Agent skill

Lowy

by srid in srid/emanote

Evaluate architecture and module boundaries for volatility-based decomposition using Juval Lowy's framework (from "Righting Software", building on Parnas 1972).

Custom licenceAuto-check passedBackend & APIs

Install Lowy

skills CLI
$ npx skills add srid/emanote --skill lowy -a claude-code

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

GitHub CLI
$ gh skill install srid/emanote lowy --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/srid/emanote.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/lowy .claude/skills/lowy && 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
lowy
GitHub stars
963
Token cost
~6.2k tokens
SKILL.md length
3,402 words
Files
1
Skills in repo
25
Repo updated
First seen
Licence
Custom licence

At a glance

Evaluate architecture and module boundaries for volatility-based decomposition using Juval Lowy's framework (from "Righting Software", building on Parnas 1972).

  • Works in 7 steps: Name the Volatility → Classify the Volatility → Functional vs. Volatility Boundary → …
  • Reviewing module splits
  • SKILL.md covers Key Idea, Scope of Review, The Evaluation and Fact-Check Your Own Evaluation, plus 2 more sections
  • Calls git

What it does

Lowy is an agent skill from srid/emanote. Evaluate architecture and module boundaries for volatility-based decomposition using Juval Lowy's framework (from "Righting Software", building on Parnas 1972). Use when reviewing module splits, service boundaries, new abstractions, or any decomposition decision. Trigger on phrases like "where should this boundary be", "how to split this", "module boundaries", "encapsulate change", "volatility", or references to Lowy, Parnas, or "Righting Software". Complements /hickey (interleaved concerns) with a different lens…

Its SKILL.md is about 6.2k 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 Backend & APIs, covering Microservices. The repository describes itself as: Emanate a structured view of your plain-text notes.

When your agent uses it

  • Reviewing module splits
  • Service boundaries
  • New abstractions
  • Any decomposition decision

Example prompts

  • “s framework (from”
  • “where should this boundary be”
  • “how to split this”
  • “/lowy”

Workflow steps

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

  1. Name the Volatility
  2. Classify the Volatility
  3. Functional vs. Volatility Boundary
  4. Change Blast Radius
  5. Interface Stability
  6. Reuse Signal
  7. The Almost-Expendable Test

What it can do on your machine

Read from SKILL.md and the folder at commit 9d01037. 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

    Shell commands in SKILL.md call:

    • git

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

  • Network

    Links to these hosts (documentation or services it may open):

    • github.com
    • rightingsoftware.org
    • win.tue.nl
    • informit.com
    • kolu.dev

    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

Lowy loads about 6.2k tokens when it runs. Until then it costs about 137 tokens; SKILL.md has 3,402 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~137
When it runs · the whole SKILL.md, loaded when a task matches
~6.2k

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 3,402 words (~6,204 tokens).

“Evaluate module boundaries and decomposition decisions using Juval Lowy's volatility-based decomposition framework. The core question: do your boundaries encapsulate axes of change, or do they just group related functionality?”

— opening of SKILL.md by srid, Custom licence
name
lowy
context
fork
agent
Explore
model
sonnet

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/lowy of srid/emanote.

Open the folder on GitHubat commit 9d01037

Used in 1 other repository

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in srid/emanote, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Lowy 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.

Lowy compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Lowy this skillsrid/emanote963—~6.2kAutomated safety check: PassCustom licence
Node Backend Development Guidelinesdiet103/claude-code-infrastructure-showcase10k2 repos~2kAutomated safety check: PassMIT
Nodejs Backend Patternsever-works/ever-works15818 repos~4kAutomated safety check: PassAGPL-3.0
AWS Serverless Edazxkane/aws-skills3674 repos~3.2kAutomated safety check: PassMIT
Golang Proantoniopaya22/go-rest-template1723 repos~1.2kAutomated safety check: PassMIT
Dr Jskilljdubois/dr-jskill342—~4.6kAutomated safety check: NotesApache-2.0

Similar skills

  • Node Backend Development Guidelines

    diet103/claude-code-infrastructure-showcase

    Sets layered architecture and coding rules for Node.js, Express and TypeScript microservices, covering routes, controllers, services, repositories, Prisma, Sentry and Zod.

    10k GitHub starsUsed in 2 repos~2k tokens
    Backend & APIsAuto-check passed
  • Nodejs Backend Patterns

    ever-works/ever-works

    Build production-ready Node.js backend services with Express/Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best practices.

    158 GitHub starsUsed in 18 repos~4k tokens
    Backend & APIsAuto-check passed
  • AWS Serverless Eda

    zxkane/aws-skills

    AWS serverless and event-driven architecture expert based on Well-Architected Framework.

    367 GitHub starsUsed in 4 repos~3.2k tokens
    Backend & APIsAuto-check passed
  • Golang Pro

    antoniopaya22/go-rest-template

    Implements concurrent Go patterns using goroutines and channels, designs and builds microservices with gRPC or REST, optimizes Go application performance with pprof, and enforces idiomatic Go with…

    172 GitHub starsUsed in 3 repos~1.2k tokens
    Backend & APIsAuto-check passed
  • Dr Jskill

    jdubois/dr-jskill

    Creates Java + Spring Boot projects: Web applications, full-stack apps with Vue.js or Angular or React or vanilla JS, PostgreSQL, REST APIs, and Docker.

    342 GitHub stars~4.6k tokensUpdated 8 days ago
    Backend & APIsAuto-check: notes
  • Hybrid Cloud Test Gen

    getsentry/sentry

    Official

    Generate hybrid cloud tests for the Sentry codebase. An agent skill from getsentry/sentry.

    46k GitHub stars~2.6k tokensUpdated today
    Backend & APIsAuto-check passed

More from srid/emanote

All 25 skills in this repo
  • Codex Debate

    srid/emanote

    Run an automated codex⇄Claude debate to consensus — no round cap, no deadlock exit.

    963 GitHub stars~8.9k tokensUpdated 2 mo ago
    Auto-check passed
  • Do

    srid/emanote

    Do a task end-to-end — implement, PR, CI loop, ship. An agent skill from srid/emanote.

    963 GitHub stars~12k tokensUpdated 2 mo ago
    Auto-check passed
  • Be Review

    srid/emanote

    Run /be's review gauntlet SERIALLY — /lens-debate (lowy ⇄ hickey), then /codex-debate, then /simplify, then code-police, each editing and committing on the live branch in turn.

    963 GitHub stars~4.2k tokensUpdated 2 mo ago
    Auto-check passed
  • CI

    srid/emanote

    Reference for the odu runner — how to invoke a full pipeline, a single recipe, or a platform-pinned node, and how to attach to a live run, from a project whose CI odu runs.

    963 GitHub stars~2.4k tokensUpdated 2 mo ago
    Auto-check passed
  • Forge PR

    srid/emanote

    Write engaging PR titles and descriptions for any forge (GitHub today; Bitbucket planned).

    963 GitHub stars~2.6k tokensUpdated 2 mo ago
    Auto-check passed
  • Kolu

    srid/emanote

    Drive one AI agent from another through kolu's terminals: spawn a Claude Code / Codex / opencode session in a PTY, prompt it, watch the screen for its reply, read it, and prompt again — a…

    963 GitHub stars~2.4k tokensUpdated 2 mo ago
    Auto-check passed

Categories

Questions about Lowy

What does Lowy do?

Evaluate architecture and module boundaries for volatility-based decomposition using Juval Lowy's framework (from "Righting Software", building on Parnas 1972). Lowy is an agent skill from srid/emanote. Evaluate architecture and module boundaries for volatility-based decomposition using Juval Lowy's framework (from "Righting Software", building on Parnas 1972).

When should I use Lowy?

Lowy fits situations like: reviewing module splits; service boundaries; new abstractions; any decomposition decision.

How do I install Lowy in Claude Code?

Run `npx skills add srid/emanote --skill lowy -a claude-code`. Or copy the skill folder (.agents/skills/lowy in srid/emanote) into .claude/skills/lowy in your project. Claude Code loads it when a task matches its description.

How do I install Lowy in Codex?

Run `npx skills add srid/emanote --skill lowy -a codex`. Or copy the skill folder (.agents/skills/lowy in srid/emanote) into .agents/skills/lowy in your project. Codex loads it when a task matches its description.

Can I use Lowy 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 srid/emanote --skill lowy -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/lowy, .gemini/skills/lowy, .github/skills/lowy and .opencode/skills/lowy in your project.

What does Lowy need to run?

Going by SKILL.md and its folder, Lowy needs the command-line tools its instructions call (git).

Does Lowy access the network?

SKILL.md names 5 domains. As links in the text: github.com, rightingsoftware.org, win.tue.nl, informit.com and kolu.dev. This is read from the text; nothing was executed.

Is Lowy 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 Lowy use?

Lowy 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 Lowy use?

About 6.2k tokens (SKILL.md is roughly 25k 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 Lowy?

Skills that share tags, products or a category with Lowy: Node Backend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars), Nodejs Backend Patterns (ever-works/ever-works, 158 stars), AWS Serverless Eda (zxkane/aws-skills, 367 stars) and Golang Pro (antoniopaya22/go-rest-template, 172 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Lowy?

srid (a GitHub user) maintains it in srid/emanote, which has 963 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on July 26, 2026.

Source: srid/emanote on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.