H.4.3 Contributions

Cross-team contribution removes handoffs while preserving responsibility boundaries.

• Publish supported APIs, contribution expectations, proposal thresholds, compatibility guarantees, and escalation paths.
• Let small compatible changes use ordinary review; escalate architectural, breaking, sensitive, or high-blast changes deliberately.
• State whether the contributor, steward, or migration team updates consumers and completes cleanup.
• Use collaboration, facilitation, or service-style interaction with an explicit duration and handoff.
• Contribution permission does not grant approval authority or transfer long-term maintenance silently.