fix(cloud-agent-next): preserve model IDs and queued intent

[eshurakov]

Summary

• Preserve Kilo Gateway model IDs through the Worker/control boundary and wrapper SDK requests, including command model, mode, and variant selection.
• Persist immutable per-message intent so changing session defaults, retries, Durable Object recreation, or sandbox replacement cannot change queued work.
• Validate follow-up admission using stored auth/org context, preserve validation error semantics, and handle concurrent replays and legacy queued records without rewinding defaults.
• Add regression coverage for model normalization, SDK serialization, admission races, reconnect/replacement, and legacy compatibility.

Verification

No manual full-stack E2E was run in this session: the worktree has no root .env.local and no running local services. The complete Worker/sandbox/web create-and-send path remains unverified.

Visual Changes

N/A

Reviewer Notes

• Roll out compatible wrappers first and retire older wrappers before enabling Worker-produced model-less commands. The protocol-v1 handshake is not a build compatibility gate.
• Previous Worker code cannot read the new nested queue intent format; account for persisted records when planning rollback.
• In-instance dispatch coalescing does not provide exactly-once delivery; ambiguous handoffs remain at-least-once.

Automated checks

• pnpm --filter cloud-agent-next run test:all: 3,371 unit tests passed (3 skipped), 351 Workers integration tests passed, and 435 Bun wrapper tests passed.
• pnpm --filter cloud-agent-next run typecheck: passed for service and wrapper.
• pnpm --filter cloud-agent-next run lint: passed with no warnings or errors.
• pnpm format on the 18 changed code files and git diff --check: passed.
• The Workers suite exited successfully while logging dependency sourcemap warnings and teardown/socket-close diagnostics.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (9 files)

• services/cloud-agent-next/src/kilo-facade/user-kilo-facade.test.ts
• services/cloud-agent-next/src/persistence/model-utils.test.ts
• services/cloud-agent-next/src/sandbox-control/frames.test.ts
• services/cloud-agent-next/src/sandbox-session/session-message-queue.test.ts
• services/cloud-agent-next/src/session/queue-message.test.ts
• services/cloud-agent-next/test/fixtures/gateway-model-ids.ts
• services/cloud-agent-next/test/integration/sandbox-control.test.ts
• services/cloud-agent-next/test/unit/wrapper/kilo-api.test.ts
• services/cloud-agent-next/wrapper/src/control/sandbox-control-handlers.test.ts

Previous Review Summary (commit 36921d0)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 36921d0)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (18 files)

• services/cloud-agent-next/src/execution/types.ts
• services/cloud-agent-next/src/kilo-facade/user-kilo-facade.test.ts
• services/cloud-agent-next/src/kilo-facade/user-kilo-facade.ts
• services/cloud-agent-next/src/persistence/CloudAgentSession.ts
• services/cloud-agent-next/src/persistence/model-utils.test.ts
• services/cloud-agent-next/src/sandbox-control/frames.test.ts
• services/cloud-agent-next/src/sandbox-session/SandboxSession.ts
• services/cloud-agent-next/src/sandbox-session/session-message-queue.test.ts
• services/cloud-agent-next/src/sandbox-session/session-message-queue.ts
• services/cloud-agent-next/src/session/queue-message.test.ts
• services/cloud-agent-next/src/session/queue-message.ts
• services/cloud-agent-next/src/shared/sandbox-control-protocol.ts
• services/cloud-agent-next/test/fixtures/gateway-model-ids.ts
• services/cloud-agent-next/test/integration/sandbox-control.test.ts
• services/cloud-agent-next/test/unit/wrapper/kilo-api.test.ts
• services/cloud-agent-next/wrapper/src/control/sandbox-control-handlers.test.ts
• services/cloud-agent-next/wrapper/src/control/sandbox-control-handlers.ts
• services/cloud-agent-next/wrapper/src/kilo-api.ts

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_{Reviewed by grok-4.6 · Input: 255.5K · Output: 9.6K · Cached: 88.6K}

_{Review guidance: REVIEW.md from base branch main}