, or full scans?
  • Are there obvious N+1 risks (loop with per-item fetches)?
  • Are indexes implied by the access pattern?

2. Unbounded growth

  • Is there a list / collection that grows over time? (notifications, comments, history, sessions)
  • Is pagination, archival, or cap policy specified?
  • For event-sourced flows: is there a snapshot or compaction strategy?

3. Hot paths

  • Is this behavior invoked on a hot user surface (every page load, every API call)?
  • If yes: cache strategy spec'd? TTL? invalidation rules?

4. Concurrent writes

  • Does the behavior mutate shared state?
  • Conflict resolution: last-write-wins, optimistic locking, CRDT, queue?
  • Idempotency: can the same request be retried safely?

5. External dependencies

  • Does the behavior call out to a third-party in a synchronous user flow?
  • Timeout / retry strategy?
  • Circuit breaker?
  • What happens when the third-party is degraded vs down?

6. Background work

  • If a behavior triggers async work, is the queue/worker named?
  • Retry policy?
  • Dead-letter handling?
  • Are there expected throughput bounds?

7. Cost surface

  • Does the behavior trigger expensive operations (LLM calls, image generation, large transcoding)?
  • Cost per invocation? Cap per user / org?
  • Cost alerting?

Severity

Read the full file on GitHub · 77 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. 9d ago First seen · 77 lines · 36 tokens per session scan A 8e85975f6a1c

Subscribe to this mod's changes

critic-scalability is a skill published in the GitHub repository iampawan/Manifest (5 stars, last pushed 6d ago), licensed MIT. It adds 36 tokens to every session and 574 once invoked, about $0.0002 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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