diff --git a/src/mig/agent/agent.go b/src/mig/agent/agent.go
index 530912fb..6bdb495a 100644
--- a/src/mig/agent/agent.go
+++ b/src/mig/agent/agent.go
@@ -498,8 +498,8 @@ func runModule(ctx Context, op moduleOp) (err error) {
 		execTimeOut = op.expireafter.Sub(time.Now())
 	}
 
-	// Command arguments must be in json format
-	modParams, err := json.Marshal(op.params)
+	// Build parameters message
+	modParams, err := json.Marshal(modules.MakeParametersMessage(op.params))
 	if err != nil {
 		panic(err)
 	}
diff --git a/src/mig/api/compliance.go b/src/mig/api/compliance.go
index 74c65e07..9d9f002d 100644
--- a/src/mig/api/compliance.go
+++ b/src/mig/api/compliance.go
@@ -9,6 +9,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"mig"
+	"mig/modules"
 	"mig/modules/file"
 	"time"
 )
@@ -73,12 +74,17 @@ func commandsToComplianceItems(commands []mig.Command) (items []ComplianceItem,
 			}
 			switch cmd.Action.Operations[i].Module {
 			case "file":
-				var r file.Results
+				var el file.SearchResults
+				var r modules.Result
 				err = json.Unmarshal(buf, &r)
 				if err != nil {
 					return items, err
 				}
-				for label, sr := range r.Elements {
+				err = r.GetElements(&el)
+				if err != nil {
+					return items, err
+				}
+				for label, sr := range el {
 					for _, mf := range sr {
 						bitem.Check.Location = mf.File
 						bitem.Check.Name = label
diff --git a/src/mig/client/client.go b/src/mig/client/client.go
index 30a06b33..52d08ec7 100644
--- a/src/mig/client/client.go
+++ b/src/mig/client/client.go
@@ -18,6 +18,7 @@ import (
 	"io"
 	"io/ioutil"
 	"mig"
+	"mig/modules"
 	"mig/pgp"
 	"mime/multipart"
 	"net/http"
@@ -847,7 +848,7 @@ func PrintCommandResults(cmd mig.Command, onlyFound, showAgent bool) (err error)
 	}
 	for i, result := range cmd.Results {
 		if !onlyFound {
-			for _, rerr := range cmd.Results.Errors {
+			for _, rerr := range result.Errors {
 				fmt.Fprintf(os.Stderr, "%s[error] %s\n", prefix, rerr)
 			}
 		}
@@ -865,10 +866,10 @@ func PrintCommandResults(cmd mig.Command, onlyFound, showAgent bool) (err error)
 			}
 			continue
 		}
-		modRunner := mig.AvailableModules[moduleName].Runner()
+		modRunner := modules.Available[moduleName].Runner()
 		// look for a result printer in the module
-		if _, ok := modRunner.(mig.HasResultsPrinter); ok {
-			outRes, err := modRunner.(mig.HasResultsPrinter).PrintResults(result, onlyFound)
+		if _, ok := modRunner.(modules.HasResultsPrinter); ok {
+			outRes, err := modRunner.(modules.HasResultsPrinter).PrintResults(result, onlyFound)
 			if err != nil {
 				panic(err)
 			}
diff --git a/src/mig/client/cmd/main.go b/src/mig/client/cmd/main.go
index 80aa4d2a..97f4d8ea 100644
--- a/src/mig/client/cmd/main.go
+++ b/src/mig/client/cmd/main.go
@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"mig"
 	"mig/client"
+	"mig/modules"
 	"os"
 	"os/signal"
 	"time"
@@ -50,7 +51,7 @@ Results are sent to stdout, redirect them with "1>/path/to/file".
 Each module provides its own set of parameters. Module parameters must be set *after*
 global options. Help is available by calling "<module> help". Available modules are:
 `, os.Args[0], os.Args[0])
-	for module, _ := range mig.AvailableModules {
+	for module, _ := range modules.Available {
 		fmt.Printf("* %s\n", module)
 	}
 	fmt.Printf("To access a module documentation, use: %s <module> help\n", os.Args[0])
@@ -125,7 +126,7 @@ func main() {
 	// * fs.Args() with the module parameters is passed as a string to the module parser
 	//   which will return a module operation to store in the action
 	op.Module = os.Args[1]
-	if _, ok := mig.AvailableModules[op.Module]; !ok {
+	if _, ok := modules.Available[op.Module]; !ok {
 		panic("Unknown module " + op.Module)
 	}
 
@@ -154,12 +155,12 @@ func main() {
 	for _, arg := range fs.Args() {
 		modargs = append(modargs, arg)
 	}
-	modRunner = mig.AvailableModules[op.Module].Runner()
-	if _, ok := modRunner.(mig.HasParamsParser); !ok {
+	modRunner = modules.Available[op.Module].Runner()
+	if _, ok := modRunner.(modules.HasParamsParser); !ok {
 		fmt.Fprintf(os.Stderr, "[error] module '%s' does not support command line invocation\n", op.Module)
 		os.Exit(2)
 	}
-	op.Parameters, err = modRunner.(mig.HasParamsParser).ParamsParser(modargs)
+	op.Parameters, err = modRunner.(modules.HasParamsParser).ParamsParser(modargs)
 	if err != nil || op.Parameters == nil {
 		panic(err)
 	}
diff --git a/src/mig/client/console/action_launcher.go b/src/mig/client/console/action_launcher.go
index e292b7ab..293617d1 100644
--- a/src/mig/client/console/action_launcher.go
+++ b/src/mig/client/console/action_launcher.go
@@ -12,6 +12,7 @@ import (
 	"io"
 	"mig"
 	"mig/client"
+	"mig/modules"
 	"strconv"
 	"strings"
 	"time"
@@ -80,15 +81,15 @@ func actionLauncher(tpl mig.Action, cli client.Client) (err error) {
 			// ParamsCreator takes care of retrieving using input
 			var operation mig.Operation
 			operation.Module = orders[1]
-			if _, ok := mig.AvailableModules[operation.Module]; ok {
+			if _, ok := modules.Available[operation.Module]; ok {
 				// instanciate and call module parameters creation function
-				modRunner := mig.AvailableModules[operation.Module].Runner()
-				if _, ok := modRunner.(mig.HasParamsCreator); !ok {
+				modRunner := modules.Available[operation.Module].Runner()
+				if _, ok := modRunner.(modules.HasParamsCreator); !ok {
 					fmt.Println(operation.Module, "module does not provide a parameters creator.")
 					fmt.Println("You can write your action by hand and import it using 'load <file>'")
 					break
 				}
-				operation.Parameters, err = modRunner.(mig.HasParamsCreator).ParamsCreator()
+				operation.Parameters, err = modRunner.(modules.HasParamsCreator).ParamsCreator()
 				if err != nil {
 					fmt.Printf("Parameters creation failed with error: %v\n", err)
 					break
diff --git a/src/mig/modules/file/file.go b/src/mig/modules/file/file.go
index 93f0e101..f9c130be 100644
--- a/src/mig/modules/file/file.go
+++ b/src/mig/modules/file/file.go
@@ -22,7 +22,7 @@ import (
 	"fmt"
 	"hash"
 	"io"
-	"mig"
+	"mig/modules"
 	"os"
 	"path"
 	"path/filepath"
@@ -36,14 +36,14 @@ import (
 var debug bool = false
 
 func init() {
-	mig.RegisterModule("file", func() interface{} {
+	modules.Register("file", func() interface{} {
 		return new(Runner)
-	}, false)
+	})
 }
 
 type Runner struct {
 	Parameters Parameters
-	Results    Results
+	Results    modules.Result
 }
 
 type Parameters struct {
@@ -618,7 +618,7 @@ var stats statistics
 
 var walkingErrors []string
 
-func (r Runner) Run(Args []byte) (resStr string) {
+func (r Runner) Run() (resStr string) {
 	var (
 		roots     []string
 		traversed []string
@@ -639,7 +639,7 @@ func (r Runner) Run(Args []byte) (resStr string) {
 		}
 	}()
 	t0 := time.Now()
-	err := json.Unmarshal(Args, &r.Parameters)
+	err := modules.ReadInputParameters(&r.Parameters)
 	if err != nil {
 		panic(err)
 	}
@@ -720,7 +720,9 @@ func (r Runner) Run(Args []byte) (resStr string) {
 
 	if debug {
 		fmt.Println("---- results ----")
-		printedResults, err := r.PrintResults([]byte(resStr), false)
+		var tmpres modules.Result
+		err = json.Unmarshal([]byte(resStr), &tmpres)
+		printedResults, err := r.PrintResults(tmpres, false)
 		if err != nil {
 			panic(err)
 		}
@@ -1292,15 +1294,7 @@ func getHash(file string, hashType checkType) (hexhash string, err error) {
 	return
 }
 
-type Results struct {
-	FoundAnything bool          `json:"foundanything"`
-	Success       bool          `json:"success"`
-	Elements      searchresults `json:"elements"`
-	Statistics    statistics    `json:"statistics"`
-	Errors        []string      `json:"error"`
-}
-
-type searchresults map[string]searchresult
+type SearchResults map[string]searchresult
 
 type searchresult []matchedfile
 
@@ -1317,8 +1311,8 @@ type fileinfo struct {
 }
 
 // newResults allocates a Results structure
-func newResults() *Results {
-	return &Results{Elements: make(searchresults), FoundAnything: false}
+func newResults() *modules.Result {
+	return &modules.Result{Elements: make(SearchResults), FoundAnything: false}
 }
 
 func (r Runner) buildResults(t0 time.Time) (resStr string, err error) {
@@ -1328,6 +1322,7 @@ func (r Runner) buildResults(t0 time.Time) (resStr string, err error) {
 		}
 	}()
 	res := newResults()
+	elements := res.Elements.(SearchResults)
 	for label, search := range r.Parameters.Searches {
 		var sr searchresult
 		// first pass on the results: if matchall is set, verify that all
@@ -1462,7 +1457,7 @@ func (r Runner) buildResults(t0 time.Time) (resStr string, err error) {
 			}
 		}
 	nextsearch:
-		res.Elements[label] = sr
+		elements[label] = sr
 	}
 
 	// calculate execution time
@@ -1501,13 +1496,21 @@ func (r Runner) buildResults(t0 time.Time) (resStr string, err error) {
 // only results that have at least one match are returned.
 // If foundOnly is not set, all results are returned, along with errors and
 // statistics.
-func (r Runner) PrintResults(rawResults []byte, foundOnly bool) (prints []string, err error) {
-	var results Results
-	err = json.Unmarshal(rawResults, &results)
+func (r Runner) PrintResults(result modules.Result, foundOnly bool) (prints []string, err error) {
+	var (
+		el    SearchResults
+		stats statistics
+	)
+	err = result.GetElements(&el)
 	if err != nil {
 		panic(err)
 	}
-	for label, sr := range results.Elements {
+	err = result.GetStatistics(&stats)
+	if err != nil {
+		panic(err)
+	}
+
+	for label, sr := range el {
 		for _, mf := range sr {
 			var out string
 			if mf.File == "" {
@@ -1571,12 +1574,12 @@ func (r Runner) PrintResults(rawResults []byte, foundOnly bool) (prints []string
 		}
 	}
 	if !foundOnly {
-		for _, we := range results.Errors {
+		for _, we := range result.Errors {
 			prints = append(prints, we)
 		}
 		stat := fmt.Sprintf("Statistics: %.0f files checked, %.0f failed to open, %.0f matched, ran in %s.",
-			results.Statistics.Filescount, results.Statistics.Openfailed,
-			results.Statistics.Totalhits, results.Statistics.Exectime)
+			stats.Filescount, stats.Openfailed,
+			stats.Totalhits, stats.Exectime)
 		prints = append(prints, stat)
 	}
 	return
diff --git a/src/mig/modules/modules.go b/src/mig/modules/modules.go
index 69c38c79..4b2dba09 100644
--- a/src/mig/modules/modules.go
+++ b/src/mig/modules/modules.go
@@ -15,8 +15,8 @@ import (
 
 // Message defines the input messages received by modules.
 type Message struct {
-	Class      string      // represent the type of message being passed to the module
-	Parameters interface{} // for `parameters` class, this interface contains the module parameters
+	Class      string      `json:"class"`      // represent the type of message being passed to the module
+	Parameters interface{} `json:"parameters"` // for `parameters` class, this interface contains the module parameters
 }
 
 const (
@@ -74,6 +74,12 @@ type Moduler interface {
 	ValidateParameters() error
 }
 
+func MakeParametersMessage(params interface{}) (ret Message) {
+	ret.Class = MsgClassParameters
+	ret.Parameters = params
+	return
+}
+
 // ReadInput reads one line of input from stdin, unmarshal it into a modules.Message
 // and returns the message to the caller
 func ReadInput() (msg Message, err error) {
diff --git a/src/mig/scheduler/scheduler.go b/src/mig/scheduler/scheduler.go
index caadd1e0..dfe0f973 100644
--- a/src/mig/scheduler/scheduler.go
+++ b/src/mig/scheduler/scheduler.go
@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"github.com/streadway/amqp"
 	"mig"
+	"mig/modules"
 	"mig/pgp"
 	"os"
 	"runtime"
@@ -133,7 +134,7 @@ func processNewAction(actionPath string, ctx Context) (err error) {
 	ctx.Channels.Log <- mig.Log{OpID: ctx.OpID, ActionID: action.ID, Desc: "Action written to database"}.Debug()
 
 	// create an array of empty results to serve as default for all commands
-	emptyResults := make([]mig.ModuleResult, len(action.Operations))
+	emptyResults := make([]modules.Result, len(action.Operations))
 	created := 0
 	for _, agent := range agents {
 		err := createCommand(ctx, action, agent, emptyResults)
@@ -161,7 +162,7 @@ func processNewAction(actionPath string, ctx Context) (err error) {
 	return
 }
 
-func createCommand(ctx Context, action mig.Action, agent mig.Agent, emptyResults []mig.ModuleResult) (err error) {
+func createCommand(ctx Context, action mig.Action, agent mig.Agent, emptyResults []modules.Result) (err error) {
 	cmdid := mig.GenID()
 	defer func() {
 		if e := recover(); e != nil {
diff --git a/src/mig/workers/compliance_item/main.go b/src/mig/workers/compliance_item/main.go
index f3d0d67f..c1f8ccff 100644
--- a/src/mig/workers/compliance_item/main.go
+++ b/src/mig/workers/compliance_item/main.go
@@ -13,6 +13,7 @@ import (
 	"github.com/jvehent/gozdef"
 	"mig"
 	"mig/event"
+	"mig/modules"
 	"mig/modules/file"
 	"mig/workers"
 	"os"
@@ -141,12 +142,17 @@ func makeComplianceItem(cmd mig.Command, conf Config) (items []gozdef.Compliance
 		}
 		switch cmd.Action.Operations[i].Module {
 		case "file":
-			var r file.Results
+			var r modules.Result
+			var el file.SearchResults
 			err = json.Unmarshal(buf, &r)
 			if err != nil {
 				return items, err
 			}
-			for label, sr := range r.Elements {
+			err = r.GetElements(&el)
+			if err != nil {
+				return items, err
+			}
+			for label, sr := range el {
 				for _, mf := range sr {
 					ci.Check.Location = mf.File
 					ci.Check.Name = label