---
description: C/H coding patterns for HyBBX core and plugins
globs: "**/*.{c,h}"
alwaysApply: false
---

# HyBBX C conventions

```c
/* ✅ Public API in include/hybbx/ */
hybbx_result_t hybbx_foo_do_thing(hybbx_foo_t *foo, const char *in);

/* ✅ Booleans from INI / config strings */
int enabled = hybbx_parse_bool(value, default_value);

/* ✅ Safe copy */
hybbx_strlcpy(dst, src, sizeof(dst));
```

- Return `HYBBX_ERR_*` from [include/hybbx/types.h](../../include/hybbx/types.h); `HYBBX_OK` on success.
- Plugin wire code stays in `plugins/` — not `src/core/`.
- Packet radio: TNC/AX.25 in `plugins/packet_radio/`; HBX client to `[circuit]`.