feat(ingestion): simplify brain to knowledge/ — write and search use same dir

ingestion/internal/api/handler.go

@@ -79,7 +79,7 @@ func (h *Handler) Write(w http.ResponseWriter, r *http.Request) {
 		filename = fmt.Sprintf("%s-auto.md", time.Now().UTC().Format("2006-01-02-150405"))
 	}
 
-	rawDir := filepath.Join(h.brainDir, "raw")
+	rawDir := filepath.Join(h.brainDir, "knowledge")
 	if err := os.MkdirAll(rawDir, 0o755); err != nil {
 		http.Error(w, "failed to create raw dir", http.StatusInternalServerError)
 		return

ingestion/internal/api/handler_test.go

@@ -20,10 +20,9 @@ import (
 func setup(t *testing.T) (string, *api.Handler) {
 	t.Helper()
 	dir := t.TempDir()
-	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "concepts"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "knowledge"), 0o755))
-	require.NoError(t, os.MkdirAll(filepath.Join(dir, "raw"), 0o755))
 	require.NoError(t, os.WriteFile(
-		filepath.Join(dir, "wiki", "concepts", "tdd.md"),
+		filepath.Join(dir, "knowledge", "tdd.md"),
 		[]byte("---\ntitle: TDD\ndomain: software\n---\n\nTest-driven development is a discipline.\n"),
 		0o644,
 	))
@@ -46,7 +45,7 @@ func TestQuery_ReturnsResults(t *testing.T) {
 	assert.NotEmpty(t, results)
 }
 
-func TestWrite_CreatesRawFile(t *testing.T) {
+func TestWrite_CreatesKnowledgeFile(t *testing.T) {
 	dir, h := setup(t)
 	body, _ := json.Marshal(map[string]any{
 		"content":  "# Test note\n\nSome content.",
@@ -62,8 +61,7 @@ func TestWrite_CreatesRawFile(t *testing.T) {
 	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
 	assert.NotEmpty(t, resp["path"])
 
-	written := filepath.Join(dir, "raw", "test-note.md")
+	content, err := os.ReadFile(filepath.Join(dir, "knowledge", "test-note.md"))
-	content, err := os.ReadFile(written)
 	require.NoError(t, err)
 	assert.Contains(t, string(content), "Some content.")
 }
@@ -93,7 +91,7 @@ func TestWrite_IncludesFrontmatterWhenTypeProvided(t *testing.T) {
 	h.Write(rec, req)
 
 	assert.Equal(t, http.StatusOK, rec.Code)
-	content, err := os.ReadFile(filepath.Join(dir, "raw", "typed-note.md"))
+	content, err := os.ReadFile(filepath.Join(dir, "knowledge", "typed-note.md"))
 	require.NoError(t, err)
 	assert.Contains(t, string(content), "type: concept")
 	assert.Contains(t, string(content), "domain: software")
@@ -109,7 +107,8 @@ func TestWrite_GeneratesFilenameIfAbsent(t *testing.T) {
 	h.Write(rec, req)
 
 	assert.Equal(t, http.StatusOK, rec.Code)
-	entries, _ := os.ReadDir(filepath.Join(dir, "raw"))
+	entries, _ := os.ReadDir(filepath.Join(dir, "knowledge"))
-	assert.Len(t, entries, 1)
+	// +1 because setup already wrote tdd.md
-	assert.True(t, strings.HasSuffix(entries[0].Name(), ".md"))
+	assert.Len(t, entries, 2)
+	assert.True(t, strings.HasSuffix(entries[1].Name(), ".md"))
 }

ingestion/internal/search/search.go

@@ -33,7 +33,7 @@ func Query(brainDir, query string, limit int) ([]Result, error) {
 
 	var results []Result
 
-	err := filepath.WalkDir(filepath.Join(brainDir, "wiki"), func(path string, d os.DirEntry, err error) error {
+	err := filepath.WalkDir(filepath.Join(brainDir, "knowledge"), func(path string, d os.DirEntry, err error) error {
 		if err != nil {
 			slog.Warn("search: skipping path", "path", path, "err", err)
 			return nil

ingestion/internal/search/search_test.go

@@ -14,17 +14,15 @@ import (
 
 func TestSearch_ReturnsMatchingPages(t *testing.T) {
 	dir := t.TempDir()
-	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "concepts"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "knowledge"), 0o755))
 
-	// Write a concept page mentioning "retry"
 	require.NoError(t, os.WriteFile(
-		filepath.Join(dir, "wiki", "concepts", "retry-logic.md"),
+		filepath.Join(dir, "knowledge", "retry-logic.md"),
 		[]byte("---\ntitle: Retry Logic\ndomain: software\n---\n\nRetry logic handles transient failures by re-attempting operations.\n"),
 		0o644,
 	))
-	// Write an unrelated page
 	require.NoError(t, os.WriteFile(
-		filepath.Join(dir, "wiki", "concepts", "database.md"),
+		filepath.Join(dir, "knowledge", "database.md"),
 		[]byte("---\ntitle: Database\ndomain: software\n---\n\nA database stores structured data.\n"),
 		0o644,
 	))
@@ -32,7 +30,7 @@ func TestSearch_ReturnsMatchingPages(t *testing.T) {
 	results, err := search.Query(dir, "retry transient", 5)
 	require.NoError(t, err)
 	require.Len(t, results, 1)
-	assert.Equal(t, "wiki/concepts/retry-logic.md", results[0].Path)
+	assert.Equal(t, "knowledge/retry-logic.md", results[0].Path)
 	assert.Equal(t, "Retry Logic", results[0].Title)
 	assert.Greater(t, results[0].Score, 0)
 	assert.Contains(t, results[0].Excerpt, "Retry")
@@ -40,10 +38,10 @@ func TestSearch_ReturnsMatchingPages(t *testing.T) {
 
 func TestSearch_RespectsLimit(t *testing.T) {
 	dir := t.TempDir()
-	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "concepts"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "knowledge"), 0o755))
 	for i := 0; i < 5; i++ {
 		require.NoError(t, os.WriteFile(
-			filepath.Join(dir, "wiki", "concepts", fmt.Sprintf("page-%d.md", i)),
+			filepath.Join(dir, "knowledge", fmt.Sprintf("page-%d.md", i)),
 			[]byte(fmt.Sprintf("---\ntitle: Page %d\n---\n\nThis page mentions retry.\n", i)),
 			0o644,
 		))