# Coco/R diagnostics through LSP

Version 0.1.7 adds the first real Language Server connection. The Theia/VS
Code extension starts `out/server.js` through `vscode-languageclient`; the
server invokes a configured executable containing the **generated Coco/R
parser/validator**.

## Oberon dialects (`.Mod` / `.mod` / `.def`, Ulmo `.om` / `.od`)

The server validates Oberon files with the pilot validators from
`grammars/`. Each pilot binary takes the source file as its single
argument and writes a `.LST` listing next to it; the server parses the
listing's `***** ^ message` lines (positions are caret-relative to the
code after the listing prefix, zero-based columns).

```json
"modula2.oberon.dialect": "oberon2",
"modula2.oberon.validators": {
  "oberon07": "<root>/grammars/Oberon07/build/O07",
  "oberon2": "<root>/grammars/Oberon2/build/O2",
  "ulm": "<root>/grammars/Ulm/build/Ulm"
}
```

Build each binary first with its pilot `build.sh` (needs `CR` and
`gm2 -fiso`). The local Modula-2 analysis never runs on Oberon text.
With no command configured for the active dialect the server publishes
no diagnostics.