Android: ship public Kotlin embedder SDK for Compose clients

[enricopiovesan]

Summary

Ship the public Kotlin/Android embedder SDK required by reference-apps #115.

Depends on

• Spec 068 approval.

Definition of Done

• Versioned Kotlin/Android artifact exposes every Spec 068 embedder operation, including compatible-capability start/stop/kill, with stable public types.
• It loads bundled runtime/manifests/capabilities and has no production dependency on traverse-cli serve.
• It forwards runtime-owned output, state, and structured errors without UI/business-rule duplication.
• It includes public API docs, compatibility policy, and deterministic test double.
• It passes shared conformance plus Android package tests.
• Android Compose reference-app integration executes a bundled workflow without a sidecar.
• Release evidence records package version, runtime-WASM digest, and conformance version.

Unblocks

• reference-apps Template executable capability packages #115 after Template executable capability package manifests and deterministic build commands #111 and Document adapter responsibilities versus core runtime responsibilities #112 are also complete.

[enricopiovesan]

Unblocked (2026-07-13): Spec 068 was approved and merged in PR #651. This implementation ticket is now Ready.

[enricopiovesan]

Blocked after pre-flight (2026-07-13): this ticket explicitly depends on Spec 068 approval, but current main contains no specs/068-* artifact and no approved-spec registry entry for 068. Unblock by landing and approving Spec 068 with the public Kotlin API, packaging/digest, conformance, and compatibility commitments.

[enricopiovesan]

Board correction (2026-07-13): Spec 068 is approved and present on main via PR #651. The earlier blocker report was stale. This ticket is Ready; its Definition of Done now correctly cites Spec 068 and the complete embedder lifecycle.

[enricopiovesan]

Blocked completion audit (2026-07-14): the public Kotlin package foundation, ordered subscription, compatible start/stop/kill lifecycle, and stable instance/result semantics have landed through PRs #670, #680, and #698. The ticket cannot satisfy its remaining DoD yet: reference-apps #115 explicitly follows #111 and #112, and both prerequisite issues are currently open and Blocked. Remaining work also includes the production runtime-WASM bridge, shared/Android conformance execution, release evidence publication, and the no-sidecar Compose integration. Moving Project 1 to Blocked until reference-apps #111 and #112 are complete and the downstream integration lane is actionable.