repo_description: The repo is finally unlocked. enjoy the party! The fastest repo in history to surpass 100K stars ⭐. Join Discord: https://discord.gg/5TUQKqFWd Built in Rust using oh-my-codex.
code: from __future__ import annotations
  
  import json
  from dataclasses import dataclass, field
  from uuid import uuid4
  
  from .commands import build_command_backlog
  from .models import PermissionDenial, UsageSummary
  from .port_manifest import PortManifest, build_port_manifest
  from .session_store import StoredSession, load_session, save_session
  from .tools import build_tool_backlog
  from .transcript import TranscriptStore
  
  
  @dataclass(frozen=True)
  class QueryEngineConfig:
      max_turns: int = 8
      max_budget_tokens: int = 2000
      compact_after_turns: int = 12
      structured_output: bool = False
      structured_retry_limit: int = 2
  
  
  @dataclass(frozen=True)
  class TurnResult:
      prompt: str
      output: str
      matched_commands: tuple[str, ...]
      matched_tools: tuple[str, ...]
      permission_denials: tuple[PermissionDenial, ...]
      usage: UsageSummary
      stop_reason: str
  
  
  @dataclass
  class QueryEnginePort:
      manifest: PortManifest
      config: QueryEngineConfig = field(default_factory=QueryEngineConfig)
      session_id: str = field(default_factory=lambda: uuid4().hex)
      mutable_messages: list[str] = field(default_factory=list)
      permission_denials: list[PermissionDenial] = field(default_factory=list)
      total_usage: UsageSummary = field(default_factory=UsageSummary)
      transcript_store: TranscriptStore = field(default_factory=TranscriptStore)
  
      @classmethod
      def from_workspace(cls) -> 'QueryEnginePort':
          return cls(manifest=build_port_manifest())
  
      @classmethod
      def from_saved_session(cls, session_id: str) -> 'QueryEnginePort':
          stored = load_session(session_id)
          transcript = TranscriptStore(entries=list(stored.messages), flushed=True)
          return cls(
              manifest=build_port_manifest(),
              session_id=stored.session_id,
              mutable_messages=list(stored.messages),
              total_usage=UsageSummary(stored.input_tokens, stored.output_tokens),
              transcript_store=transcript,
          )
  
      def submit_message(
          self,
          prompt: str,
          matched_commands: tuple[str, ...] = (),
          matched_tools: tuple[str, ...] = (),
          denied_tools: tuple[PermissionDenial, ...] = (),
      ) -> TurnResult:
          if len(self.mutable_messages) >= self.config.max_turns:
              output = f'Max turns reached before processing prompt: {prompt}'
              return TurnResult(
                  prompt=prompt,
                  output=output,
                  matched_commands=matched_commands,
                  matched_tools=matched_tools,
                  permission_denials=denied_tools,
                  usage=self.total_usage,
                  stop_reason='max_turns_reached',
              )
  
          summary_lines = [
              f'Prompt: {prompt}',
              f'Matched commands: {", ".join(matched_commands) if matched_commands else "none"}',
              f'Matched tools: {", ".join(matched_tools) if matched_tools else "none"}',
              f'Permission denials: {len(denied_tools)}',
          ]
          output = self._format_output(summary_lines)
          projected_usage = self.total_usage.add_turn(prompt, output)
          stop_reason = 'completed'
          if projected_usage.input_tokens + projected_usage.output_tokens > self.config.max_budget_tokens:
              stop_reason = 'max_budget_reached'
          self.mutable_messages.append(prompt)
          self.transcript_store.append(prompt)
          self.permission_denials.extend(denied_tools)
          self.total_usage = projected_usage
          self.compact_messages_if_needed()
          return TurnResult(
              prompt=prompt,
              output=output,
              matched_commands=matched_commands,
              matched_tools=matched_tools,
              permission_denials=denied_tools,
              usage=self.total_usage,
              stop_reason=stop_reason,
          )
  
      def stream_submit_message(
          self,
          prompt: str,
          matched_commands: tuple[str, ...] = (),
          matched_tools: tuple[str, ...] = (),
          denied_tools: tuple[PermissionDenial, ...] = (),
      ):
          yield {'type': 'message_start', 'session_id': self.session_id, 'prompt': prompt}
          if matched_commands:
              yield {'type': 'command_match', 'commands': matched_commands}
          if matched_tools:
              yield {'type': 'tool_match', 'tools': matched_tools}
          if denied_tools:
              yield {'type': 'permission_denial', 'denials': [denial.tool_name for denial in denied_tools]}
          result = self.submit_message(prompt, matched_commands, matched_tools, denied_tools)
          yield {'type': 'message_delta', 'text': result.output}
          yield {
              'type': 'message_stop',
              'usage': {'input_tokens': result.usage.input_tokens, 'output_tokens': result.usage.output_tokens},
              'stop_reason': result.stop_reason,
              'transcript_size': len(self.transcript_store.entries),
          }
  
      def compact_messages_if_needed(self) -> None:
          if len(self.mutable_messages) > self.config.compact_after_turns:
              self.mutable_messages[:] = self.mutable_messages[-self.config.compact_after_turns :]
          self.transcript_store.compact(self.config.compact_after_turns)
  
      def replay_user_messages(self) -> tuple[str, ...]:
          return self.transcript_store.replay()
  
      def flush_transcript(self) -> None:
          self.transcript_store.flush()
  
      def persist_session(self) -> str:
          self.flush_transcript()
          path = save_session(
              StoredSession(
                  session_id=self.session_id,
                  messages=tuple(self.mutable_messages),
                  input_tokens=self.total_usage.input_tokens,
                  output_tokens=self.total_usage.output_tokens,
              )
          )
          return str(path)
  
      def _format_output(self, summary_lines: list[str]) -> str:
          if self.config.structured_output:
              payload = {
                  'summary': summary_lines,
                  'session_id': self.session_id,
              }
              return self._render_structured_output(payload)
          return '\n'.join(summary_lines)
  
      def _render_structured_output(self, payload: dict[str, object]) -> str:
          last_error: Exception | None = None
          for _ in range(self.config.structured_retry_limit):
              try:
                  return json.dumps(payload, indent=2)
              except (TypeError, ValueError) as exc:  # pragma: no cover - defensive branch
                  last_error = exc
                  payload = {'summary': ['structured output retry'], 'session_id': self.session_id}
          raise RuntimeError('structured output rendering failed') from last_error
  
      def render_summary(self) -> str:
          command_backlog = build_command_backlog()
          tool_backlog = build_tool_backlog()
          sections = [
              '# Python Porting Workspace Summary',
              '',
              self.manifest.to_markdown(),
              '',
              f'Command surface: {len(command_backlog.modules)} mirrored entries',
              *command_backlog.summary_lines()[:10],
              '',
              f'Tool surface: {len(tool_backlog.modules)} mirrored entries',
              *tool_backlog.summary_lines()[:10],
              '',
              f'Session id: {self.session_id}',
              f'Conversation turns stored: {len(self.mutable_messages)}',
              f'Permission denials tracked: {len(self.permission_denials)}',
              f'Usage totals: in={self.total_usage.input_tokens} out={self.total_usage.output_tokens}',
              f'Max turns: {self.config.max_turns}',
              f'Max budget tokens: {self.config.max_budget_tokens}',
              f'Transcript flushed: {self.transcript_store.flushed}',
          ]
          return '\n'.join(sections)
  