story-kit: create 65_story_standardised_script_test_entry_point_for_all_projects

.story_kit/work/1_upcoming/65_story_standardised_script_test_entry_point_for_all_projects.md

@@ -14,9 +14,11 @@ As a Story Kit user, I want every project initialised by Story Kit to have a scr
 - [ ] Story Kit project scaffolding creates a script/ directory in the project root
 - [ ] A script/test executable is created during init with a sensible default (e.g. exit 0 or echo no tests configured)
 - [ ] The Rust server can invoke script/test as the canonical way to run all tests for any project
-- [ ] Agents use script/test instead of guessing test commands
+- [ ] Agents use script/test instead of guessing test commands — they only need to check output if exit code is non-zero, saving LLM tokens
+- [ ] script/test exits 0 on success, non-zero on failure — agents treat it as a single pass/fail gate without parsing output on success
 - [ ] For this project (story-kit-app), script/test runs cargo test, pnpm test, and pnpm test:e2e
 
 ## Out of Scope
 
-- TBD
+- Other script/ entry points (script/setup, script/lint, etc) — future stories
+- Changing how individual test frameworks work