Show executed Lua in subagent progress boards

Render subagents.lua source in both collapsed and expanded progress views so
inspection-only calls remain understandable and survive session replay.

1 files changed, 33 insertions, 0 deletions

diff --git a/spec/test_progress.lua b/spec/test_progress.lua
index c8bf684..3c1ea33 100644
--- a/spec/test_progress.lua
+++ b/spec/test_progress.lua
@@ -295,6 +295,39 @@ return {
         progress.reset()
     end },
 
+    { "subagents.lua boards always show the executed source with real newlines", function()
+        if not pcall(require, "dkjson") then return "skip", "dkjson is not installed" end
+        progress.reset()
+        local source = "local w = subagents.workflows[\"workflow-1\"]\n\tif w then\n\t\treturn w.status\n\tend\nreturn \"gone\""
+        local component
+        progress.claim({
+            id = "call-source",
+            tool_name = "subagents.lua",
+            collapsed = true,
+            input = require("dkjson").encode({ source = source }),
+            set_component = function(_, value)
+                component = value
+                return { invalidate = function() end, alive = function() return true end }
+            end,
+        })
+        progress.bind({ tool_call_id = "call-source" })
+
+        -- An inspection call starts no children, so the source is the only
+        -- thing this entry can show.
+        local collapsed = component:render(100)
+        assert(collapsed[2]:find("subagents.lua", 1, true), plain(collapsed))
+        assert(collapsed[3] == "    local w = subagents.workflows[\"workflow-1\"]", collapsed[3])
+        assert(collapsed[4] == "      if w then", collapsed[4])
+        assert(collapsed[#collapsed] == "    \226\128\166", "collapsed source is capped")
+        assert(#collapsed == 2 + 4 + 1, plain(collapsed))
+
+        progress.collapse({ collapsed = false })
+        local expanded = plain(component:render(100))
+        assert(expanded:find("return \"gone\"", 1, true), expanded)
+        assert(not expanded:find("\\n", 1, true), "newlines must render as newlines")
+        progress.reset()
+    end },
+
     { "expanded history includes streamed assistant text and available tool call fields", function()
         progress.reset()
         local component = board("call-tools", false)