Phase 2 of TODO-agent-2: one employee, one turn, real tools in the sandbox.
- engine/prompt.py: the stable, cache-friendly prefix in the plan's order
(rules → role protocol → toolkit → app profile → memory), a task brief
capped at 1200 chars, role-specific stage context (spec for the developer,
the diff only for the reviewer, test output for the tester) and a hard
prompt cap that drops the oldest tool results first.
- engine/tools.py: READ/WRITE/EDIT/LIST_DIR/SEARCH/RUN executed inside the
sandbox through SandboxProviderPort, rooted at the worktree's sandbox path.
Path escapes, .. and .git are refused; git push/remote/config are refused
with "the platform does git"; RUN clamps its timeout (120s default, 600s
max) and keeps the tail of its output; every execution writes a tool_calls
row so the approvals UI shows real work.
- engine/runner.py: the loop — model call, parse tags, execute tool tags,
feed results back — until a terminal tag, the tool cap, the turn timeout or
a cancellation. The employee's model is checked against ModelGrantPort
before the first call (ungranted → error_kind=auth, no spend), errors are
classified transient vs fatal, and every model call writes usage events
through the one shared record_model_usage path (extracted from
WorkforceService so manager chat counts too). Writes engine_turns, run_steps
and tool_calls.
- engine/events.py: RunFeed batches run.log (≤1 event / 500 ms / stream, ≤200
lines) and emits run.tool and task.gate through the generic envelope.
- tests: engine_fakes.py (ScriptedModel, FakeSandbox, FakeGrants,
RecordingMemory) plus 54 new tests in test_engine_runner,
test_engine_prompt and test_engine_tools.
Suite: 648 passed, ruff clean, mypy clean.
mjalmoudy94
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