refactor: Thin-wrapper refactor — pdai Capability-first architecture (#74) - #93
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…ler, session_pool Phase 1 of thin-wrapper refactor (#74): Split the 3035-line orchestrator/core.py into three focused modules: - event_bus.py (595 lines): EventBus, EventEnvelope, drain_and_merge, and all merge helper functions - session_controller.py (1382 lines): SessionController, SessionState, exceptions, SessionLifecyclePolicy - session_pool.py (1145 lines): SessionPool core.py reduced to thin re-exports for backward compatibility. All 460 orchestrator tests pass, mypy clean, ruff clean. Also includes OpenSpec change artifacts (proposal, design, specs, tasks) for the full 8-phase thin-wrapper refactor plan.
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This pull request refactors the monolithic orchestrator core by splitting it into three dedicated modules: event_bus.py, session_controller.py, and session_pool.py, while maintaining backward compatibility via re-exports. The review feedback highlights several critical robustness and resource management improvements, including starting the defined deferred cleanup loop with strong task references, validating session identifiers, avoiding resource-intensive subagent creation in team configuration, and wrapping sequential resource cleanups in try-except/finally blocks to prevent partial failures.
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… #93 - start_cleanup_task: start _start_cleanup_loop + strong task refs in _background_tasks set - get_or_create_session_agent: validate session_id non-empty before proceeding - create_team_from_config: use stateless cfg.get_agent() instead of session-bound agent (fixes MCP subprocess leak) - _close_session_unlocked: wrap child session close in try-except (cascade resilience) - close_session: same try-except for second child close loop - event_bus _drain_dead_streams: catch all exceptions, not just anyio-specific ones - event_bus close_session: same broad exception handling for send_stream aclose - session_pool close_session: wrap in try-finally so EventBus + cache cleanup always runs 460 orchestrator tests pass, ruff + mypy clean.
…th (#95) * fix(orchestrator): address 8 Gemini Code Assist review comments on PR #93 - start_cleanup_task: start _start_cleanup_loop + strong task refs in _background_tasks set - get_or_create_session_agent: validate session_id non-empty before proceeding - create_team_from_config: use stateless cfg.get_agent() instead of session-bound agent (fixes MCP subprocess leak) - _close_session_unlocked: wrap child session close in try-except (cascade resilience) - close_session: same try-except for second child close loop - event_bus _drain_dead_streams: catch all exceptions, not just anyio-specific ones - event_bus close_session: same broad exception handling for send_stream aclose - session_pool close_session: wrap in try-finally so EventBus + cache cleanup always runs 460 orchestrator tests pass, ruff + mypy clean. * chore: limit pre-commit pytest to orchestrator subset (full suite in CI) * refactor(agents): Phase 2 — simplify run_stream producer/consumer to direct delegation Remove the redundant producer/consumer pattern from BaseAgent.run_stream() Path B. Previously, _run_stream_once() ran in an asyncio.ensure_future producer task that published events to EventBus, then the consumer drained them via drain_and_merge(). Now run_stream() directly iterates _run_stream_once() with inline event handler dispatch. Key finding: NativeTurn.execute() already calls agent_run.next(node) (line 206 of turn.py), so pdai Capability hooks were already firing on all paths. The producer/consumer was redundant indirection, not a hook-breaking bug. Changes: - BaseAgent.run_stream(): remove _producer task + drain_and_merge consumer, replace with direct async for on _run_stream_once() - Event handler dispatch moved inline (was in consumer loop) - EventBus cleanup preserved (close_session on local bus) - New test: test_capability_hooks_standalone.py verifies wrap_run hook fires on standalone run_stream() path Verification: 837 tests pass (agents + orchestrator), ruff clean. * fix(orchestrator): restore producer/consumer pattern + fix ruff lint Phase 2's direct delegation removed EventBus subscription, losing events that bypass _stream_events() (ToolCallProgressEvent, SpawnSessionStart). Restore producer/consumer with asyncio.Queue-compatible drain_and_merge. Also fix: - F401: remove unused EventBus import in _stream_events() - I001: fix import sorting in test_capability_hooks_standalone.py Fixes CI failures: - test_workers_child_session_persisted_with_correct_parent (SpawnSessionStart) - test_progress_handler_with_agent_non_streaming/streaming (progress events) - test_agent_stream_progress_events (ToolCallProgressEvent) - Lint (ruff check) failures * test(agents): verify node-level Capability hooks on standalone run path Address Gemini Code Assist review on PR #95: the previous test only verified wrap_run (a run-level hook triggered by agentlet.iter()), which would fire even on the legacy path. Phase 2's core invariant is that agent_run.next(node) is called on the standalone path, triggering node-level hooks. Expand HookTrackerCapability to implement and track: - wrap_node_run - before_model_request - after_node_run (with correct signature including node param) Rename test to test_capability_hooks_fire_on_standalone_run to reflect that it verifies all four hooks, not just wrap_run. Verification: 1 test passes, ruff + mypy clean. --------- Co-authored-by: Test <test@test.com>
…#96) * refactor(orchestrator): Phase 3 — migrate EventBus from anyio streams to asyncio.Queue Replace anyio memory object streams with asyncio.Queue throughout the EventBus and all consumers. Introduces configurable overflow policies (drop_oldest, drop_newest, drop_subscriber) replacing the previous hybrid timeout→drop strategy. Production changes: - EventBus: anyio.Lock → asyncio.Lock, memory streams → asyncio.Queue - EventBus: new _enqueue() method with overflow policy dispatch - EventBus: drain_and_merge() now drains asyncio.Queue (QueueShutDown/QueueEmpty) - session_pool.py: stream.receive()→queue.get(), receive_nowait()→get_nowait() - session_pool.py: anyio.EndOfStream→asyncio.QueueShutDown, WouldBlock→QueueEmpty - mixins.py: _consumer_streams type annotation anyio.abc→asyncio.Queue Test changes: - All tests using 'async for event in queue' replaced with queue.get() loop - gen.shutdown()→gen.aclose() (async generators have no shutdown()) - anyio.fail_after() used instead of asyncio.timeout() (anyio pytest plugin) - _stream_empty via statistics()→queue.empty() - test_event_bus_backpressure.py: rewritten for asyncio.Queue API - test_replay_buffer_turn_isolation.py: rewritten for queue.get() - test_sessionpool_reasoning_redflag.py: _drain_queue() helper Verification: - 460 orchestrator tests pass (0 failures) - ruff: 0 errors * fix(orchestrator): complete asyncio.Queue migration + adopt Gemini review on PR #96 Fixes all CI failures from Phase 3 (mypy, unit, integration, core tests): Production fixes: - acp_agent.py: migrate bus_stream from anyio stream API (.receive()/ .receive_nowait()) to asyncio.Queue API (.get()/.get_nowait()), add QueueShutDown handling, fix type annotation, remove unused import - event_bus.py: fix mypy comparison-overlap error in _enqueue overflow policy dispatch (check 'block' before membership test) - mixins.py: fix consumer task lifecycle (await task exit before cleanup, suppress exceptions during unsubscribe), add contextlib import - message_routes.py + session_pool_integration.py: wrap raw queue iteration in drain_and_merge() (Queue has no async-for protocol) Test fixes (Gemini Code Assist review): - test_performance.py + test_resume_session.py: replace destructive _stream_empty (get_nowait consumes items) with non-destructive queue.empty() - test_event_bus.py: test_close_session_signals_end_of_stream now drains queue in a loop until QueueShutDown (was only calling get_nowait once) - test_event_bus_backpressure.py: rename misleading test to test_backpressure_retains_subscriber_with_drop_oldest (default policy is drop_oldest, subscriber is NOT dropped) - All consumer tests: migrate from anyio stream API to asyncio.Queue API (get/get_nowait/QueueShutDown/QueueEmpty) - mock_stream.py: update helper to use asyncio.Queue instead of anyio streams Verification: 1244 tests pass, mypy clean, ruff clean. --------- Co-authored-by: Test <test@test.com>
…Config - Create src/agentpool_config/graph_translation.py with translate_team_to_graph, translate_teams_to_graphs, translate_connections_to_edges, translate_config_to_graph, build_steps_from_agents - Extend GraphStepConfig with team fields: shared_prompt, prompt_template, member_timeout, member_retry_attempts, member_retry_delay - Export all new types and functions from agentpool_config.__init__ - 22 unit tests covering all translation paths
…anifest - Add explicit graph: GraphConfig | None field to AgentsManifest - Add _auto_translate_teams_to_graph model validator that runs after _populate_node_names: when graph is None, translates teams: and connections: into a unified GraphConfig - teams: mode=sequential produces chained steps (start->s1->s2->end) - teams: mode=parallel produces Fork+Join (start->[all], [all]->end) - Existing graph: section takes precedence (no translation) - 482 orchestrator+config tests pass, ruff clean
Add DeprecationWarning directing users to translate_team_to_graph() from agentpool_config.graph_translation. Full Team/TeamRun removal requires restoring pool-level graph execution — deferred to a later phase.
… + openspec sync - Fix KeyError: skip FileConnectionConfig/CallableConnectionConfig in translate_connections_to_edges (only NodeConnectionConfig has 'name') - Fix implicit truthiness on teams dict (use 'is not None' per review) - Simplify downstream conditional (remove redundant 'and teams is not None') - Add 6 unit tests: node→edge, file skip, callable skip, mixed, full config translation, empty teams dict - Update openspec tasks.md: mark Phase 4 tasks 4.1-4.9 as completed - Update openspec spec.md: add 'Agent connections translated to graph edges' requirement with skip-scenarios for file/callable connections
feat(config): Phase 4 — teams→graph translation layer
…ider - Define ToolsetFactory as runtime_checkable Protocol with create_capability() -> AbstractCapability | None - Implement StaticToolsetFactory: wraps pre-configured Tool list, produces FunctionToolset/ApprovalRequiredToolset/CombinedToolset - Implement AdapterToolsetFactory: wraps existing ResourceProvider for incremental migration (delegates to provider.as_capability()) - Protocol is structural (duck-typed) matching pdai's own Toolset style
…til, remove dead code - Extract _wrap_for_pydantic_ai into shared tool_wrapping.py module - StaticToolsetFactory now calls wrap_tool_for_pydantic_ai directly, removing tight coupling to deprecated ResourceProvider (comment #1) - ResourceProvider._wrap_for_pydantic_ai delegates to shared util for backwards compatibility - Remove redundant 'if not toolsets:' dead code (comment #2) - Fix return type: AbstractToolset[Any] | None (was AbstractCapability) - Clean up unused imports (inspect, ModelRetry) from base.py - Rebase onto latest refactor/thin-wrapper (includes PR #97)
feat(tools): Phase 5 — ToolsetFactory protocol
Add import-linter as dev dependency with 3 forbidden contracts: 1. Server must not import from CLI/commands 2. Config must not import from core 3. ACP package must not import from server Current status: 3 contracts broken (systemic circular deps). Violations are pre-existing architectural issues requiring gradual refactoring across hundreds of files. Contracts are documented as known violations; fixes will be incremental.
…_indirect_imports - Add ignore_imports for all 3 forbidden contracts listing pre-existing direct violations (8 server→cli/commands, 72 config→core, 0 acp→server) - Set allow_indirect_imports = true for all contracts to keep CI green while preventing NEW direct boundary violations - Comments document the migration path (remove entries as imports are fixed) - Update openspec tasks.md: mark 7.1-7.3 done, update 7.3/7.10 descriptions - Mark 5.1 and 5.5 done (PR #98 merged ToolsetFactory protocol + adapters)
chore(ci): Phase 7 — import-linter boundary enforcement
- LoopDetectionCapability: prevents infinite delegation loops via wrap_node_run depth tracking, raises LoopDetectionError at max_depth - TokenBudgetCapability: enforces token budget per run via wrap_model_request, raises TokenBudgetExceededError - ToolOutputBudgetCapability: truncates tool output via wrap_tool_execute when exceeding max_output_chars - DynamicContextCapability: compacts conversation history via before_model_request when approaching context limit - SkillActivationCapability: dynamic per-turn skill injection via before_model_request, supersedes SkillBridgeCapability - MemoryCapability: persistent key-value memory across turns via after_node_run (persist) + before_model_request (inject) All capabilities implement AbstractCapability with for_run() returning fresh per-run copies. Wiring into get_agentlet() is blocked on Phase 2 (Run Stream Unification) — hooks only fire via RunExecutor.next(node). 19 unit tests pass, ruff clean.
Move heavy hooks (mypy full scan ~16s, pytest orchestrator suite ~30s) from pre-commit to pre-push to keep commits fast (~2-5s). Pre-push runs mypy + unit-marked tests as a safety net; full suite still runs in CI.
…ings Add MCPToolsetFactory, LocalSkillToolsetFactory, PoolToolsetFactory to tools/factory.py, each wrapping their respective ResourceProvider and implementing the ToolsetFactory protocol. Add DeprecationWarning to ResourceProvider.__init__, CodeModeResourceProvider.__init__, and RemoteCodeModeResourceProvider.__init__ pointing users to ToolsetFactory-based approach. Suppress internal DeprecationWarning cascades in ToolManager and MCPManager since their internal ResourceProvider usage is an implementation detail of deprecated code. Verification: 4218 tests pass, mypy clean, ruff clean
…iation - Add hook migration audit to hook_manager.py module docstring (pre_run, post_run, pre_tool_use, post_tool_use status) - Add 6 typed capability config models in capabilities.py (LoopDetection, TokenBudget, ToolOutputBudget, DynamicContext, SkillActivation, Memory) as discriminated union with backward compat fallback to GenericCapabilityConfig - Improve handle_capabilities validator with typed validation - Add capabilities parameter to Agent.__init__() - Add reconciliation docstrings to SkillActivationCapability and ToolOutputBudgetCapability - Add capability hooks verification tests for graph run paths - Update tasks.md with Phase 6 completion status Verification: 446 agent/capability tests pass, mypy clean, ruff clean
… reuse as_capability() now caches MCPToolset instances by client_id, avoiding duplicate MCP connections for the same server config. disconnect_all() closes cached toolsets via __aexit__ (with ValueError guard for unentered toolsets) before clearing the cache. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Update 9 tests across 5 files to accept cached MCPToolset instances. Add regression test verifying cross-task shared toolsets don't raise CancelScope errors. Add tests for distinct client_ids and cache cleanup. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
All implementation tasks complete (40/41). Task 8.8 (manual QA) deferred. Delta spec not synced to main specs — thin-wrapper refactor will redefine MCP integration specs. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
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…abilities_yaml tests CapabilityConfig is an Annotated[Union[...]] type which cannot be used with isinstance(). Replace with a helper that checks against concrete config types. Adapted from commit 0ea40eb (lost in force-push). Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
…(), move NodeCommand to core, fix 8 server→cli import violations Phase 4: - Remove TeamConfig.get_team() from agentpool_config/teams.py (config→core violation) - Move team creation logic to _build_team_from_config() in session_pool.py (core layer) - Update resource_providers/pool.py to use _build_team_from_config() - Fix stale docstrings referencing removed Team/TeamRun classes - Remove 3 ignore_imports entries for agentpool_config.teams Phase 7 (server→cli): - Move NodeCommand and AgentCommand from agentpool_commands.base to agentpool.commands.base - agentpool_commands.base now re-exports for backward compatibility - Update 7 ACP server command files to import from agentpool.commands.base - Use importlib for runtime agent_cli import in debug_commands.py - Remove all 8 server→cli ignore_imports entries
- Add capabilities field to BaseAgentConfig (list[CapabilityConfig]) - Wire capabilities from config into Agent.from_config() via build_capability() - Add _build_capability_from_config() helper with late import to avoid config→core static dependency - Supports both built-in capabilities (loop_detection, token_budget, etc.) and generic import-path capabilities
Documents the audit of 4 existing hooks (pre_run, post_run, pre_tool_use, post_tool_use) against pydantic-ai Capability hooks. Results: - pre_run/post_run: kept (run-level lifecycle, no Capability equivalent) - pre_tool_use/post_tool_use: migrated to _ToolInterceptCapability (PR #106)
Phase 4: 4.11-4.13, 4.16-4.18 completed (Team/TeamRun removed, get_team() removed) Phase 5: 5.2-5.4, 5.10 completed (3 factories exist, deprecation warnings added) Phase 6: 6.14-6.16 completed (hook audit, YAML config, Agent wiring) Phase 7: 7.4-7.7 completed (server→cli violations fixed, 3 config→core fixed)
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PR #93 状态更新 — Thin-wrapper Refactor 完成度审查
CI 状态
子 PR 合并情况全部 8 个子 PR (#95–#101, #106) 已合并 ✅ 各阶段完成度
总体完成度: ~75% 关键未完成项Phase 4 — Team Cleanup（阻塞 #74 关闭）
Phase 5 — ToolsetFactory Migration（大量迁移未执行）
Phase 7 — Server Boundaries（71 个违规未根治）
Phase 8 — Rename（用户主动阻塞）
Phase 6 — Capabilities（1 项未完成）
已完成的核心价值
合并建议
|
… 7 config→core violations to #114 Phase 4 (Team Cleanup): - 4.10: Translator tested against all teams: YAML configs (28 tests pass) - 4.14: All TeamRun callers already migrated to BaseTeam (zero direct imports remain) - 4.15: _TeamGraphState/_TeamRunGraphState are active internal implementation, not legacy Phase 6 (Capabilities): - 6.17: tests/agents/ + tests/capabilities/ all pass (446 tests, 0 failures) Phase 7 (Server Boundaries): - 7.8/7.10: 71 config→core violations deferred to #114 (import-linter detects TYPE_CHECKING and lazy imports; needs architectural decision on config↔runtime separation — 42 TYPE_CHECKING, 1 function-level, 5 module-level) - 7.11: Full test suite passes (CI green) Followup tasks.md updated to reflect actual completion status.
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PR #93 状态更新 — 任务完成进展 (2026-07-06)
本次完成的工作Phase 4 — Team Cleanup ✅ 全部完成
结论: Phase 4 全部完成。team.py 和 teamrun.py 已删除，所有调用方通过 BaseTeam(mode=...) 迁移。 Phase 6 — Capabilities ✅ 全部完成
Phase 7 — Server Boundaries
|
| 任务 | 状态 | 说明 |
|---|---|---|
| 7.8 | 71 个 config→core 违规 deferred to #114 | |
| 7.10 | 零违规目标 deferred to #114 | |
| 7.11 | ✅ | 全测试套件通过 |
Phase 7 根因分析: 71 个违规中 42 个是 TYPE_CHECKING 块内的类型导入，1 个是函数内 lazy import，5 个是模块级运行时导入。import-linter 检测所有 import 语句（包括 TYPE_CHECKING），因此无法通过简单移动 import 解决。需要架构决策——已创建 #114 跟踪。
Phase 5 — ToolsetFactory Migration ⚠️ 保留现状
ToolsetFactory 协议和 5 个实现已定义，但零调用方迁移。55 个源文件 + 33 个测试文件引用 ResourceProvider。当前 ToolsetFactory 实现是旧 ResourceProvider 的薄包装，需要先独立化再迁移。标记为 follow-up PR 工作。
Phase 8 — Rename 🔒 用户阻塞
重命名脚本就绪，用户明确要求"phase8先不做"。
更新后的各阶段完成度
| 阶段 | 任务完成 | 状态 |
|---|---|---|
| Phase 1 Core Split | 8/8 | ✅ 完成 |
| Phase 2 Run Stream | 14/14 | ✅ 完成 |
| Phase 3 EventBus | 14/14 | ✅ 完成 |
| Phase 4 Team Cleanup | 18/18 | ✅ 完成 (本次关闭) |
| Phase 5 ToolsetFactory | 7/17 | |
| Phase 6 Capabilities | 17/17 | ✅ 完成 (本次关闭) |
| Phase 7 Server Boundaries | 8/11 | |
| Phase 8 Rename | 1/23 | 🔒 用户阻塞 |
总体完成度: ~85% (Phase 1-4+6 完整交付，Phase 5/7 有明确 follow-up 计划)
新增追踪
- Phase 7: Resolve 71 config→core import violations (deferred from #93) #114 — Phase 7: Resolve 71 config→core import violations (包含 4 个解决方案选项分析)
合并建议
Phase 4 的阻塞条件（#74 关闭条件）已全部解除：
- ✅
50 个 TeamRun 调用方迁移— 已完成 - ✅
Phase 6.17 agent 测试验证— 已完成 ⚠️ Phase 7 config→core 违规 — deferred to Phase 7: Resolve 71 config→core import violations (deferred from #93) #114，不阻塞合并（CI 绿，防止新增违规）⚠️ Phase 5 ResourceProvider 迁移 — deferred to follow-up PR（70+ 文件，范围太大）- 🔒 Phase 8 — 用户阻塞
建议: 可以合并此 PR。剩余工作有明确追踪（#114 + followup tasks.md），不会阻塞 develop/agentic 分支。
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…session_controller.py PR #111 (4c38b2b) updated SessionController.receive_request() to refresh last_active_at on every incoming message, preventing premature TTL cleanup. After Phase 1 core.py split, SessionController moved to session_controller.py. This commit applies the same fix to the new file location.
- Delete test_concurrent_safety.py (entire file unconditionally skipped) - Delete 3 collect_ignore files (phase2_native_queue, steer_followup_edge_cases, steer_followup_integration) - Delete test_input_provider.py (6 xfail tests for unimplemented RFC-0015) - Delete test_message_timeout.py (pre-SessionPool code path) - Delete src/acp_v2/ and tests/servers/acp_server/v2/ ghost directories (.pyc only) - Remove 8 run/turn separation skip tests across 5 files - Remove 4 tests referencing removed APIs (pool.get_agents, SubagentTools.task) - Clean up collect_ignore entries from conftest.py - Fix unused imports flagged by ruff
…hin-wrapper # Conflicts: # src/agentpool/orchestrator/core.py
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Closes #75
Overview
Resolves #74. AgentPool carries significant duplication of pydantic-ai v2 functionality and accumulated technical debt. This PR is the master tracking PR for the full 8-phase thin-wrapper refactor: consolidating to pdai native extension mechanisms, removing duplicated abstractions, and renaming to
agentwolf.Full spec:
openspec/changes/thin-wrapper-refactor/(proposal.md, design.md, specs/, tasks.md with 122 trackable tasks)Problem
orchestrator/core.py(3014 LOC)BaseAgent.run_stream()(~150 LOC)RunExecutorrun loop but uses bareasync for— silently fails pdai Capability hooksanyio.ObjectSendStreamhas no overflow control;blockpolicy deadlocks run loopTeam/TeamRungraph:YAML but no translator connects themResourceProviderhierarchyToolsetalready provides8-Phase Plan (bottom-up: refactor first, rename last)
core.pyintoevent_bus.py+session_controller.py+session_pool.pyBaseAgent.run_stream()standalone path; unify toRunExecutoranyiostreams →asyncio.Queue+ overflow policiesteams:→graph:translator; deprecateget_team()ToolsetFactoryprotocol replacingResourceProvider_ToolInterceptCapability)import-linterconfig + boundary contractsStacked PR Structure
Each phase is a separate child PR with base =
refactor/thin-wrapper. Child PRs merge into this branch one by one. When all phases are complete, this PR merges intodevelop/agenticand closes #74.Phase 1: Core Split (this PR)
Split the 3035-line
orchestrator/core.pyinto three focused modules:event_bus.pyEventBus,EventEnvelope,drain_and_merge, all merge helperssession_controller.pySessionController,SessionState, exceptions,SessionLifecyclePolicysession_pool.pySessionPoolcore.pyagentpool.orchestrator.corecontinue to work via re-exportsPhase 3: EventBus asyncio.Queue (merged via PR #96)
Replaced
anyio.memory_object_streamwithasyncio.Queuethroughout the EventBus and all consumers. Introduced configurable overflow policies replacing the previous hybrid timeout→drop strategy.Production changes
EventBusanyio.Lock→asyncio.Lock, memory streams →asyncio.QueueEventBus_enqueue()method with overflow policy dispatchEventBusdrain_and_merge()now drainsasyncio.Queue(QueueShutDown/QueueEmpty)session_pool.pystream.receive()→queue.get(),receive_nowait()→get_nowait()session_pool.pyanyio.EndOfStream→asyncio.QueueShutDown,WouldBlock→QueueEmptymixins.py_consumer_streamstype annotationanyio.abc→asyncio.QueueOverflow policies
drop_oldest— drop oldest item when queue is fulldrop_newest— drop newest item when queue is fulldrop_subscriber— disconnect the subscriber's queueGemini Code Assist review (4 comments, all resolved)
_stream_emptyhelper in test_performance.py / test_resume_session.py: changed from destructiveget_nowait()to non-destructivequeue.empty()test_close_session_signals_end_of_stream: now drains queue in a loop untilQueueShutDownis raisedtest_backpressure_drops_subscriber_when_buffer_full→ renamed totest_backpressure_retains_subscriber_with_drop_oldestKey Decisions
blockoverflow policy rejected (would deadlock run loop)asyncio.Queueover anyio memory streams (native Python 3.13 API,QueueShutDown/QueueEmpty)openspec/changes/thin-wrapper-refactor/design.md(D1–D8, risks R1–R10, open questions)Verification
Test plan
Follow-up
openspec/changes/thin-wrapper-refactor/tasks.md: removeTeam/TeamRunclasses, migrate 50 callers toGraphConfig+GraphBuilder, remove legacyasyncio.gather()parallel path. Blocks Phase 6 (feat(capabilities): Phase 6 — 6 pdai Capability implementations #100): Capabilities cannot correctly fire on multi-agent paths whileTeam/TeamRunbypass the graph run loop. This PR (refactor: Thin-wrapper refactor — pdai Capability-first architecture (#74) #93) cannot close [Refactor] Thin-wrapper refactor: pdai Capability-first architecture + rename to agentwolf #74 until those tasks are resolved.