generated: '2026-09-17'
method: searched
source: >-
  https://github.com/IABTechLab/seller-agent/blob/main/CHANGELOG.md (Keep-a-Changelog, dated) and the
  GitHub releases of openrtb2.x and AdCOM (https://github.com/InteractiveAdvertisingBureau/openrtb2.x/releases).
scheme: semver (seller-agent / buyer-agent / iab-agentic-primitives) and date-coded standard releases (OpenRTB 2.6-YYYYMM, AdCOM 1.0-YYYYMM)
current_version:
  seller_agent: 2.4.2
  buyer_agent: 2.4.2
  iab_agentic_primitives: 0.5.1
  openrtb: 2.6-202606
  adcom: 1.0-202607
entries:
- version: seller-agent Unreleased
  date: null
  breaking: true
  highlights:
  - Booking (POST /api/v1/deals) now requires a verified buyer key matching the quote; the MCP deal-from-template tool is operator-gated
  - Operator rate card now drives pricing (matching entries override catalog base CPM for quotes, bookings, negotiation anchors)
  - Internal deal statuses mapped to the shared wire enum on read (confirmed -> booked, deprecated -> cancelled)
  - API root and /.well-known/agent.json now report the package version instead of a hardcoded literal
- version: seller-agent 2.4.2
  date: '2026-08-17'
  breaking: false
  highlights:
  - Operator key CLI management (ad-seller list-operator-keys, delete-operator-key)
  - FD-12 idempotency now enforced on POST /api/v1/quotes; migrating an already-migrated deal returns 409
  - Pricing fix - a higher-priority discount-only rule no longer stacks
  - iab-agentic-primitives pinned to v0.5.1
- version: seller-agent 2.4.1
  date: '2026-08-05'
  breaking: false
  highlights:
  - CREW_MEMORY_ENABLED now defaults to false; embedder options documented
  - README documents the locked uv workflow
- version: seller-agent 2.4.0
  date: '2026-08-04'
  breaking: true
  highlights:
  - Admin surface now requires operator credentials (API key lifecycle, event log, rate-card writes, registry and package mutations, inventory sync trigger, deal push/distribution, order transitions, change-request decisions)
  - Failed proposals report structured errors[]
  - ANTHROPIC_API_KEY optional at startup
- version: OpenRTB 2.6-202606
  date: '2026-06-11'
  breaking: false
  highlights:
  - Monthly non-breaking release of the OpenRTB 2.6 specification and openrtb.proto (previous releases 2.6-202505, 2.6-202501, 2.6-202409)
- version: AdCOM 1.0-202607
  date: '2026-07-16'
  breaking: false
  highlights:
  - Monthly non-breaking AdCOM 1.0 release (previous 1.0-202606)