CtrlK
BlogDocsLog inGet started
Tessl Logo
SkillPublic

nestjs-modular-monolith

Specialist in designing and implementing scalable modular monolith architectures using NestJS with DDD, Clean Architecture, and CQRS patterns. Use when building modular monolith backends, designing bounded contexts, creating domain modules, implementing event-driven module communication, or when user mentions "modular monolith", "bounded contexts", "module boundaries", "DDD", "CQRS", "clean architecture NestJS", or "monolith to microservices". Do NOT use for simple CRUD APIs, frontend work, general NestJS questions without architectural context, or stack-agnostic evolutionary modular monolith design (use evolutionary-modular-architecture).

Quality

91%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide
SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

77%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

Well-structured content with an excellent phased workflow, validation checkpoints, and clean progressive disclosure to bundled references. Its main weakness is length — several sections pad concepts Claude already knows.

Suggestions

Trim the 'Knowledge Reference' keyword list and condense the 10 'Core Principles' into a compact table; they restate domain knowledge Claude already has.

Move the detailed 'Behavioral Guidelines' prose into a reference file, keeping only the one-line directives inline in SKILL.md.

Add one minimal copy-paste NestJS module skeleton (module + one service + repository interface) so the implementation guidance is fully executable, not just structural.

DimensionReasoningScore

Conciseness

Mostly efficient with concrete structure, but ~290 lines include padding — the prose 'Core Principles' list, 'Behavioral Guidelines', and the terminal 'Knowledge Reference' keyword dump add tokens Claude doesn't need.

3 / 5

Actionability

Provides executable grep commands, a concrete NX module file tree, stack tables with rationale, and ordered output templates; minor gap is that NestJS module code is structural rather than copy-paste ready.

4 / 5

Workflow Clarity

Four phases (Discovery, Design, Implementation, Validation) are clearly sequenced with per-phase exit-criteria checklists and an explicit feedback loop ('If any check finds violations, fix them before proceeding').

5 / 5

Progressive Disclosure

Clear overview with a well-signaled Reference Guide table pointing one level deep to 6 real reference files plus validate-isolation.sh, each with a 'Load When' cue; navigation is easy.

5 / 5

Total

17

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, specific description that covers what the skill does, when to trigger it, and when not to, with natural user-facing keywords and explicit conflict-avoidance guidance. It avoids vague fluff and over-claims entirely.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'designing bounded contexts, creating domain modules, implementing event-driven module communication' — with comprehensive coverage of the skill's capabilities.

5 / 5

Completeness

Explicitly answers both what ('designing and implementing scalable modular monolith architectures using NestJS with DDD, Clean Architecture, and CQRS') and when ('Use when building... or when user mentions...') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Comprehensive natural trigger terms a target user would say: 'modular monolith', 'bounded contexts', 'module boundaries', 'DDD', 'CQRS', 'clean architecture NestJS', 'monolith to microservices'.

5 / 5

Distinctiveness Conflict Risk

Clear NestJS modular-monolith niche with explicit 'Do NOT use for...' guidance that redirects overlapping cases to 'evolutionary-modular-architecture', minimizing conflict risk.

5 / 5

Total

20

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

tech-leads-club/agent-skills

Path

packages/skills-catalog/skills/(development)/nestjs-modular-monolith/SKILL.md

Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.