Summary

• Move production instance-store/bootstrap wiring into an explicit instance layer instead of InstanceRuntime.layer.
• Keep Instance as the ALS facade and route Promise callers through WithInstance.
• Remove Instance.provide and LoadInput.init; worktree bootstrapping now uses InstanceStore.Service directly.
• Make the legacy instance config route response-safe by scheduling disposal after the successful config response is constructed.

Verification

• bun typecheck
• bun run test test/project/instance.test.ts test/project/instance-bootstrap-regression.test.ts
• bun run test test/project/worktree.test.ts test/project/worktree-remove.test.ts
• bun run test test/server/httpapi-instance-context.test.ts
• env -u OPENCODE_EXPERIMENTAL_WORKSPACES bun run test (one timeout in test/session/retry.test.ts; rerun passed)
• bun run test test/session/retry.test.ts
• git diff --check