Goal: add documentation to readme reflecting Claude and Codex's use of /goal

## Goal

Our readme should contain references to the use of `/goal` in Claude Code and Codex, with appropriate links. Not extended discussion, but we want to note that we are using this now-standard term.

We also want to make sure we link to https://github.com/githubnext/autoloop which also inspired this repo. Autoloop is a similar goal-driven agentic workflow, with more of an emphasis on scientific exploration.

## Completion Contract

The README.md "Built On" section (or a similar appropriate section) links to:
- Claude Code `/goal` documentation
- Codex `/goal` documentation
- https://github.com/githubnext/autoloop with a brief description

## Evidence / Verification

```bash
set -euo pipefail
grep -q "autoloop" README.md
grep -qi "claude" README.md
grep -qi "codex" README.md
grep -q "https://github.com/githubnext/autoloop" README.md
```

All commands must exit 0.

## Scope and Constraints

Allowed files:
- `README.md`

Do not remove existing content. Keep additions brief — a few lines, not paragraphs.

## Iteration Policy

This is a single-run goal. Read the current README, add the references, and verify.

## Blocked Stop Condition

If the official `/goal` documentation URLs for Claude Code or Codex cannot be found or confirmed, add placeholder references noting the feature and stop with a comment listing which URLs need human confirmation.

Commencez par lire README.md et repérez la section "Built On" ou un autre emplacement approprié pour de brèves références. Confirmez les URL officielles de la documentation de Claude Code et de Codex /goal, ajoutez les deux liens ainsi qu'une brève description et un lien pour githubnext/autoloop, puis exécutez les quatre commandes grep indiquées dans l'issue pour vérifier que tout est terminé.

Rédigé par le modèle d'indexation à partir du texte de l'issue.