1. Create new JSON schema in shared-data/protocol/schemas/${schemaVersion}.json
2. Create TS types for new schema in shared-data/protocol/types
3. Create or modify Python types as necessary in both python/opentrons_shared_data/protocol/dev_types and in the python api dev_types in api/src/opentrons/protocol_api/dev_types.py
4. Create new executor in api to handle new schema. Be sure to include unit tests
5. Add new test in api/tests/opentrons/test_execute.py for the schema
6. Add new test in shared-data/js/__tests__/protocolSchemaV${schemaVersion}.test.js to ensure new schema definition functions as intended
7. Add new schema fixture to shared-data/protocol/fixtures/${schemaVersion}/${schemaVersion}.json that the above test will read
8. Update MAX_SUPPORTED_VERSION in api/src/opentrons/protocols/parse.py

IMPORTANT: Be sure to clearly communicate the schema bump to the software + QA teams. This is a strict contract that should be honored by both the frontend and robot stack.