software-lifecycle

software-lifecycle is a skill for Claude Code, Codex from ApexIQ/skillsmith. It costs 28 tokens per session (492 once invoked), scanned A, original, MIT.

A software-development process for taking a feature or bug fix from discovery through design, coding, and verification. It includes TDD, or writing tests around new logic as part of development.

In plain words
What is it for?
Use it at the start of a feature or bug fix to search relevant skills, research existing patterns, create a plan, track work, write code, and run tests.
Why use it?
It reduces unplanned coding and regression risk by requiring research, a plan, small changes, and automated checks.

Skill for Claude CodeCodex

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/apexiq/skillsmith/software_lifecycle
Any agent
npx skills add ApexIQ/skillsmith --skill software_lifecycle
Clone the repo
git clone --depth 1 https://github.com/ApexIQ/skillsmith

Made for: Claude Code, Codex.

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 software-lifecycle

README.md
[![agentmods](https://agentmods.dev/badge/skills/apexiq/skillsmith/software_lifecycle.svg)](https://agentmods.dev/skills/apexiq/skillsmith/software_lifecycle)
Your own site
<a href="https://agentmods.dev/skills/apexiq/skillsmith/software_lifecycle"><img src="https://agentmods.dev/badge/skills/apexiq/skillsmith/software_lifecycle.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 492 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 $0.00028 $0.00492
Opus 5 $0.00014 $0.00246
Sonnet 5 $0.00006 $0.00098
Haiku 4.5 $0.00003 $0.00049

Measured 4d ago against content hash 96b50a635892, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

software-lifecycle 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 4d 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.

.agent/skills/software_lifecycle/SKILL.md · 54 lines

What it actually says

♾️ Software Lifecycle Strategy

Rule: We do not just "write code". We follow a rigorous engineering process to ensure quality and prevent regressions.

The Cycle

1. 🔍 Discovery & Skill Search (Search-then-GSD)

  • Rule: Before planning, SEARCH .agent/skills/ for the 2-3 most relevant skills.
  • Action:
    • Read the relevant skills to understand the "How-to".
    • Research existing code and patterns.
    • Check competitors and industry standards.
  • Deliverable: Orient yourself and update the project's PRD if scope changes.

2. 📝 Technical Design (RFC)

  • Rule: NEVER write code without a plan.
  • Action: Create an implementation plan or RFC document.
  • Review: Get approval for changes >20 lines or architectural decisions.

3. ⚡ Execution (The "Flow")

  • Action: Write code in small, testable chunks.
  • Rule: Track progress through a task list or issue tracker.
  • Rule: Follow TDD when writing new logic (see skill: test_driven_development).

4. 🛡️ Verification

  • Action: Run automated tests (unit, integration, E2E).
  • Action: Manual verification for UI/UX changes.
  • Deliverable: Create a walkthrough or demo if significant.

5. 📦 Documentation

  • Action: Update project status/changelog.
  • Action: Document new patterns in project documentation.

Examples

  • Feature Request: Discovery -> Plan (RFC) -> TDD (Red/Green) -> Commit -> Demo.
  • Bug Fix: Reproduce -> Write failing test -> Fix -> Commit.

Guidelines

  • Break large tasks into smaller subtasks.
  • If unsure, ask for clarification before building, not after.
  • Never skip the plan for changes >20 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. 4d ago First seen · 54 lines · 28 tokens per session scan A 96b50a635892

Subscribe to this mod's changes

software-lifecycle is a skill published in the GitHub repository ApexIQ/skillsmith (5 stars, last pushed 5mo ago), licensed MIT. It adds 28 tokens to every session and 492 once invoked, about $0.0001 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.

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