Release cycle: principal layer + tiered reporting end-to-end (3.2)

[bokelley]

Tracking issue for the full cycle — protocol → RC → SDKs → reference implementations → docs → training → pilots. The bet: the principal layer and tiered reporting ship experimental in the 3.2 RC, the largest implementer adopts immediately (scope3data/agentic-api#12538), and the RC window is the cleanup loop before 3.2 stable.

Protocol (this repo)

• Merge feat(protocol): add agent configuration sync #6966 (principal layer) — in flight
• Merge feat(protocol): the principal layer — unified webhooks, declarations, principal.changed #7020 (principal extensions: declarations, principal.changed, connection-wide events)
• Merge feat(reporting): add managed reporting status schemas #6953 (tiered reporting) after gate-2 vocabulary consolidation onto principal-layer $refs — gates 1/3 re-scoped to stable promotion per #6911 decision
• Cut the 3.2 RC (release owner)
• 3.2 release documentation: release-notes entries for both surfaces, intro banner, roadmap; implementation guide ships with feat(reporting): add managed reporting status schemas #6953; Docs: 'Register your buyer agent' walkthrough for the principal layer #7057 register-your-buyer-agent walkthrough
• Experimental-status table current for protocol.principal + media_buy.reporting_delivery

SDKs (regenerate from the RC bundle, not branches)

• TypeScript: adcp-client#2789 (principal both-sides + Core reconciler rework of feat(editorial): reviewer notifications on pending_review (#2701) #2726)
• Python: adcp-client-python#1106 (twin; rework of feat: Consolidate individual profiles and show contributions #1095)

Reference implementations

• Training agent implements the principal layer (Training agent: implement the principal layer (sync_principal / get_principal) #7056) → universal/principal storyboard goes live-graded; Fixture-dependent conformance for agent configuration lifecycle #7010 fixture scenarios get their controller home
• Interchange program: scope3data/agentic-api#12538 (registry, handlers, console, reporting core, managed drivers, dogfood, pilot kit)

Training

• Certification/curriculum coverage (companion issue)

Pilots

• Core-tier pilots with partner sales agents; success metric: "implemented Core in N days with zero warehouse code"

Stable-promotion gates (before 3.2 stable / ratification)

• Proposal: unify operational snapshots and official delivery as revisioned facts #6122 finality WG session (critical path for reconciled_billing)
• Independent human protocol review (volunteer requested at WG)

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