# `archive/src/lagrange`
This module is the dataset family for Lagrange-point Chebyshev kernels.
## Contents
- `mod.rs` and `refs.rs` reserve the public module shape.
- `vsop87/` contains the current Sun-Earth L1-L5 Chebyshev kernel payloads
generated from VSOP87-based ephemerides.
## Inspect
```bash
```
## Update
Add new generated kernels under a source-specific subdirectory, keep a
manifest next to the payloads, and record source ephemeris, generator version,
validity interval, target IDs, checksums, and validation errors.
Then run:
```bash
cd archive
cargo run -p archive-validate -- MANIFEST.toml
cargo check --features lagrange
```
## Use
Enable the `lagrange` feature. The current top-level Rust module exposes
references; consumers that need the `.sck` payloads should inspect the
source-specific manifest and load the listed files.