Artifact: Context Scoped to One Subsystem for a Multi-File Feature

A multi-file feature change scoped to only the notifications subsystem's files, with every diff confirmed inside that declared scope -- exercises co-04, co-10.

Scoped context (declared before the session starts):
  src/notifications/**
  tests/notifications/**
(everything else in the repo -- src/orders/, src/auth/, src/billing/, docs/,
etc. -- is deliberately excluded from this session's context, per co-04.)
 
Session tool-call log:
1. read_file(path="src/notifications/dispatcher.py")
2. read_file(path="src/notifications/templates/order_shipped.txt")
3. read_file(path="tests/notifications/test_dispatcher.py")
4. edit_file(path="src/notifications/dispatcher.py", diff="+  add SMS channel")
5. edit_file(path="src/notifications/templates/order_shipped_sms.txt", diff="+  new template")
6. edit_file(path="tests/notifications/test_dispatcher.py", diff="+  def test_sms_channel(): ...")
7. run_shell(command="pytest tests/notifications/ -q") -> "6 passed"
 
Diffs touched, full list:
  src/notifications/dispatcher.py
  src/notifications/templates/order_shipped_sms.txt
  tests/notifications/test_dispatcher.py

All three edited files fall inside src/notifications/** or tests/notifications/** -- the two globs declared as this session's scope. No file under src/orders/, src/auth/, or src/billing/ was ever read or written, even though the feature (adding an SMS channel) could plausibly have tempted the agent to also touch src/orders/ for order-status triggers -- keeping that out of context kept the diff to exactly the subsystem it needed to change.

Verify: every entry in the "diffs touched" list is a path under src/notifications/ or tests/notifications/ -- the declared scope -- and no diff anywhere in the log falls outside it -- satisfying ex-45's rule that the agent's diffs touch no file outside the scoped set.

Last updated July 17, 2026

Artifact: Context Scoped to One Subsystem for a Multi-File Feature

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