design

A command for designing software architecture, APIs, components, or database structures. An API is the defined way that software parts communicate with each other.

In plain words
What is it for?
Use it to plan system architecture, define API interfaces, design reusable components, or describe database schemas, with output as a diagram, specification, or code.
Why use it?
It turns a design request into a detailed specification or diagram, while relying on the required compound-engineering plugin for the underlying planning work.

Command

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.

agentmods
npx agentmods add commands/drag88/claude-dev-framework/design
Clone the repo
git clone --depth 1 https://github.com/drag88/claude-dev-framework
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 247 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00012 $0.00247
Opus 5 $0.00006 $0.00123
Sonnet 5 $0.00002 $0.00049
Haiku 4.5 $0.00001 $0.00025

Measured yesterday against content hash ad083f79bba6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

design 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 yesterday.

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.

commands/design.md · 29 lines

What it actually says

/cdf:design - System and Component Design

Triggers

  • Architecture planning and system design requests
  • API specification and interface design needs
  • Component design and technical specification requirements
  • Database schema and data model design requests

Context Trigger Pattern

/cdf:design [target] [--type architecture|api|component|database] [--format diagram|spec|code]

Delegation: compound-engineering

This command delegates to the compound-engineering:ce-plan host skill.

Requires: the compound-engineering plugin. If it is not installed, stop and tell the user to install the compound-engineering plugin for their host (install commands are in the README) — do not improvise a replacement flow.

Flow: Invoke the compound-engineering:ce-plan host skill, passing the user's arguments and any flags as context.

CDF constraints (bind on top of the skill):

  • Plan documentation lands in docs/plans/.
  • When the request is a pure architecture or API specification, include that framing in the context passed to the skill.
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. yesterday First seen · 29 lines · 12 tokens per session scan A ad083f79bba6

Subscribe to this mod's changes

design is a command published in the GitHub repository drag88/claude-dev-framework (2 stars, last pushed 1mo ago), licensed MIT. It adds 12 tokens to every session and 247 once invoked, about $0.0001 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.