diff --git a/README b/README
index 71ca5e6..1f23b69 100644
--- a/README
+++ b/README
@@ -1,58 +1,63 @@
 SWH-loader-dir
 ==============
 
+# TL;DR
+
+WIP -> Main entry point is scratch/walking.py for the moment
+
+
 The Software Heritage Loader Dir is a tool and a library to walk a local
 Directory and inject into the SWH dataset all unknown contained files.
 
 
 
 Git sha1 computation
 --------------------
 
 ### commit/revision
 
 sha1 git commit/revision computation:
 
     commit `size`\0
     tree `sha1-git-tree-and-subtree-in-plain-hex-string`
     parent `commit-parent`
     author `author-name` <`author-email`> `author-date-ts` `author-date-offset`
     committer `committer-name` <`committer-email`> `committer-date-ts` `committer-date-offset`
 
     `commit-message`
 
 Notes:
 - no newline
 - date offset for example: +0200
 
 ### directory/tree
 
 sha1 git directory/tree computation:
 
     tree `tree-size`\0
     <file-perm> <file-name>\0<file-sha1-in-20-bytes-string>  <- 28 bytes
     <dir-perm> <dir-name>\0<dir-sha1-in-20-bytes-string>     <- 28 bytes
 
 
 Notes:
 - permission is length 6 + space + \0 -> so 8 bytes
 - sha1 is 20 bytes so one row is 28 bytes.
 - tree-size = 28 * number of rows
 - no newline separator
 - What's the entry order? byte
   -> `git mk-tree` does not need to presort the input -> git mktree creates a tree and store in a git file storage -> no go
 
 permissions:
 - 100644 - file
 - 040000 - directory
 - 100755 - executable file
 - 120000 - symbolink link
 
 ### content/file
 
 sha1 git content computation:
 
     blob `blob-size`\0
     `blob-content`
 
 Compress with DEFLATE and compute sha1