using-axis

An operator's guide for AXIS, a framework that runs synthetic tests with AI agents and reports an Agent Experience Index Score.

In plain words
What is it for?
Use it to initialize AXIS, run scenarios with selected agents, compare runs, manage baselines, and interpret scores.
Why use it?
It explains how to run tests, compare results, investigate regressions, and understand where AXIS stores its reports.

Skill for Claude CodeCodex

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/netlify/axis/using-axis
Any agent
npx skills add netlify/axis --skill using-axis
Clone the repo
git clone --depth 1 https://github.com/netlify/axis

Made for: Claude Code, Codex.

Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,958 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 $0.00058 $0.02958
Opus 5 $0.00029 $0.01479
Sonnet 5 $0.00012 $0.00592
Haiku 4.5 $0.00006 $0.00296

Measured 2d ago against content hash 993b47dce96a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

using-axis 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 2d 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.

skills/using-axis/SKILL.md · 225 lines

How it starts

The opening of the file, as written. The whole thing — 225 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Using AXIS

AXIS (Agent Experience Index Score) is a synthetic testing framework for AI agents. This skill is the operator's guide: how to invoke the CLI, where AXIS writes files, and how to read the scoring output.

For authoring scenarios and axis.config.json, see the configure-axis skill.

When to use this skill

Trigger phrases include "run AXIS", "compare runs", "explain this score", "which scenario regressed", "set a baseline", "where does AXIS put its reports", "what does this dimension mean".

Refer to the framework's output as the AXIS Result. The acronym is Agent Experience Index Score.

CLI commands

The binary is axis (or npx @netlify/axis without a global install).

axis init

Scaffold axis.config.json and a sample scenario, then install AXIS skills via npx skills.

Flag Purpose
-s, --scenarios <path> Scenarios directory (default ./scenarios)
-a, --agent <names> Comma-separated agents (e.g. claude-code,codex)
--format <format> json (default), js, or ts
-f, --force Overwrite existing files
--no-skills Skip the automatic skills install

axis run

Execute every scenario against every configured agent in isolated workspaces, score the results, and write a report.

Flag Purpose
-c, --config <path> Config path (default discovers axis.config.{json,js,ts,mjs})
-s, --scenario <keys> Comma-separated keys with glob support (cms/*, hello-*)
-a, --agent <names> Comma-separated agent names with glob support (claude-code|*)
--concurrency <n> Max parallel jobs (default 15)
--failed [reportId] Re-run only failed pairs from a prior report (default latest)
--no-score Skip the LLM judges, write raw results only
--compare-baseline [name] Diff results against a saved baseline (default main)
--refresh-skills Force re-clone of remote skills cached under .axis/skills-cache/
--json Emit JSON to stdout instead of the live TTY display
-v, --verbose Per-step logging
--debug Capture raw agent stdout into {agent}.debug.ndjson
-o, --output-dir <dir> Also write the report manifest to this directory

Read the full file on GitHub · 225 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. 2d ago First seen · 225 lines · 58 tokens per session scan A 993b47dce96a

Subscribe to this mod's changes

using-axis is a skill published in the GitHub repository netlify/axis (55 stars, last pushed 11d ago), licensed MIT. It adds 58 tokens to every session and 2,958 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 2026-08-30.

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