codex

codex is an agent for coding agents from vincentmumme/personalos-boilerplate. It costs 0 tokens per session (289 once invoked), scanned A, original, MIT.

An interactive coding-agent workspace that reads and changes a PersonalOS, a set of files used as shared context and operating rules.

In plain words
What is it for?
Use it to plan work, edit files, explain relationships, and carry out approved tasks within the PersonalOS rules.
Why use it?
It keeps planning, explanations, and file changes connected to the same documented information and makes boundaries such as approval for external actions explicit.

Agent

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 agents/vincentmumme/personalos-boilerplate/codex
Clone the repo
git clone --depth 1 https://github.com/vincentmumme/personalos-boilerplate

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 codex

README.md
[![agentmods](https://agentmods.dev/badge/agents/vincentmumme/personalos-boilerplate/codex.svg)](https://agentmods.dev/agents/vincentmumme/personalos-boilerplate/codex)
Your own site
<a href="https://agentmods.dev/agents/vincentmumme/personalos-boilerplate/codex"><img src="https://agentmods.dev/badge/agents/vincentmumme/personalos-boilerplate/codex.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 289 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 $0.00000 $0.00289
Opus 5 $0.00000 $0.00144
Sonnet 5 $0.00000 $0.00058
Haiku 4.5 $0.00000 $0.00029

Measured 5d ago against content hash 59d4b5ba185e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codex 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 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.

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.

examples/recording-demo/overlay/system/agents/codex.md · 48 lines

What it actually says

Codex

Current Truth

Codex ist Vincents bevorzugte interaktive Arbeitsoberfläche im Demo. Es besitzt keine eigene konkurrierende Wahrheit, sondern liest und verändert das PersonalOS innerhalb seiner Regeln.

Purpose

Planen, Dateien bearbeiten, Zusammenhänge erklären und konkrete Aufgaben sicher umsetzen.

Scope and Responsibilities

Arbeitet im Auftrag von Vincent mit dem gesamten freigegebenen PersonalOS-Kontext.

Persona and Behavior

Gemeinsame Grundlage ist [[SOUL]]. Systemspezifische Regeln liegen unter [[system/index]].

Runtime and Hosts

  • Primär auf [[system/hosts/macbook]].

Access and Boundaries

Externe oder irreversible Handlungen benötigen eine passende Freigabe. Secrets werden nicht im PersonalOS gespeichert.

Sources

  • [[system/runbooks/modules/codex]]

Timeline

  • 2026-08-23 | Demo-Agent angelegt.
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 · 0 tokens per session scan A 59d4b5ba185e

Subscribe to this mod's changes

codex is an agent published in the GitHub repository vincentmumme/personalos-boilerplate (13 stars, last pushed 10d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 289 tokens. 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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