diff --git a/.gitignore b/.gitignore
index 29ce563..9d87b33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ sysroot
 .peru
 __pycache__
 /venv
+compile_commands.json
diff --git a/configs/rules.ninja b/configs/rules.ninja
index 53f774c..905ba97 100644
--- a/configs/rules.ninja
+++ b/configs/rules.ninja
@@ -76,3 +76,6 @@ rule strip
 
 rule touch
     command = touch $out
+
+rule compdb
+    command = ninja -t compdb > $out
diff --git a/scripts/bonnibel/module.py b/scripts/bonnibel/module.py
index 458f6cb..4fa6439 100644
--- a/scripts/bonnibel/module.py
+++ b/scripts/bonnibel/module.py
@@ -141,7 +141,7 @@ class Module:
 
             inputs = []
             parse_deps = []
-            parse_dep = "${module_dir}/.parse_dep.phony"
+            parse_depfile = "${module_dir}/.parse_dep.phony"
 
             for start in self.sources:
                 source = start
@@ -150,7 +150,7 @@ class Module:
                     output = source.output
 
                     if source.action.parse_deps:
-                        oodeps = [parse_dep]
+                        oodeps = [parse_depfile]
                     else:
                         oodeps = []
 
@@ -177,7 +177,7 @@ class Module:
             build.newline()
             build.build(
                 rule = "touch",
-                outputs = [parse_dep],
+                outputs = [parse_depfile],
                 implicit = child_deps,
                 order_only = parse_deps,
             )
diff --git a/scripts/bonnibel/project.py b/scripts/bonnibel/project.py
index 42e865c..6a4802c 100644
--- a/scripts/bonnibel/project.py
+++ b/scripts/bonnibel/project.py
@@ -142,6 +142,8 @@ class Project:
                 build.default([out])
                 build.newline()
 
+            compdb = "${source_root}/compile_commands.json"
+
             build.rule("regen",
                 command = " ".join([str(root / 'configure')] + sys.argv[1:]),
                 description = "Regenerate build files",
@@ -156,6 +158,14 @@ class Project:
             for target in targets:
                 regen_implicits += target.depfiles
 
+            build.build(
+                rule = "compdb",
+                outputs = [compdb],
+                implicit = regen_implicits,
+                )
+            build.default([compdb])
+            build.newline()
+
             build.build(
                 rule = "regen",
                 outputs = ['build.ninja'],