diff --git a/README b/README
index d34b0eb..9a23a8f 100644
--- a/README
+++ b/README
@@ -1,67 +1,102 @@
 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.
 
 
+Configuration sample
+--------------------
+
+loader-dir.ini:
+
+    [main]
+
+    dir_path = /path/to/some/directory
+
+    # synthetic origin
+    origin_url = origin-url
+    branch = master
+    authority_id = 1
+    validity = 2015-01-01 00:00:00+00
+
+    # synthetic revision
+    revision_author_name = swh author
+    revision_author_email = swh@inria.fr
+    revision_author_date = 1444054085
+    revision_author_offset = +0200
+    revision_committer_name = swh committer
+    revision_committer_email = swh@inria.fr
+    revision_committer_date = 1444054085
+    revision_committer_offset = +0200
+    revision_type = tar
+    revision_message = synthetic revision message
+
+    # synthetic release
+    release_name = v0.0.1
+    release_date = 1444054085
+    release_offset = +0200
+    release_author_name = swh author
+    release_author_email = swh@inria.fr
+    release_comment = synthetic release
+
+Run
+---
+
+./bin/swh-loader-dir /path/to/loader-dir.ini
+
 
 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 `name` <`email`> `date-ts` `date-offset`
     committer `name` <`email`> `date-ts` `date-offset`
 
     `commit-message`
 
 
 Notes:
 - () denotes optional entry. Indeed, first commit does not contain any parent commit.
 - empty line at the end of the commit message
 - timestamp example: 1444054085
 - 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>...<dir-perm> <dir-name>\0<dir-sha1-in-20-bytes-string>...
 
 
 Notes:
 - no newline separator between tree entries
 - no empty newline at the end of the tree entries
 - tree content header size is the length of the content
 - The tree entries are ordered according to bytes in their <name> properties.
 
 Possible permissions are:
 - 100644 - file
 - 40000  - directory
 - 100755 - executable file
 - 120000 - symbolink link
 - 160000 - git link (relative to submodule)
 
 ### content/file
 
 sha1 git content computation:
 
     blob `blob-size`\0
     `blob-content`
 
 Notes:
 - no newline at the end of the blob content
 
 Compress with DEFLATE and compute sha1