start

A guided workflow for developing software with AI, covering requirements, planning, design, coding, testing, and running the finished system. It divides the work into stages with approval checks between them.

In plain words
What is it for?
Use it to take a software idea from requirements and user stories through implementation, testing, and operations.
Why use it?
It helps keep AI-assisted development structured and makes it clear when each stage is ready to continue. This reduces the chance of jumping into code before requirements or plans are agreed.

Skill for Claude CodeCodex

Part of the aidlc plugin — 1 skill 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/ijin/aidlc-cc-plugin/start
Any agent
npx skills add ijin/aidlc-cc-plugin --skill start
Clone the repo
git clone --depth 1 https://github.com/ijin/aidlc-cc-plugin

Made for: Claude Code, Codex.

Or install aidlc, the plugin that ships this one along with the rest of its 1 skill.

Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,570 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00050 $0.02570
Opus 5 $0.00025 $0.01285
Sonnet 5 $0.00010 $0.00514
Haiku 4.5 $0.00005 $0.00257

Measured 3d ago against content hash 22c46bee7599, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

start 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 3d 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.

skills/start/SKILL.md · 222 lines

The source is not reproduced here

Licensed MIT-0

The repository is licensed MIT-0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

32 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 222 lines · 50 tokens per session scan A 22c46bee7599

Subscribe to this mod's changes

start is a skill published in the GitHub repository ijin/aidlc-cc-plugin (21 stars, last pushed 2mo ago), licensed MIT-0. It adds 50 tokens to every session and 2,570 once invoked, about $0.0003 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 2026-08-30.

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