diff --git a/src/lib/source-lifecycle.test.ts b/src/lib/source-lifecycle.test.ts
index 1450179f1..2211f511f 100644
--- a/src/lib/source-lifecycle.test.ts
+++ b/src/lib/source-lifecycle.test.ts
@@ -60,6 +60,21 @@ describe("source-lifecycle path helpers", () => {
     expect(isIngestableSourcePath("C:\\project\\raw\\sources\\book.MOBI")).toBe(true)
   })
 
+  it("accepts code file extensions and handles case insensitivity", () => {
+    // lower-case code extensions
+    expect(isIngestableSourcePath("raw/sources/app.ts")).toBe(true)
+    expect(isIngestableSourcePath("raw/sources/app.tsx")).toBe(true)
+    expect(isIngestableSourcePath("raw/sources/lib.py")).toBe(true)
+    // mixed-case code extensions
+    expect(isIngestableSourcePath("raw/sources/MyClass.JAVA")).toBe(true)
+    expect(isIngestableSourcePath("C:\\project\\raw\\sources\\utils.CS")).toBe(true)
+    expect(isIngestableSourcePath("raw/sources/Component.Tsx")).toBe(true)
+    // still rejects unknown extensions
+    expect(isIngestableSourcePath("raw/sources/notes.xyz")).toBe(false)
+    // still rejects dotfiles even with valid code extensions
+    expect(isIngestableSourcePath("raw/sources/.eslintrc.json")).toBe(false)
+  })
+
   it("derives folder context from absolute raw/sources paths without leaking the project prefix", () => {
     expect(
       folderContextForSourcePath("/tmp/project/raw/sources/reports/2026/report.pdf"),
diff --git a/src/lib/source-lifecycle.ts b/src/lib/source-lifecycle.ts
index 946e1b683..901ccd4f9 100644
--- a/src/lib/source-lifecycle.ts
+++ b/src/lib/source-lifecycle.ts
@@ -64,6 +64,20 @@ export const INGESTABLE_SOURCE_EXTENSIONS = new Set([
   "epub",
   "mobi",
   "org",
+  // Code file extensions
+  "js",
+  "ts",
+  "jsx",
+  "tsx",
+  "py",
+  "java",
+  "c",
+  "cpp",
+  "cs",
+  "rb",
+  "go",
+  "rs",
+  "php",
 ])
 
 function flattenFiles(nodes: FileNode[]): FileNode[] {
diff --git a/src/lib/source-watch-config.test.ts b/src/lib/source-watch-config.test.ts
index 8ad2f95ce..6d4c4178d 100644
--- a/src/lib/source-watch-config.test.ts
+++ b/src/lib/source-watch-config.test.ts
@@ -36,6 +36,27 @@ describe("source watch config", () => {
     expect(isPathAllowedBySourceWatch("raw/sources/~$Document.docx", config)).toBe(false)
   })
 
+  it("rejects code extensions under default config", () => {
+    expect(isPathAllowedBySourceWatch("raw/sources/app.ts", DEFAULT_SOURCE_WATCH_CONFIG)).toBe(false)
+    expect(isPathAllowedBySourceWatch("raw/sources/lib.py", DEFAULT_SOURCE_WATCH_CONFIG)).toBe(false)
+    expect(isPathAllowedBySourceWatch("raw/sources/main.go", DEFAULT_SOURCE_WATCH_CONFIG)).toBe(false)
+  })
+
+  it("allows code extensions when explicitly included", () => {
+    const config = normalizeSourceWatchConfig({
+      includeExtensions: ["js", "ts", "tsx", "py", "go", "rs", "php"],
+    })
+
+    expect(isPathAllowedBySourceWatch("raw/sources/app.ts", config)).toBe(true)
+    expect(isPathAllowedBySourceWatch("raw/sources/lib.py", config)).toBe(true)
+    expect(isPathAllowedBySourceWatch("raw/sources/main.go", config)).toBe(true)
+    expect(isPathAllowedBySourceWatch("raw/sources/lib.rs", config)).toBe(true)
+    // still rejects unknown extensions
+    expect(isPathAllowedBySourceWatch("raw/sources/notes.xyz", config)).toBe(false)
+    // still rejects dotfiles
+    expect(isPathAllowedBySourceWatch("raw/sources/.hidden.ts", config)).toBe(false)
+  })
+
   it("normalizes comma-separated exclusion values from text fields", () => {
     const config = normalizeSourceWatchConfig({
       includeExtensions: ["md, pdf", "docx"],
diff --git a/src/lib/source-watch-config.ts b/src/lib/source-watch-config.ts
index 2ac9abece..9d67b4153 100644
--- a/src/lib/source-watch-config.ts
+++ b/src/lib/source-watch-config.ts
@@ -25,6 +25,11 @@ export const SOURCE_WATCH_FILE_TYPE_GROUPS = [
     id: "data",
     extensions: ["json", "yaml", "yml", "xml"],
   },
+  // Code files
+  {
+    id: "code",
+    extensions: ["js", "ts", "jsx", "tsx", "py", "java", "c", "cpp", "cs", "rb", "go", "rs", "php"],
+  },
 ]
 
 function normalizeExtensions(values: readonly string[] | undefined): string[] {