diff --git a/doc/internals/buffer-api.txt b/doc/internals/api/buffer-api.txt
similarity index 100%
rename from doc/internals/buffer-api.txt
rename to doc/internals/api/buffer-api.txt
diff --git a/doc/internals/filters.txt b/doc/internals/api/filters.txt
similarity index 100%
rename from doc/internals/filters.txt
rename to doc/internals/api/filters.txt
diff --git a/doc/internals/htx-api.txt b/doc/internals/api/htx-api.txt
similarity index 100%
rename from doc/internals/htx-api.txt
rename to doc/internals/api/htx-api.txt
diff --git a/doc/internals/initcalls.txt b/doc/internals/api/initcalls.txt
similarity index 100%
rename from doc/internals/initcalls.txt
rename to doc/internals/api/initcalls.txt