Teknium
337 lines
14 KiB
Python
337 lines
14 KiB
Python
"""Host-side ``AIAgent._compress_context`` wrapper.
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Publishes the commit fence ``hard_interrupt()`` reads, runs the compressor on a snapshot under the progress
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timeout, mirrors ``_DB_PERSISTED_MARKER`` stamps back onto the live lists and rebinds the session context.
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Extracted from ``run_agent.py``; every method resolves through ``AIAgent``'s MRO unchanged.
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"""
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import logging
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import copy
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import threading
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from agent.session_activity import ActivityProvenance
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# Same logger name as the origin module so log records / caplog filters are unchanged.
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logger = logging.getLogger("run_agent")
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def _timeout_fallback_prompt(agent, system_message: str) -> str:
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"""Cached prompt, else a fresh build, else the raw ``system_message`` (never raises).
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Resolved lazily by the timeout wrapper: an eager rebuild would raise before
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compress_context runs when ``_cached_system_prompt`` is unset and the builder fails.
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"""
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cached = getattr(agent, "_cached_system_prompt", None)
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if cached:
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return cached
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try:
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return agent._build_system_prompt(system_message)
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except Exception:
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logger.debug("compress_context timeout fallback prompt rebuild failed; using raw system_message", exc_info=True)
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return system_message or ""
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def _report_compression_timeout(
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agent,
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*,
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idle: float,
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waited: float,
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since_progress: float,
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total_ceiling: float,
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total_exhausted: bool,
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progress_observed: bool,
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) -> None:
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"""Host-side timeout bookkeeping: log, activity stamp, cooldown ladder, user warning."""
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from agent.conversation_compression import mark_context_compression_timed_out
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mark_context_compression_timed_out(agent)
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if total_exhausted:
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logger.warning(
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"Context compression reached its total ceiling "
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"after %.1fs (progress observed=%s); continuing "
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"without compression",
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waited,
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progress_observed,
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)
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else:
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logger.warning(
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"Context compression made no progress for %.1fs "
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"(total wait %.1fs, ceiling %.1fs); continuing "
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"without compression",
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since_progress,
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waited,
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total_ceiling,
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)
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touch = getattr(agent, "_touch_activity", None)
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if callable(touch):
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try:
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touch("context compression timed out", provenance=ActivityProvenance.AGENT_COMPRESSION_TIMEOUT)
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except Exception:
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logger.debug("compress_context timeout activity touch failed", exc_info=True)
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# Same timeout cooldown ladder as summary-LLM timeouts: avoid re-burning the
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# full idle budget every turn.
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compressor = getattr(agent, "context_compressor", None)
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record = getattr(compressor, "record_timeout_failure", None) if compressor is not None else None
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if callable(record):
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try:
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record(
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(
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"host compress_context total ceiling exhausted"
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if total_exhausted
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else "host compress_context timeout (no summary progress)"
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),
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failure_kind="ceiling_exhausted" if total_exhausted else "stalled",
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)
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except Exception:
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logger.debug("failed to record compress_context timeout cooldown", exc_info=True)
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emit = getattr(agent, "_emit_warning", None)
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if not callable(emit):
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return
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if total_exhausted:
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progress = " after summary output was observed" if progress_observed else ""
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emit(
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"⚠ Context compression reached its total ceiling "
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f"after {waited:.1f}s{progress}. No messages were "
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"dropped — continuing without compression. Run "
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"/compress to retry or /new for a clean session."
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)
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else:
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emit(
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"⚠ Context compression timed out "
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f"after {idle:.1f}s with no output from the summary "
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"model. No messages were dropped — continuing "
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"without compression. Run /compress to retry, /new "
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"for a clean session, or check "
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"auxiliary.compression."
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)
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def _warn_commit_overrun(agent, waited: float, ceiling: float) -> None:
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"""Commit-phase ceiling breach: the SessionDB mutation must complete, so only surface it."""
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emit = getattr(agent, "_emit_warning", None)
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if callable(emit):
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emit(
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"⚠ Context compression commit is taking unusually "
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f"long ({waited:.0f}s, ceiling {ceiling:.0f}s). "
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"Waiting for it to finish safely — if this persists, "
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"check SessionDB health (disk / lock contention)."
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)
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def _sync_persisted_markers(target_messages, source_messages) -> None:
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"""Mirror ``_DB_PERSISTED_MARKER`` stamps from the worker's snapshot onto a live list.
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Matched by scoped identity; timestamp-less repeated content is ambiguous, so every
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scoped match is stamped. Imported UNCONDITIONALLY: a silent fallback literal would
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split the stamping key from the flush's and resurrect the duplicate-row bug.
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"""
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from agent.context_compressor import _DB_PERSISTED_MARKER
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from agent.conversation_compression import _stamp_scoped_twins
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if not isinstance(target_messages, list) or not isinstance(source_messages, list):
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return
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for source_message in source_messages:
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if isinstance(source_message, dict) and source_message.get(_DB_PERSISTED_MARKER):
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_stamp_scoped_twins(target_messages, source_message)
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def _run_under_progress_timeout(
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agent, run, messages, system_message, *, active_fence, fence_registration_lock, idle_timeout, total_ceiling
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):
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"""Run ``run(fence, target_messages=snapshot)`` on the pool under the progress-aware timeout.
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The pooled worker must NEVER share the caller's live transcript — a late engine after a
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host timeout could rewrite it. It deep-snapshots on the worker and publishes only via an
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ADMITTED commit; a no-op/abort returns the snapshot unchanged, so the ORIGINAL list is
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handed back to keep identity semantics.
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"""
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from agent.conversation_compression import CompressionCommitFence, run_compress_context_with_progress_timeout
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def _snapshot_worker(fence=None):
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snapshot = copy.deepcopy(messages)
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result_msgs, result_prompt = run(fence, target_messages=snapshot)
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if result_msgs is snapshot:
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return messages, result_prompt
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return result_msgs, result_prompt
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timeout_cause = {"total_exhausted": False, "progress_observed": False}
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def _on_timeout_cause(total_exhausted, progress_observed):
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timeout_cause["total_exhausted"] = total_exhausted
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timeout_cause["progress_observed"] = progress_observed
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def _on_timeout(idle, waited, since_progress):
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_report_compression_timeout(
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agent, idle=idle, waited=waited, since_progress=since_progress, total_ceiling=total_ceiling, **timeout_cause
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)
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def _publish_new_fence():
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# The stall-fallback retry needs a fence the aborted attempt cannot veto; publish
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# it on the slot hard_interrupt() reads. The caller's finally restores its fence.
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retry_fence = CompressionCommitFence()
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with fence_registration_lock:
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agent._active_compression_commit_fence = retry_fence
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return retry_fence
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return run_compress_context_with_progress_timeout(
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worker=_snapshot_worker,
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messages=messages,
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system_prompt_fallback=lambda: _timeout_fallback_prompt(agent, system_message),
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idle_timeout_seconds=idle_timeout,
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total_ceiling_seconds=total_ceiling,
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on_timeout=_on_timeout,
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on_timeout_cause=_on_timeout_cause,
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on_commit_overrun=lambda waited, ceiling: _warn_commit_overrun(agent, waited, ceiling),
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fence=active_fence,
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telemetry_agent=agent,
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new_fence=_publish_new_fence,
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)
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def _mirror_result_onto_live_lists(agent, result, messages, *, direct_path: bool) -> None:
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"""Mirror persisted-marker stamps from the result list onto the live list(s)."""
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if not (isinstance(result, tuple) and result and isinstance(result[0], list)):
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return
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result_messages = result[0]
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# Direct-path callers bypass the snapshot worker but still need the post-publish mirror.
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if direct_path or result_messages is not messages:
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_sync_persisted_markers(messages, result_messages)
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session_messages = getattr(agent, "_session_messages", None)
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if isinstance(session_messages, list) and session_messages is not messages:
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# Durable-parent adoption can leave `_session_messages` on the pre-adoption list.
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_sync_persisted_markers(session_messages, result_messages)
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def _rebind_caller_session_context(agent) -> None:
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"""Propagate a rotated session id to the CALLER's thread/ContextVar (idempotent otherwise).
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The worker thread rotated hermes_logging's thread-local id; post-compression tools must
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resolve HERMES_SESSION_ID to the child id.
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"""
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try:
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from hermes_logging import set_session_context
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set_session_context(agent.session_id)
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except Exception:
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pass
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try:
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from gateway.session_context import set_current_session_id
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if agent.session_id:
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set_current_session_id(agent.session_id)
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except Exception:
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logger.debug("post-compression session ContextVar rebind failed", exc_info=True)
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class CompressionFacadeMixin:
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"""``_compress_context`` (see module docstring)."""
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def _compress_context(
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self,
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messages: list,
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system_message: str,
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*,
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approx_tokens: int = None,
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task_id: str = "default",
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focus_topic: str = None,
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force: bool = False,
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bypass_cooldown: bool = False,
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defer_context_engine_notification: bool = False,
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commit_fence=None,
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) -> tuple:
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"""Forwarder — see ``agent.conversation_compression.compress_context``.
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``force=True`` (manual /compress) bypasses the summary-failure cooldown; ``bypass_cooldown=True``
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(provider-proven overflow recovery) runs one real attempt while the cooldown stays armed.
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"""
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# Per-attempt timeout signal for turn-start preflight and in-loop consumers: a stalled
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# compression must not be mistaken for a structural no-op. Thread-local + per-agent lock.
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from agent.conversation_compression import (
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CompressionCommitFence,
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compress_context,
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reset_context_compression_timeout_outcome,
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resolve_context_compression_timeouts,
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)
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reset_context_compression_timeout_outcome(self)
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from agent.portal_tags import (
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get_affinity_scope,
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get_conversation_context,
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reset_affinity_scope,
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reset_conversation_context,
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set_affinity_scope,
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set_conversation_context,
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)
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from agent.prompt_cache_scope import declared_conversation_scope_safe
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# Out-of-turn compaction (/compact, gateway /compress, partial head compression) runs outside
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# run_conversation's ambient scope; publish the root as a fallback so the summarizer's call carries
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# the conversation tag. No-op for in-turn callers. Same for the ROUTING scope when declared.
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token = None
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if get_conversation_context() is None:
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root = self._conversation_root_id()
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if root:
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token = set_conversation_context(root)
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affinity_token = None
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if get_affinity_scope() is None:
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declared = declared_conversation_scope_safe(self)
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if declared:
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affinity_token = set_affinity_scope(declared)
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# Every compression has a fence; hard_interrupt() uses this exact instance to serialize cancel
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# admission against begin_commit(). Publication is serialized so overlapping automatic/manual
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# entrypoints cannot replace the fence of the attempt currently committing.
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active_fence = commit_fence or CompressionCommitFence()
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fence_registration_lock = vars(self).setdefault("_compression_commit_fence_lock", threading.RLock())
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with fence_registration_lock:
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missing_fence = object()
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previous_fence = vars(self).get("_active_compression_commit_fence", missing_fence)
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self._active_compression_commit_fence = active_fence
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try:
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def _run(fence=None, target_messages=None):
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return compress_context(
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self,
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target_messages if target_messages is not None else messages,
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system_message,
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approx_tokens=approx_tokens,
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task_id=task_id,
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focus_topic=focus_topic,
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force=force,
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bypass_cooldown=bypass_cooldown,
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defer_context_engine_notification=(defer_context_engine_notification),
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commit_fence=fence,
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)
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# Callers that already own a progress-aware wait (gateway session
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# hygiene) pass commit_fence and must not be double-wrapped.
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direct_path = commit_fence is not None
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idle_timeout = total_ceiling = None
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if not direct_path:
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idle_timeout, total_ceiling = resolve_context_compression_timeouts()
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if idle_timeout <= 0:
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direct_path = True
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if direct_path:
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result = _run(active_fence)
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else:
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result = _run_under_progress_timeout(
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self, _run, messages, system_message,
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active_fence=active_fence, fence_registration_lock=fence_registration_lock,
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idle_timeout=idle_timeout, total_ceiling=total_ceiling,
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)
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_mirror_result_onto_live_lists(self, result, messages, direct_path=direct_path)
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_rebind_caller_session_context(self)
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return result
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finally:
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with fence_registration_lock:
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if previous_fence is missing_fence:
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vars(self).pop("_active_compression_commit_fence", None)
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else:
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self._active_compression_commit_fence = previous_fence
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# Restore whatever the caller had, so a compaction never leaks its
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# tag into the surrounding scope.
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if token is not None:
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reset_conversation_context(token)
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if affinity_token is not None:
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reset_affinity_scope(affinity_token)
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