AGENTS.md

This repository is geth, a Rust monorepo for a personal, local-first, Iroh-based mesh runtime. It is not the Ethereum geth client.

geth has one executable only:

Do not add separate gethd or gethctl binaries.

Core Invariants

All remote geth node-to-node communication must be over Iroh.
SSH is not a geth transport and must not become a fallback transport.
SSH keys are admin trust anchors and ecosystem integration points.
SSH certificate flows and SSH proxying are geth-managed workflows carried by local control now and Iroh later.
The daemon owns the Iroh endpoint, local identity, local metadata store, resource registry, module routing, and synchronized data structures.
Discovery is untrusted and never grants capabilities or trust.
Authorization is resource-scoped and capability-based.
Signed data must use deterministic canonical encoding, not arbitrary JSON.
Bearer secrets may grant resource-specific access but must not create trusted node identity or trust graph mutation rights.

Keep crates focused. Do not create a geth-common crate.

Prefer existing crate boundaries and patterns.
Libraries should use thiserror; binaries may use anyhow.
Keep async only where it is useful.
Treat network and control inputs as untrusted.
Do not implement complex cryptographic protocols casually. Add types, roadmap notes, and explicit non-claims when a feature is only scaffolded.
Do not claim Keyhive/BeeKEM-level security properties until they are actually designed, implemented, and tested.
User service installation must target user service managers, not system service managers.

Every behavior change should include tests proportional to risk:

Add unit tests for pure data models, reducers, encoders, path generation, and command builders.
Add integration tests for CLI/daemon behavior when practical.
Use temp directories and temp GETH_HOME values.
Avoid tests that require privileged services, real YubiKeys, real network relays, or host service-manager mutation.
For platform-specific behavior, use generated-definition tests or cfg guards.

Before finishing a code change, run at least:

cargo fmt --all -- --check
cargo check --workspace --all-targets
cargo test --workspace

Also run clippy when reasonable:

cargo clippy --workspace --all-targets -- -D warnings

If a command cannot be run, state why in the final report.

Keep documentation updated with behavior changes:

Update README.md for user-visible commands or workflows.
Update docs/architecture.md for architectural boundaries or invariants.
Add or update ADRs in docs/adr/ for durable decisions.
Update docs/roadmap.md whenever a feature is added, completed, split, or deferred.

Roadmap items should be actionable and checkable:

Use [ ], [~], or [x].
Include acceptance criteria.
Split vague items before implementation.
Do not mark an item done unless the acceptance criteria are met or revised honestly.

Local daemon, local control socket, local identity, local store, local CAS, daemon-owned Iroh endpoint startup, built-in relay-mode config, SSH certificate metadata, revocation metadata, user service definitions, and a pinned geth-iroh endpoint wrapper exist.
Custom relay maps, mDNS discovery, peer auth over Iroh, cr-sqlite, iroh-docs, iroh-gossip, iroh-blobs, Automerge sync, real auth enforcement, OpenSSH KRL generation, and Keyhive/BeeKEM-style authorization are future roadmap items unless implemented later.