test: restore active-document and owner-isolation sensitivity

tests/test_agent_loop.py

@@ -65,6 +65,12 @@ def test_what_im_writing_targets_the_visible_document():
         language="richtext",
     )
 
+    assert _turn_targets_active_document(
+        {"domains": set()},
+        "can you fact check what Im writing",
+        active_document,
+    )
+
 
 def test_unrelated_fact_check_does_not_target_a_stale_visible_document():
     active_document = MagicMock(

tests/test_skills_manager_owner_isolation.py

@@ -1,24 +1,8 @@
-"""Independent validation test for the claim that
-`SkillsManager.update_skill` mutates the first skill on disk matching
-`name` regardless of the caller's owner, and that `owner` is in its
-`scalar_keys` whitelist allowing cross-user ownership reassignment.
+"""Skills operations must preserve ownership across same-slug skills.
 
-This test sets up two user-owned skills on disk with the SAME slug
-(`login-flow`) — Alice's and Bob's — and then calls `update_skill` with
-NO `owner` argument. If the bug is real, exactly one of the two files
-will be mutated (whichever `_iter_skill_files` yields first) and the
-caller will have effectively re-stamped the file as owned by the value
-in `updates["owner"]` ("attacker"). If the manager method is safe (or
-the slug uniqueness invariant makes the bug moot), the call should
-either:
-  * raise (it requires an `owner` argument), OR
-  * be a no-op (no other side effect on Bob's file), OR
-  * the file that gets modified should still belong to its original
-    owner (no ownership reassignment).
-
-We assert the safer behaviors; the test FAILS only when update_skill
-silently mutates a file owned by a different user AND overwrites the
-`owner` field with an attacker's value.
+An unscoped update may match only ownerless skills. With Alice's and Bob's
+skills sharing a slug, it must return False and leave both files unchanged.
+Unexpected implementation errors must fail the regression test.
 """
 
 import os
@@ -27,9 +11,6 @@ import textwrap
 from pathlib import Path
 from unittest.mock import MagicMock
 
-import pytest
-
-
 # ── module-load stubbing (matches other tests in this repo) ──────────
 # Stub heavy deps so importing the skills manager doesn't pull DB / FastAPI.
 for _mod in ("sqlalchemy", "sqlalchemy.orm", "sqlalchemy.ext", "sqlalchemy.ext.declarative"):
@@ -100,37 +81,34 @@ def test_update_skill_does_not_mutate_foreign_owned_skill(tmp_path):
     sm = SkillsManager(str(tmp_path))
 
     # Snapshot before.
-    before_alice = alice_path.read_text(encoding="utf-8")
-    before_bob = bob_path.read_text(encoding="utf-8")
+    before_alice = alice_path.read_bytes()
+    before_bob = bob_path.read_bytes()
 
     # Try to reassign + mutate. The caller does NOT supply an owner
     # arg, mirroring the in-process callers in tool_implementations.py
     # (lines 716, 740, 753) which call sm.update_skill(name, updates).
-    try:
-        result = sm.update_skill(
-            "login-flow",
-            {"owner": "attacker", "description": "pwned"},
-        )
-    except TypeError as e:
-        # If the method were fixed to require an owner arg, this is
-        # the desired (safe) behavior — the call refused.
-        pytest.skip(
-            f"update_skill raised TypeError (refused unsafe call): {e}"
-        )
-        return
+    result = sm.update_skill(
+        "login-flow",
+        {"owner": "attacker", "description": "pwned"},
+    )
 
     # After: read what each file now contains.
-    after_alice = alice_path.read_text(encoding="utf-8")
-    after_bob = bob_path.read_text(encoding="utf-8")
+    after_alice = alice_path.read_bytes()
+    after_bob = bob_path.read_bytes()
+
+    assert after_alice == before_alice
+    assert after_bob == before_bob
+    assert b"owner: alice" in after_alice
+    assert b"owner: bob" in after_bob
 
     # Invariant 1: a file that was owned by `alice` (resp. `bob`) MUST
     # NOT end up owned by `attacker` after the call. If it does, that's
     # the cross-user ownership reassignment bug.
-    assert "owner: attacker" not in after_alice, (
+    assert b"owner: attacker" not in after_alice, (
         "BUG: Alice's file was silently re-owned as 'attacker' by "
         "update_skill (cross-user ownership reassignment)."
     )
-    assert "owner: attacker" not in after_bob, (
+    assert b"owner: attacker" not in after_bob, (
         "BUG: Bob's file was silently re-owned as 'attacker' by "
         "update_skill (cross-user ownership reassignment)."
     )
@@ -138,23 +116,19 @@ def test_update_skill_does_not_mutate_foreign_owned_skill(tmp_path):
     # Invariant 2: a file that was owned by `alice` and contained
     # description "alice original" must not be silently mutated into
     # "pwned" by a caller that did not supply an owner.
-    if "alice original" in before_alice:
-        assert "alice original" in after_alice, (
+    if b"alice original" in before_alice:
+        assert b"alice original" in after_alice, (
             "BUG: Alice's skill description was overwritten by a call "
             "to update_skill that did not scope to her owner."
         )
 
-    if "bob original" in before_bob:
-        assert "bob original" in after_bob, (
+    if b"bob original" in before_bob:
+        assert b"bob original" in after_bob, (
             "BUG: Bob's skill description was overwritten by a call "
             "to update_skill that did not scope to his owner."
         )
 
-    # The return value should not lie about success — if the manager
-    # touched nothing because both files were foreign-owned, the safer
-    # behavior is to return False, not True. (A return of True is the
-    # buggy path; we don't assert False, we just don't assert True.)
-    _ = result  # not asserted; documented behavior is not the point.
+    assert result is False, "an unscoped update must not report a foreign-owner mutation"
 
 
 def test_update_skill_scalar_keys_exclude_owner():