@@ -103,10 +103,12 @@ var (
 	workspaceID  atomic.Int64
 )
 
-// nextTreenodeID starts above common version numbers and counts, which scripts
-// can otherwise mask when registering literal ID replacements.
+// nextTreenodeID returns 16-digit ids, like real workspace object ids. Scripts register them as
+// literal replacements, which apply before the harness's patterns; a short id would also match
+// inside other numbers in the output (timestamps, UUIDs, ports) and cut them up. A 16-digit id
+// starting with 4 practically never occurs inside those, and never looks like a timestamp.
 func nextTreenodeID() int64 {
-	return 1000 + workspaceID.Add(1)
+	return 4_000_000_000_000_000 + workspaceID.Add(1)
 }
 
 // IDs are prefixed with 7 and padded to avoid matching regex 1[78]\d{14}
Original file line number	Diff line number	Diff line change
`@@ -103,10 +103,12 @@ var (`
`103`	`103`	`workspaceID atomic.Int64`
`104`	`104`	`)`
`105`	`105`
`106`		`-// nextTreenodeID starts above common version numbers and counts, which scripts`
`107`		`-// can otherwise mask when registering literal ID replacements.`
	`106`	`+// nextTreenodeID returns 16-digit ids, like real workspace object ids. Scripts register them as`
	`107`	`+// literal replacements, which apply before the harness's patterns; a short id would also match`
	`108`	`+// inside other numbers in the output (timestamps, UUIDs, ports) and cut them up. A 16-digit id`
	`109`	`+// starting with 4 practically never occurs inside those, and never looks like a timestamp.`
`108`	`110`	`func nextTreenodeID() int64 {`
`109`		`- return 1000 + workspaceID.Add(1)`
	`111`	`+ return 4_000_000_000_000_000 + workspaceID.Add(1)`
`110`	`112`	`}`
`111`	`113`
`112`	`114`	`// IDs are prefixed with 7 and padded to avoid matching regex 1[78]\d{14}`