Config guide: Document workflow related configuration parameters

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I756aeb2ae586eaa797e503da864855922d32c775
diff --git a/resources/Documentation/config-guide.md b/resources/Documentation/config-guide.md
index 454102b..b48385d 100644
--- a/resources/Documentation/config-guide.md
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@@ -16,7 +16,50 @@
 domain. All this configuration is covered in detail by the [setup
 guide](setup-guide.html).
 
-## TODO
+## <a id="workflow">Workflow Configuration
+
+Some of the configuration parameters have an effect on the user workflow.
+
+### <a id="implicitApprovals">Implicit code owner approvals
+
+It's possible to [enable implicit approvals](config.html#pluginCodeOwnersEnableImplicitApprovals)
+of code owners on their own changes. If enabled and the uploader of a patch set
+is a code owner, an approval of the uploader is assumed for all owned files.
+This means if a code owner uploads a change / patch set that only touches files
+that they own, no approval from other code owners is required for submitting the
+change.
+
+If implicit approvals are enabled, paths can be exempted from requiring code
+owner approvals by assigning the code ownership to [all
+users](backend-find-owners.html#allUsers), as then any modification to the path
+is always implicitly approved by the uploader.
+
+**NOTE:** If implicit approvals are disabled, users can still self-approve their
+own changes by voting on the required label.
+
+### <a id="mergeCommits">Required code owner approvals on merge commits
+
+For merge commits the list of modified files depends on the base against which
+the merge commit is compared:
+
+1. comparison against the destination branch (aka first parent commit):
+   All files which differ between the merge commit and the destination branch.
+   This includes all files which have been modified in the source branch since
+   the last merge into the destination branch has been done.
+
+2. comparison against the Auto-Merge (Auto-Merge = result of automatically
+   merging the source branch into the destination branch):
+   Only shows files for which a conflict resolution has been done.
+
+Which files a users sees on the change screen depends on their base selection.
+
+For the `@PLUGIN@` plugin it can be configured [which files of a merge commit
+require code owner approvals](config.html#pluginCodeOwnersMergeCommitStrategy),
+all files that differ with the destination branch (case 1) or only files that
+differ with the Auto-Merge (case 2). If case 1 is configured, all file diffs
+that have been approved in one branch must be re-approved when they are merged
+into another branch. If case 2 is configured, only conflict resolutions have to
+be approved when a merge is done.
 
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