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Agent skill

Mcaf Nfr

by managedcode in managedcode/Storage

Capture or refine non-functional requirements such as accessibility, reliability, scalability, maintainability, performance, and compliance.

MITAuto-check passedAgent Workflows

Install Mcaf Nfr

skills CLI
$ npx skills add managedcode/Storage --skill mcaf-nfr -a claude-code

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

GitHub CLI
$ gh skill install managedcode/Storage mcaf-nfr --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/managedcode/Storage.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/mcaf-nfr .claude/skills/mcaf-nfr && 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
mcaf-nfr
GitHub stars
138
Token cost
~959 tokens
SKILL.md length
470 words
Files
15 (incl. references)
Skills in repo
41
Repo updated
First seen
Licence
MIT

At a glance

Capture or refine non-functional requirements such as accessibility, reliability, scalability, maintainability, performance, and compliance.

  • Works in 3 steps: Read the nearest AGENTS.md and confirm… → Run this skill's Workflow through the… → Return the Required Result Format with…
  • Architecture change needs explicit quality attributes and trade-offs
  • SKILL.md covers Trigger On, Value, Do Not Use For and Inputs, plus 7 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Mcaf Nfr is an agent skill from managedcode/Storage. Capture or refine non-functional requirements such as accessibility, reliability, scalability, maintainability, performance, and compliance. Use when a feature or architecture change needs explicit quality attributes and trade-offs.

Its SKILL.md is about 960 tokens, which your agent loads only when the skill is triggered. The skill folder holds 15 other files, including reference files (for example `references/accessibility.md`, `references/availability.md` and `references/capacity.md`). Compatibility notes: Requires repository access when NFRs are documented in feature docs, ADRs, or architecture docs.

It sits in Agent Workflows. The repository describes itself as: Storage library provides a universal interface for accessing and manipulating data in different cloud blob storage providers. The licence is MIT.

When your agent uses it

  • Architecture change needs explicit quality attributes and trade-offs

Example prompts

  • “/mcaf-nfr”

Requirements

  • Compatibility (from SKILL.md): Requires repository access when NFRs are documented in feature docs, ADRs, or architecture docs.

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Read the nearest AGENTS.md and confirm scope and constraints.
  2. Run this skill's Workflow through the Ralph Loop until outcomes are acceptable.
  3. Return the Required Result Format with concrete artifacts and verification evidence.

What it can do on your machine

Read from SKILL.md and the folder at commit 5d32121. 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.

  • Compatibility

    Requires repository access when NFRs are documented in feature docs, ADRs, or architecture docs.

    From compatibility in the SKILL.md frontmatter.

Context cost

Mcaf Nfr loads about 959 tokens when it runs, and up to ~6.8k if it reads all its reference files. Until then it costs about 60 tokens; SKILL.md has 470 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~60
When it runs · the whole SKILL.md, loaded when a task matches
~959
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.8k

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

The full file from managedcode/Storage at commit 5d32121, republished under its MIT licence (© managedcode). 470 words, ~959 tokens.

Download SKILL.mdSave it as .claude/skills/mcaf-nfr/SKILL.md (or your agent's skills folder). This skill also uses 14 other files; get the full folder from GitHub.
name
mcaf-nfr
description
Capture or refine non-functional requirements such as accessibility, reliability, scalability, maintainability, performance, and compliance. Use when a feature or architecture change needs explicit quality attributes and trade-offs.
compatibility
Requires repository access when NFRs are documented in feature docs, ADRs, or architecture docs.

MCAF: Non-Functional Requirements

Trigger On

  • a feature or architecture change needs explicit quality attributes
  • a team is using vague words like "fast", "reliable", or "secure" without measurable meaning
  • docs, ADRs, and tests are out of sync on quality expectations

Value

  • produce a concrete project delta: code, docs, config, tests, CI, or review artifact
  • reduce ambiguity through explicit planning, verification, and final validation skills
  • leave reusable project context so future tasks are faster and safer

Do Not Use For

  • generic architecture or feature writing with no quality-attribute decision
  • loading all NFR references at once

Inputs

  • the changed feature, boundary, or rollout path
  • the quality attributes that materially affect it
  • current docs, ADRs, tests, and ops expectations

Quick Start

  1. Read the nearest AGENTS.md and confirm scope and constraints.
  2. Run this skill's Workflow through the Ralph Loop until outcomes are acceptable.
  3. Return the Required Result Format with concrete artifacts and verification evidence.

Workflow

  1. Decide which quality attributes materially affect the change.
  2. Turn vague goals into explicit requirements, constraints, or testable expectations.
  3. Link NFRs to feature docs, ADRs, and verification when they affect design or rollout.
  4. Use only the specific reference files that match the active quality attribute.

Deliver

  • explicit NFRs for the changed area
  • docs or ADRs that describe measurable quality attributes
  • better alignment between architecture, testing, and operations

Validate

  • each chosen NFR is measurable or at least falsifiable
  • the selected attributes are the ones that actually drive design trade-offs
  • verification and operational expectations are linked where needed
Show full SKILL.md (218 more words)Show less

Ralph Loop

Use the Ralph Loop for every task, including docs, architecture, testing, and tooling work.

  1. Plan first (mandatory):
    • analyze current state
    • define target outcome, constraints, and risks
    • write a detailed execution plan
    • list final validation skills to run at the end, with order and reason
  2. Execute one planned step and produce a concrete delta.
  3. Review the result and capture findings with actionable next fixes.
  4. Apply fixes in small batches and rerun the relevant checks or review steps.
  5. Update the plan after each iteration.
  6. Repeat until outcomes are acceptable or only explicit exceptions remain.
  7. If a dependency is missing, bootstrap it or return status: not_applicable with explicit reason and fallback path.
Required Result Format
  • status: complete | clean | improved | configured | not_applicable | blocked
  • plan: concise plan and current iteration step
  • actions_taken: concrete changes made
  • validation_skills: final skills run, or skipped with reasons
  • verification: commands, checks, or review evidence summary
  • remaining: top unresolved items or none

For setup-only requests with no execution, return status: configured and exact next commands.

Load References

  • pick only the exact file for the active NFR: accessibility, reliability, performance, scalability, compliance, maintainability, and so on

Example Requests

  • "Make the non-functional requirements explicit for this feature."
  • "Turn vague reliability goals into real constraints."
  • "Document performance and compliance expectations for this service."

© managedcode, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 14 other files (references) in .codex/skills/mcaf-nfr of managedcode/Storage.

  • SKILL.md
  • references/accessibility.md
  • references/availability.md
  • references/capacity.md
  • references/compliance.md
  • references/data-integrity.md
  • references/disaster-recovery.md
  • references/internationalization.md
  • references/interoperability.md
  • references/maintainability.md
  • references/performance.md
  • references/portability.md
  • references/reliability.md
  • references/scalability.md
  • references/usability.md

Open the folder on GitHubat commit 5d32121

Compare with similar skills

Mcaf Nfr 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.

Mcaf Nfr compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Mcaf Nfr this skillmanagedcode/Storage138—~959Automated safety check: PassMIT
Htmlvspecdisler/pi-agent-observability145—~4.7kAutomated safety check: NotesMIT
Rtl Aware DevelopmentSeeRay11/OpenFlow108—~1kAutomated safety check: PassMIT
Agent Instructionsmurphytrueman/design-system-ops203—~2.3kAutomated safety check: PassMIT
Planning With Files DeOthmanAdi/planning-with-files27k—~3.7kAutomated safety check: NotesMIT
Cp Exploretangziwen/CubeMiniGame359—~535Automated safety check: PassMIT

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Categories

Questions about Mcaf Nfr

What does Mcaf Nfr do?

Capture or refine non-functional requirements such as accessibility, reliability, scalability, maintainability, performance, and compliance. Mcaf Nfr is an agent skill from managedcode/Storage. Capture or refine non-functional requirements such as accessibility, reliability, scalability, maintainability, performance, and compliance.

When should I use Mcaf Nfr?

Mcaf Nfr fits situations like: architecture change needs explicit quality attributes and trade-offs.

How do I install Mcaf Nfr in Claude Code?

Run `npx skills add managedcode/Storage --skill mcaf-nfr -a claude-code`. Or copy the skill folder (.codex/skills/mcaf-nfr in managedcode/Storage) into .claude/skills/mcaf-nfr in your project. Claude Code loads it when a task matches its description.

How do I install Mcaf Nfr in Codex?

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

Can I use Mcaf Nfr 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 managedcode/Storage --skill mcaf-nfr -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mcaf-nfr, .gemini/skills/mcaf-nfr, .github/skills/mcaf-nfr and .opencode/skills/mcaf-nfr in your project.

What does Mcaf Nfr need to run?

SKILL.md names no scripts, command-line tools or credentials: Mcaf Nfr is instructions for the agent only. Compatibility (from SKILL.md): Requires repository access when NFRs are documented in feature docs, ADRs, or architecture docs..

Does Mcaf Nfr 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 Mcaf Nfr 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 Mcaf Nfr use?

Mcaf Nfr is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Mcaf Nfr use?

About 959 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 5.8k tokens, read only when the agent opens those files.

What are the alternatives to Mcaf Nfr?

Skills that share tags, products or a category with Mcaf Nfr: Htmlvspec (disler/pi-agent-observability, 145 stars), Rtl Aware Development (SeeRay11/OpenFlow, 108 stars), Agent Instructions (murphytrueman/design-system-ops, 203 stars) and Planning With Files De (OthmanAdi/planning-with-files, 27k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Mcaf Nfr?

managedcode (a GitHub organization) maintains it in managedcode/Storage, which has 138 GitHub stars. The repository holds 41 skills in this directory. The repository was last updated on October 7, 2026.

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