specs.md vs Kiro (AWS)

Compare specs.md with AWS Kiro IDE

Overview

Kiro is AWS’s agentic IDE built on Code OSS (VS Code foundation) with integrated spec-driven development, agent hooks, and deep AWS integration. To use Kiro’s spec-driven features, you must use their paid IDE—there’s no way to use the methodology with your preferred tools.

specs.md is an IDE-agnostic framework implementing AWS’s AI-DLC methodology. It works with 11+ AI coding tools including Claude Code, Cursor, GitHub Copilot, Windsurf, and more. Your specs and agents are portable markdown files—no vendor lock-in.

Available Now: specs.md (Simple Flow) provides Kiro-style Requirements → Design → Tasks workflow.

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Side-by-Side Comparison

Aspect	specs.md	Kiro
Type	Framework/CLI	Full IDE
IDE	Works with any (Cursor, VS Code, Claude Code, etc.)	Kiro IDE only
Workflow	AI-DLC: Inception → Construction → Operations	Requirements → Design → Tasks
Methodology	Formal AI-DLC phases and rituals	Kiro SDD workflow
Automation	Skills + Templates	Agent Hooks + Steering
Context	Memory Bank (persistent project knowledge)	requirements.md, design.md, tasks.md + steering files
AI Model	Any (Claude, GPT, Gemini, etc.)	Claude Sonnet 4.5 + Auto mode
Pricing	Free (open source)	Free preview → $20/mo (Pro),$39/mo (Pro+), $200/mo (Power)
Spec Format	Markdown + YAML	EARS notation for requirements
Lock-in	None	Kiro IDE + Claude only
VS Code Extension	Yes (visual dashboard)	Built into IDE (limited)
Maturity	Production-ready	Preview (July 2025)

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When to Choose Each

Choose specs.md (AI-DLC) if:

• You want IDE flexibility (not locked to Kiro)
• You prefer AI-DLC’s formal 3-phase methodology
• You want to use your preferred AI model
• You want to use free AI tools (Copilot, Cline, Kilo Code, etc.)
• You need Mob rituals for team collaboration
• You want DDD as an integral part
• You want a VS Code extension to track progress visually

Choose Kiro if:

• You want an all-in-one IDE experience
• You’re heavily invested in AWS ecosystem
• You want built-in agent hooks for automation
• You prefer visual spec generation
• You’re okay with Claude Sonnet only
• You’re okay with subscription pricing

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Key Differences

1. IDE Lock-in (Paid)

Kiro: Requires Kiro IDE subscription ($19-39/month) to use spec-driven features. You cannot use Kiro’s methodology in VS Code, Cursor, or other editors.

specs.md: Works with 11+ tools including Claude Code, Cursor, GitHub Copilot, Windsurf, Cline, Roo, Gemini CLI, Codex CLI, OpenCode, and more. Your specs are portable markdown files—switch tools anytime.

2. AI Model Flexibility

Kiro: Uses Claude Sonnet 4.5 with an “Auto” mode that mixes frontier models. No option to use GPT, Gemini, or bring your own API key.

specs.md: Works with any AI model. Use whichever model works best for your use case.

3. Pricing Model

Kiro (revised August 2025):

• Free: 50 vibe requests (no spec requests)
• Pro: $20/month (225 vibe, 125 spec requests)
• Pro+: $39/month (450 vibe, 250 spec requests)
• Power: $200/month (2,250 vibe, 1,250 spec requests)

specs.md:

• Free (open source)
• Pay only for your AI API tokens

4. Context Management

Kiro uses simple spec files + steering:

.kiro/
├── requirements.md   # Requirements spec
├── design.md         # Design spec
├── tasks.md          # Task breakdown
└── steering/         # Agent steering files

specs.md uses Memory Bank:

memory-bank/
├── context-config.yaml    # Phase-aware context
├── artifacts/             # Persistent artifacts
└── standards/             # Project standards

5. Automation Approach

Kiro uses Agent Hooks (event-driven):

# .kiro/hooks/update-tests.yaml
trigger: on_save
pattern: "**/*.tsx"
action: "Update related test file"

specs.md uses Skills and Templates:

# skills/construction/domain-modeling.yaml
name: Domain Modeling
triggers:
  - bolt-start
  - domain-design
actions:
  - Apply DDD principles
  - Generate component model

Available Now: specs.md (Simple Flow) provides Kiro-style Requirements → Design → Tasks workflow.

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Feature Comparison

Kiro’s Unique Features

Feature	Description
EARS Notation	Structured requirements format
Agent Hooks	Event-driven automations on file save/create
MCP Integration	Connect external tools via Model Context Protocol
Autopilot Mode	AI works autonomously on foundational tasks
AWS Powers	One-click AWS service integrations

specs.md Unique Features

Feature	Description
Mob Rituals	Collocated team collaboration with AI
DDD as Core	Domain-driven design integrated, not optional
Phase-Based Agents	3 agents aligned to AI-DLC phases
Bolts	Rapid iteration cycles (hours/days, not weeks)
IDE Freedom	Works with any IDE and AI model
VS Code Extension	Visual dashboard for tracking bolts, specs, and progress

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Cost Comparison

Tool	Cost
specs.md	$0 + API tokens
Kiro Pro	$20/month (225 vibe + 125 spec/mo)
Kiro Pro+	$39/month (450 vibe + 250 spec/mo)
Kiro Power	$200/month (2,250 vibe + 1,250 spec/mo)

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Migration Path

If you’re using Kiro and want more methodology structure:

1. Export Kiro Specs

   Convert Kiro’s requirements.md, design.md, tasks.md to specs.md Memory Bank format

2. Map Hooks to Skills

   Convert agent hooks to specs.md skills (or wait for Simple Flow with hook support)

3. Adopt AI-DLC Phases

   Organize work into Inception, Construction, Operations

4. Add Mob Rituals

   Introduce Mob Elaboration and Mob Construction for team alignment

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Summary

For This Need	Use This
IDE flexibility	specs.md
All-in-one IDE	Kiro
AI model choice	specs.md
AWS deep integration	Kiro
Free/open source	specs.md
Built-in agent hooks	Kiro (or wait for specs.md Simple Flow)
Formal methodology	specs.md
Mob rituals	specs.md

Bottom Line: Kiro offers a polished, all-in-one experience with AWS integration. specs.md offers methodology depth, IDE freedom, and no subscription costs.

Want Kiro’s simplicity with AI-DLC’s methodology? Try specs.md (Simple Flow).