fix(claude-code): replace /cost content in the /goal node (#10527)

The node with ID vw9cc6_33nHnNPNyhLo_d was renamed from /cost to /goal
but kept the /cost description, so goal@... held /cost text and a stale
cost@... file shared the same ID. Write the /goal description and remove
the stale cost file.

Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>

roadmaps/claude-code/content/cost@vw9cc6_33nHnNPNyhLo_d.md

@@ -1,8 +0,0 @@
-# /cost
-
-The `/cost` command is a financial monitoring tool that provides a real-time snapshot of the monetary expenses and token usage for your active session. While the `/usage` command focuses on how much of your context window is occupied, /cost translates that activity into USD amounts, showing you exactly how much your current conversation has cost based on your API pricing tier.
-
-Visit the following resources to learn more:
-
-- [@official@Built-in commands](https://code.claude.com/docs/en/interactive-mode)
-- [@official@Using the /cost command](https://code.claude.com/docs/en/costs)

roadmaps/claude-code/content/goal@vw9cc6_33nHnNPNyhLo_d.md

@@ -1,8 +1,8 @@
-# /cost
+# /goal
 
-The `/cost` command is a financial monitoring tool that provides a real-time snapshot of the monetary expenses and token usage for your active session. While the `/usage` command focuses on how much of your context window is occupied, /cost translates that activity into USD amounts, showing you exactly how much your current conversation has cost based on your API pricing tier.
+`/goal` sets a completion condition, and Claude keeps working turn after turn until the condition is met, without you prompting each step. After every turn a small model reads the conversation and decides whether the goal is met, not yet met or impossible. Run `/goal` with no argument to see the status, and `/goal clear` to remove an active goal. Write the condition as something Claude's own output can prove, like "`npm test` exits 0", and add a turn limit if you want to bound the run.
 
 Visit the following resources to learn more:
 
-- [@official@Built-in commands](https://code.claude.com/docs/en/interactive-mode)
-- [@official@Using the /cost command](https://code.claude.com/docs/en/costs)
+- [@official@Keep Claude working toward a goal](https://code.claude.com/docs/en/goal)
+- [@official@Prompt-based hooks](https://code.claude.com/docs/en/hooks-guide#prompt-based-hooks)