feat: scaffold v0.1 foundation

tests/cli.rs

@@ -0,0 +1,43 @@
+#![allow(clippy::expect_used)]
+#![doc = "Black-box CLI framing and exit-status tests."]
+
+use std::process::Command;
+
+#[test]
+fn unimplemented_operation_is_a_typed_json_runtime_failure() {
+    let output = Command::new(env!("CARGO_BIN_EXE_ghidr"))
+        .arg("doctor")
+        .output()
+        .expect("run ghidr");
+    assert_eq!(output.status.code(), Some(1));
+    assert!(output.stdout.is_empty());
+    let error: serde_json::Value =
+        serde_json::from_slice(&output.stderr).expect("valid JSON error");
+    assert_eq!(error["error"]["code"], "internal_not_implemented");
+    assert_eq!(error["error"]["details"]["operation"], "doctor");
+}
+
+#[test]
+fn invalid_invocation_is_one_json_document_on_stderr() {
+    let output = Command::new(env!("CARGO_BIN_EXE_ghidr"))
+        .args(["functions", "sample", "--limit", "0"])
+        .output()
+        .expect("run ghidr");
+    assert_eq!(output.status.code(), Some(2));
+    assert!(output.stdout.is_empty());
+    let error: serde_json::Value =
+        serde_json::from_slice(&output.stderr).expect("valid JSON error");
+    assert_eq!(error["error"]["code"], "invalid_arguments");
+    assert_eq!(output.stderr.last(), Some(&b'\n'));
+}
+
+#[test]
+fn explicit_human_parse_failure_is_not_json() {
+    let output = Command::new(env!("CARGO_BIN_EXE_ghidr"))
+        .args(["--format", "human", "decompile", "sample"])
+        .output()
+        .expect("run ghidr");
+    assert_eq!(output.status.code(), Some(2));
+    assert!(output.stdout.is_empty());
+    assert!(serde_json::from_slice::<serde_json::Value>(&output.stderr).is_err());
+}