Cap time.sleep and asyncio.sleep globally at 10ms in before_all to
eliminate retry/backoff waits (tenacity wait_fixed, retry_auto_debug
exponential backoff). Save originals as time._original_sleep and
asyncio._original_sleep for tests that need real wall-clock delays
(CircuitBreaker recovery, debounce timers, validation timeouts).
Enhance template-DB patch: add "db." prefix to _SCENARIO_DB_PREFIXES
and check db_path.stat().st_size > 0 so 0-byte auto-created SQLite
files receive the template copy instead of falling through to real
migrations.
Replace subprocess.run CLI invocations with typer.testing.CliRunner
in module_coverage, main_coverage_complete, and coverage_extras step
files, eliminating ~6s Python cold-start overhead per call.
Switch plan_persistence and action_persistence to in-memory SQLite by
default; only cross-restart scenarios use file-based via an explicit
Given step.
Replace MigrationRunner.run_migrations with Base.metadata.create_all
in plan_service_steps for freshly created in-memory engines.
Removed leftover debug comment in environment.py.
Total tier runtime: 565s -> 21s (96% reduction), 20 features all
under 5s behave-internal time.
ISSUES CLOSED: #480
Implement SubplanExecutionService and SubplanMergeService to enable
parent plans to decompose work into coordinated child subplans with
configurable execution modes (sequential, parallel, dependency-ordered)
and merge strategies (git_three_way, sequential_apply, fail_on_conflict,
last_wins).
- SubplanExecutionService: schedules subplan execution with retry
support via SubplanFailureHandler, max_parallel limits, fail_fast
semantics, and topological DAG ordering for dependency mode
- SubplanMergeService: wraps sandbox merge infrastructure to combine
subplan sandbox outputs using the configured merge strategy
- BDD tests: 21 scenarios covering all execution modes, merge
strategies, validation, and integration flows
- Robot tests: 11 integration test cases with helper module
- ASV benchmarks: performance benchmarks for execution and merge
- Documentation: reference guide in docs/reference/subplans.md
ISSUES CLOSED: #184
freemo
Luis Mendes
