EPIC R06 (Team Hoa) - workspace/filesystem isolation, no cross-project
mutable state.
R06-T01 domain/workspaces/workspace_session.py
WorkspaceSession - project_id/workspace_root/sandbox_dir/allowed_paths
frozen snapshot + is_allowed(path), same "capture once at submit time"
shape as R04's ConversationExecutionRequest.
R06-T02 infrastructure/persistence/json/{atomic_write,workspace_repository_impl,conversation_repository_impl}.py
Real bug fixed: core/projects.py::save_project and core/history.py's
save_conversation/rename_conversation/set_pinned did a plain
path.write_text(json.dumps(...)) - two syscalls, no atomicity. A crash
between them leaves a half-written file that load_project/load_conversation
then silently treat as "missing". All four now write through
atomic_write.write_json (temp file + os.replace). WorkspaceRepository/
ConversationRepository are thin object-shaped facades over the same
(now-atomic) functions, for future application-layer callers.
NOTE: atomic_write.py is deliberately NOT named atomic_json_file.py -
R02-T01 (Team Nam) claims that filename for the same purpose app-wide;
see the checklist for the consolidation TODO.
R06-T03 infrastructure/filesystem/execution_workspace.py
ExecutionWorkspace names the output_dir/scratch_dir split that already
exists (core/chat_agent.py's flat workspace_root/.scratch) - does not
move anything.
R06-T04 ui/chat_panel.py
The actual race: ChatPanel._persist_session (saves a BACKGROUND turn's
conversation) resolved its save directory via a live
self.ctx.config.history_dir() read at save time. ui/workspace_tab.py::
_load_current mutates that same config field on every project switch, so
a turn still running when the user switched projects got saved into the
NEW project's history folder. Fixed by adding "home_history_dir" to the
per-turn ctx dict (same "home_*" snapshot convention already used for
session id/messages/title), captured at submit time. Verified with a real
offscreen-Qt test, not just a unit double:
tests/integration/test_history_dir_race.py.
R06-T05 application/workspaces/file_workspace_service.py
FileWorkspaceService - the File Explorer / AI Editor entry point for the
same safe read/write/edit operations the agent tool loop has, by calling
core/tools.py::execute_tool directly (same dispatch, same ToolContext
containment, same audit log) rather than reimplementing any of it.
New tests: tests/unit/test_workspace_session.py,
test_atomic_write_and_repositories.py, test_execution_workspace.py,
test_file_workspace_service.py, tests/integration/test_history_dir_race.py
(29 new tests, incl. 2 real offscreen-Qt integration tests).
Suite: 283 passed, 4 pre-existing failures unrelated to R05/R06 (see
checklist). check_imports: PASS. All new files < 400 LOC.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
EPIC R04 (Team Duy) - the turn lifecycle leaves the widget.
R04-T01 domain/agents/conversation_execution_request.py
Frozen snapshot of one turn, captured on the UI thread at submit time. The
job closure used to read widget/workspace state from inside the worker
thread, so a turn could run on a mix of submit-time and later state
depending on thread timing.
R04-T02 domain/agents/agent_event.py
13 frozen event types replacing untyped emit() dicts, with a two-way bridge
so existing widgets keep consuming the legacy shape until EPIC R08. Adds
TurnCompletedEvent - the end-of-turn signal the engine never had, which is
why a cancelled turn and a failed turn look identical to the UI today.
R04-T03 application/conversations/conversation_application_service.py
Runs a turn from a request and reports typed events. Never raises across the
worker boundary; TurnResult.raise_if_failed() preserves the existing
exception-based failure path. begin_turn()/execute_turn() expose the live
message list for callers that autosave history mid-run.
R04-T04 ui/cowork_tab.py::build_job -> snapshot + service.
R04-T05 core/task_executors.py::_run_agent -> same service (was a second,
slightly different assembly of the same call).
Caught while wiring the bridge: the first event vocabulary had no "notice"
event, so Agent Security warnings and auto-compaction notices would have been
silently swallowed. Added NoticeEvent plus a test that scans the engine sources
for emit() tags and fails when one has no typed counterpart.
New: tests/integration/ - real offscreen CoworkTab running a scripted turn end
to end (7 tests), including a characterisation of the extra provider call Agent
Security spends reviewing each request.
Suite: 225 passed, 2.74s. check_imports: PASS. All new files < 400 LOC.
2 pre-existing failures remain in test_config_security.py (EPIC R02/Team Nam).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
EPIC R03 (Team Duy) - one provider catalogue, one routing flow, one usage seam.
R03-T01 tests/contracts/test_providers.py
29 contract tests every provider must satisfy: canonical assistant message,
streamed text == returned content, reasoning never joins the answer, parsed
tool arguments, ProviderError for every failure. Real adapters exercised
offline by stubbing Provider._request.
R03-T02 domain/models/provider_descriptor.py
infrastructure/providers/provider_registry.py
Provider facts declared once (was split across providers/factory.py,
DEFAULT_CONFIG and PROVIDER_LABELS). ProviderRegistry.build() also stamps the
descriptor id onto the instance, so ollama/github_copilot/codex usage is no
longer all attributed to "openai_compat", and never mutates the caller config.
R03-T03 application/model_routing/routing_application_service.py
Pure-Python routing policy with four modes: Off, Auto, Manual and the new
Fallback (switch only AFTER the current model fails). Depends on a RoutingPort
protocol; production wires the existing core.routing engine underneath.
R03-T04/T05 ui/chat_panel.py, ui/co4e_tab.py, ui/folder_tab.py
Three near-identical routing copies (~40 lines each) replaced by a call to
ctx.routing_application() plus a confirm callback. Mode vocabulary now lives
in one place (normalize_mode/is_valid_mode) instead of four literal tuples.
R03-T06 infrastructure/telemetry/usage_sink.py
Token usage extracted from both providers into UsageEvent + UsageEventSink.
Estimation pinned against core.usage_tracker so no recorded number changes.
Also fixes a deadlock introduced while wiring AppContext: routing_application()
held _routing_lock and called routing(), which takes the same non-reentrant lock.
Suite: 186 passed, 1.22s. check_imports: PASS. All new files < 400 LOC.
2 pre-existing failures remain in test_config_security.py (EPIC R02/Team Nam).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
vudt15andClaude Sonnet 5
anhtnm1andClaude Opus 5
