docs: add a new goose tip (block#4940)

Signed-off-by: Better-Boy <[email protected]>

Author: Better-Boy

documentation/docs/guides/tips.md

@@ -46,3 +46,6 @@ You don’t need to get it right the first time. Iterating on prompts and tools
 
 ### Keep Goose updated
 Regularly [update](/docs/guides/updating-goose) Goose to benefit from the latest features, bug fixes, and performance improvements.
+
+### Keep Recipes Idempotent
+Write "[recipe](/docs/guides/recipes/session-recipes)" so they can run multiple times without causing unintended side effects. This ensures safer re-runs and easier debugging in automated workflows.