What is working-with-mise?

Guidance for mise, a tool that installs and switches between versions of developer tools for each project. It covers tools such as Node.js, Python, Ruby, Go, Rust, Terraform, and Kubernetes.

It helps add project-specific tool versions, choose between mise and system package managers, and fix shell activation or PATH problems.

It avoids version conflicts and helps diagnose cases where an installed command cannot be found. It also prevents creating duplicate configuration files or relying on temporary workarounds.

working-with-mise — Skill for Claude Code by technicalpickles

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 technicalpickles/pickled-claude-plugins --skill working-with-mise

Clone the repo

git clone --depth 1 https://github.com/technicalpickles/pickled-claude-plugins

Made for: Claude Code.

Or install dev-tools, the plugin that ships this one along with the rest of its 8 skills, 2 commands.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/technicalpickles/pickled-claude-plugins/working-with-mise/github.svg)](https://agentmods.dev/skills/technicalpickles/pickled-claude-plugins/working-with-mise)

Your own site

<a href="https://agentmods.dev/skills/technicalpickles/pickled-claude-plugins/working-with-mise"><img src="https://agentmods.dev/badge/skills/technicalpickles/pickled-claude-plugins/working-with-mise/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/technicalpickles/pickled-claude-plugins/working-with-mise"><img src="https://agentmods.dev/badge/skills/technicalpickles/pickled-claude-plugins/working-with-mise.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,275 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Rogue Agent · line 18
Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00037	$0.02275
Opus 5.5	$0.00015	$0.00910
Sonnet 5.5	$0.00007	$0.00455
Haiku 4.5	$0.00004	$0.00228

Measured today against content hash bc56f743e385, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

working-with-mise 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 today.

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/dev-tools/skills/working-with-mise/SKILL.md · 279 lines

How it starts

The opening of the file, as written. The whole thing — 279 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Working with mise

Overview

mise is a polyglot tool version manager. Use this skill when:

Adding tools to a project via mise
Troubleshooting "command not found" when mise should have tools available
Deciding whether mise is the right choice for a dependency

The Iron Rules

Use mise use to add tools - never manually edit config files
Detect existing config files first - don't create new ones when one exists
Fix the shell, don't workaround - if tools aren't on PATH, diagnose the activation issue rather than using mise exec as a permanent workaround

When to Use mise vs Alternatives

Use mise when version matters per-project

Tools where different projects need different versions:

Language runtimes: node, python, ruby, go, rust
Infrastructure tools: terraform, kubectl, helm
Tools with breaking changes between versions

# Good mise candidates - version sensitivity
mise use node@20      # Projects may need different Node versions
mise use [email protected]  # IaC often pins specific versions
mise use [email protected]     # Gemfiles often require specific Ruby

Use Homebrew/system when version rarely matters

Stable CLIs with consistent interfaces across versions:

jq, yq - query languages are stable
gh, hub - GitHub CLI
ripgrep, fd - search tools
tree, htop - system utilities

# Better as Homebrew - version doesn't matter
brew install jq gh ripgrep

Decision checklist

Ask yourself:

Does this project's README/docs specify a version? → mise
Could different team members need different versions? → mise
Does the tool have breaking changes between versions? → mise
Is it a stable CLI you use the same way everywhere? → Homebrew

Adding Tools with mise

1. Check for existing config files first

Before adding tools, detect what config format the project uses:

# Check for existing mise config
ls -la mise.toml .mise.toml mise.local.toml .mise.local.toml .tool-versions 2>/dev/null

Read the full file on GitHub · 279 lines

Files

What ships with it

60 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.

today Changed · +37 lines bc56f743e385
1mo ago First seen · 242 lines · 37 tokens per session scan A 7c24e17cb8ac

Subscribe to this mod's changes

working-with-mise is a skill published in the GitHub repository technicalpickles/pickled-claude-plugins (12 stars, last pushed today), licensed MIT. It adds 37 tokens to every session and 2,275 once invoked, about $0.0001 per session on Opus 5.5. 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.

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