feat(llm): add session_id for retries and summarize for run tracking

HypothesisAgent now opens an OpusAgent session on first attempt and
reuses it for parse-error retries — Claude sees full conversation
context instead of re-stuffing the prompt. Sessions are closed after
propose() completes. All completions set summarize=true so topics
accumulate incremental summaries of GA activity.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/multi_swarm_core/multi_swarm_core/agents/hypothesis.py

@@ -288,19 +288,12 @@ def _render_focus_block(keys: list[str], market: MarketSummary) -> str:
 
 
 _RETRY_TEMPLATE = """\
-{original_user}
+Il JSON che hai generato contiene un errore: {previous_error}
 
---- TENTATIVO PRECEDENTE FALLITO ---
-Output: {previous_raw}
-Errore: {previous_error}
----
-Correggi l'errore e rispondi di nuovo con un singolo oggetto JSON valido
-dentro fence ```json...```, seguendo strettamente lo schema fornito nel
-SYSTEM message.
+Correggi e rispondi di nuovo con un singolo oggetto JSON valido
+dentro fence ```json...```, seguendo strettamente lo schema fornito.
 """
 
-_RETRY_RAW_TRUNCATE = 800
-
 
 _JSON_FENCE_RE = re.compile(
     r"```(?:json)?\s*(\{[\s\S]*\})\s*```",
@@ -429,20 +422,23 @@ class HypothesisAgent:
         errors: list[str] = []
         last_raw = ""
         max_attempts = 1 + self._max_retries
+        session_id: str | None = None
 
+        try:
             for attempt in range(max_attempts):
                 if attempt == 0:
                     user = original_user
+                    req_session_id = "new"
                 else:
-                truncated = last_raw[:_RETRY_RAW_TRUNCATE]
-                user = _RETRY_TEMPLATE.format(
-                    original_user=original_user,
-                    previous_raw=truncated,
-                    previous_error=errors[-1],
-                )
+                    user = _RETRY_TEMPLATE.format(previous_error=errors[-1])
+                    req_session_id = session_id or "new"
 
                 try:
-                completion = self._llm.complete(genome, system=system, user=user)
+                    completion = self._llm.complete(
+                        genome, system=system, user=user,
+                        session_id=req_session_id,
+                        summarize=True,
+                    )
                 except EmptyCompletionError as e:
                     errors.append(f"empty_completion: {e}")
                     last_raw = ""
@@ -457,6 +453,8 @@ class HypothesisAgent:
                     continue
                 completions.append(completion)
                 last_raw = completion.text
+                if completion.session_id:
+                    session_id = completion.session_id
 
                 strategy, err = _try_parse(completion.text)
                 if strategy is not None:
@@ -469,6 +467,9 @@ class HypothesisAgent:
                     )
                 assert err is not None
                 errors.append(err)
+        finally:
+            if session_id:
+                self._llm.close_session(session_id)
 
         chained = " | ".join(
             f"attempt {i + 1}: {e}" for i, e in enumerate(errors)

src/multi_swarm_core/multi_swarm_core/llm/client.py

@@ -54,6 +54,7 @@ class CompletionResult:
     output_tokens: int
     tier: ModelTier
     model: str
+    session_id: str | None = None
 
 
 class LLMClient:
@@ -138,6 +139,12 @@ class LLMClient:
             f"Request {request_id} timed out after {self._poll_timeout}s"
         )
 
+    def close_session(self, session_id: str) -> None:
+        try:
+            self._client.delete(f"/api/sessions/{session_id}")
+        except httpx.HTTPError:
+            logger.debug("Failed to close session %s", session_id)
+
     @retry(
         stop=stop_after_attempt(3),
         wait=wait_exponential(multiplier=2.0, min=2.0, max=30.0),
@@ -150,15 +157,23 @@ class LLMClient:
         system: str,
         user: str,
         max_tokens: int = 2000,
+        session_id: str | None = None,
+        summarize: bool = False,
     ) -> CompletionResult:
         model = self._tier_map[genome.model_tier]
         topic_id = self._get_or_create_topic(system)
 
-        resp = self._client.post("/api/requests", json={
+        body: dict = {
             "topic_id": topic_id,
             "prompt": user,
             "model": model,
-        })
+        }
+        if session_id is not None:
+            body["session_id"] = session_id
+        if summarize:
+            body["summarize"] = True
+
+        resp = self._client.post("/api/requests", json=body)
 
         if resp.status_code == 429:
             raise OpusAgentTransientError("Rate limited")
@@ -180,4 +195,5 @@ class LLMClient:
             output_tokens=0,
             tier=genome.model_tier,
             model=model,
+            session_id=result.get("session_id"),
         )

src/multi_swarm_core/tests/unit/test_llm_client.py

@@ -34,13 +34,16 @@ REQUEST_ACCEPTED = {
 }
 
 
-def _completed_response(text: str = "(strategy ...)") -> dict:
+def _completed_response(
+    text: str = "(strategy ...)", session_id: str = "sess-789",
+) -> dict:
     return {
         "success": True,
         "data": {
             "id": "req-456",
             "status": "completed",
             "result": text,
+            "session_id": session_id,
         },
     }
 
@@ -212,3 +215,56 @@ def test_tokens_are_zero():
 
     assert out.input_tokens == 0
     assert out.output_tokens == 0
+
+
+def test_session_id_returned_from_completion():
+    transport = _mock_transport([
+        httpx.Response(201, json=TOPIC_RESPONSE),
+        httpx.Response(202, json=REQUEST_ACCEPTED),
+        httpx.Response(200, json=_completed_response(session_id="sess-abc")),
+    ])
+    client = _make_client(transport)
+    out = client.complete(make_genome(ModelTier.C), system="sys", user="usr", session_id="new")
+
+    assert out.session_id == "sess-abc"
+
+
+def test_session_id_and_summarize_sent_in_request():
+    requests_seen: list[dict] = []
+
+    def handler(request: httpx.Request) -> httpx.Response:
+        if request.method == "POST" and "/requests" in str(request.url):
+            import json
+            requests_seen.append(json.loads(request.content))
+            return httpx.Response(202, json=REQUEST_ACCEPTED)
+        if request.method == "POST" and "/topics" in str(request.url):
+            return httpx.Response(201, json=TOPIC_RESPONSE)
+        return httpx.Response(200, json=_completed_response())
+
+    transport = httpx.MockTransport(handler)
+    client = _make_client(transport)
+    client.complete(
+        make_genome(ModelTier.C), system="sys", user="usr",
+        session_id="sess-existing", summarize=True,
+    )
+
+    assert len(requests_seen) == 1
+    assert requests_seen[0]["session_id"] == "sess-existing"
+    assert requests_seen[0]["summarize"] is True
+
+
+def test_close_session():
+    deleted: list[str] = []
+
+    def handler(request: httpx.Request) -> httpx.Response:
+        if request.method == "DELETE":
+            deleted.append(str(request.url))
+            return httpx.Response(200, json={"success": True})
+        return httpx.Response(200, json={"success": True})
+
+    transport = httpx.MockTransport(handler)
+    client = _make_client(transport)
+    client.close_session("sess-to-close")
+
+    assert len(deleted) == 1
+    assert "sess-to-close" in deleted[0]