# cards2pack-core
`cards2pack-core` is a pure-Rust library that converts Adaptive Card JSON sequences into
[YGTc 2.0](https://docs.greentic.ai) flow YAML for use in Greentic bundles.
It is deliberately free of async runtimes, filesystem I/O, and subprocess calls so that
it can be compiled to `wasm32-wasip2` without modifications.
## Features
- Parses card sequences (AdaptiveCard + HTTP node entries) from JSON
- Builds a routing graph that respects `routeToCardId` and preserves back-edges
- Emits deterministic YGTc 2.0 YAML with `when:` conditional routes
- Fixes four bugs present in the legacy `greentic-cards2pack` v0.4 converter:
- Alphabetical-ordering instead of `routeToCardId`-driven routing
- `demo_wrapup` incorrectly chosen as flow start
- `routeToCardId` field silently ignored in some card shapes
- Schema bloat duplicating flat fields outside `card.call.payload`
## Usage
```rust
use cards2pack_core::{parse_cards, convert, ConvertOptions};
let cards = parse_cards(json_str)?;
let result = convert(&cards, &ConvertOptions {
flow_name: "my-flow".into(),
strict: false,
})?;
println!("{}", result.flow_yaml);
```