m3-install

m3-install is a skill for Claude Code, Codex from skynetcmd/m3-memory. It costs 16 tokens per session (365 once invoked), scanned C, original, Apache-2.0.

An installation and upgrade routine for m3-memory, the local system that provides the agent’s memory store and command-line tools. It checks whether the software is installed, then gives the appropriate install or update instructions.

In plain words
What is it for?
Use it to install or upgrade the m3-memory command-line program, its system files, background services, and database schema, then verify the result.
Why use it?
It removes the need to work out which command and installation method applies to your operating system and current setup.

Skill for Claude CodeCodex

Part of the m3 plugin — 16 skills, 15 commands, 2 agents, 3 hooks, 1 MCP server shipped together

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/skynetcmd/m3-memory/m3-install
Any agent
npx skills add skynetcmd/m3-memory --skill m3-install
Clone the repo
git clone --depth 1 https://github.com/skynetcmd/m3-memory

Made for: Claude Code, Codex.

Or install m3, the plugin that ships this one along with the rest of its 16 skills, 15 commands, 2 agents, 3 hooks, 1 MCP server.

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 m3-install

README.md
[![agentmods](https://agentmods.dev/badge/skills/skynetcmd/m3-memory/m3-install.svg)](https://agentmods.dev/skills/skynetcmd/m3-memory/m3-install)
Your own site
<a href="https://agentmods.dev/skills/skynetcmd/m3-memory/m3-install"><img src="https://agentmods.dev/badge/skills/skynetcmd/m3-memory/m3-install.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 365 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 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 $0.00016 $0.00365
Opus 5 $0.00008 $0.00182
Sonnet 5 $0.00003 $0.00073
Haiku 4.5 $0.00002 $0.00036

Measured 5d ago against content hash 741e03ab2c5f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

m3-install scanned grade C with 2 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://raw.githubusercontent.com/skynetcmd/m3-memory/main/install.sh | bash

Makes network callslowCapability

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

curl -fsSL https://raw.githubusercontent.com/skynetcmd/m3-memory/main/install.sh | bash
.antigravity-plugin/skills/m3-install/SKILL.md · 48 lines

What it actually says

M3 Install

When to Use

Use this skill when the user wants to install or upgrade the m3-memory system, CLI executables, embedder service, or database schema.

Instructions

Step 1 — detect current state. Try in order:

mcp-memory --version                       # plain CLI
python -m m3_memory.cli --version           # module form (Windows --user)

Step 2 — branch on what step 1 printed.

Not installed (both commands fail):

  • On Linux / macOS, suggest:
    curl -fsSL https://raw.githubusercontent.com/skynetcmd/m3-memory/main/install.sh | bash
    
  • On Windows, suggest:
    pip install --user m3-memory
    # then add %APPDATA%\Python\Python<NN>\Scripts to user PATH if needed
    
    Link them to https://github.com/skynetcmd/m3-memory/blob/main/docs/install_windows.md for full instructions.

After install completes, tell the user to re-run /m3:health in a NEW session (PATH changes don't apply to the current one).

Already installed (a version printed):

  • On Linux / macOS, run:
    pipx upgrade m3-memory
    mcp-memory update
    
  • On Windows, run:
    pip install --user --upgrade m3-memory
    python -m m3_memory.cli update
    
  • Then /m3:health to verify.

Step 3 — print one-line summary of what action was taken or recommended.

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 · 48 lines · 16 tokens per session scan C 741e03ab2c5f

Subscribe to this mod's changes

m3-install is a skill published in the GitHub repository skynetcmd/m3-memory (23 stars, last pushed 5d ago), licensed Apache-2.0. It adds 16 tokens to every session and 365 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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