doc: update AGENTS.md

Author: VanyaGlazunov

AGENTS.md

@@ -26,7 +26,8 @@ pathrex/
 │   │   └── inmemory.rs         # InMemory marker, InMemoryBuilder, InMemoryGraph
 │   └── formats/
 │       ├── mod.rs              # FormatError enum, re-exports
-│       └── csv.rs              # Csv<R> — CSV → Edge iterator (CsvConfig, ColumnSpec)
+│       ├── csv.rs              # Csv<R> — CSV → Edge iterator (CsvConfig, ColumnSpec)
+│       └── nt.rs               # NTriples<R> — N-Triples → Edge iterator (LabelExtraction)
 ├── tests/
 │   └── inmemory_tests.rs       # Integration tests for InMemoryBuilder / InMemoryGraph
 ├── deps/
@@ -187,9 +188,13 @@ into a single graph.
 
 ### Format parsers
 
-[`Csv<R>`](src/formats/csv.rs:52) is the only built-in parser. It yields
-`Iterator<Item = Result<Edge, FormatError>>` and is directly pluggable into
-`GraphBuilder::load()` via its `GraphSource<InMemoryBuilder>` impl.
+Two built-in parsers are available, both yielding
+`Iterator<Item = Result<Edge, FormatError>>` and pluggable into
+`GraphBuilder::load()` via their `GraphSource<InMemoryBuilder>` impls.
+
+#### `Csv<R>`
+
+[`Csv<R>`](src/formats/csv.rs:52) parses delimiter-separated edge files.
 
 Configuration is via [`CsvConfig`](src/formats/csv.rs:17):
 
@@ -204,6 +209,27 @@ Configuration is via [`CsvConfig`](src/formats/csv.rs:17):
 [`ColumnSpec`](src/formats/csv.rs:11) is either `Index(usize)` or `Name(String)`.
 Name-based lookup requires `has_header: true`.
 
+#### `NTriples<R>`
+
+[`NTriples<R>`](src/formats/nt.rs:57) parses [W3C N-Triples](https://www.w3.org/TR/n-triples/)
+RDF files using `oxttl`. Each triple `(subject, predicate, object)` becomes an
+[`Edge`](src/graph/mod.rs:154) where:
+
+- `source` — subject IRI or blank-node ID (`_:label`).
+- `target` — object IRI or blank-node ID; triples whose object is an RDF
+  literal yield `Err(FormatError::LiteralAsNode)` (callers may filter these out).
+- `label` — predicate IRI, transformed by [`LabelExtraction`](src/formats/nt.rs:36):
+
+| Variant | Behaviour |
+|---|---|
+| `LocalName` (default) | Fragment (`#name`) or last path segment of the predicate IRI |
+| `FullIri` | Full predicate IRI string |
+
+Constructors:
+
+- [`NTriples::new(reader)`](src/formats/nt.rs:72) — uses `LabelExtraction::LocalName`.
+- [`NTriples::with_label_extraction(reader, strategy)`](src/formats/nt.rs:76) — explicit strategy.
+
 ### FFI layer
 
 [`lagraph_sys`](src/lagraph_sys.rs) exposes raw C bindings for GraphBLAS and
@@ -254,7 +280,7 @@ Tests in `src/graph/mod.rs` use `CountingBuilder` / `CountOutput` / `VecSource`
 [`src/utils.rs`](src/utils.rs) — these do **not** call into GraphBLAS and run without
 native libraries.
 
-Tests in `src/formats/csv.rs` are pure Rust and need no native dependencies.
+Tests in `src/formats/csv.rs` and `src/formats/nt.rs` are pure Rust and need no native dependencies.
 
 Tests in `src/graph/inmemory.rs` and [`tests/inmemory_tests.rs`](tests/inmemory_tests.rs)
 call real GraphBLAS/LAGraph and require the native libraries to be present.

src/graph/mod.rs

@@ -109,7 +109,7 @@ impl LagraphGraph {
         Self::new(matrix, kind)
     }
 
-    pub fn check_graph(&self) -> Result<(), GraphError>  {
+    pub fn check_graph(&self) -> Result<(), GraphError> {
         la_ok!(LAGraph_CheckGraph(self.inner))
     }
 }