[kvlonge]

Why

A broad selector can expand into an unexpectedly large development build, and a long-running local command can continue consuming warehouse compute without a configured stop condition. Projects need target-specific guardrails without changing unrestricted targets.

Changes

• add optional target execution_limits with max_models, max_duration, and custom remediation
• merge local target overrides field by field
• block oversized direct and virtual builds before warehouse mutation, including defer-clone preflight
• enforce Snowflake deadlines through scheduler checks and per-statement warehouse timeouts
• document configuration, validation, adapter support, and local overrides
• add unit and E2E regression coverage

Verification

• uv run pytest tests/unit/src/sqlbuild/adapters/snowflake/classes/snowflake_connection/test_snowflake_connection.py tests/unit/src/sqlbuild/cli/commands/_helpers/build_planning/test_execution_limits.py tests/unit/src/sqlbuild/compiler/discovery/_helpers/test_yml_project.py tests/unit/src/sqlbuild/spec/contracts/main/test_targets.py tests/unit/src/sqlbuild/executor/pipeline/_helpers/test_connections.py -n auto --dist loadfile
• uv run pytest tests/integration/src/sqlbuild/executor/build/test_build_execution.py tests/integration/src/sqlbuild/executor/build/concurrent/test_concurrent_build.py -n auto --dist loadfile
• make check-ci
• public repository hygiene scan