agentic-environment-bootstrap

agentic-environment-bootstrap is a skill for Claude Code, Codex from JuanColilla/Agentic-Agnostic-Workflow-Environment. It costs 177 tokens per session (5,257 once invoked), scanned B, original, Apache-2.0.

A setup guide for configuring one project or computer to work consistently with multiple AI coding assistants through AGENTS.md, a shared instruction file.

In plain words
What is it for?
Use it to initialize projects, create shared agent instructions, and generate small adapter files for tools such as Claude Code, Codex, Cursor, or Gemini CLI.
Why use it?
It avoids keeping different copies of the same project rules for each coding tool and helps account for assistants with different context limits.

Skill for Claude CodeCodex

Written for Claude Code and Codex: SessionStart hook event, but also reads ~/.codex or $CODEX_HOME. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

Good fit Use it to initialize projects, create shared agent instructions, and generate small adapter files for tools such as Claude Code, Codex, Cursor, or Gemini CLI.

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Install with agentmods
npx agentmods add skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap
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.

Any agent
npx skills add JuanColilla/Agentic-Agnostic-Workflow-Environment --skill agentic-environment-bootstrap
Clone the repo
git clone --depth 1 https://github.com/JuanColilla/Agentic-Agnostic-Workflow-Environment

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 agentic-environment-bootstrap

README.md
[![agentmods](https://agentmods.dev/badge/skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap/github.svg)](https://agentmods.dev/skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap)
Your own site
<a href="https://agentmods.dev/skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap"><img src="https://agentmods.dev/badge/skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for agentic-environment-bootstrap

Your own site · 80×15
<a href="https://agentmods.dev/skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap"><img src="https://agentmods.dev/badge/skills/juancolilla/agentic-agnostic-workflow-environment/agentic-environment-bootstrap.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 177 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,257 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00177 $0.05257
Opus 5 $0.00088 $0.02629
Sonnet 5 $0.00035 $0.01051
Haiku 4.5 $0.00018 $0.00526

Measured 8d ago against content hash 3bc63db6e54a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade B, and why

agentic-environment-bootstrap 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 8d ago.

The scan reads SKILL.md. This mod also ships 9 executable files (assets/tier-dispatch-hook.sh, scripts/bootstrap-user-env.sh, scripts/compile-adapters.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.

in `~/.claude/settings.json`, set `AGENTS_TIER=core|extended` in each
skills/agentic-environment-bootstrap/SKILL.md · 227 lines

How it starts

The opening of the file, as written. The whole thing — 227 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agentic Environment Bootstrap

Scaffold a project (or a fresh user account) so it works coherently with any AI coding agent through a single open-standard surface: AGENTS.md. Tool-specific files (CLAUDE.md, GEMINI.md, etc.) are reduced to thin adapters that delegate back to AGENTS.md.

Why this exists

The market has converged on AGENTS.md (Linux Foundation, Dec 2025) as the canonical contract for AI coding agents. Codex, Cursor, Windsurf, Gemini CLI, Antigravity, OpenCode, Aider, Zed, Warp and most of the ecosystem read it natively. Only Claude Code still requires a CLAUDE.md adapter (anthropics/claude-code#6235, open since Aug 2025). This skill captures that reality: write the truth once in AGENTS.md, generate adapters for every tool the user has installed, never duplicate content.

Two further realities this skill encodes. Context tiers: one harness now serves both small-window local models (MLX-class, where every line of instructions costs prefill) and large-window providers — so directives split into a minimal core every model gets and extended tiers only high-capacity runtimes load (why: a rule that helps a 200k model actively hurts a 32k one; see references/context-tiers.md). Advanced agents: roles accumulate knowledge, corrections and preferences that outlive any single project or tool — so they are defined once as canonical bundles (role + knowledge + memory + skill-box) and compiled per tool (why: role continuity without vendor lock-in; see references/advanced-agents.md).

This skill (with its sibling doctor) is the complete, self-contained deployment vehicle for the whole system — global level and project level, greenfield (R1/Workflows A-D) and migration (R2). If deploying or converting requires knowledge that is not in this skill's references, that is a bug in the skill: fix the skill, don't improvise.

The full architectural rationale lives in references/architecture.md. Read it whenever the user pushes back on a decision — there is a sourced reason for every rule here.

Read the full file on GitHub · 227 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. 8d ago First seen · 227 lines · 177 tokens per session scan B 3bc63db6e54a

Subscribe to this mod's changes

agentic-environment-bootstrap is a skill published in the GitHub repository JuanColilla/Agentic-Agnostic-Workflow-Environment (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 177 tokens to every session and 5,257 once invoked, about $0.0009 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 2026-08-31.

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