start

start is a skill for Claude Code, Codex from lantisprime/claude-sdlc. It costs 107 tokens per session (3,627 once invoked), scanned A, original, MIT.

Instructions for starting or re-enabling a software development workflow in a project. The workflow uses marker files and project checks to decide what setup is needed.

In plain words
What is it for?
Setting up the workflow, re-enabling it after suspension, detecting version control and continuous-integration tools, and accepting a new task.
Why use it?
It gives the agent a defined path for activating the workflow, detecting project tools, or handing an already enabled project to planning.

Skill for Claude CodeCodex

Part of the sdlc-plugin plugin — 19 skills, 16 commands, 10 agents, 4 hooks 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/lantisprime/claude-sdlc/start
Any agent
npx skills add lantisprime/claude-sdlc --skill start
Clone the repo
git clone --depth 1 https://github.com/lantisprime/claude-sdlc

Made for: Claude Code, Codex.

Or install sdlc-plugin, the plugin that ships this one along with the rest of its 19 skills, 16 commands, 10 agents, 4 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for start

README.md
[![agentmods](https://agentmods.dev/badge/skills/lantisprime/claude-sdlc/start.svg)](https://agentmods.dev/skills/lantisprime/claude-sdlc/start)
Your own site
<a href="https://agentmods.dev/skills/lantisprime/claude-sdlc/start"><img src="https://agentmods.dev/badge/skills/lantisprime/claude-sdlc/start.svg" alt="Measured on agentmods" height="20"></a>
Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,627 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 $0.00107 $0.03627
Opus 5 $0.00053 $0.01813
Sonnet 5 $0.00021 $0.00725
Haiku 4.5 $0.00011 $0.00363

Measured 3d ago against content hash d01de806b078, 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 · 382 lines

How it starts

The opening of the file, as written. The whole thing — 382 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Start — Opt-in Activation, Re-enable, and Task Intake

Read the marker state first. The path taken depends entirely on which marker files exist.

Marker state dispatch

State Condition Path
Fresh install .claude/sdlc/.enabled absent AND .claude/sdlc/.suspended absent Activate → Steps 0–4
Suspended .claude/sdlc/.suspended present Re-enable → Steps R1–R5
Already enabled .claude/sdlc/.enabled present Hand off to /plan

Check .claude/sdlc/.suspended first. If present, go to the re-enable path even if .enabled also somehow exists — .suspended wins.


PATH A — Fresh Install (Steps 0–4)

Step 0 — Config check and auto-detection

Skip this step entirely if config/tools.json already exists.

Run the following detections silently — no prompts, just observe:

Signal Detected value
.git directory vcs: "git"
git remote get-url origin repo slug (owner/repo)
.github/workflows present ci: "github-actions"
.gitlab-ci.yml present ci: "gitlab-ci"
.circleci/config.yml present ci: "circleci"
Jenkinsfile present ci: "jenkins"
package.json present language: "node"
pyproject.toml or requirements.txt language: "python"
go.mod present language: "go"
Cargo.toml present language: "rust"
pom.xml or build.gradle language: "java"
jest or vitest in devDependencies test.command
pytest in pyproject.toml test.command
eslint in devDependencies lint.command
ruff in pyproject.toml lint.command
Remote URL contains github.com tracker: "github"
Remote URL contains gitlab tracker: "gitlab"
Remote URL contains bitbucket tracker: "bitbucket"

Show detected values as facts, not questions. Then ask up to three prompts:

Prompt 1 — Tracker confirm (always shown, pre-selected if detected):

Issue tracker (inferred: GitHub Issues) — correct? [Y/n/override]

If remote is absent or ambiguous:

Which issue tracker does this project use?
A) GitHub Issues  B) GitLab  C) Jira  D) Linear  E) None
(detected: none) _

Read the full file on GitHub · 382 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. 3d ago First seen · 382 lines · 107 tokens per session scan A d01de806b078

Subscribe to this mod's changes

start is a skill published in the GitHub repository lantisprime/claude-sdlc (3 stars, last pushed 4mo ago), licensed MIT. It adds 107 tokens to every session and 3,627 once invoked, about $0.0005 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.