init: archlens — architecture diagram generator

Hex arch + DDD, tree-sitter parsing, Mermaid/ASCII output.
Supports Rust + Python. 92 tests. CI, diff, --check for staleness detection.

crates/adapters/stdout-writer/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "archlens-stdout-writer"
+version = "0.1.0"
+edition = "2024"
+publish = false
+
+[dependencies]
+archlens-domain.workspace = true
+thiserror.workspace = true
+tracing.workspace = true

crates/adapters/stdout-writer/src/lib.rs

@@ -0,0 +1,3 @@
+mod stdout_output_writer;
+
+pub use stdout_output_writer::StdoutOutputWriter;

crates/adapters/stdout-writer/src/stdout_output_writer.rs

@@ -0,0 +1,24 @@
+use archlens_domain::{DomainError, RenderOutput, ports::OutputWriter};
+
+pub struct StdoutOutputWriter;
+
+impl Default for StdoutOutputWriter {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl StdoutOutputWriter {
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl OutputWriter for StdoutOutputWriter {
+    fn write(&self, output: &RenderOutput) -> Result<(), DomainError> {
+        for file in output.files() {
+            println!("{}", file.content());
+        }
+        Ok(())
+    }
+}

crates/adapters/stdout-writer/tests/stdout_writer_tests.rs

@@ -0,0 +1,12 @@
+use archlens_domain::{RenderOutput, RenderedFile, ports::OutputWriter};
+use archlens_stdout_writer::StdoutOutputWriter;
+
+#[test]
+fn writes_without_error() {
+    let writer = StdoutOutputWriter::new();
+    let file = RenderedFile::new("arch.mmd", "classDiagram").unwrap();
+    let output = RenderOutput::single(file);
+
+    let result = writer.write(&output);
+    assert!(result.is_ok());
+}