Rust Crate v1.4.0

Added

• (unstable) Add descriptions to elicitation enum options (#1397)

Rust Crate v1.3.0

Added

• (schema) Stabilize boolean session config options (#1604)
• (unstable-v2) tighten v2 field validation (#1587)
• (unstable-v2) New diff format (#1586)
• (unstable-v2) Unify session/load and session/resume (#1584)
• (unstable-v2) require more session methods by default (#1578)
• (unstable-v2) More flexible permission requests (#1577)
• (unstable-v2) Align v2 Content types with the latest MCP spec (#1576)
• (unstable-v2) Unify the ID naming conventions across the schema (#1567)
• (unstable-v2) require typed config values (#1561)

Fixed

• (schema) Reject malformed protocol fields (#1583)
• (unstable) remove URL elicitation error (#1574)
• (unstable-v2) Preserve meta update signals in v2 (#1573)
• (unstable-v2) Continue to make more enums future compatible (#1571)
• (unstable-v2) Make empty MCP arrays optional (#1570)
• (unstable-v2) Make all session lifecycle requests consistent (#1555)

Other

• (schema) Clean up generated documentation and make wording more consistent (#1568)
• (rust) Box v2 protocol enum variants (#1562)

Schema v1.19.0

Added

• (unstable) Add descriptions to elicitation enum options (#1397)

Schema v1.18.0

Added

• (schema) Stabilize boolean session config options (#1604)
• (unstable-v2) Unify the ID naming conventions across the schema (#1567)

Fixed

• (schema) Reject malformed protocol fields (#1583)
• (unstable) remove URL elicitation error (#1574)
• (unstable-v2) Continue to make more enums future compatible (#1571)

Other

• (schema) Clean up generated documentation and make wording more consistent (#1568)

Rust Crate v1.2.0

Added

• (schema) Stabilize request cancellation (#1549)
• (unstable-v2) use EnvVariable for terminal auth env (#1522)
• (unstable-v2) Require auth logout support (#1520)
• (unstable-v2) Group v2 auth methods under auth/* (#1519)
• (unstable-v2) require v2 implementation info (#1517)

Fixed

• (unstable-v2) allow null auth capabilities (#1539)
• Deserialization leniency part 2 (#1526)
• (unstable-v2) make mcpServers optional in new sessions (#1523)
• (rust) Clean up Protocol version handling (#1515)

Other

• (unstable-v2) reorder v2 content fields (#1541)
• (unstable-v2) Clean up client schema types (#1540)
• (schema) correct Implementation description (#1518)

Schema v1.17.0

Added

• (schema) Stabilize request cancellation (#1549)

Fixed

• Deserialization leniency part 2 (#1526)
• (unstable-v2) make mcpServers optional in new sessions (#1523)

Other

• (unstable-v2) Clean up client schema types (#1540)
• (schema) correct Implementation description (#1518)

Rust Crate v1.1.0

Added

• (schema) Stabilize model_config option category (#1502)

Rust Crate v1.0.0

Added

• (unstable) Add boolean config option capabilities (#1490)

Schema v1.16.0

Added

• (schema) Stabilize model_config option category (#1502)

Schema v1.15.0

Added

• (unstable) Add boolean config option capabilities (#1490)