diff --git a/core/language/en-GB/Help/echo.tid b/core/language/en-GB/Help/echo.tid
new file mode 100644
index 000000000..5e8ac35ac
--- /dev/null
+++ b/core/language/en-GB/Help/echo.tid
@@ -0,0 +1,8 @@
+title: $:/language/Help/echo
+description: Displays all the passed arguments
+
+Displays all the passed arguments to a command. Useful for debugging.
+
+```
+--echo <text> *
+```
diff --git a/core/modules/commander.js b/core/modules/commander.js
index ce7d17087..f99fe70f1 100644
--- a/core/modules/commander.js
+++ b/core/modules/commander.js
@@ -136,7 +136,7 @@ Commander.prototype.stringifyToken = function(index,callback) {
 			switch(token.type) {
 				case "filter":
 					return callback(null,this.wiki.filterTiddlers(token.text)[0] || "");
-				case "wikified":
+				case "wikify":
 					return callback(null,this.wiki.renderText("text/plain","text/vnd.tiddlywiki",token.text,{
 						parseAsInline: false,
 						parentWidget: $tw.rootWidget
diff --git a/editions/tw5.com/tiddlers/commands/EchoCommand.tid b/editions/tw5.com/tiddlers/commands/EchoCommand.tid
new file mode 100644
index 000000000..81ea698ba
--- /dev/null
+++ b/editions/tw5.com/tiddlers/commands/EchoCommand.tid
@@ -0,0 +1,8 @@
+caption: echo
+created: 20241019150907690
+modified: 20241019150907690
+tags: Commands
+title: EchoCommand
+type: text/vnd.tiddlywiki
+
+{{$:/language/Help/echo}}
diff --git a/editions/tw5.com/tiddlers/nodejs/tiddlywiki.info_Files.tid b/editions/tw5.com/tiddlers/nodejs/tiddlywiki.info_Files.tid
index dddcd3106..fee95b89d 100644
--- a/editions/tw5.com/tiddlers/nodejs/tiddlywiki.info_Files.tid
+++ b/editions/tw5.com/tiddlers/nodejs/tiddlywiki.info_Files.tid
@@ -1,17 +1,17 @@
 created: 20161015114042793
-modified: 20211114101249016
+modified: 20241019145819938
 tags: TiddlyWikiFolders [[TiddlyWiki on Node.js]]
 title: tiddlywiki.info Files
 type: text/vnd.tiddlywiki
 
 [[TiddlyWikiFolders]] are configured with a single `tiddlywiki.info` file in the root of the wiki folder. It should contain a JSON object comprising the following properties:
 
-* ''plugins'' - an array of plugin names to be included in the wiki
-* ''themes'' - an array of theme names to be included in the wiki
-* ''languages'' - an array of language names to be included in the wiki
-* ''includeWikis'' - an array of references to external wiki folders to be included in the wiki
-* ''build'' - a hashmap of named build targets, each defined by an array of command tokens (see BuildCommand)
-* ''config'' - an optional hashmap of configuration options (see below)
+* ''plugins'' - optional array of plugin names to be included in the wiki
+* ''themes'' - optional array of theme names to be included in the wiki
+* ''languages'' - optional array of language names to be included in the wiki
+* ''includeWikis'' - optional array of references to external wiki folders to be included in the wiki
+* ''build'' - optional hashmap of named build targets, each defined by an array of command tokens (see BuildCommand)
+* ''config'' - optional hashmap of configuration options (see below)
 
 !!! ''includeWikis''
 
@@ -22,8 +22,45 @@ The entries in the ''includeWikis'' array can be either a string specifying the
 
 !!! ''build''
 
+The ''build'' property contains a hashmap of named build targets. Each of the build targets is defined as an array of command tokens.
+
 Note that the build targets of included wikis are merged if a target of that name isn't defined in the current `tiddlywiki.info` file.
 
+Command tokens can be a simple string or a command token object with a ''type'' property. The following types are defined to allow the command token to be dynamically defined:
+
+* ''filter'': the value of the first result of a filter expression specified in the ''text'' property of the command token object
+* ''wikify'': the result of wikifying a text string specified in the ''text'' property of the command token object
+* ''prompt'': the result of prompting the user for a string. The ''prompt'' property of the command token object specifies the textual prompt to be used. The optional ''default'' property specifies a string value to be used if the user presses enter in response to the prompt
+
+The EchoCommand is useful for debugging complex dynamic command tokens.
+
+For example:
+
+```
+"build": {
+	"dynamic": [
+		"--echo","testing",
+		"the following argument is wikified",
+		{
+			"type": "wikify",
+			"text": "<<version>>-prod.html"
+		},
+		"the following argument is a filter result",
+		{
+			"type": "filter",
+			"text": "[<version>!match[5.3.6-prerelease]then[text/html]else[text/plain]]"
+		},
+		"the following argument was provided by the user",
+		{
+			"type": "prompt",
+			"prompt": "Please enter some text and type enter",
+			"default": "Nothing"
+		}
+	],
+...
+```
+
+
 !!! ''config''
 
 Configuration options include:
diff --git a/editions/tw5.com/tiddlywiki.info b/editions/tw5.com/tiddlywiki.info
index f63c440a1..f7a2b336e 100644
--- a/editions/tw5.com/tiddlywiki.info
+++ b/editions/tw5.com/tiddlywiki.info
@@ -26,7 +26,7 @@
 		"dynamic": [
 			"--echo","testing",
 			{
-				"type": "wikified",
+				"type": "wikify",
 				"text": "<<version>>-prod.html"
 			},
 			"thingy",