agentmods.dev

ctx-init

ctx-init is a skill for Claude Code, Codex from OXI-717/ai-native-toolkit. It costs 55 tokens per session (815 once invoked), scanned A, original, MIT.

A project setup tool that creates AGENTS.md, CLAUDE.md, and a rules folder in a code repository. These files tell coding agents about the project and its working rules.

In plain words
What is it for?
Use it when starting a repository or adding shared instructions for tools such as Claude Code, Codex, Gemini, and Cursor.
Why use it?
It avoids having to create and organize the same project instructions by hand, while keeping them available to several coding agents.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the ctx plugin — 2 skills shipped together

not rated 7 12d ago A scan 55 tokens original MIT
View the source file OXI-717/ai-native-toolkit
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/oxi-717/ai-native-toolkit/ctx-init
Any agent
npx skills add OXI-717/ai-native-toolkit --skill ctx-init
Clone the repo
git clone --depth 1 https://github.com/OXI-717/ai-native-toolkit

Made for: Claude Code, Codex.

Or install ctx, the plugin that ships this one along with the rest of its 2 skills.

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 ctx-init

README.md
[![agentmods](https://agentmods.dev/badge/skills/oxi-717/ai-native-toolkit/ctx-init.svg)](https://agentmods.dev/skills/oxi-717/ai-native-toolkit/ctx-init)
Your own site
<a href="https://agentmods.dev/skills/oxi-717/ai-native-toolkit/ctx-init"><img src="https://agentmods.dev/badge/skills/oxi-717/ai-native-toolkit/ctx-init.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 815 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 $0.00055 $0.00815
Opus 5 $0.00028 $0.00407
Sonnet 5 $0.00011 $0.00163
Haiku 4.5 $0.00006 $0.00081

Measured 5d ago against content hash 4944400f7511, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ctx-init 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 5d 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.

plugins/ctx/skills/ctx-init/SKILL.md · 49 lines

How it starts

The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ctx-init — context initialization in a repo

Creates the ctx structure in the current repo:

  • AGENTS.md from template with frontmatter (all @-imports are relative @./rules/...)
  • CLAUDE.md with @AGENTS.md import
  • rules/ with copies of shared plugin rules (language, dates, git, no-secrets, no-public-names) plus project-specific stubs (stack, testing, boundaries, focus)

Both shared rules and templates exist in two language variants: en/ (English) and ru/ (Russian). The user picks one at init time. Shared rules are copied rather than imported via ${CLAUDE_PLUGIN_ROOT} because Claude Code does not expand env variables in project-level @-imports (and this is needed for cross-agent compatibility: Codex/Gemini/Cursor all read the same AGENTS.md).

Input (ask the user before running)

  1. project — short name (e.g. MYAPP, API, DOCS).
  2. description — one line describing the project topic.
  3. language — en or ru (default en). Determines the language of AGENTS.md headers, the 5 shared rule files (language, dates, git, no-secrets, no-public-names), and the 4 project stubs (stack, testing, boundaries, focus).

Procedure

Pre-flight checks:

  1. pwd must be the root of the repo being initialized.
  2. If AGENTS.md already exists — stop and tell the user that migration is not supported. Ask the user to rename the old file manually (mv AGENTS.md AGENTS.md.legacy) and call ctx-init again.

Actions (replace <LANG> with the chosen en or ru):

  1. Copy ${CLAUDE_PLUGIN_ROOT}/templates/<LANG>/AGENTS.md.template to ./AGENTS.md.
  2. Substitute {{PROJECT}}, {{DESCRIPTION}} via sed.
  3. Copy ${CLAUDE_PLUGIN_ROOT}/templates/<LANG>/CLAUDE.md.template to ./CLAUDE.md.
  4. Create ./rules/.
  5. Copy shared rules: ${CLAUDE_PLUGIN_ROOT}/rules/<LANG>/*.md to ./rules/.
  6. Copy project stubs: ${CLAUDE_PLUGIN_ROOT}/templates/<LANG>/stubs-repo-rules/*.md to ./rules/ (without overwriting shared files).
  7. Run python3 ${CLAUDE_PLUGIN_ROOT}/lib/ctx-lint.py <repo> — verify all @-imports resolve (0 errors).
  8. Show the user what was created, and ask them to fill in the rules/stack.md, rules/testing.md, rules/boundaries.md, rules/focus.md files.
  9. Do not commit automatically — user reviews and commits themselves.

Read the full file on GitHub · 49 lines

Files

What ships with it

1 file 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. 5d ago First seen · 49 lines · 55 tokens per session scan A 4944400f7511

Subscribe to this mod's changes

ctx-init is a skill published in the GitHub repository OXI-717/ai-native-toolkit (7 stars, last pushed 12d ago), licensed MIT. It adds 55 tokens to every session and 815 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 2026-08-31.

Code reviewagent-skillsai-agentsclaude-codecodexdeveloper-tools
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