diff --git a/scripts/arcanist.php b/scripts/arcanist.php
index 99af52e8..83eebff2 100755
--- a/scripts/arcanist.php
+++ b/scripts/arcanist.php
@@ -40,12 +40,19 @@ foreach ($args as $key => $arg) {
   } else if ($arg == '--trace') {
     unset($args[$key]);
     $config_trace_mode = true;
+  } else if ($arg == '--no-ansi') {
+    unset($args[$key]);
+    PhutilConsoleFormatter::disableANSI(true);
   } else if (preg_match('/^--load-phutil-library=(.*)$/', $arg, $matches)) {
     unset($args[$key]);
     $load['?'] = $matches[1];
   }
 }
 
+if (!posix_isatty(STDOUT)) {
+  PhutilConsoleFormatter::disableANSI(true);
+}
+
 $args = array_values($args);
 
 try {
diff --git a/src/docs/arcconfig.diviner b/src/docs/arcconfig.diviner
new file mode 100644
index 00000000..c7085e4c
--- /dev/null
+++ b/src/docs/arcconfig.diviner
@@ -0,0 +1,53 @@
+@title Setting Up .arcconfig
+@group config
+
+This document describes how to configure Arcanist projects with ##.arcconfig##
+files.
+
+= .arcconfig Basics =
+
+Arcanist uses ##.arcconfig## files to determine a number of things about project
+configuration. For instance, these are things it figures out from 
+##.arcconfig##:
+
+  - where the logical root directory of a project is;
+  - which server Arcanist should send diffs to for code review; and
+  - which lint rules should be applied.
+
+An ##.arcconfig## file is a JSON file which you check into your project's root.
+A simple, valid file looks something like this:
+
+  {
+    "project_id" : "some_project_name",
+    "conduit_uri" : "https://phabricator.example.com/api/"
+  }
+  
+Here's what these options mean:
+
+  - **project_id**: a human-readable string identifying the project
+  - **conduit_uri**: the Conduit API URI for the Phabricator installation that
+    Arcanist should send diffs to for review. Generally, if you access
+    Phabricator at ##https://phabricator.example.com/##, the **conduit_uri** is
+    ##https://phabricator.example.com/api/##. Be mindful about "http" vs 
+    "https".
+    
+For an exhaustive list of available options, see below.
+
+= Advanced .arcconfig =
+
+Other options include:
+
+  - **lint_engine**: the name of a subclass of @{class:ArcanistLintEngine}, 
+    which should be used to apply lint rules to this project. See (TODO).
+  - **unit_engine**: the name of a subclass of 
+    @{class:ArcanistBaseUnitTestEngine.php}, which should be used to apply unit
+    test rules to this project. See (TODO).
+  - **arcanist_configuration**: the name of a subclass of 
+    @{class:ArcanistConfiguration} which can add new command flags for this
+    project or provide entirely new commands.
+  - **remote_hooks_installed**: tells Arcanist that you've set up remote hooks
+    in the master repository (see @{article:Installing Arcanist SVN Hooks} for
+    SVN, or (TODO) for git).
+  - **copyright_holder**: used by @{class:ArcanistLicenseLinter} to apply
+    license notices to source files.
+  - **phutil_libraries**: map of additional Phutil libraries to load at startup.
diff --git a/src/workflow/svn-hook-pre-commit/ArcanistSvnHookPreCommitWorkflow.php b/src/workflow/svn-hook-pre-commit/ArcanistSvnHookPreCommitWorkflow.php
index 13d14289..23f85133 100644
--- a/src/workflow/svn-hook-pre-commit/ArcanistSvnHookPreCommitWorkflow.php
+++ b/src/workflow/svn-hook-pre-commit/ArcanistSvnHookPreCommitWorkflow.php
@@ -199,7 +199,12 @@ EOTEXT
     $engine->setFileData($data);
     $engine->setCommitHookMode(true);
 
-    $results = $engine->run();
+    try {
+      $results = $engine->run();
+    } catch (ArcanistNoEffectException $no_effect) {
+      // Nothing to do, bail out.
+      return 0;
+    }
 
     $renderer = new ArcanistLintRenderer();
     $failures = array();
@@ -226,6 +231,6 @@ EOTEXT
       return 1;
     }
 
-    return 99;
+    return 0;
   }
 }