spec-design

A command for writing a technical design document for a software feature. It uses a requirements file and project guidance, and can create, merge, overwrite, or require approval for the design.

In plain words
What is it for?
Use it to turn approved feature requirements into an architecture and implementation plan stored with the project.
Why use it?
It prevents design work from starting without approved requirements and keeps the design tied to the repository's existing constraints.

Command for Claude Code

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/kbwo/ccmanager/spec-design
Clone the repo
git clone --depth 1 https://github.com/kbwo/ccmanager

Made for: Claude Code.

Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,015 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 $0.00007 $0.04015
Opus 5 $0.00003 $0.02008
Sonnet 5 $0.00001 $0.00803
Haiku 4.5 $0.00001 $0.00402

Measured 2d ago against content hash d60fbd93acae, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

spec-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 2d 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.

.claude/commands/kiro/spec-design.md · 459 lines

How it starts

The opening of the file, as written. The whole thing — 459 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Technical Design

Generate a technical design document for feature $1.

Task: Create Technical Design Document

1. Prerequisites & File Handling

  • Requirements Approval Check:
    • If invoked with -y ($2 == "-y"), set requirements.approved=true in spec.json
    • Otherwise, stop with an actionable message if requirements are missing or unapproved
  • Design File Handling:
    • If design.md does not exist: Create new design.md file
    • If design.md exists: Interactive prompt with options:
      • [o] Overwrite: Generate completely new design document
      • [m] Merge: Generate new design document using existing content as reference context
      • [c] Cancel: Stop execution for manual review
  • Context Loading: Read .kiro/specs/$1/requirements.md, core steering documents, and existing design.md (if merge mode)

2. Discovery & Analysis Phase

CRITICAL: Before generating the design, conduct thorough research and analysis:

Feature Classification & Process Adaptation

Classify feature type to adapt process scope:

  • New Feature (greenfield): Full process including technology selection and architecture decisions
  • Extension (existing system): Focus on integration analysis, minimal architectural changes
  • Simple Addition (CRUD, UI): Streamlined process, follow established patterns
  • Complex Integration (external systems, new domains): Comprehensive analysis and risk assessment

Process Adaptation: Skip or streamline analysis steps based on classification above

A. Requirements to Technical Components Mapping
  • Map requirements (EARS format) to technical components
  • Extract non-functional requirements (performance, security, scalability)
  • Identify core technical challenges and constraints
B. Existing Implementation Analysis

MANDATORY when modifying or extending existing features:

  • Analyze codebase structure, dependencies, patterns
  • Map reusable modules, services, utilities
  • Understand domain boundaries, layers, data flow
  • Determine extension vs. refactor vs. wrap approach
  • Prioritize minimal changes and file reuse

Read the full file on GitHub · 459 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. 2d ago First seen · 459 lines · 7 tokens per session scan A d60fbd93acae

Subscribe to this mod's changes

spec-design is a command published in the GitHub repository kbwo/ccmanager (1,229 stars, last pushed 2d ago), licensed MIT. It adds 7 tokens to every session and 4,015 once invoked, about $0.0000 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 2026-08-30.