prime

A codebase-orientation guide that examines a project's technology, structure, important files, workflow, and optionally one feature.

In plain words
What is it for?
Use it when joining a codebase, planning work, or asking for a deeper explanation of a specific feature.
Why use it?
It gives developers a starting map of an unfamiliar project before they make changes or investigate details.

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/flexonze/claude-init/prime
Any agent
npx skills add Flexonze/claude-init --skill prime
Clone the repo
git clone --depth 1 https://github.com/Flexonze/claude-init

Made for: Claude Code, Codex.

Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 183 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 $0.00024 $0.00183
Opus 5 $0.00012 $0.00092
Sonnet 5 $0.00005 $0.00037
Haiku 4.5 $0.00002 $0.00018

Measured 3d ago against content hash 4f0a473e98ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prime 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.

.claude/skills/prime/SKILL.md · 34 lines

What it actually says

Prime - Codebase Understanding

Get a comprehensive understanding of the codebase and optionally dive deep into a specific feature.

Instructions

1. Explore the Codebase

Investigate and understand the codebase:

  • Technology stack and architecture
  • Project structure and key directories
  • Important files and entry points
  • Development workflow

2. Feature Analysis (Optional)

If $1 is provided, also investigate that specific feature:

  • Find where the feature is implemented
  • Understand how it works
  • Identify related files and dependencies
  • Note any relevant tests or configuration

3. Share Your Findings

Present what you learned about the codebase and feature in a clear, helpful way.

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 · 34 lines · 24 tokens per session scan A 4f0a473e98ef

Subscribe to this mod's changes

prime is a skill published in the GitHub repository Flexonze/claude-init (10 stars, last pushed 5mo ago), licensed MIT. It adds 24 tokens to every session and 183 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.

Related

Other skills, from other repositories

etsy-category-listing

Etsy category page scraper: given an Etsy category URL (e.g. https://www.etsy.com/c/jewelry) and optional page number, returns paginated product listings with listingId, shopId, title, url, image, salePrice, originalPrice, currency, rating, reviewCount, shopName, isAd, freeShipping, badge from category and subcategory…

browser-act/skills · 209 tokens

agent-memory

../../../engineering/agent-memory/skills/agent-memory/SKILL.md.

alirezarezvani/claude-skills · 0 tokens

agile-product-owner

../../../product-team/agile-product-owner/skills/agile-product-owner/SKILL.md.

alirezarezvani/claude-skills · 0 tokens

amazon-reviews-api-skill

This skill helps users automatically extract Amazon product reviews via the Amazon Reviews API. Agent should proactively apply this skill when users express needs like getting reviews for Amazon product with ASIN B07TS6R1SF, analyzing customer feedback for a specific Amazon item, getting ratings and comments for a…

browser-act/skills · 124 tokens

amazon-competitor-analyzer

Scrapes Amazon product data from ASINs using browseract.com automation API and performs surgical competitive analysis. Compares specifications, pricing, review quality, and visual strategies to identify competitor moats and vulnerabilities.

browser-act/skills · 48 tokens

audit-reproducibility

Enforce the replication-protocol.md rule by cross-checking numeric claims in a manuscript against the actual R / Stata / Python outputs. Report PASS/FAIL per claim against tolerance thresholds. Use before submission and before releasing a replication package.

pedrohcgs/claude-code-my-workflow · 54 tokens