Official agent skill

Architecture Review

by DataDog in DataDog/dd-trace-js

A skill your agent uses when a dd-trace-js change introduces or substantially changes a class hierarchy, module boundary, shared helper layer, public API, or duplicated behavior across multiple types.

OfficialCustom licenceAuto-check passedDevelopment

Install Architecture Review

skills CLI
$ npx skills add DataDog/dd-trace-js --skill architecture-review -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install DataDog/dd-trace-js architecture-review --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/DataDog/dd-trace-js.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/architecture-review .claude/skills/architecture-review && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
architecture-review
GitHub stars
837
Token cost
~1.1k tokens
SKILL.md length
500 words
Files
1
Skills in repo
7
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when a dd-trace-js change introduces or substantially changes a class hierarchy, module boundary, shared helper layer, public API, or duplicated behavior across multiple types.

  • Works in 6 steps: Drift prevention → Module coupling → Explicit contracts → …
  • A dd-trace-js change introduces
  • SKILL.md covers Workflow, Six Dimensions, Decision Rules and Review Output
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Architecture Review is an agent skill from DataDog/dd-trace-js, published by the product's own GitHub organization. Use when a dd-trace-js change introduces or substantially changes a class hierarchy, module boundary, shared helper layer, public API, or duplicated behavior across multiple types. Triggers: architecture decision, design review, refactor shared behavior, new abstraction, composition versus inheritance, expose internals, module coupling, public surface, hot-path architecture, score the design.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Software architecture, Design review and critique and Refactoring. It works with Datadog. The repository describes itself as: Datadog APM client for Node.js.

When your agent uses it

  • A dd-trace-js change introduces
  • Substantially changes a class hierarchy
  • Module boundary
  • Shared helper layer

Example prompts

  • “/architecture-review”

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Drift prevention
  2. Module coupling
  3. Explicit contracts
  4. Testability at boundaries
  5. Extensibility
  6. Hot-path fitness

What it can do on your machine

Read from SKILL.md and the folder at commit cb4024b. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Architecture Review loads about 1.1k tokens when it runs. Until then it costs about 104 tokens; SKILL.md has 500 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~104
When it runs · the whole SKILL.md, loaded when a task matches
~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 500 words (~1,058 tokens).

“Use this skill before implementing a non-trivial structural change. Do not use it for a local bug fix or a small refactor whose boundaries and contracts remain unchanged.”

— opening of SKILL.md by DataDog, Custom licence
name
architecture-review

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/architecture-review of DataDog/dd-trace-js.

Open the folder on GitHubat commit cb4024b

Compare with similar skills

Architecture Review next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Architecture Review compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Architecture Review this skillDataDog/dd-trace-js837—~1.1kAutomated safety check: PassCustom licence
Architecture PatternsKartikLabhshetwar/better-shot2.4k2 repos~1.4kAutomated safety check: PassCustom licence
Software Design Philosophyluoling8192/software-design-philosophy-skill346—~3.4kAutomated safety check: PassMIT
Brooks Audithyhmrright/brooks-lint1.5k1 repos~537Automated safety check: PassMIT
Software Design Reviewatilladeniz/Kubeli387—~5.3kAutomated safety check: PassMIT
Birdview ReviewQiuner/birdview727—~580Automated safety check: PassMIT

Similar skills

  • Architecture Patterns

    KartikLabhshetwar/better-shot

    Deep dive into software architecture for macOS. An agent skill from KartikLabhshetwar/better-shot.

    2.4k GitHub starsUsed in 2 repos~1.4k tokens
    DevelopmentAuto-check passed
  • Software Design Philosophy

    luoling8192/software-design-philosophy-skill

    Software design philosophy guide based on John Ousterhout's "A Philosophy of Software Design." Use this skill during: code reviews, architecture discussions, API design, module decomposition…

    346 GitHub stars~3.4k tokensUpdated 3 mo ago
    DevelopmentAuto-check passed
  • Brooks Audit

    hyhmrright/brooks-lint

    Architecture audit that maps module dependencies, checks layering integrity, and flags structural decay across a codebase, drawing on twelve classic engineering books.

    1.5k GitHub starsUsed in 1 repo~537 tokens
    DevelopmentAuto-check passed
  • Software Design Review

    atilladeniz/Kubeli

    Analyzes code based on John Ousterhout's "A Philosophy of Software Design".

    387 GitHub stars~5.3k tokensUpdated 4 days ago
    DevelopmentAuto-check passed
  • Birdview Review

    Qiuner/birdview

    Review and improve codebase architecture with source-backed current/proposed diagrams, tradeoffs and verification.

    727 GitHub stars~580 tokensUpdated today
    DevelopmentAuto-check passed
  • Py Rig

    mudrii/hermesd

    A skill your agent uses when building, reviewing, or refactoring Python code that requires strong maintainability discipline: SRP, DRY, OCP, explicit dependency injection, TDD/ATDD workflow, strict…

    118 GitHub stars~6.3k tokensUpdated yesterday
    DevelopmentAuto-check passed

More from DataDog/dd-trace-js

  • Apm Integrations

    DataDog/dd-trace-js

    Official

    A skill your agent uses when adding, debugging, fixing, or modifying instrumentation and plugins for third-party libraries in dd-trace-js.

    837 GitHub stars~3k tokensUpdated today
    Auto-check passed
  • Llmobs Testing

    DataDog/dd-trace-js

    Official

    A skill your agent uses when writing, modifying, or debugging tests for an LLMObs plugin in dd-trace-js.

    837 GitHub stars~2k tokensUpdated today
    Auto-check passed
  • Llmobs Integration

    DataDog/dd-trace-js

    Official

    A skill your agent uses when adding, debugging, or modifying LLMObs plugins for an LLM library in dd-trace-js.

    837 GitHub stars~1.4k tokensUpdated today
    Auto-check passed
  • Serverless Integrations

    DataDog/dd-trace-js

    Official

    A skill your agent uses when adding, modifying, debugging, or reviewing dd-trace-js serverless platform integrations that create root invocation spans for AWS Lambda, Azure Functions, Google Cloud…

    837 GitHub stars~1.1k tokensUpdated today
    Auto-check passed
  • Flaky Test Fixer

    DataDog/dd-trace-js

    Official

    A skill your agent uses when classifying, investigating, or fixing a suspected flaky test, intermittent test result, nondeterministic CI test failure, timing race, hang, or test-order dependency in…

    837 GitHub stars~1.6k tokensUpdated today
    Auto-check passed
  • Test Optimization Testing

    DataDog/dd-trace-js

    Official

    Validate v5 compatibility when adding or modifying Test Optimization or test framework integration tests in dd-trace-js.

    837 GitHub stars~492 tokensUpdated today
    Auto-check passed

Works with

Categories

Questions about Architecture Review

What does Architecture Review do?

A skill your agent uses when a dd-trace-js change introduces or substantially changes a class hierarchy, module boundary, shared helper layer, public API, or duplicated behavior across multiple types. Architecture Review is an agent skill from DataDog/dd-trace-js, published by the product's own GitHub organization. Use when a dd-trace-js change introduces or substantially changes a class hierarchy, module boundary, shared helper layer, public API, or duplicated behavior across multiple types.

When should I use Architecture Review?

Architecture Review fits situations like: A dd-trace-js change introduces; substantially changes a class hierarchy; module boundary; shared helper layer.

How do I install Architecture Review in Claude Code?

Run `npx skills add DataDog/dd-trace-js --skill architecture-review -a claude-code`. Or copy the skill folder (.agents/skills/architecture-review in DataDog/dd-trace-js) into .claude/skills/architecture-review in your project. Claude Code loads it when a task matches its description.

How do I install Architecture Review in Codex?

Run `npx skills add DataDog/dd-trace-js --skill architecture-review -a codex`. Or copy the skill folder (.agents/skills/architecture-review in DataDog/dd-trace-js) into .agents/skills/architecture-review in your project. Codex loads it when a task matches its description.

Can I use Architecture Review in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add DataDog/dd-trace-js --skill architecture-review -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/architecture-review, .gemini/skills/architecture-review, .github/skills/architecture-review and .opencode/skills/architecture-review in your project.

What does Architecture Review need to run?

SKILL.md names no scripts, command-line tools or credentials: Architecture Review is instructions for the agent only.

Does Architecture Review access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Architecture Review safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Architecture Review use?

Architecture Review has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Architecture Review use?

About 1.1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Architecture Review?

Skills that share tags, products or a category with Architecture Review: Architecture Patterns (KartikLabhshetwar/better-shot, 2.4k stars), Software Design Philosophy (luoling8192/software-design-philosophy-skill, 346 stars), Brooks Audit (hyhmrright/brooks-lint, 1.5k stars) and Software Design Review (atilladeniz/Kubeli, 387 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Architecture Review?

DataDog (a GitHub organization, an official publisher) maintains it in DataDog/dd-trace-js, which has 837 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 9, 2026.

Source: DataDog/dd-trace-js on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.