Design moves that pay off
Favor clarity at boundaries over implicit convention that only the author team understands.
Discoverability
Capabilities should be locatable with stable identifiers and plain-language scope - so partners do not reverse-engineer you.
Consent and scope
Data and actions crossing edges should carry purpose-bound permission, not one-off tokens that mean everything.
Versioned change
Deprecation windows, dual-run periods, and honest breaking-change notes beat surprise outages.
Recoverability
When links fail, operators need runbooks, rollback, and comms paths - not heroics.
Anti-patterns to avoid
These failures show up when speed outruns boundary design.
- 'Integrate by reading our prod traffic' instead of documented contracts.
- Authentication that proves identity but not intent or jurisdiction for a given exchange.
- Silent schema drift that turns partners into forensic analysts.
Trust at the interface
Affordances rest on proofs and discipline - see how contracts carry trust.