lyra/llm.py

@@ -37,30 +37,45 @@ def _resolved_model(cfg, backend: Backend, model: str | None) -> str:
     return model or cfg.local_model
 
 
-def complete(messages: list[Message], backend: Backend = "local", model: str | None = None) -> str:
+def complete(messages: list[Message], backend: Backend = "local", model: str | None = None,
+             max_tokens: int | None = None, timeout: float | None = None) -> str:
     """Generate a completion. `model` overrides the backend's default model
-    (used so live chat can run a stronger cloud model than bulk consolidation)."""
+    (used so live chat can run a stronger cloud model than bulk consolidation).
+
+    `max_tokens` caps the generation length (guards a slow local model against
+    rambling for thousands of tokens). `timeout`, when set, bounds each request
+    and disables the SDK's own retries so the caller owns retry/fallback policy.
+    Both default to None → unchanged behavior for every existing caller."""
     cfg = load()
     mdl = _resolved_model(cfg, backend, model)
     logbus.log("info", "llm call", kind="complete", backend=backend, model=mdl, tok=_approx_tok(messages))
     t0 = time.monotonic()
 
-    if backend == "cloud":
+    if backend in ("cloud", "mi50"):
-        if not cfg.openai_api_key:
+        if backend == "cloud":
-            raise RuntimeError("OPENAI_API_KEY is not set")
+            if not cfg.openai_api_key:
-        client = OpenAI(api_key=cfg.openai_api_key)
+                raise RuntimeError("OPENAI_API_KEY is not set")
-        resp = client.chat.completions.create(model=mdl, messages=messages)
+            client_kwargs: dict = {"api_key": cfg.openai_api_key}
-        out = resp.choices[0].message.content or ""
+        else:
-    elif backend == "mi50":
+            # MI50 box runs an OpenAI-compatible llama.cpp server; key is unused.
-        # MI50 box runs an OpenAI-compatible llama.cpp server; key is unused.
+            client_kwargs = {"api_key": "not-needed", "base_url": cfg.mi50_base_url}
-        client = OpenAI(api_key="not-needed", base_url=cfg.mi50_base_url)
+        if timeout is not None:
-        resp = client.chat.completions.create(model=mdl, messages=messages)
+            client_kwargs["timeout"] = timeout
+            client_kwargs["max_retries"] = 0  # caller owns retries (see summary.py)
+        client = OpenAI(**client_kwargs)
+        create_kwargs: dict = {"model": mdl, "messages": messages}
+        if max_tokens is not None:
+            create_kwargs["max_tokens"] = max_tokens
+        resp = client.chat.completions.create(**create_kwargs)
         out = resp.choices[0].message.content or ""
     else:
+        payload: dict = {"model": mdl, "messages": messages, "stream": False}
+        if max_tokens is not None:
+            payload["options"] = {"num_predict": max_tokens}
         resp = httpx.post(
             f"{cfg.local_base_url}/api/chat",
-            json={"model": mdl, "messages": messages, "stream": False},
+            json=payload,
-            timeout=120,
+            timeout=timeout or 120,
         )
         resp.raise_for_status()
         out = resp.json()["message"]["content"]

lyra/summary.py

@@ -17,7 +17,16 @@ from concurrent.futures import ThreadPoolExecutor, as_completed
 from lyra import config, llm, logbus, memory
 from lyra.llm import Backend, Message
 
-_RETRIES = 4
+# Consolidation LLM budget. A gist is short (a handful of sentences), so cap the
+# generation hard — an uncapped local model will otherwise ramble for thousands
+# of tokens and, on a slow GPU, blow the request timeout. 768 is ~3x the longest
+# real gist we've stored.
+SUMMARY_MAX_TOKENS = 768
+# Attempts on the primary backend before falling back to cloud.
+MI50_ATTEMPTS = 2
+# Per-call timeout (seconds). A capped 768-token gist finishes in ~60-90s on the
+# MI50; 150s is headroom but bails a hung call fast so fallback isn't slow.
+SUMMARY_TIMEOUT = 150
 
 # Re-summarize a session once it has accumulated this many new raw exchanges.
 SUMMARIZE_AFTER = 20
@@ -61,16 +70,32 @@ def _summarize_text(text: str, backend: Backend) -> str:
         {"role": "system", "content": _PROMPT},
         {"role": "user", "content": text},
     ]
-    # Retry transient backend errors (e.g. the GPU server restarting) with backoff.
+
-    for attempt in range(_RETRIES):
+    def _call(be: Backend) -> str:
+        return llm.complete(messages, backend=be,
+                            max_tokens=SUMMARY_MAX_TOKENS, timeout=SUMMARY_TIMEOUT)
+
+    # Try the primary backend a bounded number of times (each call fast-fails via
+    # SUMMARY_TIMEOUT), with a short backoff for a transient blip / restarting GPU.
+    last_exc: Exception | None = None
+    for attempt in range(MI50_ATTEMPTS):
         try:
-            return llm.complete(messages, backend=backend)
+            return _call(backend)
         except Exception as exc:
-            if attempt == _RETRIES - 1:
+            last_exc = exc
-                raise
+            logbus.log("debug", "summary retry", attempt=attempt + 1,
-            logbus.log("debug", "summary retry", attempt=attempt + 1, error=str(exc)[:80])
+                       backend=backend, error=str(exc)[:80])
-            time.sleep(5 * (attempt + 1))
+            if attempt < MI50_ATTEMPTS - 1:
-    raise RuntimeError("unreachable")
+                time.sleep(5 * (attempt + 1))
+
+    # Primary exhausted. If it wasn't already cloud and cloud is configured, fall
+    # back once so a stuck/offline MI50 doesn't sink consolidation for the night.
+    if backend != "cloud" and config.load().openai_api_key:
+        logbus.log("info", "summary fell back to cloud", primary=backend,
+                   error=str(last_exc)[:80] if last_exc else None)
+        return _call("cloud")
+
+    raise last_exc if last_exc else RuntimeError("summary failed")
 
 
 def _summarize_transcript(transcript: str, backend: Backend) -> str:

tests/test_dream.py

@@ -20,7 +20,7 @@ def lyra(tmp_path, monkeypatch):
     # reflect() expects JSON back; everything else just stores the text.
     monkeypatch.setattr(
         llm, "complete",
-        lambda messages, backend=None, model=None:
+        lambda messages, backend=None, model=None, **_:
         '{"mood":"focused","valence":0.7,"new_reflections":["I got some thinking done."]}',
     )
 

tests/test_llm_bounds.py

@@ -0,0 +1,63 @@
+"""llm.complete: `max_tokens` and `timeout` are threaded into the backend call.
+
+The OpenAI client is faked so nothing hits a network. We assert the generation
+cap reaches the create() call and the fast-fail timeout reaches the client (with
+max_retries=0 so summary.py owns the retry policy, not the SDK).
+"""
+from __future__ import annotations
+
+import types
+
+import pytest
+
+from lyra import llm
+
+
+@pytest.fixture
+def fake_openai(monkeypatch):
+    recorded: dict = {}
+
+    class FakeCompletions:
+        def create(self, **kwargs):
+            recorded["create"] = kwargs
+            msg = types.SimpleNamespace(content="ok")
+            return types.SimpleNamespace(choices=[types.SimpleNamespace(message=msg)])
+
+    class FakeClient:
+        def __init__(self, **kwargs):
+            recorded["client"] = kwargs
+            self.chat = types.SimpleNamespace(completions=FakeCompletions())
+
+    monkeypatch.setattr(llm, "OpenAI", FakeClient)
+    monkeypatch.setattr(llm, "load", lambda: types.SimpleNamespace(
+        mi50_base_url="http://mi50/v1", mi50_model="local-gpu",
+        cloud_model="gpt-4o-mini", openai_api_key="sk-test", local_model="l",
+    ))
+    return recorded
+
+
+def test_mi50_threads_max_tokens_and_timeout(fake_openai):
+    out = llm.complete([{"role": "user", "content": "hi"}],
+                       backend="mi50", max_tokens=768, timeout=150)
+
+    assert out == "ok"
+    assert fake_openai["create"]["max_tokens"] == 768
+    assert fake_openai["client"]["timeout"] == 150
+    assert fake_openai["client"]["max_retries"] == 0
+
+
+def test_cloud_threads_max_tokens_and_timeout(fake_openai):
+    llm.complete([{"role": "user", "content": "hi"}],
+                 backend="cloud", max_tokens=768, timeout=150)
+
+    assert fake_openai["create"]["max_tokens"] == 768
+    assert fake_openai["client"]["timeout"] == 150
+    assert fake_openai["client"]["max_retries"] == 0
+
+
+def test_defaults_omit_cap_and_keep_current_behavior(fake_openai):
+    # No cap / timeout passed -> create() gets no max_tokens, client unbounded.
+    llm.complete([{"role": "user", "content": "hi"}], backend="mi50")
+
+    assert "max_tokens" not in fake_openai["create"]
+    assert "timeout" not in fake_openai["client"]

tests/test_summary_fallback.py

@@ -0,0 +1,97 @@
+"""Summary consolidation: MI50 length cap, fast-fail, and cloud fallback.
+
+Everything is stubbed — no real backend is touched. These drive the behavior of
+`summary._summarize_text`: try the primary backend a bounded number of times with
+a capped generation length, and fall back to cloud if the primary keeps failing.
+"""
+from __future__ import annotations
+
+import types
+
+import pytest
+
+from lyra import summary
+
+
+@pytest.fixture
+def calls(monkeypatch):
+    """Capture every llm.complete call; per-test behavior via `fake.responder`."""
+    recorded: list[dict] = []
+
+    def fake_complete(messages, backend="local", model=None,
+                      max_tokens=None, timeout=None):
+        recorded.append({"backend": backend, "max_tokens": max_tokens, "timeout": timeout})
+        return fake_complete.responder(backend)
+
+    fake_complete.responder = lambda backend: "gist"
+    monkeypatch.setattr(summary.llm, "complete", fake_complete)
+    monkeypatch.setattr(summary.time, "sleep", lambda *_: None)  # instant backoff
+    return types.SimpleNamespace(recorded=recorded, fake=fake_complete)
+
+
+def _set_key(monkeypatch, key="sk-test"):
+    monkeypatch.setattr(summary.config, "load",
+                        lambda: types.SimpleNamespace(openai_api_key=key))
+
+
+def test_falls_back_to_cloud_after_mi50_attempts(calls, monkeypatch):
+    _set_key(monkeypatch)
+
+    def responder(backend):
+        if backend == "mi50":
+            raise RuntimeError("Request timed out.")
+        return "cloud-gist"
+    calls.fake.responder = responder
+
+    out = summary._summarize_text("transcript", "mi50")
+
+    assert out == "cloud-gist"
+    assert [c["backend"] for c in calls.recorded] == ["mi50", "mi50", "cloud"]
+
+
+def test_no_fallback_when_backend_is_cloud(calls, monkeypatch):
+    _set_key(monkeypatch)
+    calls.fake.responder = lambda backend: (_ for _ in ()).throw(RuntimeError("boom"))
+
+    with pytest.raises(RuntimeError):
+        summary._summarize_text("t", "cloud")
+
+    # Cloud is already the primary: retry it, but never a redundant fallback.
+    assert [c["backend"] for c in calls.recorded] == ["cloud", "cloud"]
+
+
+def test_no_fallback_without_openai_key(calls, monkeypatch):
+    _set_key(monkeypatch, key="")
+    calls.fake.responder = lambda backend: (_ for _ in ()).throw(RuntimeError("mi50 down"))
+
+    with pytest.raises(RuntimeError):
+        summary._summarize_text("t", "mi50")
+
+    assert [c["backend"] for c in calls.recorded] == ["mi50", "mi50"]
+
+
+def test_caps_length_and_timeout_on_every_call(calls, monkeypatch):
+    _set_key(monkeypatch)
+
+    def responder(backend):
+        if backend == "mi50":
+            raise RuntimeError("nope")
+        return "cloud-gist"
+    calls.fake.responder = responder
+
+    summary._summarize_text("t", "mi50")
+
+    assert calls.recorded
+    for c in calls.recorded:
+        assert c["max_tokens"] == summary.SUMMARY_MAX_TOKENS
+        assert c["timeout"] == summary.SUMMARY_TIMEOUT
+
+
+def test_happy_path_uses_primary_only(calls, monkeypatch):
+    _set_key(monkeypatch)
+    calls.fake.responder = lambda backend: "mi50-gist"
+
+    out = summary._summarize_text("t", "mi50")
+
+    assert out == "mi50-gist"
+    assert [c["backend"] for c in calls.recorded] == ["mi50"]  # no retries, no fallback