workflow-methodology

A structured development workflow for deciding what to build, identifying the project, and setting up tracking and outputs. TDD means test-driven development, but this description does not say that the skill performs TDD.

In plain words
What is it for?
Use it at the beginning of a project to confirm the product, platform or technology stack, project name, and other required workflow details.
Why use it?
It prevents work from starting with an unclear project, goal, or technology choice. It pauses for missing information instead of guessing.

Skill for Claude CodeCodex

Part of the iterative-dev-workflow plugin — 1 skill, 10 commands shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/arsxxi/iterative-dev-workflow/workflow-methodology
Any agent
npx skills add Arsxxi/iterative-dev-workflow --skill workflow-methodology
Clone the repo
git clone --depth 1 https://github.com/Arsxxi/iterative-dev-workflow

Made for: Claude Code, Codex.

Or install iterative-dev-workflow, the plugin that ships this one along with the rest of its 1 skill, 10 commands.

Per session 2 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,615 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00002 $0.05615
Opus 5 $0.00001 $0.02808
Sonnet 5 $0.00000 $0.01123
Haiku 4.5 $0.00000 $0.00562

Measured 2d ago against content hash 807766b82824, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

workflow-methodology scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/workflow-methodology/SKILL.md · 563 lines

How it starts

The opening of the file, as written. The whole thing — 563 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Step 0 - figure out what we're building (do this FIRST, before anything else)

Look at what was passed in: $ARGUMENTS

  • If it already clearly states a project name, a real description of what to build, AND the platform/stack (e.g. "React Native non-Expo", "Python backend service", "LLM agent pipeline"), confirm your understanding back to me in one or two sentences and proceed to the section below.

  • If any of those three are missing or vague, stop and ask me:

    1. What are we building? (be as comprehensive as you want me to be - the more detail, the better Phase 1 will be)
    2. What platform/stack is this for? (e.g. mobile app - React Native/Expo/native, backend service, LLM/agent pipeline, web frontend, CLI tool, etc. - this changes what Phase 1's library/service analysis actually looks like)
    3. What short project name should identify it? (used for the .workflow/<slug>/ folder, e.g. article-quality-widget)

    Do not guess or invent a feature, and do not assume a default platform/stack (do not assume React Native or anything else) to analyze. Do not proceed past this point until I've answered.

Also ask (can be part of the same question round): what services/infra already exist in this project that Phase 1 should treat as "Existing Services" (e.g. a specific backend, database, auth provider, third-party APIs already wired up) - versus what's clearly new and would count as "Proposed Services". If I say I'm not sure or there's nothing existing yet, that's a valid answer - don't invent a services list.

Once you know the platform/stack and existing services, use them consistently for the rest of this workflow (Phase 1's library/package questions, Phase 2's architecture diagrams, etc. should all be framed for this specific project, not a generic or assumed one).

Step 1 - once we know what we're building

Here is the workflow we use for every feature, regardless of platform/stack:

  • Phase 1: Analyze - requirements, libraries/packages, Existing vs. Proposed services, 5 candidate development paths, ATAM + SQALE, final timeline.
  • Phase 2: Design - Solution Proposal (low-fidelity, divergent) -> ATAM -> Quality Attribute Assessment (weighted scoring, may loop back to the proposal bucket) -> High-Fidelity Design (System Context + User Flow diagrams in Mermaid.js).
  • Phase 3: Implement - build it, following the High-Fidelity Design.
  • Phase 4: Post-Mortem - retrospective.

Read the full file on GitHub · 563 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 563 lines · 2 tokens per session scan A 807766b82824

Subscribe to this mod's changes

workflow-methodology is a skill published in the GitHub repository Arsxxi/iterative-dev-workflow (2 stars, last pushed 1mo ago), licensed MIT. It adds 2 tokens to every session and 5,615 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.