runtime-environment

runtime-environment is a skill for Claude Code, Codex from PranavBakre/Junior. It costs 23 tokens per session (1,662 once invoked), scanned A, original, no licence file.

A set of facts and rules about the Junior runtime environment, tool boundaries, and worktree setup. A worktree is a separate working copy of a Git repository.

In plain words
What is it for?
Use it when starting active delivery work, especially when checking runtime assumptions or creating and managing worktrees for bug fixes.
Why use it?
It helps delivery work use the correct environment details and stay within the available tool boundaries. It also standardizes how bug fixes are isolated from other changes.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

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/pranavbakre/junior/runtime-environment
Any agent
npx skills add PranavBakre/Junior --skill runtime-environment
Clone the repo
git clone --depth 1 https://github.com/PranavBakre/Junior

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 runtime-environment

README.md
[![agentmods](https://agentmods.dev/badge/skills/pranavbakre/junior/runtime-environment.svg)](https://agentmods.dev/skills/pranavbakre/junior/runtime-environment)
Your own site
<a href="https://agentmods.dev/skills/pranavbakre/junior/runtime-environment"><img src="https://agentmods.dev/badge/skills/pranavbakre/junior/runtime-environment.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,662 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00023 $0.01662
Opus 5 $0.00012 $0.00831
Sonnet 5 $0.00005 $0.00332
Haiku 4.5 $0.00002 $0.00166

Measured yesterday against content hash b3d16ed0cd4c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

runtime-environment scanned grade A 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 yesterday.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Concrete services, ports, and start commands are in the org-specific section appended below. Use a fixed-port pattern — do NOT `lsof`/`ps`/`curl`-loop to discover ports.
support/skills/runtime-environment/SKILL.md · 88 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday First seen · 88 lines · 23 tokens per session scan A b3d16ed0cd4c

Subscribe to this mod's changes

runtime-environment is a skill published in the GitHub repository PranavBakre/Junior (13 stars, last pushed 12d ago), with no licence file. It adds 23 tokens to every session and 1,662 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

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