fix(anthropic): auto-detect Bedrock model IDs in normalize_model_name (#12295)

Bedrock model IDs use dots as namespace separators (anthropic.claude-opus-4-7,
us.anthropic.claude-sonnet-4-5-v1:0), not version separators.
normalize_model_name() was unconditionally converting all dots to hyphens,
producing invalid IDs that Bedrock rejects with HTTP 400/404.

This affected both the main agent loop (partially mitigated by
_anthropic_preserve_dots in run_agent.py) and all auxiliary client calls
(compression, session_search, vision, etc.) which go through
_AnthropicCompletionsAdapter and never pass preserve_dots=True.

Fix: add _is_bedrock_model_id() to detect Bedrock namespace prefixes
(anthropic., us., eu., ap., jp., global.) and skip dot-to-hyphen
conversion for these IDs regardless of the preserve_dots flag.

agent/anthropic_adapter.py

@@ -986,6 +986,26 @@ def read_hermes_oauth_credentials() -> Optional[Dict[str, Any]]:
 # ---------------------------------------------------------------------------
 
 
+def _is_bedrock_model_id(model: str) -> bool:
+    """Detect AWS Bedrock model IDs that use dots as namespace separators.
+
+    Bedrock model IDs come in two forms:
+    - Bare:    ``anthropic.claude-opus-4-7``
+    - Regional (inference profiles): ``us.anthropic.claude-sonnet-4-5-v1:0``
+
+    In both cases the dots separate namespace components, not version
+    numbers, and must be preserved verbatim for the Bedrock API.
+    """
+    lower = model.lower()
+    # Regional inference-profile prefixes
+    if any(lower.startswith(p) for p in ("global.", "us.", "eu.", "ap.", "jp.")):
+        return True
+    # Bare Bedrock model IDs: provider.model-family
+    if lower.startswith("anthropic."):
+        return True
+    return False
+
+
 def normalize_model_name(model: str, preserve_dots: bool = False) -> str:
     """Normalize a model name for the Anthropic API.
 
@@ -993,11 +1013,19 @@ def normalize_model_name(model: str, preserve_dots: bool = False) -> str:
     - Converts dots to hyphens in version numbers (OpenRouter uses dots,
       Anthropic uses hyphens: claude-opus-4.6 → claude-opus-4-6), unless
       preserve_dots is True (e.g. for Alibaba/DashScope: qwen3.5-plus).
+    - Preserves Bedrock model IDs (``anthropic.claude-opus-4-7``) and
+      regional inference profiles (``us.anthropic.claude-*``) whose dots
+      are namespace separators, not version separators.
     """
     lower = model.lower()
     if lower.startswith("anthropic/"):
         model = model[len("anthropic/"):]
     if not preserve_dots:
+        # Bedrock model IDs use dots as namespace separators
+        # (e.g. "anthropic.claude-opus-4-7", "us.anthropic.claude-*").
+        # These must not be converted to hyphens.  See issue #12295.
+        if _is_bedrock_model_id(model):
+            return model
         # OpenRouter uses dots for version separators (claude-opus-4.6),
         # Anthropic uses hyphens (claude-opus-4-6). Convert dots to hyphens.
         model = model.replace(".", "-")

tests/agent/test_bedrock_integration.py

@@ -376,17 +376,15 @@ class TestBedrockModelNameNormalization:
             "apac.anthropic.claude-haiku-4-5", preserve_dots=True
         ) == "apac.anthropic.claude-haiku-4-5"
 
-    def test_preserve_false_mangles_as_documented(self):
+    def test_bedrock_prefix_preserved_without_preserve_dots(self):
-        """Canary: with ``preserve_dots=False`` the function still
+        """Bedrock inference profile IDs are auto-detected by prefix and
-        produces the broken all-hyphen form — this is the shape that
+        always returned unmangled -- ``preserve_dots`` is irrelevant for
-        Bedrock rejected and that the fix avoids.  Keeping this test
+        these IDs because the dots are namespace separators, not version
-        locks in the existing behaviour of ``normalize_model_name`` so a
+        separators.  Regression for #12295."""
-        future refactor doesn't accidentally decouple the knob from its
-        effect."""
         from agent.anthropic_adapter import normalize_model_name
         assert normalize_model_name(
             "global.anthropic.claude-opus-4-7", preserve_dots=False
-        ) == "global-anthropic-claude-opus-4-7"
+        ) == "global.anthropic.claude-opus-4-7"
 
     def test_bare_foundation_model_id_preserved(self):
         """Non-inference-profile Bedrock IDs
@@ -422,12 +420,11 @@ class TestBedrockBuildAnthropicKwargsEndToEnd:
             f"{kwargs['model']!r}"
         )
 
-    def test_bedrock_model_mangled_without_preserve_dots(self):
+    def test_bedrock_model_preserved_without_preserve_dots(self):
-        """Inverse canary: without the flag, ``build_anthropic_kwargs``
+        """Bedrock inference profile IDs survive ``build_anthropic_kwargs``
-        still produces the broken form — so the fix in
+        even without ``preserve_dots=True`` -- the prefix auto-detection
-        ``_anthropic_preserve_dots`` is the load-bearing piece that
+        in ``normalize_model_name`` is the load-bearing piece.
-        wires ``preserve_dots=True`` through to this builder for the
+        Regression for #12295."""
-        Bedrock case."""
         from agent.anthropic_adapter import build_anthropic_kwargs
         kwargs = build_anthropic_kwargs(
             model="global.anthropic.claude-opus-4-7",
@@ -437,4 +434,62 @@ class TestBedrockBuildAnthropicKwargsEndToEnd:
             reasoning_config=None,
             preserve_dots=False,
         )
-        assert kwargs["model"] == "global-anthropic-claude-opus-4-7"
+        assert kwargs["model"] == "global.anthropic.claude-opus-4-7"
+
+
+class TestBedrockModelIdDetection:
+    """Tests for ``_is_bedrock_model_id`` and the auto-detection that
+    makes ``normalize_model_name`` preserve dots for Bedrock IDs
+    regardless of ``preserve_dots``.  Regression for #12295."""
+
+    def test_bare_bedrock_id_detected(self):
+        from agent.anthropic_adapter import _is_bedrock_model_id
+        assert _is_bedrock_model_id("anthropic.claude-opus-4-7") is True
+
+    def test_regional_us_prefix_detected(self):
+        from agent.anthropic_adapter import _is_bedrock_model_id
+        assert _is_bedrock_model_id("us.anthropic.claude-sonnet-4-5-v1:0") is True
+
+    def test_regional_global_prefix_detected(self):
+        from agent.anthropic_adapter import _is_bedrock_model_id
+        assert _is_bedrock_model_id("global.anthropic.claude-opus-4-7") is True
+
+    def test_regional_eu_prefix_detected(self):
+        from agent.anthropic_adapter import _is_bedrock_model_id
+        assert _is_bedrock_model_id("eu.anthropic.claude-sonnet-4-6") is True
+
+    def test_openrouter_format_not_detected(self):
+        from agent.anthropic_adapter import _is_bedrock_model_id
+        assert _is_bedrock_model_id("claude-opus-4.6") is False
+
+    def test_bare_claude_not_detected(self):
+        from agent.anthropic_adapter import _is_bedrock_model_id
+        assert _is_bedrock_model_id("claude-opus-4-7") is False
+
+    def test_bare_bedrock_id_preserved_without_flag(self):
+        """The primary bug from #12295: ``anthropic.claude-opus-4-7``
+        sent to bedrock-mantle via auxiliary clients that don't pass
+        ``preserve_dots=True``."""
+        from agent.anthropic_adapter import normalize_model_name
+        assert normalize_model_name(
+            "anthropic.claude-opus-4-7", preserve_dots=False
+        ) == "anthropic.claude-opus-4-7"
+
+    def test_openrouter_dots_still_converted(self):
+        """Non-Bedrock dotted model names must still be converted."""
+        from agent.anthropic_adapter import normalize_model_name
+        assert normalize_model_name("claude-opus-4.6") == "claude-opus-4-6"
+
+    def test_bare_bedrock_id_survives_build_kwargs(self):
+        """End-to-end: bare Bedrock ID through ``build_anthropic_kwargs``
+        without ``preserve_dots=True`` -- the auxiliary client path."""
+        from agent.anthropic_adapter import build_anthropic_kwargs
+        kwargs = build_anthropic_kwargs(
+            model="anthropic.claude-opus-4-7",
+            messages=[{"role": "user", "content": "hi"}],
+            tools=None,
+            max_tokens=1024,
+            reasoning_config=None,
+            preserve_dots=False,
+        )
+        assert kwargs["model"] == "anthropic.claude-opus-4-7"