What is devoxx-2026 AGENTS.md?

Cross-project instructions for a Flutter frontend and Rust backend, using Clean Architecture and Hexagonal Architecture to keep business rules separate from interfaces and infrastructure.

Use them when adding frontend features, backend use cases, domain models, data adapters, REST handlers, or persistence code.

They prevent dependencies from crossing the wrong architectural boundaries and keep business logic out of UI widgets and HTTP handlers.

devoxx-2026 AGENTS.md — Instructions file for Codex and OpenCode by b-fontaine: Cross-project instructions for a Flutter frontend and Rust b

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 instructions/b-fontaine/devoxx-2026/agents-md

Clone the repo

git clone --depth 1 https://github.com/b-fontaine/devoxx-2026

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/b-fontaine/devoxx-2026/agents-md.svg)](https://agentmods.dev/instructions/b-fontaine/devoxx-2026/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/b-fontaine/devoxx-2026/agents-md"><img src="https://agentmods.dev/badge/instructions/b-fontaine/devoxx-2026/agents-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 2,142 This file is loaded in full into every session.

When invoked 2,142 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5	$0.02142	$0.02142
Opus 5	$0.01071	$0.01071
Sonnet 5	$0.00428	$0.00428
Haiku 4.5	$0.00214	$0.00214

Measured 5d ago against content hash 5b0994cc7261, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

devoxx-2026 AGENTS.md 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.

AGENTS.md · 211 lines

How it starts

The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Instructions cross-agents

Projet

Frontend Flutter (Clean Architecture) + Backend Rust (Architecture Hexagonale).

Architecture

Frontend — Clean Architecture (Flutter)

frontend/lib/
├── core/                    # Shared: errors, network, DI setup
└── features/
    └── <feature_name>/
        ├── domain/          # Entities, Repository contracts (abstract), Use Cases
        ├── data/            # Models, DataSources, Repository implementations
        └── presentation/    # Bloc/Cubit, Pages, Widgets

Backend — Architecture Hexagonale (Rust)

backend/src/
├── domain/          # Traits (ports), entités, erreurs métier
├── application/     # Use cases, orchestration
└── infrastructure/  # Adaptateurs : HTTP/REST (axum), persistence (sea-orm)

Règles d'architecture — VIOLATIONS INTERDITES

INTERDIT : importer infrastructure/ ou data/ depuis domain/. Le domain ne dépend de RIEN.
INTERDIT : importer data/ depuis presentation/. La dépendance est presentation → domain ← data.
INTERDIT : mettre de la logique métier dans un Widget, une Page, ou un handler HTTP/REST. La logique métier vit dans domain/ et application/ uniquement.
INTERDIT : écrire un test qui dépend d'un service externe réel. Toujours mocker les ports/traits.
INTERDIT : utiliser unwrap() en code de production Rust. Réservé aux tests uniquement.

Conventions de code

Dart/Flutter

State management : flutter_bloc uniquement (pas de Provider direct, pas de setState pour la logique)
DI : get_it + injectable
Erreurs : Either<Failure, T> via dartz
Tests BDD : bdd_widget_test avec .feature Gherkin
Génération de code : build_runner (freezed, injectable, retrofit)

Read the full file on GitHub · 211 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.

5d ago First seen · 211 lines · 2,142 tokens per session scan A 5b0994cc7261

Subscribe to this mod's changes

devoxx-2026 AGENTS.md is an instructions file published in the GitHub repository b-fontaine/devoxx-2026 (5 stars, last pushed 4mo ago), licensed MIT. It adds 2,142 tokens to every session, about $0.0107 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 2026-08-31.

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

devoxx-2026 AGENTS.md