diff --git a/crates/kebab-app/tests/ingest_log_smoke.rs b/crates/kebab-app/tests/ingest_log_smoke.rs
new file mode 100644
index 0000000..20c0344
--- /dev/null
+++ b/crates/kebab-app/tests/ingest_log_smoke.rs
@@ -0,0 +1,153 @@
+// crates/kebab-app/tests/ingest_log_smoke.rs
+//
+// Integration tests for ingest_log feature (v0.20.x). Spec §5 AC-9 + AC-6.
+
+use std::path::PathBuf;
+
+use tempfile::TempDir;
+use kebab_app::{IngestOpts, ingest_with_config_opts};
+use kebab_config::{Config, LoggingCfg};
+use kebab_core::SourceScope;
+use serde_json::Value;
+
+fn minimal_config(workspace: &std::path::Path, log_dir: &std::path::Path) -> Config {
+    let data_dir = workspace.parent().unwrap().join("data");
+    std::fs::create_dir_all(&data_dir).unwrap();
+    let model_dir = workspace.parent().unwrap().join("models");
+    std::fs::create_dir_all(&model_dir).unwrap();
+
+    let mut cfg = Config::defaults();
+    cfg.workspace.root = workspace.to_string_lossy().into_owned();
+    cfg.workspace.exclude.clear();
+    cfg.storage.data_dir = data_dir.to_string_lossy().into_owned();
+    cfg.storage.model_dir = model_dir.to_string_lossy().into_owned();
+    cfg.models.embedding.provider = "none".to_string();
+    cfg.models.embedding.dimensions = 0;
+    cfg.chunking.target_tokens = 80;
+    cfg.chunking.overlap_tokens = 20;
+    cfg.logging = LoggingCfg {
+        ingest_log_enabled: true,
+        ingest_log_dir: log_dir.to_path_buf(),
+    };
+    cfg
+}
+
+/// AC-9: ingest → log file exists + each line valid JSON + last line kind=summary + scanned>0.
+#[test]
+fn ingest_log_smoke() {
+    let tmp = TempDir::new().unwrap();
+    let workspace = tmp.path().join("kb");
+    std::fs::create_dir_all(&workspace).unwrap();
+    let log_dir = tmp.path().join("logs");
+
+    // 1. Minimal corpus: 1 markdown + 1 scanned PDF (OCR disabled — no Ollama needed).
+    std::fs::write(workspace.join("hello.md"), "# Hello\n\nThis is a smoke test.\n").unwrap();
+    let pdf_src = PathBuf::from("../kebab-parse-pdf/tests/fixtures/scanned_page1.pdf");
+    if pdf_src.exists() {
+        std::fs::copy(&pdf_src, workspace.join("scanned.pdf")).unwrap();
+    }
+
+    // 2. Config with logging enabled.
+    let cfg = minimal_config(&workspace, &log_dir);
+    let scope = SourceScope {
+        root: workspace.clone(),
+        exclude: vec![],
+        ..Default::default()
+    };
+
+    // 3. Run ingest.
+    ingest_with_config_opts(cfg, scope, false, IngestOpts::default())
+        .expect("ingest should succeed");
+
+    // 4. Assert log file exists in log_dir.
+    let log_files: Vec<_> = std::fs::read_dir(&log_dir)
+        .unwrap()
+        .filter_map(|e| e.ok())
+        .filter(|e| {
+            e.file_name().to_string_lossy().starts_with("ingest-")
+                && e.file_name().to_string_lossy().ends_with(".ndjson")
+        })
+        .collect();
+    assert_eq!(log_files.len(), 1, "expected exactly 1 ingest-*.ndjson file, found: {log_files:?}");
+
+    // 5. Parse each line as JSON — assert kind field present and valid.
+    let body = std::fs::read_to_string(log_files[0].path()).unwrap();
+    let lines: Vec<&str> = body.lines().collect();
+    assert!(!lines.is_empty(), "log file should not be empty");
+
+    let valid_kinds = ["ocr", "parse_error", "skip", "error", "summary"];
+    for line in &lines {
+        let v: Value = serde_json::from_str(line)
+            .unwrap_or_else(|e| panic!("line is not valid JSON: {e}\nline: {line}"));
+        let kind = v.get("kind")
+            .and_then(|k| k.as_str())
+            .unwrap_or_else(|| panic!("line missing 'kind' field: {line}"));
+        assert!(
+            valid_kinds.contains(&kind),
+            "unexpected kind '{kind}' in line: {line}"
+        );
+    }
+
+    // 6. Last line must be kind=summary with scanned > 0.
+    let last = lines.last().unwrap();
+    let last_v: Value = serde_json::from_str(last).unwrap();
+    assert_eq!(
+        last_v.get("kind").and_then(|k| k.as_str()),
+        Some("summary"),
+        "last line must be kind=summary, got: {last}"
+    );
+    let scanned = last_v.get("scanned").and_then(|s| s.as_u64()).unwrap_or(0);
+    assert!(scanned > 0, "summary.scanned should be > 0, got: {last}");
+}
+
+/// AC-6: ingest_log_enabled=false → no log file created.
+#[test]
+fn ingest_log_disabled_emits_no_file() {
+    let tmp = TempDir::new().unwrap();
+    let workspace = tmp.path().join("kb");
+    std::fs::create_dir_all(&workspace).unwrap();
+    let log_dir = tmp.path().join("logs");
+
+    std::fs::write(workspace.join("hello.md"), "# Hello\n\nDisabled log test.\n").unwrap();
+
+    let data_dir = tmp.path().join("data");
+    std::fs::create_dir_all(&data_dir).unwrap();
+    let model_dir = tmp.path().join("models");
+    std::fs::create_dir_all(&model_dir).unwrap();
+
+    let mut cfg = Config::defaults();
+    cfg.workspace.root = workspace.to_string_lossy().into_owned();
+    cfg.workspace.exclude.clear();
+    cfg.storage.data_dir = data_dir.to_string_lossy().into_owned();
+    cfg.storage.model_dir = model_dir.to_string_lossy().into_owned();
+    cfg.models.embedding.provider = "none".to_string();
+    cfg.models.embedding.dimensions = 0;
+    cfg.logging = LoggingCfg {
+        ingest_log_enabled: false,
+        ingest_log_dir: log_dir.clone(),
+    };
+
+    let scope = SourceScope {
+        root: workspace.clone(),
+        exclude: vec![],
+        ..Default::default()
+    };
+
+    ingest_with_config_opts(cfg, scope, false, IngestOpts::default())
+        .expect("ingest should succeed");
+
+    // log_dir should either not exist or contain 0 ingest-*.ndjson files.
+    let log_file_count = if log_dir.exists() {
+        std::fs::read_dir(&log_dir)
+            .unwrap()
+            .filter_map(|e| e.ok())
+            .filter(|e| {
+                e.file_name().to_string_lossy().starts_with("ingest-")
+                    && e.file_name().to_string_lossy().ends_with(".ndjson")
+            })
+            .count()
+    } else {
+        0
+    };
+    assert_eq!(log_file_count, 0, "no ingest-*.ndjson file should be created when disabled");
+}