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elodin-syselodin-sys/elodin/AGENTS.md

elodin

AGENTS.md553 starsChanged 5 months agoApache-2.0View on GitHub

Elodin is an open-source platform for rapid design, testing, and simulation of aerospace and physical systems — aerospace's answer to ROS. This monorepo contains the Elodin Editor (3D viewer/graphing), Elodin DB (time-series telemetry database), the Python SDK (nox-py, JAX-based simulation), flight software components, and the Aleph flight computer NixOS configuration (NVIDIA Jetson Orin). For in-depth instructions, read the relevant skill file below when working in that area:

The file

We split this AGENTS.md into the rules it gives an agent

8 rules. About 0 are common, 5 are distinctive, and 3 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈5

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 3

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Always use the nix develop shell when developing changes.

    line 7
  2. Very specific:

    Always use uv inside the nix shell for Python everything (just install sets this up).

    line 8
  3. Distinctive:

    Don't commit changes to git — that's for the developer to do

    line 10
  4. Distinctive:

    When suggesting new dependencies, check they are well supported and maintained.

    line 11
  5. Distinctive:

    Avoid Cargo features. Prefer one supported configuration.

    line 12
  6. Distinctive:

    Never use unsafe Rust code.

    line 13
  7. Distinctive:

    Run all activities from the repository root.

    line 14
  8. Very specific:

    When running cargo test -p elodin-db, prevent crashing with flags: "CARGO_BUILD_JOBS=1 RUST_TEST_THREADS=1 RAYON_NUM_THREADS=1"

    line 15

≈ “Common” is an estimate: at least 1 in 5 of the 40,246 AGENTS.md files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
AGENTS.md

Elodin

Elodin is an open-source platform for rapid design, testing, and simulation of aerospace and physical systems — aerospace's answer to ROS. This monorepo contains the Elodin Editor (3D viewer/graphing), Elodin DB (time-series telemetry database), the Python SDK (nox-py, JAX-based simulation), flight software components, and the Aleph flight computer NixOS configuration (NVIDIA Jetson Orin).

Rules

  • Always use the nix develop shell when developing changes.
  • Always use uv inside the nix shell for Python everything (just install sets this up).
  • Agents build with just install.
  • Don't commit changes to git — that's for the developer to do
  • When suggesting new dependencies, check they are well supported and maintained.
  • Avoid Cargo features. Prefer one supported configuration; add a feature only for a demonstrated platform or dependency boundary, never for speculative optionality or fallback modes.
  • Never use unsafe Rust code.
  • Run all activities from the repository root.
  • When running cargo test -p elodin-db, prevent crashing with flags: "CARGO_BUILD_JOBS=1 RUST_TEST_THREADS=1 RAYON_NUM_THREADS=1"

Quick Start

Python SDK (always build first, so binaries pick it up)

nix develop
just install

CI Checks

cargo fmt && cargo test && cargo clippy -- -Dwarnings   # Rust
ruff format --check && ruff check --fix                  # Python
alejandra                                                # Nix

Detailed Guidance

For in-depth instructions, read the relevant skill file below when working in that area:

  • Creating simulations (Python SDK, components, systems, 6DOF, visualization, SITL/HITL): .cursor/skills/elodin-simulation/SKILL.md
  • Monte Carlo + truth data (calibrating sims against experimental data, campaign specs/hooks, truth-replay ghosts, run scoring, reconstruction): .cursor/skills/elodin-monte-carlo/SKILL.md
  • Contributing to the codebase (building from source, architecture, workspace structure, testing): .cursor/skills/elodin-dev/SKILL.md
  • Rust style (error types, API design don'ts): .cursor/skills/rust/SKILL.md
  • Aleph flight computer (AlephOS deployment, NixOS modules, flight software services, firmware): .cursor/skills/elodin-aleph/SKILL.md
  • Elodin DB (running the database, client integrations, replication/follow mode, Lua REPL): .cursor/skills/elodin-db/SKILL.md
  • Elodin Editor (Bevy/Egui architecture, hot-reload, viewport, telemetry graphs, KDL schematics): .cursor/skills/elodin-editor-dev/SKILL.md
  • Headless editor capture (Gamescope, screenshots, PipeWire, video capture): .cursor/skills/elodin-headless-capture/SKILL.md
  • Python SDK internals (PyO3 bindings, nox-py, JAX integration, adding components/systems): .cursor/skills/nox-py-dev/SKILL.md
  • Nix environment (dev shell troubleshooting, OrbStack VMs, flake.nix, binary cache): .cursor/skills/elodin-nix/SKILL.md

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