preflight

A diagnostic command for checking whether a Cortex installation is ready, including its Python setup, database connection, extensions, and files. Cortex is the software environment being checked.

In plain words
What is it for?
Use it after cloning or installing Cortex to find setup problems, apply the repairs suggested by its diagnostic tool, and verify the installation again.
Why use it?
It turns installation failures into a list of specific checks and repair commands, ordered by dependency.

Command

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 commands/cdeust/cortex/preflight
Clone the repo
git clone --depth 1 https://github.com/cdeust/Cortex
Per session 20 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 400 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 $0.00020 $0.00400
Opus 5 $0.00010 $0.00200
Sonnet 5 $0.00004 $0.00080
Haiku 4.5 $0.00002 $0.00040

Measured yesterday against content hash 22f9d48151e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

preflight 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 yesterday.

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.

commands/preflight.md · 34 lines

What it actually says

Préflight Cortex $ARGUMENTS

Tu diagnostiques l'installation de Cortex pour un utilisateur qui vient de cloner le repo ou d'installer le plugin — il n'est ni expert PostgreSQL ni expert Python. S'il a passé un argument ($ARGUMENTS), c'est le symptôme qu'il observe : commence par le relier au check concerné.

Exécute python -m mcp_server.doctor (essaie python3 si python échoue) et interprète la sortie :

  • Pour CHAQUE check en échec : cite le nom exact du check, explique en une phrase ce qu'il vérifie, puis donne LA commande de réparation que le doctor propose — telle quelle, prête à copier.
  • Ordonne les réparations par dépendance (Python → driver → DATABASE_URL → connexion → extensions → filesystem), pas dans l'ordre d'affichage.
  • Si tous les checks passent : dis-le en une ligne et indique le premier usage (query_methodology au prochain démarrage de session).

Format de sortie :

  1. Verdict : PRÊT / X réparations nécessaires
  2. Réparations dans l'ordre (numérotées, une commande par étape)
  3. Vérification finale : la commande à relancer pour confirmer

Ne modifie AUCUN fichier. Ne devine jamais une commande de réparation qui n'est pas dans la sortie du doctor : si le doctor ne propose rien, dis « le doctor ne propose pas de fix automatique pour ce check » et cite la section concernée de PRIVACY.md ou README.md.

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. yesterday First seen · 34 lines · 20 tokens per session scan A 22f9d48151e2

Subscribe to this mod's changes

preflight is a command published in the GitHub repository cdeust/Cortex (71 stars, last pushed 3d ago), licensed MIT. It adds 20 tokens to every session and 400 once invoked, about $0.0001 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.