diff --git a/limacharlie/commands/case_cmd.py b/limacharlie/commands/case_cmd.py
index a806ecd..a24cd7e 100644
--- a/limacharlie/commands/case_cmd.py
+++ b/limacharlie/commands/case_cmd.py
@@ -72,7 +72,7 @@
 lifecycle including who made each change and when.
 
 Examples:
-  limacharlie case get --id 42
+  limacharlie case get --case-number 42
 """
 
 _EXPLAIN_UPDATE = """\
@@ -96,10 +96,10 @@
   closed -> in_progress (reopen)
 
 Examples:
-  limacharlie case update --id 42 --status in_progress
-  limacharlie case update --id 42 --severity high
-  limacharlie case update --id 42 --assignees alice@example.com
-  limacharlie case update --id 42 --status resolved \\
+  limacharlie case update --case-number 42 --status in_progress
+  limacharlie case update --case-number 42 --severity high
+  limacharlie case update --case-number 42 --assignees alice@example.com
+  limacharlie case update --case-number 42 --status resolved \\
       --classification true_positive \\
       --conclusion "Contained via network isolation"
 """
@@ -120,10 +120,10 @@
 Provide content via --content, --input-file, or stdin.
 
 Examples:
-  limacharlie case add-note --id 42 --content "Initial triage complete"
-  limacharlie case add-note --id 42 --type analysis \\
+  limacharlie case add-note --case-number 42 --content "Initial triage complete"
+  limacharlie case add-note --case-number 42 --type analysis \\
       --content "Confirmed C2 beacon to 10.0.0.1"
-  echo "Handoff notes" | limacharlie case add-note --id 42 --type handoff
+  echo "Handoff notes" | limacharlie case add-note --case-number 42 --type handoff
 """
 
 _EXPLAIN_BULK_UPDATE = """\
@@ -397,9 +397,9 @@
 are skipped.
 
 Examples:
-  limacharlie case export --id 42
-  limacharlie case export --id 42 --output json > case.json
-  limacharlie case export --id 42 --with-data ./case-export
+  limacharlie case export --case-number 42
+  limacharlie case export --case-number 42 --output json > case.json
+  limacharlie case export --case-number 42 --with-data ./case-export
 """
 
 _EXPLAIN_CREATE = """\
@@ -463,8 +463,8 @@
 replaced with the provided set.  Use --tag/-t for each tag value.
 
 Examples:
-  limacharlie case tag set --id 42 --tag phishing
-  limacharlie case tag set --id 42 -t phishing -t urgent
+  limacharlie case tag set --case-number 42 --tag phishing
+  limacharlie case tag set --case-number 42 -t phishing -t urgent
 """
 
 _EXPLAIN_TAG_ADD = """\
@@ -472,8 +472,8 @@
 Duplicate tags are automatically deduplicated.
 
 Examples:
-  limacharlie case tag add --id 42 --tag new-tag
-  limacharlie case tag add --id 42 -t phishing -t urgent
+  limacharlie case tag add --case-number 42 --tag new-tag
+  limacharlie case tag add --case-number 42 -t phishing -t urgent
 """
 
 _EXPLAIN_TAG_REMOVE = """\
@@ -481,8 +481,8 @@
 case are silently ignored.
 
 Examples:
-  limacharlie case tag remove --id 42 --tag old-tag
-  limacharlie case tag remove --id 42 -t phishing -t urgent
+  limacharlie case tag remove --case-number 42 --tag old-tag
+  limacharlie case tag remove --case-number 42 -t phishing -t urgent
 """
 
 register_explain("case.tag.set", _EXPLAIN_TAG_SET)
@@ -647,13 +647,13 @@ def list_cases(ctx, status, severity, classification, assignee, search,
 # ---------------------------------------------------------------------------
 
 @group.command()
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @pass_context
 def get(ctx, case_number) -> None:
     """Get a case with its event timeline.
 
     Example:
-        limacharlie case get --id 42
+        limacharlie case get --case-number 42
     """
     t = _get_cases(ctx)
     data = t.get_case(case_number)
@@ -665,7 +665,7 @@ def get(ctx, case_number) -> None:
 # ---------------------------------------------------------------------------
 
 @group.command()
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @click.option("--with-data", "output_dir", default=None, type=click.Path(),
               help="Export with full data to a directory.")
 @pass_context
@@ -678,8 +678,8 @@ def export(ctx, case_number, output_dir) -> None:
     artifact binaries.
 
     Examples:
-        limacharlie case export --id 42
-        limacharlie case export --id 42 --with-data ./out
+        limacharlie case export --case-number 42
+        limacharlie case export --case-number 42 --with-data ./out
     """
     t = _get_cases(ctx)
     data = t.export_case(case_number)
@@ -780,7 +780,7 @@ def _export_with_data(ctx: click.Context, t: Cases, data: dict[str, Any],
 # ---------------------------------------------------------------------------
 
 @group.command()
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @click.option("--status", default=None, type=_STATUS_CHOICES, help="New status.")
 @click.option("--severity", default=None, type=_SEVERITY_CHOICES, help="Case severity (critical, high, medium, low, info).")
 @click.option("--assignees", multiple=True, help="Assignee email (repeatable for multiple assignees).")
@@ -796,12 +796,12 @@ def update(ctx, case_number, status, severity, assignees, classification,
     Only provided fields are changed.
 
     Examples:
-        limacharlie case update --id 42 --status in_progress
-        limacharlie case update --id 42 --severity high
-        limacharlie case update --id 42 --assignees alice@example.com
-        limacharlie case update --id 42 --status resolved \\
+        limacharlie case update --case-number 42 --status in_progress
+        limacharlie case update --case-number 42 --severity high
+        limacharlie case update --case-number 42 --assignees alice@example.com
+        limacharlie case update --case-number 42 --status resolved \\
             --classification true_positive
-        limacharlie case update --id 42 --tag phishing --tag urgent
+        limacharlie case update --case-number 42 --tag phishing --tag urgent
     """
     fields = {
         "status": status,
@@ -829,7 +829,7 @@ def update(ctx, case_number, status, severity, assignees, classification,
 # ---------------------------------------------------------------------------
 
 @group.command("add-note")
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @click.option("--content", default=None, help="Note content.")
 @click.option("--input-file", default=None, type=click.Path(exists=True), help="Read note content from file.")
 @click.option("--type", "note_type", default=None, type=_NOTE_TYPE_CHOICES,
@@ -841,10 +841,10 @@ def add_note(ctx, case_number, content, input_file, note_type) -> None:
     Provide content via --content, --input-file, or stdin.
 
     Examples:
-        limacharlie case add-note --id 42 --content "Triage complete"
-        limacharlie case add-note --id 42 --type analysis \\
+        limacharlie case add-note --case-number 42 --content "Triage complete"
+        limacharlie case add-note --case-number 42 --type analysis \\
             --content "Confirmed C2 beacon"
-        echo "notes" | limacharlie case add-note --id 42
+        echo "notes" | limacharlie case add-note --case-number 42
     """
     if content:
         text = content
@@ -1423,15 +1423,15 @@ def tag_group() -> None:
 
 
 @tag_group.command("set")
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @click.option("--tag", "-t", "tags", multiple=True, required=True, help="Tag value (repeatable).")
 @pass_context
 def tag_set(ctx, case_number, tags) -> None:
     """Replace all tags on a case.
 
     Examples:
-        limacharlie case tag set --id 42 --tag phishing
-        limacharlie case tag set --id 42 -t phishing -t urgent
+        limacharlie case tag set --case-number 42 --tag phishing
+        limacharlie case tag set --case-number 42 -t phishing -t urgent
     """
     t = _get_cases(ctx)
     data = t.update_case(case_number, tags=list(tags))
@@ -1439,15 +1439,15 @@ def tag_set(ctx, case_number, tags) -> None:
 
 
 @tag_group.command("add")
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @click.option("--tag", "-t", "tags", multiple=True, required=True, help="Tag value to add (repeatable).")
 @pass_context
 def tag_add(ctx, case_number, tags) -> None:
     """Add tags to a case (merged with existing).
 
     Examples:
-        limacharlie case tag add --id 42 --tag new-tag
-        limacharlie case tag add --id 42 -t phishing -t urgent
+        limacharlie case tag add --case-number 42 --tag new-tag
+        limacharlie case tag add --case-number 42 -t phishing -t urgent
     """
     tk = _get_cases(ctx)
     current = tk.get_case(case_number)
@@ -1463,15 +1463,15 @@ def tag_add(ctx, case_number, tags) -> None:
 
 
 @tag_group.command("remove")
-@click.option("--id", "case_number", required=True, type=int, help="Case number.")
+@click.option("--case-number", "case_number", required=True, type=int, help="Case number.")
 @click.option("--tag", "-t", "tags", multiple=True, required=True, help="Tag value to remove (repeatable).")
 @pass_context
 def tag_remove(ctx, case_number, tags) -> None:
     """Remove tags from a case.
 
     Examples:
-        limacharlie case tag remove --id 42 --tag old-tag
-        limacharlie case tag remove --id 42 -t phishing -t urgent
+        limacharlie case tag remove --case-number 42 --tag old-tag
+        limacharlie case tag remove --case-number 42 -t phishing -t urgent
     """
     tk = _get_cases(ctx)
     current = tk.get_case(case_number)
diff --git a/limacharlie/sdk/cases.py b/limacharlie/sdk/cases.py
index 2cfd740..9487aa9 100644
--- a/limacharlie/sdk/cases.py
+++ b/limacharlie/sdk/cases.py
@@ -59,9 +59,11 @@ def create_case(
         """
         data: dict[str, Any] = {}
         if detection is not None:
-            # The extension schema declares detection as type "json",
-            # which the platform validates as a JSON string (not a dict).
-            data["detection"] = json.dumps(detection)
+            # Pass the detection dict directly — the gzdata encoding
+            # already JSON-serializes the full data dict, so json.dumps
+            # here would double-encode it into a string that the LC
+            # backend drops (schema type "json" expects an object).
+            data["detection"] = detection
         if severity is not None:
             data["severity"] = severity
         if summary is not None:
diff --git a/tests/unit/test_cli_case.py b/tests/unit/test_cli_case.py
index 8b67d8b..64aa14c 100644
--- a/tests/unit/test_cli_case.py
+++ b/tests/unit/test_cli_case.py
@@ -118,7 +118,7 @@ def test_create_with_detection(self):
                 ["case", "create", "--detection", self._SAMPLE_DETECTION,
                  "--summary", "Triage detection"],
                 mock_t_cls,
-                return_value={"created": 1, "case_id": "tid-new"},
+                return_value={"created": 1, "case_number": 1},
             )
             assert result.exit_code == 0
             mock_t.create_case.assert_called_once_with(
@@ -136,7 +136,7 @@ def test_create_with_severity_override(self):
                  "--severity", "critical",
                  "--summary", "Critical lateral movement"],
                 mock_t_cls,
-                return_value={"created": 1, "case_id": "tid-new"},
+                return_value={"created": 1, "case_number": 1},
             )
             assert result.exit_code == 0
             mock_t.create_case.assert_called_once_with(
@@ -151,7 +151,7 @@ def test_create_without_detection(self):
             result, mock_t = _invoke(
                 ["case", "create", "--summary", "Manual investigation"],
                 mock_t_cls,
-                return_value={"created": 1, "case_id": "tid-new"},
+                return_value={"created": 1, "case_number": 1},
             )
             assert result.exit_code == 0
             mock_t.create_case.assert_called_once_with(
@@ -167,7 +167,7 @@ def test_create_without_detection_with_severity(self):
                 ["case", "create", "--severity", "medium",
                  "--summary", "Medium severity case"],
                 mock_t_cls,
-                return_value={"created": 1, "case_id": "tid-new"},
+                return_value={"created": 1, "case_number": 1},
             )
             assert result.exit_code == 0
             mock_t.create_case.assert_called_once_with(
@@ -182,7 +182,7 @@ def test_create_with_summary(self):
             result, mock_t = _invoke(
                 ["case", "create", "--summary", "Lateral movement detected"],
                 mock_t_cls,
-                return_value={"created": 1, "case_id": "tid-new"},
+                return_value={"created": 1, "case_number": 1},
             )
             assert result.exit_code == 0
             mock_t.create_case.assert_called_once_with(
@@ -290,7 +290,7 @@ def test_get_by_id(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "get", "--id", "42"],
+                ["case", "get", "--case-number", "42"],
                 mock_t_cls,
                 return_value={"case": {"case_id": "tid-1"}, "events": []},
             )
@@ -321,7 +321,7 @@ def test_export_by_id(self):
                 "artifacts": {"artifacts": []},
             }
             result, mock_t = _invoke(
-                ["case", "export", "--id", "42"],
+                ["case", "export", "--case-number", "42"],
                 mock_t_cls,
                 return_value=export_data,
             )
@@ -365,7 +365,7 @@ def test_export_with_data_creates_directory(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--output", "json", "case", "export", "--id", "42",
+                cli, ["--output", "json", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0, result.output
@@ -415,7 +415,7 @@ def test_export_with_data_skips_on_fetch_error(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--output", "json", "case", "export", "--id", "42",
+                cli, ["--output", "json", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0
@@ -443,7 +443,7 @@ def test_export_with_data_quiet_mode(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--quiet", "case", "export", "--id", "42",
+                cli, ["--quiet", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0
@@ -483,7 +483,7 @@ def test_export_with_data_artifact_export_url(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--output", "json", "case", "export", "--id", "42",
+                cli, ["--output", "json", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0
@@ -514,7 +514,7 @@ def test_export_with_data_telemetry_fetch_error(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--output", "json", "case", "export", "--id", "42",
+                cli, ["--output", "json", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0
@@ -544,7 +544,7 @@ def test_export_with_data_artifact_fetch_error(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--output", "json", "case", "export", "--id", "42",
+                cli, ["--output", "json", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0
@@ -571,7 +571,7 @@ def test_export_with_data_skips_empty_ids(self, tmp_path):
 
             runner = CliRunner()
             result = runner.invoke(
-                cli, ["--output", "json", "case", "export", "--id", "42",
+                cli, ["--output", "json", "case", "export", "--case-number", "42",
                       "--with-data", out_dir],
             )
             assert result.exit_code == 0
@@ -589,7 +589,7 @@ def test_update_status(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "update", "--id", "42", "--status", "in_progress"],
+                ["case", "update", "--case-number", "42", "--status", "in_progress"],
                 mock_t_cls,
                 return_value={"case": {}},
             )
@@ -600,7 +600,7 @@ def test_update_multiple_fields(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "update", "--id", "42",
+                ["case", "update", "--case-number", "42",
                  "--status", "resolved",
                  "--classification", "true_positive",
                  "--assignees", "bob@example.com"],
@@ -619,7 +619,7 @@ def test_update_no_fields_error(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "update", "--id", "42"],
+                ["case", "update", "--case-number", "42"],
                 mock_t_cls,
             )
             assert result.exit_code != 0
@@ -627,7 +627,7 @@ def test_update_no_fields_error(self):
 
     def test_update_invalid_status_rejected(self):
         runner = CliRunner()
-        result = runner.invoke(cli, ["case", "update", "--id", "1", "--status", "invalid"])
+        result = runner.invoke(cli, ["case", "update", "--case-number", "1", "--status", "invalid"])
         assert result.exit_code != 0
 
 
@@ -641,7 +641,7 @@ def test_add_note_with_content(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "add-note", "--id", "42", "--content", "Triage complete"],
+                ["case", "add-note", "--case-number", "42", "--content", "Triage complete"],
                 mock_t_cls,
                 return_value={},
             )
@@ -652,7 +652,7 @@ def test_add_note_with_type(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "add-note", "--id", "42", "--content", "Analysis", "--type", "analysis"],
+                ["case", "add-note", "--case-number", "42", "--content", "Analysis", "--type", "analysis"],
                 mock_t_cls,
                 return_value={},
             )
@@ -668,7 +668,7 @@ def test_add_note_from_stdin(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "add-note", "--id", "42"],
+                ["--output", "json", "case", "add-note", "--case-number", "42"],
                 input="Piped content\n",
             )
             assert result.exit_code == 0
@@ -677,7 +677,7 @@ def test_add_note_from_stdin(self):
     def test_add_note_invalid_type_rejected(self):
         runner = CliRunner()
         result = runner.invoke(cli, [
-            "case", "add-note", "--id", "1", "--content", "x", "--type", "invalid",
+            "case", "add-note", "--case-number", "1", "--content", "x", "--type", "invalid",
         ])
         assert result.exit_code != 0
 
@@ -1349,7 +1349,7 @@ def test_update_with_tags(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "update", "--id", "1", "--tag", "phishing", "--tag", "urgent"],
+                ["case", "update", "--case-number", "1", "--tag", "phishing", "--tag", "urgent"],
                 mock_t_cls,
                 return_value={"case": {}},
             )
@@ -1362,7 +1362,7 @@ def test_update_with_tags_and_status(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "update", "--id", "1", "--status", "in_progress",
+                ["case", "update", "--case-number", "1", "--status", "in_progress",
                  "--tag", "phishing"],
                 mock_t_cls,
                 return_value={"case": {}},
@@ -1390,7 +1390,7 @@ def test_tag_set(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "tag", "set", "--id", "1", "--tag", "phishing"],
+                ["case", "tag", "set", "--case-number", "1", "--tag", "phishing"],
                 mock_t_cls,
                 return_value={"case": {}},
             )
@@ -1401,7 +1401,7 @@ def test_tag_set_multiple(self):
         p1, p2, p3 = _patch_cases()
         with p1, p2, p3 as mock_t_cls:
             result, mock_t = _invoke(
-                ["case", "tag", "set", "--id", "1", "-t", "phishing", "-t", "urgent"],
+                ["case", "tag", "set", "--case-number", "1", "-t", "phishing", "-t", "urgent"],
                 mock_t_cls,
                 return_value={"case": {}},
             )
@@ -1420,7 +1420,7 @@ def test_tag_add_merges_with_existing(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "add", "--id", "1", "--tag", "new-tag"],
+                ["--output", "json", "case", "tag", "add", "--case-number", "1", "--tag", "new-tag"],
             )
             assert result.exit_code == 0
             mock_t.get_case.assert_called_once_with(1)
@@ -1438,7 +1438,7 @@ def test_tag_add_deduplicates(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "add", "--id", "1", "--tag", "phishing"],
+                ["--output", "json", "case", "tag", "add", "--case-number", "1", "--tag", "phishing"],
             )
             assert result.exit_code == 0
             mock_t.update_case.assert_called_once_with(1, tags=["phishing"])
@@ -1455,7 +1455,7 @@ def test_tag_add_with_no_existing_tags(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "add", "--id", "1", "--tag", "new-tag"],
+                ["--output", "json", "case", "tag", "add", "--case-number", "1", "--tag", "new-tag"],
             )
             assert result.exit_code == 0
             mock_t.update_case.assert_called_once_with(1, tags=["new-tag"])
@@ -1472,7 +1472,7 @@ def test_tag_remove(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "remove", "--id", "1", "--tag", "old-tag"],
+                ["--output", "json", "case", "tag", "remove", "--case-number", "1", "--tag", "old-tag"],
             )
             assert result.exit_code == 0
             mock_t.get_case.assert_called_once_with(1)
@@ -1490,7 +1490,7 @@ def test_tag_remove_nonexistent_tag(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "remove", "--id", "1", "--tag", "no-such-tag"],
+                ["--output", "json", "case", "tag", "remove", "--case-number", "1", "--tag", "no-such-tag"],
             )
             assert result.exit_code == 0
             mock_t.update_case.assert_called_once_with(1, tags=["keep-tag"])
@@ -1508,7 +1508,7 @@ def test_tag_add_case_insensitive_dedup(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "add", "--id", "1", "--tag", "PHISHING"],
+                ["--output", "json", "case", "tag", "add", "--case-number", "1", "--tag", "PHISHING"],
             )
             assert result.exit_code == 0
             # The existing 'phishing' wins; no duplicate added.
@@ -1527,7 +1527,7 @@ def test_tag_remove_case_insensitive(self):
             runner = CliRunner()
             result = runner.invoke(
                 cli,
-                ["--output", "json", "case", "tag", "remove", "--id", "1", "--tag", "PHISHING"],
+                ["--output", "json", "case", "tag", "remove", "--case-number", "1", "--tag", "PHISHING"],
             )
             assert result.exit_code == 0
             mock_t.update_case.assert_called_once_with(1, tags=["keep-tag"])
@@ -1539,5 +1539,5 @@ def test_tag_set_requires_id(self):
 
     def test_tag_set_requires_tag(self):
         runner = CliRunner()
-        result = runner.invoke(cli, ["case", "tag", "set", "--id", "1"])
+        result = runner.invoke(cli, ["case", "tag", "set", "--case-number", "1"])
         assert result.exit_code != 0
diff --git a/tests/unit/test_sdk_cases.py b/tests/unit/test_sdk_cases.py
index b3571a3..01aa717 100644
--- a/tests/unit/test_sdk_cases.py
+++ b/tests/unit/test_sdk_cases.py
@@ -79,14 +79,14 @@ def test_calls_extension_request(self, cases, mock_org):
         with patch("limacharlie.sdk.cases.Extensions") as MockExt:
             mock_ext = MagicMock()
             MockExt.return_value = mock_ext
-            mock_ext.request.return_value = {"created": 1, "case_id": "tid-new"}
+            mock_ext.request.return_value = {"created": 1, "case_number": 1}
             result = cases.create_case(self._SAMPLE_DETECTION)
             MockExt.assert_called_once_with(mock_org)
             mock_ext.request.assert_called_once_with(
                 "ext-cases", "create_case",
-                data={"detection": json.dumps(self._SAMPLE_DETECTION)},
+                data={"detection": self._SAMPLE_DETECTION},
             )
-            assert result["case_id"] == "tid-new"
+            assert result["case_number"] == 1
 
     def test_all_optional_fields(self, cases, mock_org):
         with patch("limacharlie.sdk.cases.Extensions") as MockExt:
@@ -100,7 +100,7 @@ def test_all_optional_fields(self, cases, mock_org):
             )
             call_data = mock_ext.request.call_args[1]["data"]
             assert call_data == {
-                "detection": json.dumps(self._SAMPLE_DETECTION),
+                "detection": self._SAMPLE_DETECTION,
                 "severity": "high",
                 "summary": "Test summary",
             }
@@ -144,7 +144,7 @@ def test_with_summary(self, cases, mock_org):
             )
             call_data = mock_ext.request.call_args[1]["data"]
             assert call_data == {
-                "detection": json.dumps(self._SAMPLE_DETECTION),
+                "detection": self._SAMPLE_DETECTION,
                 "severity": "high",
                 "summary": "Lateral movement detected",
             }