new library structure

notes/tasks.md

@@ -21,3 +21,15 @@ See:
   Note: If <mediatype> is omitted, it defaults to text/plain;charset=US-ASCII.
 - https://en.wikipedia.org/wiki/Data_URI_scheme,
 - https://developer.mozilla.org/en-US/docs/web/http/basics_of_http/data_urls.
+
+### New Library Structure
+
+- `IO-trait` a trait with a minimal set of I/O operations.
+- `common` a library with common functions, including I/O extensions. Depends on
+  - `IO-trait`.
+- `IO-impl` an implementation of `IO` for the local file system. Depends on
+  - `IO-trait`.
+  - `common`.
+- `IO-test` a mock implementation of `IO` for testing. Depends on
+  - `IO-trait`.
+  - `common`.