trustgraph-base/trustgraph/base/text_completion_client.py

- New TextCompletionResult dataclass: text: Optional[str],
  in_token, out_token, model.
- text_completion(system, prompt, timeout=600) — non-streaming
  only. Returns TextCompletionResult with text set and
  tokens/model populated from the response.
- New text_completion_stream(system, prompt, handler,
  timeout=600) — streaming. Invokes handler(chunk) with each
  TextCompletionResponse as it arrives (including the final one,
  so the caller can see end_of_stream). Raises on
  resp.error. Returns a TextCompletionResult with text=None and
  in_token/out_token/model pulled from the final message.
- Old streaming= kwarg on text_completion() is gone.

trustgraph-base/trustgraph/base/__init__.py
- Export TextCompletionClient and TextCompletionResult alongside
  the spec.

trustgraph-flow/trustgraph/prompt/template/service.py
- Non-streaming path now uses await
  ...text_completion(system=..., prompt=...) and reads
  result.text. The llm() callback still returns a plain string to
  PromptManager, preserving its contract.
- Streaming path collapsed onto text_completion_stream(...,
  handler=forward_chunks). Removed the hand-rolled
  client.request(...) + TextCompletionRequest plumbing. The
  is_final / resp.error behavior is preserved (forward_chunks
  still checks end_of_stream; errors are now raised centrally by
  the client).
- Dropped the now-unused TextCompletionRequest,
  TextCompletionResponse import.

Token counts are now available to any TextCompletionClient caller
- result.in_token / result.out_token / result.model — in both
modes. Nothing in the prompt service consumes them yet; that's
the next step on this branch.

trustgraph-base/trustgraph/base/__init__.py

@@ -18,7 +18,9 @@ from . librarian_client import LibrarianClient
 from . chunking_service import ChunkingService
 from . embeddings_service import EmbeddingsService
 from . embeddings_client import EmbeddingsClientSpec
-from . text_completion_client import TextCompletionClientSpec
+from . text_completion_client import (
+    TextCompletionClientSpec, TextCompletionClient, TextCompletionResult,
+)
 from . prompt_client import PromptClientSpec
 from . triples_store_service import TriplesStoreService
 from . graph_embeddings_store_service import GraphEmbeddingsStoreService

trustgraph-base/trustgraph/base/text_completion_client.py

@@ -1,47 +1,71 @@
 
+from dataclasses import dataclass
+from typing import Optional
+
 from . request_response_spec import RequestResponse, RequestResponseSpec
 from .. schema import TextCompletionRequest, TextCompletionResponse
 
+@dataclass
+class TextCompletionResult:
+    text: Optional[str]
+    in_token: int = 0
+    out_token: int = 0
+    model: str = ""
+
 class TextCompletionClient(RequestResponse):
-    async def text_completion(self, system, prompt, streaming=False, timeout=600):
-        # If not streaming, use original behavior
-        if not streaming:
-            resp = await self.request(
-                TextCompletionRequest(
-                    system = system, prompt = prompt, streaming = False
-                ),
-                timeout=timeout
-            )
 
-            if resp.error:
-                raise RuntimeError(resp.error.message)
+    async def text_completion(self, system, prompt, timeout=600):
 
-            return resp.response
-
-        # For streaming: collect all chunks and return complete response
-        full_response = ""
-
-        async def collect_chunks(resp):
-            nonlocal full_response
-
-            if resp.error:
-                raise RuntimeError(resp.error.message)
-
-            if resp.response:
-                full_response += resp.response
-
-            # Return True when end_of_stream is reached
-            return getattr(resp, 'end_of_stream', False)
-
-        await self.request(
+        resp = await self.request(
             TextCompletionRequest(
-                system = system, prompt = prompt, streaming = True
+                system = system, prompt = prompt, streaming = False
             ),
-            recipient=collect_chunks,
             timeout=timeout
         )
 
-        return full_response
+        if resp.error:
+            raise RuntimeError(resp.error.message)
+
+        return TextCompletionResult(
+            text = resp.response,
+            in_token = getattr(resp, "in_token", 0) or 0,
+            out_token = getattr(resp, "out_token", 0) or 0,
+            model = getattr(resp, "model", "") or "",
+        )
+
+    async def text_completion_stream(
+            self, system, prompt, handler, timeout=600,
+    ):
+        """
+        Streaming text completion. `handler` is an async callable invoked
+        once per chunk with the chunk's TextCompletionResponse. Returns a
+        TextCompletionResult with text=None and token counts / model taken
+        from the end_of_stream message.
+        """
+
+        async def on_chunk(resp):
+
+            if resp.error:
+                raise RuntimeError(resp.error.message)
+
+            await handler(resp)
+
+            return getattr(resp, "end_of_stream", False)
+
+        final = await self.request(
+            TextCompletionRequest(
+                system = system, prompt = prompt, streaming = True
+            ),
+            recipient=on_chunk,
+            timeout=timeout,
+        )
+
+        return TextCompletionResult(
+            text = None,
+            in_token = getattr(final, "in_token", 0) or 0,
+            out_token = getattr(final, "out_token", 0) or 0,
+            model = getattr(final, "model", "") or "",
+        )
 
 class TextCompletionClientSpec(RequestResponseSpec):
     def __init__(
@@ -54,4 +78,3 @@ class TextCompletionClientSpec(RequestResponseSpec):
             response_schema = TextCompletionResponse,
             impl = TextCompletionClient,
         )
-