367 lines
14 KiB
Python
367 lines
14 KiB
Python
"""Pipeline building blocks: agent races (with grace), single-slot, schemas, prompts, guide status.
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Holds the mutable pipeline state (generation semaphore, cancel set).
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Access the cancel set ONLY through the functions here — copied references
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in other modules would diverge on a re-assign.
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"""
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import asyncio
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import logging
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from dataclasses import dataclass
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from datetime import datetime, timezone
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from typing import Callable
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from agents import run_agent, kill_process, cancel_scope, clear_scope
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from config import MAX_CONCURRENT_GENERATIONS, TEMPLATES_DIR, TIMEOUTS
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from database import update_guide
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log = logging.getLogger("creator.pipeline")
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_semaphore = asyncio.Semaphore(MAX_CONCURRENT_GENERATIONS)
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_cancelled: set[str] = set()
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async def cancel_guide(guide_id: str) -> bool:
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_cancelled.add(guide_id)
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cancel_scope(f"{guide_id}-") # waiting agents bail before spawn
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kill_process(guide_id) # kill running subprocesses
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now = datetime.now(timezone.utc).isoformat()
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await update_guide(guide_id, status="error", progress=None, error_msg="Cancelled — progress is preserved", updated_at=now)
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return True
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def is_guide_cancelled(guide_id: str) -> bool:
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return guide_id in _cancelled
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def clear_guide_cancelled(guide_id: str) -> None:
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_cancelled.discard(guide_id)
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clear_scope(f"{guide_id}-") # clear scope → restart not blocked
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async def _set_progress(guide_id: str, progress: str) -> None:
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now = datetime.now(timezone.utc).isoformat()
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await update_guide(guide_id, progress=progress, updated_at=now)
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async def _set_step(guide_id: str, step: int, progress: str) -> None:
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now = datetime.now(timezone.utc).isoformat()
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await update_guide(guide_id, step=step, progress=progress, updated_at=now)
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async def _fail(guide_id: str, msg: str) -> None:
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now = datetime.now(timezone.utc).isoformat()
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await update_guide(guide_id, status="error", progress=None, error_msg=msg, updated_at=now)
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def _prompt(name: str, **kwargs) -> str:
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template = (TEMPLATES_DIR / "Prompt" / f"{name}.md").read_text(encoding="utf-8")
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return template.format(**kwargs)
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def _extra(instructions: str) -> str:
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return f"\n\nADDITIONAL INSTRUCTIONS FROM THE USER:\n{instructions}\n" if instructions else ""
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def _log(topic: str, msg: str) -> None:
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log.info("[%s] %s", topic, msg)
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def _claude_error(label: str, returncode: int, stdout: str, stderr: str) -> str:
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stderr = (stderr or "").strip()
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if stderr:
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return f"{label}: {stderr[:1000]}"
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tail = (stdout or "").strip()[-500:]
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if tail:
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return f"{label} (exit {returncode}, stderr empty): …{tail}"
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return f"{label} (exit {returncode}, no output)"
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_INFRA_MARKERS = ("HTTP 429", "HTTP 5", "rate_limit", "Timeout after",
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"ConnectError", "ConnectTimeout", "ReadError", "RemoteProtocolError")
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def _is_infra(err: str) -> bool:
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"""Transport-/Infra-Fehler (retry + pause) statt inhaltlichem Fehlschlag."""
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return any(m in (err or "") for m in _INFRA_MARKERS)
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def _gather_error(label: str, results: list) -> str:
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for r in results:
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if isinstance(r, BaseException):
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return f"{label}: {type(r).__name__}: {r}"
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returncode, stdout, stderr = r
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if returncode != 0:
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return _claude_error(label, returncode, stdout, stderr)
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return f"{label}: no usable result"
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def _timeout(step: str, n: int = 0) -> int:
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base, per = TIMEOUTS[step]
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return base + per * n
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def _problems_schema(data):
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"""{"ok": true} → [] · {"problems": [str]} → list · else None."""
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if not isinstance(data, dict):
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return None
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if data.get("ok") is True:
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return []
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p = data.get("problems")
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if not isinstance(p, list) or not p:
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return None
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out = [str(x).strip() for x in p if str(x).strip()]
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return out or None
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def _str_list(val) -> list[str] | None:
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"""List of non-empty strings → stripped list (empty allowed) · else None."""
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if not isinstance(val, list) or not all(isinstance(x, str) for x in val):
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return None
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out = [x.strip() for x in val]
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return None if any(not x for x in out) else out
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def _runde_schema(data, final: bool = False):
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"""{"keep": [str], "rest": [str]} → (include, rest) · else None.
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final=True: last clarification round — a non-empty rest is invalid.
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"""
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if not isinstance(data, dict):
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return None
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include = _str_list(data.get("keep"))
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rest = _str_list(data.get("rest"))
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if include is None or rest is None or (final and rest):
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return None
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return include, rest
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_YESNO = ("ja", "nein")
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def _enum_map_schema(key: str, allowed):
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"""Factory for `{"<key>": {"1": value, …}}` → `{id: value}` parsers; value ∈ `allowed`
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(casefolded). If `ids` are given, at least these must be covered (extras allowed). None
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on any invalid id/value or wrong shape. The caller filters the result to `ids`."""
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def parse(data, ids: set[int] | None = None):
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if not isinstance(data, dict) or not isinstance(data.get(key), dict) or not data[key]:
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return None
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out: dict[int, str] = {}
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for k, v in data[key].items():
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try:
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num = int(k)
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except (ValueError, TypeError):
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return None
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value = str(v).strip().casefold()
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if value not in allowed:
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return None
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out[num] = value
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if ids is not None and not ids <= set(out):
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return None
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return out
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return parse
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_yesno_schema = _enum_map_schema("relevant", _YESNO) # triage gate ∈ ja/nein
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from config import (MAX_RESTARTS as _MAX_RESTARTS, HEDGE_NACH_S as _HEDGE_NACH_S, # noqa: E402 — zentral tunebar
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INFRA_MAX_RETRIES as _INFRA_MAX_RETRIES, INFRA_BACKOFF_BASE as _INFRA_BACKOFF)
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async def _race(topic: str, label: str, slots: list[dict], quorum: int, timeout: int, provider: str, cancelled=None, *, grace: int | None = None) -> list | None:
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"""Starts all slots in parallel and collects `quorum` valid results.
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Slot spec: {key, prompt, role, capabilities, payload}. `payload(result)`
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checks validity and returns the slot result or None.
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Error/timeout/invalid → slot restart (max. _MAX_RESTARTS). As soon as the
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quorum stands, the remaining agents are killed. None = quorum missed.
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`cancelled()` → True aborts (no restarts, returns None).
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With `grace`, `quorum` becomes the minimum: the first valid result starts
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a timer of `grace` seconds. After it expires, running agents are only
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killed if the minimum stands — otherwise the race, including restarts,
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keeps running until it stands. Returns: `quorum` to `len(slots)` results.
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"""
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attempts = {i: 0 for i in range(len(slots))}
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infra_attempts = {i: 0 for i in range(len(slots))}
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infra_erschoepft: set[int] = set()
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tasks: dict[asyncio.Task, int] = {}
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keys: dict[asyncio.Task, str] = {}
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born: dict[asyncio.Task, float] = {}
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hedged: set[int] = set() # slot got its one twin — no hedge cascades
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fertig: set[int] = set() # slot delivered a valid result (late twins are ignored)
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# Hedge-Schwelle relativ zum Call-Timeout (HEDGE_NACH_S = Untergrenze): pauschale 90 s
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# hedgten jeden gesunden langen Call — z. B. Guide-Fixes, die normal 110–135 s laufen.
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hedge_s = max(_HEDGE_NACH_S, timeout / 2) if _HEDGE_NACH_S else 0
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loop = asyncio.get_running_loop()
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deadline: float | None = None
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def spawn(i: int, suffix: str = "") -> None:
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slot = slots[i]
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lbl = slot.get("label") or (label if len(slots) == 1 else f"{label} {i + 1}")
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key = slot["key"] + suffix
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task = asyncio.create_task(run_agent(
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key, slot["prompt"], timeout,
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provider=provider, role=slot["role"], capabilities=slot["capabilities"],
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scope=topic, on_line=slot.get("on_line"), label=lbl,
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))
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tasks[task] = i
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keys[task] = key
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born[task] = loop.time()
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for i in range(len(slots)):
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spawn(i)
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results: list = []
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try:
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while tasks:
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if cancelled and cancelled():
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return None
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if deadline is not None and len(results) >= quorum and loop.time() >= deadline:
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return results
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# Hedge: a slot running HEDGE_NACH_S without result gets ONE parallel twin
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# (key -h) — first valid result wins. Stalled provider calls burned the full
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# timeout cap before the restart even began (measured: 160–230 s per stall).
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if hedge_s:
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now = loop.time()
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for t in [t for t in list(tasks) if tasks[t] not in hedged | fertig
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and now - born[t] >= hedge_s]:
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i = tasks[t]
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hedged.add(i)
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spawn(i, suffix="-h")
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_log(topic, f"{label} {i + 1}: {round(hedge_s)}s ohne Ergebnis — Hedge-Zwilling gestartet")
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# Wake up for the earliest relevant deadline (grace or next hedge).
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waits = []
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if deadline is not None and len(results) >= quorum:
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waits.append(deadline - loop.time())
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if hedge_s:
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naechste = [born[t] + hedge_s - loop.time() for t in tasks
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if tasks[t] not in hedged | fertig]
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if naechste:
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waits.append(max(0.0, min(naechste)))
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wait_timeout = max(0.0, min(waits)) if waits else None
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done, _ = await asyncio.wait(tasks.keys(), return_when=asyncio.FIRST_COMPLETED, timeout=wait_timeout)
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if not done:
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continue
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for task in done:
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i = tasks.pop(task)
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keys.pop(task, None)
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born.pop(task, None)
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if i in fertig:
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continue # späte Zwillinge eines bereits gewerteten Slots
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payload, err = None, None
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try:
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result = task.result()
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if result[0] != 0:
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err = _claude_error("Error", *result)
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else:
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payload = slots[i]["payload"](result)
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if payload is None:
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err = "result invalid/not parseable"
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except asyncio.TimeoutError:
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err = f"Timeout after {timeout}s"
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except Exception as e:
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err = f"{type(e).__name__}: {e}"
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if payload is not None:
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results.append(payload)
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fertig.add(i)
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for t2 in [t2 for t2, i2 in tasks.items() if i2 == i]: # Zwilling killen
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kill_process(keys.get(t2, slots[i]["key"]))
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t2.cancel()
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if grace is not None and deadline is None:
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deadline = loop.time() + grace
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_log(topic, f"{label}: first result — grace {grace}s running")
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if len(results) >= quorum and (grace is None or loop.time() >= deadline):
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return results
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continue
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infra = _is_infra(err)
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_log(topic, f"{label} {i + 1} (attempt {attempts[i] + 1}{' infra' if infra else ''}): {err}")
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attempts[i] += 1
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# If the minimum already stands, restarts are pointless — the restart
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# would be killed at the grace end anyway. A still-running twin IS the retry.
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enough = grace is not None and len(results) >= quorum
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zwilling = any(i2 == i for i2 in tasks.values())
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if enough or zwilling or (cancelled and cancelled()):
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continue
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if infra:
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# 429/Timeout/Netz: eigener Zähler + wachsende Pause, dann Eskalation
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infra_attempts[i] += 1
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if infra_attempts[i] > _INFRA_MAX_RETRIES:
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infra_erschoepft.add(i) # kein Respawn → raise am Quorum-Miss
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continue
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await asyncio.sleep(_INFRA_BACKOFF * 2 ** (infra_attempts[i] - 1))
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spawn(i)
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elif attempts[i] <= _MAX_RESTARTS:
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spawn(i)
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if len(results) >= quorum: # all slots done, minimum stands (only reachable with grace)
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return results
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_log(topic, f"{label}: quorum {quorum} not reached ({len(results)} valid)")
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if infra_erschoepft:
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raise AgentInfraError(
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f"{label}: {len(infra_erschoepft)} Slot(s) nach {_INFRA_MAX_RETRIES} "
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"Infra-Retries erschöpft (429/Timeout)")
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return None
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finally:
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for task, i in tasks.items():
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kill_process(keys.get(task, slots[i]["key"]))
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task.cancel()
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if tasks:
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await asyncio.gather(*tasks.keys(), return_exceptions=True)
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@dataclass
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class GenContext:
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"""Pipeline parameters passed through — saves long argument signatures."""
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topic: str
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provider: str
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is_cancelled: Callable[[], bool]
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guide_id: str | None = None
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# Result status of run_single_slot
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OK, CANCELLED, FAILED = "ok", "cancelled", "failed"
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class AgentInfraError(Exception):
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"""Slot nach Infra-Retries erschöpft (429/Timeout). KEIN inhaltliches Urteil —
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der Aufrufer pausiert den Lauf, nie fail-open."""
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async def run_single_slot(
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ctx: GenContext, label: str, *,
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key: str, prompt: str, role: str, capabilities: str, payload, timeout: int, on_line=None,
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) -> tuple[str, object]:
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"""One agent, one valid result (race with quorum 1).
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→ (OK, value) | (CANCELLED, None) | (FAILED, None)
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"""
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slots = [{"key": key, "prompt": prompt, "role": role, "capabilities": capabilities, "payload": payload, "on_line": on_line}]
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res = await _race(ctx.topic, label, slots, 1, timeout, ctx.provider, cancelled=ctx.is_cancelled)
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if ctx.is_cancelled():
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return CANCELLED, None
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if res is None:
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return FAILED, None
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return OK, res[0]
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async def _gather_progress(coros, total, report, start=0):
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"""Runs `coros` concurrently and reports live progress: `await report(done, total)`
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after each completion (and once initially). Results in order, return_exceptions=True."""
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done = start
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async def wrap(c):
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nonlocal done
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try:
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return await c
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finally:
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done += 1
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await report(done, total)
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await report(done, total)
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return await asyncio.gather(*[wrap(c) for c in coros], return_exceptions=True)
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