test: add failing tests for cost extraction wrong index (#555) (#556)

* fix: extract cost/model from correct tuple index per operation (#555)

The sync loop read result[1] as cost for all operations, but each
returns a different tuple format. generate's result[1] is a bool
(was_incremental) which passed isinstance(bool, (int, float)) and
was counted as $1.00; crash/fix/verify have cost at index 4, not 1,
so their costs were always $0.00. Two helpers now dispatch on the
operation name to read the correct index.

Fixes #555

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: apply cost extraction fix to operation_log.py and add passing tests (#555)

- operation_log.py: use _extract_cost_from_result/_extract_model_from_result helpers
  instead of hardcoded result[1]/result[2] (same bug as sync_orchestration.py)
- Update test files to import and test the actual fixed helpers (29/29 pass)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: Serhan-Asad

pdd/operation_log.py

@@ -336,8 +336,9 @@ def wrapper(*args: Any, **kwargs: Any) -> Any:
                 model = "unknown"
                 if success and result:
                     if isinstance(result, tuple) and len(result) >= 3:
-                        if isinstance(result[1], (int, float)): cost = float(result[1])
-                        if isinstance(result[2], str): model = str(result[2])
+                        from .sync_orchestration import _extract_cost_from_result, _extract_model_from_result
+                        cost = _extract_cost_from_result(operation, result)
+                        model = _extract_model_from_result(operation, result)
 
                 update_log_entry(entry, success=success, cost=cost, model=model, duration=duration, error=error_msg)
                 if basename and language:

pdd/sync_orchestration.py

@@ -70,6 +70,46 @@
 # Note: _safe_basename is imported from sync_determine_operation
 
 
+def _extract_cost_from_result(operation: str, result: tuple) -> float:
+    """Extract cost from an operation result tuple at the correct index.
+
+    Each operation returns a different tuple format:
+    - crash/fix/verify: 6-tuple (..., cost, model) — cost at index 4
+    - generate: 4-tuple (content, was_incremental, cost, model) — cost at index 2
+    - example/test/test_extend/auto-deps: 3-or-4-tuple (..., cost, model, ...) — cost at index 1
+    """
+    if operation in ('crash', 'fix', 'verify'):
+        idx = 4
+    elif operation == 'generate':
+        idx = 2
+    else:
+        idx = 1
+    if len(result) > idx:
+        val = result[idx]
+        if isinstance(val, (int, float)) and not isinstance(val, bool):
+            return float(val)
+    return 0.0
+
+
+def _extract_model_from_result(operation: str, result: tuple) -> str:
+    """Extract model name from an operation result tuple at the correct index.
+
+    Each operation returns a different tuple format:
+    - crash/fix/verify: 6-tuple (..., cost, model) — model at index 5
+    - generate: 4-tuple (content, was_incremental, cost, model) — model at index 3
+    - example/test/test_extend/auto-deps: 3-or-4-tuple (..., cost, model, ...) — model at index 2
+    """
+    if operation in ('crash', 'fix', 'verify'):
+        idx = 5
+    elif operation == 'generate':
+        idx = 3
+    else:
+        idx = 2
+    if len(result) > idx and isinstance(result[idx], str):
+        return result[idx]
+    return 'unknown'
+
+
 def _use_agentic_path(language: str, agentic_mode: bool) -> bool:
     """Returns True if we should use agentic path (non-Python OR agentic_mode for Python).
 
@@ -1854,8 +1894,7 @@ def __init__(self, rc, out, err):
                                         success = pdd_files['test'].exists()
                                 else:
                                     success = bool(result[0])
-                                # Cost is always at index 1 in both 3-tuple and 4-tuple returns
-                                cost = result[1] if len(result) >= 2 and isinstance(result[1], (int, float)) else 0.0
+                                cost = _extract_cost_from_result(operation, result)
                                 current_cost_ref[0] += cost
                             else:
                                 success = result is not None
@@ -1877,17 +1916,8 @@ def __init__(self, rc, out, err):
                                  actual_cost = result.get('cost', 0.0)
                                  model_name = result.get('model', 'unknown')
                             elif isinstance(result, tuple) and len(result) >= 3:
-                                 # cmd_test_main returns 4-tuple: (content, cost, model, agentic_success)
-                                 # Other commands may return either:
-                                 #   - 3-tuple: (content, cost, model), e.g. some context operations
-                                 #   - 4-tuple: (content, was_incremental, cost, model_name), e.g. code_generator_main
-                                 # For tests, cost is at index 1; for most other 4+ tuples, cost is at index -2 and model at -1.
-                                 if operation in ('test', 'test_extend') and len(result) >= 4:
-                                     actual_cost = result[1] if isinstance(result[1], (int, float)) else 0.0
-                                     model_name = result[2] if isinstance(result[2], str) else 'unknown'
-                                 else:
-                                     actual_cost = result[1] if isinstance(result[1], (int, float)) else 0.0
-                                     model_name = result[2] if len(result) >= 3 and isinstance(result[2], str) else 'unknown'
+                                 actual_cost = _extract_cost_from_result(operation, result)
+                                 model_name = _extract_model_from_result(operation, result)
                             last_model_name = str(model_name)
                             operations_completed.append(operation)
                             _save_fingerprint_atomic(basename, language, operation, pdd_files, actual_cost, str(model_name), atomic_state=atomic_state)