simpler ID generation to remove denormalization

llama_stack/core/id_generation.py

@@ -0,0 +1,44 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+from __future__ import annotations
+
+from collections.abc import Callable
+
+IdFactory = Callable[[], str]
+IdOverride = Callable[[str, IdFactory], str]
+
+_id_override: IdOverride | None = None
+
+
+def generate_object_id(kind: str, factory: IdFactory) -> str:
+    """Generate an identifier for the given kind using the provided factory.
+
+    Allows tests to override ID generation deterministically by installing an
+    override callback via :func:`set_id_override`.
+    """
+
+    override = _id_override
+    if override is not None:
+        return override(kind, factory)
+    return factory()
+
+
+def set_id_override(override: IdOverride) -> IdOverride | None:
+    """Install an override used to generate deterministic identifiers."""
+
+    global _id_override
+
+    previous = _id_override
+    _id_override = override
+    return previous
+
+
+def reset_id_override(token: IdOverride | None) -> None:
+    """Restore the previous override returned by :func:`set_id_override`."""
+
+    global _id_override
+    _id_override = token

llama_stack/providers/inline/files/localfs/files.py

@@ -22,6 +22,7 @@ from llama_stack.apis.files import (
     OpenAIFilePurpose,
 )
 from llama_stack.core.datatypes import AccessRule
+from llama_stack.core.id_generation import generate_object_id
 from llama_stack.log import get_logger
 from llama_stack.providers.utils.files.form_data import parse_expires_after
 from llama_stack.providers.utils.sqlstore.api import ColumnDefinition, ColumnType
@@ -65,7 +66,7 @@ class LocalfsFilesImpl(Files):
 
     def _generate_file_id(self) -> str:
         """Generate a unique file ID for OpenAI API."""
-        return f"file-{uuid.uuid4().hex}"
+        return generate_object_id("file", lambda: f"file-{uuid.uuid4().hex}")
 
     def _get_file_path(self, file_id: str) -> Path:
         """Get the filesystem path for a file ID."""

llama_stack/providers/remote/files/s3/files.py

@@ -23,6 +23,7 @@ from llama_stack.apis.files import (
     OpenAIFilePurpose,
 )
 from llama_stack.core.datatypes import AccessRule
+from llama_stack.core.id_generation import generate_object_id
 from llama_stack.providers.utils.files.form_data import parse_expires_after
 from llama_stack.providers.utils.sqlstore.api import ColumnDefinition, ColumnType
 from llama_stack.providers.utils.sqlstore.authorized_sqlstore import AuthorizedSqlStore
@@ -198,7 +199,7 @@ class S3FilesImpl(Files):
         purpose: Annotated[OpenAIFilePurpose, Form()],
         expires_after: Annotated[ExpiresAfter | None, Depends(parse_expires_after)] = None,
     ) -> OpenAIFileObject:
-        file_id = f"file-{uuid.uuid4().hex}"
+        file_id = generate_object_id("file", lambda: f"file-{uuid.uuid4().hex}")
 
         filename = getattr(file, "filename", None) or "uploaded_file"
 

llama_stack/providers/utils/memory/openai_vector_store_mixin.py

@@ -40,6 +40,7 @@ from llama_stack.apis.vector_io import (
     VectorStoreSearchResponse,
     VectorStoreSearchResponsePage,
 )
+from llama_stack.core.id_generation import generate_object_id
 from llama_stack.log import get_logger
 from llama_stack.providers.utils.kvstore.api import KVStore
 from llama_stack.providers.utils.memory.vector_store import (
@@ -352,7 +353,7 @@ class OpenAIVectorStoreMixin(ABC):
         """Creates a vector store."""
         created_at = int(time.time())
         # Derive the canonical vector_db_id (allow override, else generate)
-        vector_db_id = provider_vector_db_id or f"vs_{uuid.uuid4()}"
+        vector_db_id = provider_vector_db_id or generate_object_id("vector_store", lambda: f"vs_{uuid.uuid4()}")
 
         if provider_id is None:
             raise ValueError("Provider ID is required")
@@ -986,7 +987,7 @@ class OpenAIVectorStoreMixin(ABC):
         chunking_strategy = chunking_strategy or VectorStoreChunkingStrategyAuto()
 
         created_at = int(time.time())
-        batch_id = f"batch_{uuid.uuid4()}"
+        batch_id = generate_object_id("vector_store_file_batch", lambda: f"batch_{uuid.uuid4()}")
         # File batches expire after 7 days
         expires_at = created_at + (7 * 24 * 60 * 60)
 

llama_stack/testing/api_recorder.py

@@ -10,7 +10,7 @@ import hashlib
 import json
 import os
 import re
-from collections.abc import Generator
+from collections.abc import Callable, Generator
 from contextlib import contextmanager
 from enum import StrEnum
 from pathlib import Path
@@ -18,6 +18,7 @@ from typing import Any, Literal, cast
 
 from openai import NOT_GIVEN, OpenAI
 
+from llama_stack.core.id_generation import reset_id_override, set_id_override
 from llama_stack.log import get_logger
 
 logger = get_logger(__name__, category="testing")
@@ -30,9 +31,8 @@ _current_mode: str | None = None
 _current_storage: ResponseStorage | None = None
 _original_methods: dict[str, Any] = {}
 
-# ID normalization state: maps test_id -> (id_type -> {original_id: normalized_id})
+# Per-test deterministic ID counters (test_id -> id_kind -> counter)
-_id_normalizers: dict[str, dict[str, dict[str, str]]] = {}
+_id_counters: dict[str, dict[str, int]] = {}
-_id_counters: dict[str, dict[str, int]] = {}  # test_id -> (id_type -> counter)
 
 # Test context uses ContextVar since it changes per-test and needs async isolation
 from contextvars import ContextVar
@@ -56,104 +56,82 @@ class APIRecordingMode(StrEnum):
     RECORD_IF_MISSING = "record-if-missing"
 
 
-def _get_normalized_id(original_id: str, id_type: str) -> str:
+_ID_KIND_PREFIXES: dict[str, str] = {
-    """Get a normalized ID using a test-specific counter.
+    "file": "file-",
+    "vector_store": "vs_",
+    "vector_store_file_batch": "batch_",
+}
 
-    Each unique ID within a test gets assigned a sequential number (file-1, file-2, uuid-1, etc).
+
-    This ensures consistency across requests within the same test while keeping IDs human-readable.
+def _allocate_test_scoped_id(kind: str) -> str | None:
-    """
+    """Return the next deterministic ID for the given kind within the current test."""
-    global _id_normalizers, _id_counters
+
+    global _id_counters
 
     test_id = _test_context.get()
-    if not test_id:
+    prefix = _ID_KIND_PREFIXES.get(kind)
-        # No test context, return original ID
-        return original_id
 
-    # Initialize structures for this test if needed
+    if prefix is None:
-    if test_id not in _id_normalizers:
+        return None
-        _id_normalizers[test_id] = {}
-        _id_counters[test_id] = {}
 
-    if id_type not in _id_normalizers[test_id]:
+    key = test_id or "__global__"
-        _id_normalizers[test_id][id_type] = {}
-        _id_counters[test_id][id_type] = 0
 
-    # Check if we've seen this ID before
+    if key not in _id_counters:
-    if original_id in _id_normalizers[test_id][id_type]:
+        _id_counters[key] = {}
-        return _id_normalizers[test_id][id_type][original_id]
 
-    # New ID - assign next counter value
+    counter = _id_counters[key].get(kind, 0) + 1
-    _id_counters[test_id][id_type] += 1
+    _id_counters[key][kind] = counter
-    counter = _id_counters[test_id][id_type]
-    normalized_id = f"{id_type}-{counter}"
 
-    # Store mapping
+    return f"{prefix}{counter}"
-    _id_normalizers[test_id][id_type][original_id] = normalized_id
-    return normalized_id
 
 
-def _normalize_file_ids(obj: Any) -> Any:
+class _IdCanonicalizer:
-    """Recursively replace file IDs and vector store IDs with test-specific normalized values.
+    PATTERN = re.compile(r"(file-[A-Za-z0-9_-]+|vs_[A-Za-z0-9_-]+|batch_[A-Za-z0-9_-]+)")
 
-    Each unique file ID or UUID gets a unique normalized value using a sequential counter
+    def __init__(self) -> None:
-    within each test (file-1, file-2, uuid-1, etc).
+        self._mappings: dict[str, dict[str, str]] = {kind: {} for kind in _ID_KIND_PREFIXES}
-    """
+        self._counters: dict[str, int] = dict.fromkeys(_ID_KIND_PREFIXES, 0)
-    import re
 
-    if isinstance(obj, dict):
+    def canonicalize(self, obj: Any) -> Any:
-        result = {}
+        if isinstance(obj, dict):
-        for k, v in obj.items():
+            return {k: self._canonicalize_value(k, v) for k, v in obj.items()}
-            # Normalize file IDs in document_id fields
+        if isinstance(obj, list):
-            if k == "document_id" and isinstance(v, str) and v.startswith("file-"):
+            return [self.canonicalize(item) for item in obj]
-                result[k] = _get_normalized_id(v, "file")
+        if isinstance(obj, str):
-            # Normalize vector database/store IDs with UUID patterns
+            return self._canonicalize_string(obj)
-            elif k in ("vector_db_id", "vector_store_id", "bank_id") and isinstance(v, str):
-                # Replace UUIDs in the ID deterministically
-                def replace_uuid(match):
-                    uuid_val = match.group(0)
-                    return _get_normalized_id(uuid_val, "uuid")
-
-                normalized = re.sub(
-                    r"[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}",
-                    replace_uuid,
-                    v,
-                )
-                result[k] = normalized
-            else:
-                result[k] = _normalize_file_ids(v)
-        return result
-    elif isinstance(obj, list):
-        return [_normalize_file_ids(item) for item in obj]
-    elif isinstance(obj, str):
-        # Replace file-<uuid> patterns in strings (like in text content)
-        def replace_file_id(match):
-            file_id = match.group(0)
-            return _get_normalized_id(file_id, "file")
-
-        return re.sub(r"file-[a-f0-9]{32}", replace_file_id, obj)
-    else:
         return obj
 
+    def _canonicalize_value(self, key: str, value: Any) -> Any:
+        if key in {"vector_db_id", "vector_store_id", "bank_id"} and isinstance(value, str):
+            return self._canonicalize_string(value)
+        if key == "document_id" and isinstance(value, str) and value.startswith("file-"):
+            return self._canonicalize_string(value)
+        return self.canonicalize(value)
 
-def _get_current_test_id_mappings() -> dict[str, str]:
+    def _canonicalize_string(self, value: str) -> str:
-    """Get the current test's ID normalization mappings.
+        def replace(match: re.Match[str]) -> str:
+            token = match.group(0)
+            if token.startswith("file-"):
+                return self._mapped_value("file", token)
+            if token.startswith("vs_"):
+                return self._mapped_value("vector_store", token)
+            if token.startswith("batch_"):
+                return self._mapped_value("vector_store_file_batch", token)
+            return token
 
-    Returns a dict mapping normalized_id -> original_id (e.g., "file-1" -> "file-abc123...")
+        return self.PATTERN.sub(replace, value)
-    This is the inverse of what's stored in _id_normalizers.
-    """
-    global _id_normalizers
 
-    test_id = _test_context.get()
+    def _mapped_value(self, kind: str, original: str) -> str:
-    if not test_id or test_id not in _id_normalizers:
+        mapping = self._mappings[kind]
-        return {}
+        if original not in mapping:
+            self._counters[kind] += 1
+            mapping[original] = f"{_ID_KIND_PREFIXES[kind]}{self._counters[kind]}"
+        return mapping[original]
 
-    # Invert the mapping: normalized_id -> original_id
-    result = {}
-    for id_type, mappings in _id_normalizers[test_id].items():
-        for original_id, normalized_id in mappings.items():
-            result[normalized_id] = original_id
 
-    return result
+def _canonicalize_for_hashing(obj: Any) -> Any:
+    canonicalizer = _IdCanonicalizer()
+    return canonicalizer.canonicalize(obj)
 
 
 def _chunk_text_content(chunk: Any) -> tuple[str | None, bool]:
@@ -205,7 +183,7 @@ def _ends_with_partial_identifier(text: str) -> bool:
     else:
         core = token
 
-    suffix = core[len("file-"):]
+    suffix = core[len("file-") :]
     if len(suffix) < 16:
         return True
     if not re.fullmatch(r"[A-Za-z0-9_-]+", suffix):
@@ -260,67 +238,11 @@ def _coalesce_streaming_chunks(chunks: list[Any]) -> list[Any]:
     return result
 
 
-def _denormalize_response(obj: Any, recorded_mapping: dict[str, str], current_mapping: dict[str, str]) -> Any:
+def _deterministic_id_override(kind: str, factory: Callable[[], str]) -> str:
-    """Replace recorded IDs with current runtime IDs in a response object.
+    deterministic_id = _allocate_test_scoped_id(kind)
-
+    if deterministic_id is not None:
-    Args:
+        return deterministic_id
-        obj: The response object to denormalize
+    return factory()
-        recorded_mapping: normalized_id -> recorded_original_id (from recording file)
-        current_mapping: normalized_id -> current_original_id (from current runtime)
-
-    Returns:
-        The response with all recorded IDs replaced with current IDs
-    """
-    import re
-
-    # Build reverse mapping: recorded_original_id -> current_original_id
-    # via the normalized intermediary
-    id_translation = {}
-    for normalized_id, recorded_id in recorded_mapping.items():
-        if normalized_id in current_mapping:
-            current_id = current_mapping[normalized_id]
-            id_translation[recorded_id] = current_id
-
-    if isinstance(obj, dict):
-        result = {}
-        for k, v in obj.items():
-            # Translate document_id fields
-            if k == "document_id" and isinstance(v, str):
-                result[k] = id_translation.get(v, v)
-            # Translate vector database/store IDs
-            elif k in ("vector_db_id", "vector_store_id", "bank_id") and isinstance(v, str):
-                # Replace any recorded IDs in the value
-                translated = v
-                for recorded_id, current_id in id_translation.items():
-                    translated = translated.replace(recorded_id, current_id)
-                result[k] = translated
-            else:
-                result[k] = _denormalize_response(v, recorded_mapping, current_mapping)
-        return result
-    elif isinstance(obj, list):
-        return [_denormalize_response(item, recorded_mapping, current_mapping) for item in obj]
-    elif hasattr(obj, "model_dump"):
-        # Handle Pydantic/BaseModel instances by denormalizing their dict form
-        data = obj.model_dump(mode="python")
-        denormalized = _denormalize_response(data, recorded_mapping, current_mapping)
-
-        cls = obj.__class__
-        try:
-            return cls.model_validate(denormalized)
-        except Exception:
-            try:
-                return cls.model_construct(**denormalized)
-            except Exception:
-                return denormalized
-    elif isinstance(obj, str):
-        # Replace file-<uuid> patterns in strings (like in text content and citations)
-        translated = obj
-        for recorded_id, current_id in id_translation.items():
-            # Handle both bare file IDs and citation format <|file-...|>
-            translated = translated.replace(recorded_id, current_id)
-        return translated
-    else:
-        return obj
 
 
 def normalize_inference_request(method: str, url: str, headers: dict[str, Any], body: dict[str, Any]) -> str:
@@ -337,13 +259,10 @@ def normalize_inference_request(method: str, url: str, headers: dict[str, Any],
 
     parsed = urlparse(url)
 
-    # Normalize file IDs in the body to ensure consistent hashing across test runs
-    normalized_body = _normalize_file_ids(body)
-
     normalized: dict[str, Any] = {
         "method": method.upper(),
         "endpoint": parsed.path,
-        "body": normalized_body,
+        "body": _canonicalize_for_hashing(body),
     }
 
     # Include test_id for isolation, except for shared infrastructure endpoints
@@ -357,10 +276,11 @@ def normalize_inference_request(method: str, url: str, headers: dict[str, Any],
 
 def normalize_tool_request(provider_name: str, tool_name: str, kwargs: dict[str, Any]) -> str:
     """Create a normalized hash of the tool request for consistent matching."""
-    # Normalize file IDs and vector store IDs in kwargs
+    normalized = {
-    normalized_kwargs = _normalize_file_ids(kwargs)
+        "provider": provider_name,
-
+        "tool_name": tool_name,
-    normalized = {"provider": provider_name, "tool_name": tool_name, "kwargs": normalized_kwargs}
+        "kwargs": _canonicalize_for_hashing(kwargs),
+    }
 
     # Create hash - sort_keys=True ensures deterministic ordering
     normalized_json = json.dumps(normalized, sort_keys=True)
@@ -514,9 +434,6 @@ def _normalize_response(data: dict[str, Any], request_hash: str) -> dict[str, An
     if "eval_duration" in data and data["eval_duration"] is not None:
         data["eval_duration"] = 0
 
-    # Normalize file IDs and vector store IDs to ensure consistent hashing across replays
-    data = _normalize_file_ids(data)
-
     return data
 
 
@@ -565,6 +482,8 @@ class ResponseStorage:
     def __init__(self, base_dir: Path):
         self.base_dir = base_dir
         # Don't create responses_dir here - determine it per-test at runtime
+        self._legacy_index: dict[str, Path] = {}
+        self._scanned_dirs: set[Path] = set()
 
     def _get_test_dir(self) -> Path:
         """Get the recordings directory in the test file's parent directory.
@@ -627,7 +546,7 @@ class ResponseStorage:
                     "test_id": _test_context.get(),
                     "request": request,
                     "response": serialized_response,
-                    "id_normalization_mapping": _get_current_test_id_mappings(),
+                    "id_normalization_mapping": {},
                 },
                 f,
                 indent=2,
@@ -635,6 +554,8 @@ class ResponseStorage:
             f.write("\n")
             f.flush()
 
+        self._legacy_index[request_hash] = response_path
+
     def find_recording(self, request_hash: str) -> dict[str, Any] | None:
         """Find a recorded response by request hash.
 
@@ -658,6 +579,52 @@ class ResponseStorage:
         if fallback_path.exists():
             return _recording_from_file(fallback_path)
 
+        return self._find_in_legacy_index(request_hash, [test_dir, fallback_dir])
+
+    def _find_in_legacy_index(self, request_hash: str, directories: list[Path]) -> dict[str, Any] | None:
+        for directory in directories:
+            if not directory.exists() or directory in self._scanned_dirs:
+                continue
+
+            for path in directory.glob("*.json"):
+                try:
+                    with open(path) as f:
+                        data = json.load(f)
+                except Exception:
+                    continue
+
+                request = data.get("request")
+                if not request:
+                    continue
+
+                body = request.get("body")
+                canonical_body = _canonicalize_for_hashing(body) if isinstance(body, dict | list) else body
+
+                token = None
+                test_id = data.get("test_id")
+                if test_id:
+                    token = _test_context.set(test_id)
+
+                try:
+                    legacy_hash = normalize_inference_request(
+                        request.get("method", ""),
+                        request.get("url", ""),
+                        request.get("headers", {}),
+                        canonical_body,
+                    )
+                finally:
+                    if token is not None:
+                        _test_context.reset(token)
+
+                if legacy_hash not in self._legacy_index:
+                    self._legacy_index[legacy_hash] = path
+
+            self._scanned_dirs.add(directory)
+
+        legacy_path = self._legacy_index.get(request_hash)
+        if legacy_path and legacy_path.exists():
+            return _recording_from_file(legacy_path)
+
         return None
 
     def _model_list_responses(self, request_hash: str) -> list[dict[str, Any]]:
@@ -685,6 +652,14 @@ def _recording_from_file(response_path) -> dict[str, Any]:
     with open(response_path) as f:
         data = json.load(f)
 
+    mapping = data.get("id_normalization_mapping") or {}
+    if mapping:
+        serialized = json.dumps(data)
+        for normalized, original in mapping.items():
+            serialized = serialized.replace(original, normalized)
+        data = json.loads(serialized)
+        data["id_normalization_mapping"] = {}
+
     # Deserialize response body if needed
     if "response" in data and "body" in data["response"]:
         if isinstance(data["response"]["body"], list):
@@ -759,7 +734,7 @@ async def _patched_tool_invoke_method(
     original_method, provider_name: str, self, tool_name: str, kwargs: dict[str, Any]
 ):
     """Patched version of tool runtime invoke_tool method for recording/replay."""
-    global _current_mode, _current_storage, _id_normalizers
+    global _current_mode, _current_storage
 
     if _current_mode == APIRecordingMode.LIVE or _current_storage is None:
         # Normal operation
@@ -808,7 +783,7 @@ async def _patched_tool_invoke_method(
 
 
 async def _patched_inference_method(original_method, self, client_type, endpoint, *args, **kwargs):
-    global _current_mode, _current_storage, _id_normalizers
+    global _current_mode, _current_storage
 
     mode = _current_mode
     storage = _current_storage
@@ -864,45 +839,6 @@ async def _patched_inference_method(original_method, self, client_type, endpoint
                 if recording["response"].get("is_streaming", False) and isinstance(response_body, list):
                     response_body = _coalesce_streaming_chunks(response_body)
 
-                recording["response"]["body"] = response_body
-
-                # Denormalize the response: replace recorded IDs with current runtime IDs
-                recorded_mapping = recording.get("id_normalization_mapping", {})
-                current_mapping = _get_current_test_id_mappings()
-
-                if recorded_mapping or current_mapping:
-                    import sys
-                    print(f"\n=== DENORM DEBUG ===", file=sys.stderr)
-                    print(f"Recorded mapping: {recorded_mapping}", file=sys.stderr)
-                    print(f"Current mapping: {current_mapping}", file=sys.stderr)
-                    print(f"_id_normalizers before: {_id_normalizers.get(_test_context.get(), {})}", file=sys.stderr)
-
-                    response_body = _denormalize_response(response_body, recorded_mapping, current_mapping)
-
-                    # Update _id_normalizers to register the current IDs with their normalized values
-                    # This ensures that if these IDs appear in future requests, they get the same
-                    # normalized value as they had in the recording
-                    test_id = _test_context.get()
-                    if test_id and recorded_mapping:
-                        for normalized_id, recorded_id in recorded_mapping.items():
-                            if normalized_id in current_mapping:
-                                current_id = current_mapping[normalized_id]
-                                # Extract ID type from normalized_id (e.g., "file-1" -> "file")
-                                id_type = normalized_id.rsplit("-", 1)[0]
-
-                                # Ensure structures exist
-                                if test_id not in _id_normalizers:
-                                    _id_normalizers[test_id] = {}
-                                if id_type not in _id_normalizers[test_id]:
-                                    _id_normalizers[test_id][id_type] = {}
-
-                                # Register: current_id -> normalized_id
-                                _id_normalizers[test_id][id_type][current_id] = normalized_id
-                                print(f"Registered {current_id} -> {normalized_id}", file=sys.stderr)
-
-                    print(f"_id_normalizers after: {_id_normalizers.get(_test_context.get(), {})}", file=sys.stderr)
-                    print(f"=== END DENORM DEBUG ===\n", file=sys.stderr)
-
                 if recording["response"].get("is_streaming", False):
 
                     async def replay_stream():
@@ -1125,6 +1061,7 @@ def api_recording(mode: str, storage_dir: str | Path | None = None) -> Generator
     # Store previous state
     prev_mode = _current_mode
     prev_storage = _current_storage
+    override_token = None
 
     try:
         _current_mode = mode
@@ -1133,7 +1070,9 @@ def api_recording(mode: str, storage_dir: str | Path | None = None) -> Generator
             if storage_dir is None:
                 raise ValueError("storage_dir is required for record, replay, and record-if-missing modes")
             _current_storage = ResponseStorage(Path(storage_dir))
+            _id_counters.clear()
             patch_inference_clients()
+            override_token = set_id_override(_deterministic_id_override)
 
         yield
 
@@ -1141,6 +1080,8 @@ def api_recording(mode: str, storage_dir: str | Path | None = None) -> Generator
         # Restore previous state
         if mode in ["record", "replay", "record-if-missing"]:
             unpatch_inference_clients()
+            if override_token is not None:
+                reset_id_override(override_token)
 
         _current_mode = prev_mode
         _current_storage = prev_storage