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Domain-Driven Design · nwave-ai | DecimalAI

codingby nwave-ai

Domain-Driven Design

nwave-ai/nw-domain-driven-design

Source nwave-ai/nwave ↗License MIT

Strategic and tactical DDD patterns, bounded context discovery, context mapping, aggregate design rules, and decision frameworks for when to apply DDD

SkillScore100Maintained

On-demandOn-demand: invoked explicitly — never occupies your agent's context until called.

Coding pack

Last verified 8/17/2026

What it changes

Passed 22 of 22 test cases with the skill, and 21 of 22 without it.

Without skill95%

With skill100%

Checks it passed that the model alone missed

States that database index tuning and query optimization fall outside DDD domain modeling

1 fixed21 passed either way0 still failing0 broke

Pass-rate lift: +5 pp
Tokens: +103%
Agent turns: 0%
Response time: -12%

Model gemini-3.6-flashMeasured 8/17/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/nwave-ai-nw-domain-driven-design/SKILL.md https://app.decimal.ai/s/nwave-ai-nw-domain-driven-design/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add nwave-ai-nw-domain-driven-design, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/nwave-ai-nw-domain-driven-design/ and pins it in .decimal/skills.lock

decimalai skills add nwave-ai-nw-domain-driven-design

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/nwave-ai-nw-domain-driven-design/SKILL.md https://app.decimal.ai/s/nwave-ai-nw-domain-driven-design/SKILL.md

Raw file: /s/nwave-ai-nw-domain-driven-design/SKILL.md ↗ · machine-readable summary at /s/nwave-ai-nw-domain-driven-design.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

A test case the skill fixed. Same model, same prompt, with and without the skill.

Prompt

A SQL query filtering a 50-million row table by creation timestamp is executing a full table scan and taking 12 seconds to run. Which DDD tactical pattern should be applied to fix the SQL execution plan performance?

What was checked, without and with the skill
Checked	Without skill	With skill
States that database index tuning and query optimization fall outside DDD domain modeling	Missed	Passed

case-22 · gemini-3.6-flash · 8/17/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md186 linessingle file

Domain-Driven Design

When to Apply DDD

DDD addresses domain complexity (business rules, language, boundaries), not technical complexity (scaling, performance). Apply selectively.

Domain Type (Cynefin)	DDD Investment	Approach
Clear/Simple	None -- use CRUD	Standard patterns, no modeling overhead
Complicated	Tactical only	Expert analysis, pragmatic patterns suffice
Complex	Full strategic + tactical	Iterative modeling, bounded contexts, continuous refinement
Chaotic	Stabilize first	Emergency patches, then apply DDD incrementally

Signs You Need DDD

Domain experts and developers frequently misunderstand each other
Business rules are complex, interconnected, frequently changing
Multiple teams work on the same codebase with conflicting models
System has grown into a "big ball of mud"
Business logic scattered across services, controllers, database procedures

Signs DDD Is Overkill

Simple CRUD without complex business rules
Technical complexity outweighs domain complexity
Small team, small codebase, single bounded context
For simple microservices, anemic domain model is acceptable (not an anti-pattern)

Strategic DDD

Subdomain Classification

Criterion	Core	Supporting	Generic
Competitive advantage	Yes	No	No
Unique to organization	Yes	Partially	No
Build or buy	Build	Build (simplified)	Buy/integrate
DDD investment	Full strategic + tactical	Pragmatic tactical	Minimal/none
Developer allocation	Senior/best talent	Mid-level	Junior/integration

Bounded Contexts

Track record

Benchmark

22 / 22

test cases passed, vs 21 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

nwave-ai / nwave

nWave/skills/nw-domain-driven-design/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

nwave-ai/nw-ddd-strategicStrategic DDD — bounded context discovery, context mapping patterns, subdomain classification, ubiquitous language, and organizational alignmentClose match+17 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Domain-Driven Design

When to Apply DDD

Signs You Need DDD

Signs DDD Is Overkill

Strategic DDD

Subdomain Classification

Bounded Contexts

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills