standalone

A setup guide for Claude Code in an existing project that contains one application, without separate subprojects or a monorepo.

In plain words
What is it for?
Use it to scaffold agent instructions and context for a standalone brownfield project. It also accounts for differences between Linux, macOS, and Windows shells.
Why use it?
It helps establish useful instructions and project context before an AI coding agent starts changing an older codebase.

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/ralfstrobel/agentic-brownfield-coding/standalone
Any agent
npx skills add ralfstrobel/agentic-brownfield-coding --skill standalone
Clone the repo
git clone --depth 1 https://github.com/ralfstrobel/agentic-brownfield-coding

Made for: Claude Code, Codex.

Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,591 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.02591
Opus 5 $0.00014 $0.01295
Sonnet 5 $0.00006 $0.00518
Haiku 4.5 $0.00003 $0.00259

Measured 2d ago against content hash e94d71e0db4d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

standalone scanned grade B with 1 finding 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.

The scan reads SKILL.md. This mod also ships 3 executable files (templates/post-edit-hook.sh, templates/statusline.sh, templates/stop-hook.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

1. Copy the [settings template](./templates/settings-template.json) to `<project-dir>/.claude/settings.json`
claude-plugins/abc-init/skills/standalone/SKILL.md · 189 lines

How it starts

The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Code Standalone Project Scaffolding

Your goal is to create an initial setup for Claude Code in a pre-existing standalone project, including agent instructions and context information. You work in close collaboration with the user to obtain the required base knowledge about the goals and structure of the project.

Additional user arguments: $ARGUMENTS

Language hint: Always create all generated document content in English, while continuing to speak to the user in the language of their choice.

Platform hint: Instructions and templates assume a Linux host with GNU coreutils. Adapt to the detected user OS.

  • macOS — Substitute BSD equivalents for GNU-only utilities.
  • Windows — Still use .sh files (skip irrelevant chmod +x), assuming Git Bash is available at runtime. Highlight this requirement in the Debriefing. Set "shell": "bash" on command hooks in settings.json. Omit the entire sandbox block from settings.json as long as bash sandboxing is unsupported.

Agent Content Principles

When generating content for .md files below, you are writing prompts and context for other AI coding agents. Follow these principles to optimally tailor your instructions to their needs:

  • Concise — Minimize token usage. Prefer keywords and terse bullet points over prose.
  • Structured — Use compact Markdown to delineate connected aspects.
  • Actionable — Generate concrete operational directives, not abstract guidelines. Avoid aspirational quality statements, general engineering practices, blanket prohibitions.
  • Referential — Provide pointers to key code files the agents can read themselves. Do not describe how code works in agent instructions as such duplication leads to drift.
  • Scoped — Context is hierarchical. The CLAUDE.md must only contain core project identity and semantics. Rules and agent instructions progressively disclose domain- and task-specific knowledge.
  • Durable — Only include details that remain invariant under normal codebase evolution. Avoid specific technology versions. Reference namespaces or search terms instead of single artifacts.

Read the full file on GitHub · 189 lines

Files

What ships with it

8 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. 2d ago First seen · 189 lines · 28 tokens per session scan B e94d71e0db4d

Subscribe to this mod's changes

standalone is a skill published in the GitHub repository ralfstrobel/agentic-brownfield-coding (28 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 28 tokens to every session and 2,591 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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