axis: Instructions file for Codex

AGENTS.md

axis AGENTS.md is an instructions file for Codex, OpenCode from netlify/axis. It costs 9,543 tokens per session, scanned F, original, MIT.

Repository instructions for AXIS, a TypeScript command-line testing framework for AI agents. It runs agents through scenarios and grades results such as goal completion and service quality.

In plain words
What is it for?
Use them when developing AXIS runners, scenario tests, scoring, command-line output, logging, or adapters.
Why use it?
They define the project’s terminology and architecture so changes use the correct names and preserve the separation between test execution and terminal display.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions subagents; positional $N argument.

This is netlify/axis's own configuration. It tells Codex and OpenCode how to work on axis itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything axis configures →

Reuse

Borrowing it

Nothing to install: this file belongs to netlify/axis. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/netlify/axis/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/netlify/axis

Made for: Codex, OpenCode.

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.

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Per session 9,543 This file is loaded in full into every session.
When invoked 9,543 The same file — it is already loaded in full.
Security scan F 4 findings. 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 $0.09543 $0.09543
Opus 5.5 $0.03817 $0.03817
Sonnet 5.5 $0.01909 $0.01909
Haiku 4.5 $0.00954 $0.00954

Measured 27d ago against content hash 51556c5fb25b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade F, and why

axis AGENTS.md scanned grade F with 4 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 27d 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.

- **No npm package**, so the `npx` fallback cannot install it: `muse` must already be on `PATH` (`curl https://dev.meta.ai/install.sh | bash`)

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

`claude-code` and `codex` declare `requiredEnv` (`ANTHROPIC_API_KEY`, `CODEX_API_KEY`) AND implement `hasLocalSession`. Pre-flight in `runner.ts` checks env vars first; if missing, it calls `hasLocalSession` and only thr

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf dist && npm run build # Always clean build -stale dist/ causes subtle issues

Makes network callslowCapability

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

- **No npm package**, so the `npx` fallback cannot install it: `muse` must already be on `PATH` (`curl https://dev.meta.ai/install.sh | bash`)
AGENTS.md · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Project Overview

AXIS (Agent Experience Index Score) is a synthetic testing framework for AI agents. It runs agents against scenarios, captures transcripts, and produces graded scores across four dimensions: goal achievement, environment quality, service quality, and agent quality.

  • ESM TypeScript, built with tsc, tested with vitest, CLI via commander
  • Live terminal display uses ink (React for CLIs), rendered to stderr
  • Runner is fully decoupled from display via a Logger interface

Terminology

  • AXIS Result (not "AXIS Score") -the composite 0–100 number. "AXIS Score" reads as "score score" since AXIS already stands for "Agent Experience Index Score".
  • Use "AXIS Result" in all user-facing text, display output, and documentation.
  • The internal property names (axisScore, averageAxisScore) are fine as code identifiers.

Architecture

Layer Key Files Purpose
CLI src/cli.ts Entry point, ink display, signal handling
Runner src/runner/runner.ts, lifecycle.ts, repo-cache.ts Job orchestration, concurrency, isolation; runLifecyclePhase captures $AXIS_OUTPUT markdown for setup/teardown/beforeAll/afterAll phases; repo-cache.ts clones git URLs used by copy actions into .axis/repos/<host>/<owner>/<repo>/<ref>, once per (repo, ref) per process
Adapters src/adapters/*.ts Spawn agent CLIs, parse NDJSON streams
Scoring src/scoring/ LLM judge + interaction-based evaluation pipeline; aggregate.ts collapses a pair's repeated runs into a representative run + spread + reliability
Reports src/reports/writer.ts, reader.ts, paths.ts Persistent .axis/reports/ store; paths.ts is the single source of truth for per-run file layout
Config src/config/loader.ts, remote-scenarios.ts Parses axis.config.*; walks the scenarios tree (see discovery buckets under Gotchas); mergeRemoteConfig clones any git-URL entries in scenarios into .axis/remotes/, inlines their paths, AND folds each remote repo's env/mcp_servers/skills/artifacts/adapters into the parent (parent wins on collisions)
Display src/ui/format.ts, LiveStatus.tsx, AnimatedTokens.tsx Pure formatting + ink components (incl. live token counter)
Types src/types/ Shared interfaces (agent, config, output, scoring, report)

Read the full file on GitHub · 224 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. 27d ago Changed · +27 lines · +2,370 tokens per session scan D → F 51556c5fb25b
  2. 28d ago Changed · +29 lines · +2,519 tokens per session ab7ecbdc9fc5
  3. 1mo ago Changed · +17 lines · +1,124 tokens per session 6038898830f4
  4. 1mo ago Changed · +2 lines · +195 tokens per session 75a38ca51b16
  5. 2mo ago First seen · 149 lines · 3,335 tokens per session scan D 20abf2d32f7d

Subscribe to this mod's changes

axis AGENTS.md is an instructions file published in the GitHub repository netlify/axis (66 stars, last pushed today), licensed MIT. It adds 9,543 tokens to every session, about $0.0382 per session on Opus 5.5. A static security scan graded it F with 4 findings (downloads and executes remote code, reads agent configuration directories, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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