improve agents external integration

todo.md

@@ -7,6 +7,8 @@
 [] test if home directory mcp.json works if mcp.json is specified in repo
 [] add footer to the working comment ("executed by {agent}", link to pullfrog (homepage) w/ small logo?, feedback (create github issue), link to workflow run)- see https://github.com/colinhacks/zod/issues/5459#issuecomment-3548382991
 [] avoid passing all of process.env into agents: minimum # of vars
+[] external.ts align to agents
+[] toon encode in prompt
 
 ## MAYBE
 
@@ -32,4 +34,5 @@
 [x] standardize mcp server
 [x] entry.js
 [x] split up prompts, load dynamically based on mode
-[x] log.txt to stdout
+[x] log.txt to stdout
+[x] rename mcp to use underscore