generated: '2026-07-25'
method: searched
source: https://github.com/MEF-GIT (GitHub Releases for the six LSO SDK repositories)
docs: https://lso.mplify.net/lso-api-sdk-releases
scheme: named suite-wide SDK releases (singers, alphabetical) cut simultaneously across all six LSO SDK
  repos; each API inside carries its own semantic document version and uri-path major version
current:
  release: kylie
  date: '2026-02-17'
  headline: Ninth LSO API release. MCP Server code added for every Seller-side API; Circuit Impairment
    and Maintenance Notification API (Mplify 175) published; Address (121.1), Site (122.1), POQ (87.1),
    Quote (115.1), Inventory (116.1), Ordering (123.1), Trouble Ticket (124.1), Appointment/Work Order
    (137.1), Billing (141.1) and Product Catalog (142) Developer Guides published as standards; first
    release under the Mplify Alliance name (MEF Forum rebranded 24 June 2025) with already-published standards
    keeping the MEF name.
breaking_change_signal: a major version bump in the API path segment (e.g. productOrderingManagement/v10
  -> v11)
entries:
- release: kylie
  date: '2026-02-17'
  sdks:
  - Allegro
  - Cantata
  - Interlude
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Allegro-SDK/releases/tag/kylie
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/kylie
  - https://github.com/MEF-GIT/MEF-LSO-Interlude-SDK/releases/tag/kylie
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/kylie
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/kylie
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/kylie
- release: janis
  date: '2025-07-11'
  sdks:
  - Allegro
  - Cantata
  - Interlude
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Allegro-SDK/releases/tag/janis
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/janis
  - https://github.com/MEF-GIT/MEF-LSO-Interlude-SDK/releases/tag/janis
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/janis
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/janis
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/janis
- release: irene
  date: '2025-01-16'
  sdks:
  - Allegro
  - Cantata
  - Interlude
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Allegro-SDK/releases/tag/irene
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/irene
  - https://github.com/MEF-GIT/MEF-LSO-Interlude-SDK/releases/tag/irene
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/irene
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/irene
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/irene
- release: haley
  date: '2024-06-20'
  sdks:
  - Allegro
  - Cantata
  - Interlude
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Allegro-SDK/releases/tag/haley
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/haley
  - https://github.com/MEF-GIT/MEF-LSO-Interlude-SDK/releases/tag/haley
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/haley
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/haley
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/haley
- release: grace
  date: '2023-12-20'
  sdks:
  - Allegro
  - Cantata
  - Interlude
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Allegro-SDK/releases/tag/grace
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/grace
  - https://github.com/MEF-GIT/MEF-LSO-Interlude-SDK/releases/tag/grace
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/grace
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/grace
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/grace
- release: fergie
  date: '2023-06-23'
  sdks:
  - Allegro
  - Cantata
  - Interlude
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Allegro-SDK/releases/tag/fergie
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/fergie
  - https://github.com/MEF-GIT/MEF-LSO-Interlude-SDK/releases/tag/fergie
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/fergie
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/fergie
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/fergie
- release: ella
  date: '2023-01-06'
  sdks:
  - Cantata
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/ella
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/ella
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/ella
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/ella
- release: dolly
  date: '2022-06-08'
  sdks:
  - Cantata
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/dolly
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/dolly
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/dolly
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/dolly
- release: celine
  date: '2022-01-14'
  sdks:
  - Cantata
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/celine
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/celine
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/celine
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/celine
- release: billie-final
  date: '2021-06-07'
  sdks:
  - Cantata
  - Legato
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/billie-final
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/billie-final
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/billie-final
- release: billie
  date: '2021-06-07'
  sdks:
  - Presto
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/billie
- release: aretha
  date: '2020-12-23'
  sdks:
  - Cantata
  - Legato
  - Presto
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Cantata-SDK/releases/tag/aretha
  - https://github.com/MEF-GIT/MEF-LSO-Legato-SDK/releases/tag/aretha
  - https://github.com/MEF-GIT/MEF-LSO-Presto-SDK/releases/tag/aretha
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/aretha
- release: rc5.1
  date: '2020-09-16'
  sdks:
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/rc5.1
- release: rc5
  date: '2020-07-31'
  sdks:
  - Sonata
  urls:
  - https://github.com/MEF-GIT/MEF-LSO-Sonata-SDK/releases/tag/rc5
per_release_detail: Each release page carries full notes plus per-API README release notes inside productApi/
  and serviceApi/ directories.
note: Release counts differ per repo because the Presto, Legato and Sonata SDKs were published earlier
  than the Allegro and Interlude SDKs; from fergie (2023-06-23) onward every release is cut across all
  six.