Merge pull request 'API d’introspection des définitions de spécifications' (#23) from spec-def-api into master

Reviewed-on: #23

Makefile

@@ -20,6 +20,7 @@ clean:
 	rm -f emissary.sqlite*
 	rm -f server-key.json
 	rm -f agent-key.json
+	rm -f state.json
 
 .PHONY: test
 test: test-go ## Executing tests

internal/agent/controller/app/controller.go

@@ -38,7 +38,7 @@ func (c *Controller) Name() string {
 func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
 	appSpec := spec.NewSpec()
 
-	if err := state.GetSpec(spec.Name, appSpec); err != nil {
+	if err := state.GetSpec(spec.Name, spec.Version, appSpec); err != nil {
 		if errors.Is(err, agent.ErrSpecNotFound) {
 			logger.Info(ctx, "could not find app spec")
 
@@ -50,7 +50,12 @@ func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
 		return errors.WithStack(err)
 	}
 
-	logger.Info(ctx, "retrieved spec", logger.F("spec", appSpec.SpecName()), logger.F("revision", appSpec.SpecRevision()))
+	logger.Info(
+		ctx, "retrieved spec",
+		logger.F("name", appSpec.SpecDefinitionName()),
+		logger.F("version", appSpec.SpecDefinitionVersion()),
+		logger.F("revision", appSpec.SpecRevision()),
+	)
 
 	c.updateApps(ctx, appSpec)
 

internal/agent/controller/app/spec/init.go

@@ -11,7 +11,7 @@ import (
 var schema []byte
 
 func init() {
-	if err := spec.Register(Name, schema); err != nil {
+	if err := spec.Register(string(Name), Version, schema); err != nil {
 		panic(errors.WithStack(err))
 	}
 }

internal/agent/controller/app/spec/schema.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
     "$id": "https://app.edge.emissary.cadoles.com/spec.json",
     "title": "AppSpec",
     "description": "Emissary 'App' specification",
@@ -78,7 +78,9 @@
                             "type": "string"
                         }
                     },
-                    "required": ["defaultUrlTemplate"],
+                    "required": [
+                        "defaultUrlTemplate"
+                    ],
                     "additionalProperties": false
                 },
                 "unexpectedHostRedirect": {
@@ -94,7 +96,10 @@
                             "type": "string"
                         }
                     },
-                    "required": ["acceptedHostPatterns", "hostTarget"],
+                    "required": [
+                        "acceptedHostPatterns",
+                        "hostTarget"
+                    ],
                     "additionalProperties": false
                 },
                 "auth": {
@@ -104,7 +109,10 @@
                             "type": "object",
                             "properties": {
                                 "key": {
-                                    "type": ["object", "string"]
+                                    "type": [
+                                        "object",
+                                        "string"
+                                    ]
                                 },
                                 "signingAlgorithm": {
                                     "type": "string"

internal/agent/controller/app/spec/spec.go

@@ -6,7 +6,10 @@ import (
 	"github.com/lestrrat-go/jwx/v2/jwa"
 )
 
-const Name spec.Name = "app.emissary.cadoles.com"
+const (
+	Name    string = "app.emissary.cadoles.com"
+	Version string = "0.0.0"
+)
 
 type Spec struct {
 	Revision int                 `json:"revision"`
@@ -56,10 +59,14 @@ type AppURLResolving struct {
 	DefaultURLTemplate string            `json:"defaultUrlTemplate"`
 }
 
-func (s *Spec) SpecName() spec.Name {
+func (s *Spec) SpecDefinitionName() string {
 	return Name
 }
 
+func (s *Spec) SpecDefinitionVersion() string {
+	return Version
+}
+
 func (s *Spec) SpecRevision() int {
 	return s.Revision
 }

internal/agent/controller/app/spec/validator_test.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"testing"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/memory"
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
@@ -27,11 +28,15 @@ var validatorTestCases = []validatorTestCase{
 func TestValidator(t *testing.T) {
 	t.Parallel()
 
-	validator := spec.NewValidator()
-	if err := validator.Register(Name, schema); err != nil {
+	ctx := context.Background()
+
+	repo := memory.NewSpecDefinitionRepository()
+	if _, err := repo.Upsert(ctx, Name, Version, schema); err != nil {
 		t.Fatalf("+%v", errors.WithStack(err))
 	}
 
+	validator := spec.NewValidator(repo)
+
 	for _, tc := range validatorTestCases {
 		func(tc validatorTestCase) {
 			t.Run(tc.Name, func(t *testing.T) {

internal/agent/controller/mdns/controller.go

@@ -33,7 +33,7 @@ func (c *Controller) Name() string {
 func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
 	mdnsSpec := mdns.NewSpec()
 
-	if err := state.GetSpec(mdns.Name, mdnsSpec); err != nil {
+	if err := state.GetSpec(mdns.Name, mdns.Version, mdnsSpec); err != nil {
 		if errors.Is(err, agent.ErrSpecNotFound) {
 			logger.Info(ctx, "could not find mdns spec")
 
@@ -45,7 +45,11 @@ func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
 		return errors.WithStack(err)
 	}
 
-	logger.Info(ctx, "retrieved spec", logger.F("spec", mdnsSpec.SpecName()), logger.F("revision", mdnsSpec.SpecRevision()))
+	logger.Info(ctx, "retrieved spec",
+		logger.F("name", mdnsSpec.SpecDefinitionName()),
+		logger.F("version", mdnsSpec.SpecDefinitionVersion()),
+		logger.F("revision", mdnsSpec.SpecRevision()),
+	)
 
 	if err := c.updateResponder(ctx, mdnsSpec); err != nil {
 		return errors.Wrap(err, "could not update responder")

internal/agent/controller/mdns/spec/init.go

@@ -11,7 +11,7 @@ import (
 var schema []byte
 
 func init() {
-	if err := spec.Register(Name, schema); err != nil {
+	if err := spec.Register(string(Name), Version, schema); err != nil {
 		panic(errors.WithStack(err))
 	}
 }

internal/agent/controller/mdns/spec/schema.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
     "$id": "https://mdns.edge.emissary.cadoles.com/spec.json",
     "title": "MDNSSpec",
     "description": "Emissary 'MDNS' specification",

internal/agent/controller/mdns/spec/spec.go

@@ -4,7 +4,10 @@ import (
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 )
 
-const Name spec.Name = "mdns.emissary.cadoles.com"
+const (
+	Name    string = "mdns.emissary.cadoles.com"
+	Version string = "0.0.0"
+)
 
 type Spec struct {
 	Revision int                `json:"revision"`
@@ -19,10 +22,14 @@ type Service struct {
 	Port   int      `json:"port"`
 }
 
-func (s *Spec) SpecName() spec.Name {
+func (s *Spec) SpecDefinitionName() string {
 	return Name
 }
 
+func (s *Spec) SpecDefinitionVersion() string {
+	return Version
+}
+
 func (s *Spec) SpecRevision() int {
 	return s.Revision
 }

internal/agent/controller/mdns/spec/validator_test.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"testing"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/memory"
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
@@ -27,11 +28,15 @@ var validatorTestCases = []validatorTestCase{
 func TestValidator(t *testing.T) {
 	t.Parallel()
 
-	validator := spec.NewValidator()
-	if err := validator.Register(Name, schema); err != nil {
+	ctx := context.Background()
+
+	repo := memory.NewSpecDefinitionRepository()
+	if _, err := repo.Upsert(ctx, Name, Version, schema); err != nil {
 		t.Fatalf("+%v", errors.WithStack(err))
 	}
 
+	validator := spec.NewValidator(repo)
+
 	for _, tc := range validatorTestCases {
 		func(tc validatorTestCase) {
 			t.Run(tc.Name, func(t *testing.T) {

internal/agent/controller/openwrt/spec/sysupgrade/init.go

@@ -11,7 +11,7 @@ import (
 var schema []byte
 
 func init() {
-	if err := spec.Register(Name, schema); err != nil {
+	if err := spec.Register(string(Name), Version, schema); err != nil {
 		panic(errors.WithStack(err))
 	}
 }

internal/agent/controller/openwrt/spec/sysupgrade/schema.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
     "$id": "https://sysupgrade.openwrt.emissary.cadoles.com/spec.json",
     "title": "SysUpgradeSpec",
     "description": "Emissary 'SysUpgrade' specification",
@@ -15,6 +15,10 @@
             "type": "string"
         }
     },
-    "required": ["url", "sha256sum", "version"],
+    "required": [
+        "url",
+        "sha256sum",
+        "version"
+    ],
     "additionalProperties": false
 }

internal/agent/controller/openwrt/spec/sysupgrade/spec.go

@@ -4,7 +4,10 @@ import (
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 )
 
-const Name spec.Name = "sysupgrade.openwrt.emissary.cadoles.com"
+const (
+	Name    string = "sysupgrade.openwrt.emissary.cadoles.com"
+	Version string = "0.0.0"
+)
 
 type Spec struct {
 	Revision  int    `json:"revision"`
@@ -13,10 +16,14 @@ type Spec struct {
 	Version   string `json:"version"`
 }
 
-func (s *Spec) SpecName() spec.Name {
+func (s *Spec) SpecDefinitionName() string {
 	return Name
 }
 
+func (s *Spec) SpecDefinitionVersion() string {
+	return Version
+}
+
 func (s *Spec) SpecRevision() int {
 	return s.Revision
 }

internal/agent/controller/openwrt/spec/sysupgrade/validator_test.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"testing"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/memory"
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
@@ -27,11 +28,15 @@ var validatorTestCases = []validatorTestCase{
 func TestValidator(t *testing.T) {
 	t.Parallel()
 
-	validator := spec.NewValidator()
-	if err := validator.Register(Name, schema); err != nil {
+	ctx := context.Background()
+
+	repo := memory.NewSpecDefinitionRepository()
+	if _, err := repo.Upsert(ctx, Name, Version, schema); err != nil {
 		t.Fatalf("+%v", errors.WithStack(err))
 	}
 
+	validator := spec.NewValidator(repo)
+
 	for _, tc := range validatorTestCases {
 		func(tc validatorTestCase) {
 			t.Run(tc.Name, func(t *testing.T) {

internal/agent/controller/openwrt/sysupgrade_controller.go

@@ -31,7 +31,7 @@ func (*SysUpgradeController) Name() string {
 func (c *SysUpgradeController) Reconcile(ctx context.Context, state *agent.State) error {
 	sysSpec := sysupgrade.NewSpec()
 
-	if err := state.GetSpec(sysupgrade.Name, sysSpec); err != nil {
+	if err := state.GetSpec(sysupgrade.Name, sysupgrade.Version, sysSpec); err != nil {
 		if errors.Is(err, agent.ErrSpecNotFound) {
 			logger.Info(ctx, "could not find sysupgrade spec, doing nothing")
 

internal/agent/controller/openwrt/uci_controller.go

@@ -27,7 +27,7 @@ func (*UCIController) Name() string {
 func (c *UCIController) Reconcile(ctx context.Context, state *agent.State) error {
 	uciSpec := ucispec.NewSpec()
 
-	if err := state.GetSpec(ucispec.NameUCI, uciSpec); err != nil {
+	if err := state.GetSpec(ucispec.Name, ucispec.Version, uciSpec); err != nil {
 		if errors.Is(err, agent.ErrSpecNotFound) {
 			logger.Info(ctx, "could not find uci spec, doing nothing")
 
@@ -37,7 +37,11 @@ func (c *UCIController) Reconcile(ctx context.Context, state *agent.State) error
 		return errors.WithStack(err)
 	}
 
-	logger.Info(ctx, "retrieved spec", logger.F("spec", uciSpec.SpecName()), logger.F("revision", uciSpec.SpecRevision()))
+	logger.Info(ctx, "retrieved spec",
+		logger.F("name", uciSpec.SpecDefinitionName()),
+		logger.F("version", uciSpec.SpecDefinitionVersion()),
+		logger.F("revision", uciSpec.SpecRevision()),
+	)
 
 	if c.currentSpecRevision == uciSpec.SpecRevision() {
 		logger.Info(ctx, "spec revision did not change, doing nothing")

internal/agent/controller/persistence/controller.go

@@ -9,13 +9,12 @@ import (
 	"path/filepath"
 
 	"forge.cadoles.com/Cadoles/emissary/internal/agent"
-	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 	"gitlab.com/wpetit/goweb/logger"
 )
 
 type Controller struct {
-	trackedSpecRevisions map[spec.Name]int
+	trackedSpecRevisions map[string]map[string]int
 	filename             string
 	loaded               bool
 }
@@ -78,36 +77,39 @@ func (c *Controller) specChanged(specs agent.Specs) bool {
 		return true
 	}
 
-	for name, spec := range specs {
-		trackedRevision, exists := c.trackedSpecRevisions[name]
+	for name, specVersions := range specs {
+		trackedSpecs, exists := c.trackedSpecRevisions[name]
 		if !exists {
 			return true
 		}
 
-		if trackedRevision != spec.SpecRevision() {
-			return true
-		}
-	}
+		for version, spec := range specVersions {
+			trackedRevision, exists := trackedSpecs[version]
+			if !exists {
+				return true
+			}
 
-	for trackedSpecName, trackedRevision := range c.trackedSpecRevisions {
-		spec, exists := specs[trackedSpecName]
-		if !exists {
-			return true
+			if trackedRevision != spec.SpecRevision() {
+				return true
+			}
 		}
 
-		if trackedRevision != spec.SpecRevision() {
-			return true
-		}
 	}
 
 	return false
 }
 
 func (c *Controller) trackSpecsRevisions(specs agent.Specs) {
-	c.trackedSpecRevisions = make(map[spec.Name]int)
+	c.trackedSpecRevisions = make(map[string]map[string]int)
 
-	for name, spec := range specs {
-		c.trackedSpecRevisions[name] = spec.SpecRevision()
+	for name, specVersions := range specs {
+		if _, exists := c.trackedSpecRevisions[name]; !exists {
+			c.trackedSpecRevisions[name] = make(map[string]int)
+		}
+
+		for version, spec := range specVersions {
+			c.trackedSpecRevisions[name][version] = spec.SpecRevision()
+		}
 	}
 }
 
@@ -167,7 +169,7 @@ func (c *Controller) writeState(ctx context.Context, state *agent.State) error {
 	}
 
 	name := f.Name()
-	if err := ioutil.WriteFile(name, data, os.ModePerm); err != nil {
+	if err := os.WriteFile(name, data, os.ModePerm); err != nil {
 		return errors.Errorf("cannot write data to temporary file %q: %v", name, err)
 	}
 
@@ -213,7 +215,7 @@ func (c *Controller) writeState(ctx context.Context, state *agent.State) error {
 func NewController(filename string) *Controller {
 	return &Controller{
 		filename:             filename,
-		trackedSpecRevisions: make(map[spec.Name]int),
+		trackedSpecRevisions: make(map[string]map[string]int),
 	}
 }
 

internal/agent/controller/proxy/controller.go

@@ -30,7 +30,7 @@ func (c *Controller) Name() string {
 func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
 	proxySpec := spec.NewSpec()
 
-	if err := state.GetSpec(spec.NameProxy, proxySpec); err != nil {
+	if err := state.GetSpec(spec.Name, spec.Version, proxySpec); err != nil {
 		if errors.Is(err, agent.ErrSpecNotFound) {
 			logger.Info(ctx, "could not find proxy spec")
 
@@ -42,7 +42,12 @@ func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
 		return errors.WithStack(err)
 	}
 
-	logger.Info(ctx, "retrieved spec", logger.F("spec", proxySpec.SpecName()), logger.F("revision", proxySpec.SpecRevision()))
+	logger.Info(
+		ctx, "retrieved spec",
+		logger.F("name", proxySpec.SpecDefinitionName()),
+		logger.F("version", proxySpec.SpecDefinitionVersion()),
+		logger.F("revision", proxySpec.SpecRevision()),
+	)
 
 	c.updateProxies(ctx, proxySpec)
 

internal/agent/state.go

@@ -11,7 +11,7 @@ import (
 
 var ErrSpecNotFound = errors.New("spec not found")
 
-type Specs map[spec.Name]spec.Spec
+type Specs map[string]map[string]spec.Spec
 
 type State struct {
 	agentID datastore.AgentID
@@ -20,25 +20,33 @@ type State struct {
 
 func NewState() *State {
 	return &State{
-		specs: make(map[spec.Name]spec.Spec),
+		specs: make(map[string]map[string]spec.Spec),
 	}
 }
 
 func (s *State) MarshalJSON() ([]byte, error) {
 	state := struct {
-		ID    datastore.AgentID           `json:"agentId"`
-		Specs map[spec.Name]*spec.RawSpec `json:"specs"`
+		ID    datastore.AgentID                   `json:"agentId"`
+		Specs map[string]map[string]*spec.RawSpec `json:"specs"`
 	}{
 		ID: s.agentID,
-		Specs: func(specs map[spec.Name]spec.Spec) map[spec.Name]*spec.RawSpec {
-			rawSpecs := make(map[spec.Name]*spec.RawSpec)
+		Specs: func(specs map[string]map[string]spec.Spec) map[string]map[string]*spec.RawSpec {
+			rawSpecs := make(map[string]map[string]*spec.RawSpec)
 
-			for name, sp := range specs {
-				rawSpecs[name] = &spec.RawSpec{
-					Name:     sp.SpecName(),
-					Revision: sp.SpecRevision(),
-					Data:     sp.SpecData(),
+			for name, versions := range specs {
+				if _, exists := rawSpecs[name]; !exists {
+					rawSpecs[name] = make(map[string]*spec.RawSpec)
 				}
+
+				for version, sp := range versions {
+					rawSpecs[name][version] = &spec.RawSpec{
+						DefinitionName:    sp.SpecDefinitionName(),
+						DefinitionVersion: sp.SpecDefinitionVersion(),
+						Revision:          sp.SpecRevision(),
+						Data:              sp.SpecData(),
+					}
+				}
+
 			}
 
 			return rawSpecs
@@ -55,19 +63,24 @@ func (s *State) MarshalJSON() ([]byte, error) {
 
 func (s *State) UnmarshalJSON(data []byte) error {
 	state := struct {
-		AgentID datastore.AgentID           `json:"agentId"`
-		Specs   map[spec.Name]*spec.RawSpec `json:"specs"`
+		AgentID datastore.AgentID                   `json:"agentId"`
+		Specs   map[string]map[string]*spec.RawSpec `json:"specs"`
 	}{}
 
 	if err := json.Unmarshal(data, &state); err != nil {
 		return errors.WithStack(err)
 	}
 
-	s.specs = func(rawSpecs map[spec.Name]*spec.RawSpec) Specs {
+	s.specs = func(rawSpecs map[string]map[string]*spec.RawSpec) Specs {
 		specs := make(Specs)
 
-		for name, raw := range rawSpecs {
-			specs[name] = spec.Spec(raw)
+		for name, versions := range rawSpecs {
+			if _, exists := specs[name]; !exists {
+				specs[name] = make(map[string]spec.Spec)
+			}
+			for version, raw := range versions {
+				specs[name][version] = spec.Spec(raw)
+			}
 		}
 
 		return specs
@@ -85,23 +98,36 @@ func (s *State) Specs() Specs {
 }
 
 func (s *State) ClearSpecs() *State {
-	s.specs = make(map[spec.Name]spec.Spec)
+	s.specs = make(map[string]map[string]spec.Spec)
 
 	return s
 }
 
 func (s *State) SetSpec(sp spec.Spec) *State {
 	if s.specs == nil {
-		s.specs = make(map[spec.Name]spec.Spec)
+		s.specs = make(map[string]map[string]spec.Spec)
 	}
 
-	s.specs[sp.SpecName()] = sp
+	name := sp.SpecDefinitionName()
+
+	if _, exists := s.specs[name]; !exists {
+		s.specs[name] = make(map[string]spec.Spec)
+	}
+
+	version := sp.SpecDefinitionVersion()
+
+	s.specs[name][version] = sp
 
 	return s
 }
 
-func (s *State) GetSpec(name spec.Name, dest any) error {
-	spec, exists := s.specs[name]
+func (s *State) GetSpec(name string, version string, dest any) error {
+	versions, exists := s.specs[name]
+	if !exists {
+		return errors.WithStack(ErrSpecNotFound)
+	}
+
+	spec, exists := versions[version]
 	if !exists {
 		return errors.WithStack(ErrSpecNotFound)
 	}

internal/command/client/agent/spec/delete.go

@@ -6,7 +6,6 @@ import (
 	agentFlag "forge.cadoles.com/Cadoles/emissary/internal/command/client/agent/flag"
 	"forge.cadoles.com/Cadoles/emissary/internal/command/client/apierr"
 	clientFlag "forge.cadoles.com/Cadoles/emissary/internal/command/client/flag"
-	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"forge.cadoles.com/Cadoles/emissary/pkg/client"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli/v2"
@@ -23,6 +22,11 @@ func DeleteCommand() *cli.Command {
 				Name:  "spec-name",
 				Usage: "use `NAME` as specification's name",
 			},
+			&cli.StringFlag{
+				Name:  "spec-version",
+				Usage: "use `VERSION` as specification's version",
+				Value: "0.0.0",
+			},
 		),
 		Action: func(ctx *cli.Context) error {
 			baseFlags := clientFlag.GetBaseFlags(ctx)
@@ -37,14 +41,19 @@ func DeleteCommand() *cli.Command {
 				return errors.WithStack(err)
 			}
 
-			specName, err := assertSpecName(ctx)
+			specDefName, err := assertSpecDefName(ctx)
+			if err != nil {
+				return errors.WithStack(err)
+			}
+
+			specDefVersion, err := assertSpecDefVersion(ctx)
 			if err != nil {
 				return errors.WithStack(err)
 			}
 
 			client := client.New(baseFlags.ServerURL, client.WithToken(token))
 
-			specName, err = client.DeleteAgentSpec(ctx.Context, agentID, specName)
+			specDefName, specDefVersion, err = client.DeleteAgentSpec(ctx.Context, agentID, specDefName, specDefVersion)
 			if err != nil {
 				return errors.WithStack(apierr.Wrap(err))
 			}
@@ -54,9 +63,11 @@ func DeleteCommand() *cli.Command {
 			}
 
 			if err := format.Write(baseFlags.Format, os.Stdout, hints, struct {
-				Name spec.Name `json:"name"`
+				Name    string `json:"name"`
+				Version string `json:"version"`
 			}{
-				Name: specName,
+				Name:    specDefName,
+				Version: specDefVersion,
 			}); err != nil {
 				return errors.WithStack(err)
 			}

internal/command/client/agent/spec/get.go

@@ -36,9 +36,7 @@ func GetCommand() *cli.Command {
 				return errors.WithStack(apierr.Wrap(err))
 			}
 
-			hints := format.Hints{
-				OutputMode: baseFlags.OutputMode,
-			}
+			hints := specHints(baseFlags.OutputMode)
 
 			if err := format.Write(baseFlags.Format, os.Stdout, hints, clientFlag.AsAnySlice(specs)...); err != nil {
 				return errors.WithStack(err)

internal/command/client/agent/spec/hints.go

@@ -0,0 +1,21 @@
+package spec
+
+import (
+	"gitlab.com/wpetit/goweb/cli/format"
+	"gitlab.com/wpetit/goweb/cli/format/table"
+)
+
+func specHints(outputMode format.OutputMode) format.Hints {
+	return format.Hints{
+		OutputMode: outputMode,
+		Props: []format.Prop{
+			format.NewProp("ID", "ID"),
+			format.NewProp("Revision", "Revision"),
+			format.NewProp("DefinitionName", "Def. Name"),
+			format.NewProp("DefinitionVersion", "Def. Version"),
+			format.NewProp("Data", "Data"),
+			format.NewProp("CreatedAt", "CreatedAt", table.WithCompactModeMaxColumnWidth(20)),
+			format.NewProp("UpdatedAt", "UpdatedAt", table.WithCompactModeMaxColumnWidth(20)),
+		},
+	}
+}

internal/command/client/agent/spec/update.go

@@ -24,6 +24,11 @@ func UpdateCommand() *cli.Command {
 				Name:  "spec-name",
 				Usage: "use `NAME` as specification's name",
 			},
+			&cli.StringFlag{
+				Name:  "spec-version",
+				Usage: "use `VERSION` as specification's version",
+				Value: "0.0.0",
+			},
 			&cli.StringFlag{
 				Name:  "spec-data",
 				Usage: "use `DATA` as specification's data, '-' to read from STDIN",
@@ -44,7 +49,12 @@ func UpdateCommand() *cli.Command {
 				return errors.WithStack(err)
 			}
 
-			specName, err := assertSpecName(ctx)
+			specDefName, err := assertSpecDefName(ctx)
+			if err != nil {
+				return errors.WithStack(err)
+			}
+
+			specDefVersion, err := assertSpecDefVersion(ctx)
 			if err != nil {
 				return errors.WithStack(err)
 			}
@@ -71,7 +81,7 @@ func UpdateCommand() *cli.Command {
 			var existingSpec spec.Spec
 
 			for _, s := range specs {
-				if s.SpecName() != specName {
+				if s.SpecDefinitionName() != specDefName || s.SpecDefinitionVersion() != specDefVersion {
 					continue
 				}
 
@@ -100,13 +110,10 @@ func UpdateCommand() *cli.Command {
 			}
 
 			rawSpec := &spec.RawSpec{
-				Name:     specName,
-				Revision: revision,
-				Data:     specData,
-			}
-
-			if err := spec.Validate(ctx.Context, rawSpec); err != nil {
-				return errors.WithStack(apierr.Wrap(err))
+				DefinitionName:    specDefName,
+				DefinitionVersion: specDefVersion,
+				Revision:          revision,
+				Data:              specData,
 			}
 
 			spec, err := client.UpdateAgentSpec(ctx.Context, agentID, rawSpec)
@@ -114,9 +121,7 @@ func UpdateCommand() *cli.Command {
 				return errors.WithStack(apierr.Wrap(err))
 			}
 
-			hints := format.Hints{
-				OutputMode: baseFlags.OutputMode,
-			}
+			hints := specHints(baseFlags.OutputMode)
 
 			if err := format.Write(baseFlags.Format, os.Stdout, hints, spec); err != nil {
 				return errors.WithStack(err)
@@ -127,14 +132,24 @@ func UpdateCommand() *cli.Command {
 	}
 }
 
-func assertSpecName(ctx *cli.Context) (spec.Name, error) {
-	specName := ctx.String("spec-name")
+func assertSpecDefName(ctx *cli.Context) (string, error) {
+	specDefName := ctx.String("spec-name")
 
-	if specName == "" {
+	if specDefName == "" {
 		return "", errors.New("flag 'spec-name' is required")
 	}
 
-	return spec.Name(specName), nil
+	return specDefName, nil
+}
+
+func assertSpecDefVersion(ctx *cli.Context) (string, error) {
+	specDefVersion := ctx.String("spec-version")
+
+	if specDefVersion == "" {
+		return "", errors.New("flag 'spec-name' is required")
+	}
+
+	return specDefVersion, nil
 }
 
 func assertSpecData(ctx *cli.Context) (map[string]any, error) {

internal/datastore/agent_repository.go

@@ -18,9 +18,9 @@ type AgentRepository interface {
 	Query(ctx context.Context, opts ...AgentQueryOptionFunc) ([]*Agent, int, error)
 	Delete(ctx context.Context, id AgentID) error
 
-	UpdateSpec(ctx context.Context, id AgentID, name string, revision int, data map[string]any) (*Spec, error)
+	UpdateSpec(ctx context.Context, id AgentID, name string, version string, revision int, data map[string]any) (*Spec, error)
 	GetSpecs(ctx context.Context, id AgentID) ([]*Spec, error)
-	DeleteSpec(ctx context.Context, id AgentID, name string) error
+	DeleteSpec(ctx context.Context, id AgentID, name string, version string) error
 }
 
 type AgentQueryOptionFunc func(*AgentQueryOptions)

internal/datastore/memory/spec_definition_repository.go

@@ -0,0 +1,166 @@
+package memory
+
+import (
+	"context"
+	"slices"
+	"sync"
+	"time"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+	"github.com/pkg/errors"
+)
+
+type specDefRecord struct {
+	Schema    []byte
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
+type SpecDefinitionRepository struct {
+	definitions map[string]map[string]specDefRecord
+	mutex       sync.RWMutex
+}
+
+// Delete implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Delete(ctx context.Context, name string, version string) error {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	versions, exists := r.definitions[name]
+	if !exists {
+		return nil
+	}
+
+	delete(versions, version)
+
+	r.definitions[name] = versions
+
+	return nil
+}
+
+// Get implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Get(ctx context.Context, name string, version string) (*datastore.SpecDefinition, error) {
+	r.mutex.RLock()
+	defer r.mutex.RUnlock()
+
+	versions, exists := r.definitions[name]
+	if !exists {
+		return nil, errors.WithStack(datastore.ErrNotFound)
+	}
+
+	rec, exists := versions[version]
+	if !exists {
+		return nil, errors.WithStack(datastore.ErrNotFound)
+	}
+
+	specDef := datastore.SpecDefinition{
+		SpecDefinitionHeader: datastore.SpecDefinitionHeader{
+			Name:      name,
+			Version:   version,
+			CreatedAt: rec.CreatedAt,
+			UpdatedAt: rec.UpdatedAt,
+		},
+		Schema: rec.Schema[:],
+	}
+
+	return &specDef, nil
+}
+
+// Query implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Query(ctx context.Context, opts ...datastore.SpecDefinitionQueryOptionFunc) ([]datastore.SpecDefinitionHeader, int, error) {
+	options := &datastore.SpecDefinitionQueryOptions{}
+	for _, fn := range opts {
+		fn(options)
+	}
+
+	r.mutex.RLock()
+	defer r.mutex.RUnlock()
+
+	specDefs := make([]datastore.SpecDefinitionHeader, 0)
+	count := 0
+
+	for name, versions := range r.definitions {
+		for version, rec := range versions {
+			count++
+
+			matches := true
+
+			if options.Names != nil && !slices.Contains(options.Names, name) {
+				matches = false
+			}
+
+			if options.Versions != nil && !slices.Contains(options.Versions, version) {
+				matches = false
+			}
+
+			if options.Offset != nil && count < *options.Offset {
+				matches = false
+			}
+
+			if options.Limit != nil && len(specDefs) >= *options.Limit {
+				matches = false
+			}
+
+			if !matches {
+				continue
+			}
+
+			specDefs = append(specDefs, datastore.SpecDefinitionHeader{
+				Name:      name,
+				Version:   version,
+				CreatedAt: rec.CreatedAt,
+				UpdatedAt: rec.UpdatedAt,
+			})
+		}
+	}
+
+	return specDefs, count, nil
+}
+
+// Upsert implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Upsert(ctx context.Context, name string, version string, schema []byte) (*datastore.SpecDefinition, error) {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	versions, exists := r.definitions[name]
+	if !exists {
+		versions = make(map[string]specDefRecord)
+	}
+
+	now := time.Now().UTC()
+
+	rec, exists := versions[version]
+	if !exists {
+		rec = specDefRecord{
+			CreatedAt: now,
+			UpdatedAt: now,
+			Schema:    schema[:],
+		}
+	} else {
+		rec.UpdatedAt = now
+		rec.Schema = schema
+	}
+
+	versions[version] = rec
+	r.definitions[name] = versions
+
+	specDef := datastore.SpecDefinition{
+		SpecDefinitionHeader: datastore.SpecDefinitionHeader{
+			Name:      name,
+			Version:   version,
+			CreatedAt: rec.CreatedAt,
+			UpdatedAt: rec.UpdatedAt,
+		},
+		Schema: rec.Schema[:],
+	}
+
+	return &specDef, nil
+}
+
+func NewSpecDefinitionRepository() *SpecDefinitionRepository {
+	return &SpecDefinitionRepository{
+		definitions: make(map[string]map[string]specDefRecord),
+	}
+}
+
+var _ datastore.SpecDefinitionRepository = &SpecDefinitionRepository{}

internal/datastore/memory/spec_definition_repository_test.go

@@ -0,0 +1,14 @@
+package memory
+
+import (
+	"testing"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/testsuite"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+func TestMemorySpecDefinitionRepository(t *testing.T) {
+	logger.SetLevel(logger.LevelDebug)
+	repo := NewSpecDefinitionRepository()
+	testsuite.TestSpecDefinitionRepository(t, repo)
+}

internal/datastore/spec.go

@@ -2,25 +2,28 @@ package datastore
 
 import (
 	"time"
-
-	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 )
 
 type SpecID int64
 
 type Spec struct {
-	ID        SpecID         `json:"id"`
-	Name      string         `json:"name"`
-	Data      map[string]any `json:"data"`
-	Revision  int            `json:"revision"`
-	CreatedAt time.Time      `json:"createdAt"`
-	UpdatedAt time.Time      `json:"updatedAt"`
-	TenantID  TenantID       `json:"tenantId"`
-	AgentID   AgentID        `json:"agentId"`
+	ID                SpecID         `json:"id"`
+	DefinitionName    string         `json:"name"`
+	DefinitionVersion string         `json:"version"`
+	Data              map[string]any `json:"data"`
+	Revision          int            `json:"revision"`
+	CreatedAt         time.Time      `json:"createdAt"`
+	UpdatedAt         time.Time      `json:"updatedAt"`
+	TenantID          TenantID       `json:"tenantId"`
+	AgentID           AgentID        `json:"agentId"`
 }
 
-func (s *Spec) SpecName() spec.Name {
-	return spec.Name(s.Name)
+func (s *Spec) SpecDefinitionName() string {
+	return s.DefinitionName
+}
+
+func (s *Spec) SpecDefinitionVersion() string {
+	return s.DefinitionVersion
 }
 
 func (s *Spec) SpecRevision() int {

internal/datastore/spec_definition.go

@@ -0,0 +1,18 @@
+package datastore
+
+import (
+	"time"
+)
+
+type SpecDefinitionHeader struct {
+	Name      string    `json:"name"`
+	Version   string    `json:"version"`
+	CreatedAt time.Time `json:"createdAt"`
+	UpdatedAt time.Time `json:"updatedAt"`
+}
+
+type SpecDefinition struct {
+	SpecDefinitionHeader
+
+	Schema []byte `json:"schema"`
+}

internal/datastore/spec_definition_repository.go

@@ -0,0 +1,46 @@
+package datastore
+
+import (
+	"context"
+)
+
+type SpecDefinitionRepository interface {
+	Upsert(ctx context.Context, name string, version string, schema []byte) (*SpecDefinition, error)
+	Get(ctx context.Context, name string, version string) (*SpecDefinition, error)
+	Delete(ctx context.Context, name string, version string) error
+
+	Query(ctx context.Context, opts ...SpecDefinitionQueryOptionFunc) ([]SpecDefinitionHeader, int, error)
+}
+
+type SpecDefinitionQueryOptionFunc func(*SpecDefinitionQueryOptions)
+
+type SpecDefinitionQueryOptions struct {
+	Limit    *int
+	Offset   *int
+	Names    []string
+	Versions []string
+}
+
+func WithSpecDefinitionQueryLimit(limit int) SpecDefinitionQueryOptionFunc {
+	return func(opts *SpecDefinitionQueryOptions) {
+		opts.Limit = &limit
+	}
+}
+
+func WithSpecDefinitionQueryOffset(offset int) SpecDefinitionQueryOptionFunc {
+	return func(opts *SpecDefinitionQueryOptions) {
+		opts.Offset = &offset
+	}
+}
+
+func WithSpecDefinitionQueryNames(names ...string) SpecDefinitionQueryOptionFunc {
+	return func(opts *SpecDefinitionQueryOptions) {
+		opts.Names = names
+	}
+}
+
+func WithSpecDefinitionQueryVersions(versions ...string) SpecDefinitionQueryOptionFunc {
+	return func(opts *SpecDefinitionQueryOptions) {
+		opts.Versions = versions
+	}
+}

internal/datastore/sqlite/agent_repository.go

@@ -128,7 +128,7 @@ func (r *AgentRepository) Detach(ctx context.Context, agentID datastore.AgentID)
 }
 
 // DeleteSpec implements datastore.AgentRepository.
-func (r *AgentRepository) DeleteSpec(ctx context.Context, agentID datastore.AgentID, name string) error {
+func (r *AgentRepository) DeleteSpec(ctx context.Context, agentID datastore.AgentID, name string, version string) error {
 	err := r.withTxRetry(ctx, func(tx *sql.Tx) error {
 		exists, err := r.agentExists(ctx, tx, agentID)
 		if err != nil {
@@ -139,9 +139,9 @@ func (r *AgentRepository) DeleteSpec(ctx context.Context, agentID datastore.Agen
 			return errors.WithStack(datastore.ErrNotFound)
 		}
 
-		query := `DELETE FROM specs WHERE agent_id = $1 AND name = $2`
+		query := `DELETE FROM specs WHERE agent_id = $1 AND name = $2 AND version = $3`
 
-		if _, err = tx.ExecContext(ctx, query, agentID, name); err != nil {
+		if _, err = tx.ExecContext(ctx, query, agentID, name, version); err != nil {
 			return errors.WithStack(err)
 		}
 
@@ -169,7 +169,7 @@ func (r *AgentRepository) GetSpecs(ctx context.Context, agentID datastore.AgentI
 		}
 
 		query := `
-		SELECT id, name, revision, data, created_at, updated_at
+		SELECT id, name, version, revision, data, created_at, updated_at, agent_id, tenant_id
 		FROM specs
 		WHERE agent_id = $1
 		`
@@ -191,10 +191,14 @@ func (r *AgentRepository) GetSpecs(ctx context.Context, agentID datastore.AgentI
 
 			data := JSONMap{}
 
-			if err := rows.Scan(&spec.ID, &spec.Name, &spec.Revision, &data, &spec.CreatedAt, &spec.UpdatedAt); err != nil {
+			var tenantID sql.NullString
+			if err := rows.Scan(&spec.ID, &spec.DefinitionName, &spec.DefinitionVersion, &spec.Revision, &data, &spec.CreatedAt, &spec.UpdatedAt, &spec.AgentID, &tenantID); err != nil {
 				return errors.WithStack(err)
 			}
 
+			if tenantID.Valid {
+				spec.TenantID = datastore.TenantID(tenantID.String)
+			}
 			spec.Data = data
 
 			specs = append(specs, spec)
@@ -214,7 +218,7 @@ func (r *AgentRepository) GetSpecs(ctx context.Context, agentID datastore.AgentI
 }
 
 // UpdateSpec implements datastore.AgentRepository.
-func (r *AgentRepository) UpdateSpec(ctx context.Context, agentID datastore.AgentID, name string, revision int, data map[string]any) (*datastore.Spec, error) {
+func (r *AgentRepository) UpdateSpec(ctx context.Context, agentID datastore.AgentID, name string, version string, revision int, data map[string]any) (*datastore.Spec, error) {
 	spec := &datastore.Spec{}
 
 	err := r.withTxRetry(ctx, func(tx *sql.Tx) error {
@@ -230,23 +234,24 @@ func (r *AgentRepository) UpdateSpec(ctx context.Context, agentID datastore.Agen
 		now := time.Now().UTC()
 
 		query := `
-		INSERT INTO specs (agent_id, name, revision, data, created_at, updated_at, tenant_id) 
-		VALUES($1, $2, $3, $4, $5, $5, ( SELECT tenant_id FROM agents WHERE id = $1 ))
-		ON CONFLICT (agent_id, name) DO UPDATE SET
-			data = $4, updated_at = $5, revision = specs.revision + 1
-			WHERE revision = $3 
-		RETURNING "id", "name", "revision", "data", "created_at", "updated_at"
+		INSERT INTO specs (agent_id, name, version, revision, data, created_at, updated_at, tenant_id) 
+		VALUES($1, $2, $3, $4, $5, $6, $6, ( SELECT tenant_id FROM agents WHERE id = $1 ))
+		ON CONFLICT (agent_id, name, version) DO UPDATE SET
+			data = $5, updated_at = $6, revision = specs.revision + 1, tenant_id = ( SELECT tenant_id FROM agents WHERE id = $1 )
+			WHERE revision = $4 
+		RETURNING "id", "name", "version", "revision", "data", "created_at", "updated_at", "tenant_id", "agent_id"
 		`
 
-		args := []any{agentID, name, revision, JSONMap(data), now}
+		args := []any{agentID, name, version, revision, JSONMap(data), now}
 
 		logger.Debug(ctx, "executing query", logger.F("query", query), logger.F("args", args))
 
 		row := tx.QueryRowContext(ctx, query, args...)
 
 		data := JSONMap{}
+		var tenantID sql.NullString
 
-		err = row.Scan(&spec.ID, &spec.Name, &spec.Revision, &data, &spec.CreatedAt, &spec.UpdatedAt)
+		err = row.Scan(&spec.ID, &spec.DefinitionName, &spec.DefinitionVersion, &spec.Revision, &data, &spec.CreatedAt, &spec.UpdatedAt, &tenantID, &spec.AgentID)
 		if err != nil {
 			if errors.Is(err, sql.ErrNoRows) {
 				return errors.WithStack(datastore.ErrUnexpectedRevision)
@@ -255,6 +260,10 @@ func (r *AgentRepository) UpdateSpec(ctx context.Context, agentID datastore.Agen
 			return errors.WithStack(err)
 		}
 
+		if tenantID.Valid {
+			spec.TenantID = datastore.TenantID(tenantID.String)
+		}
+
 		spec.Data = data
 
 		return nil
@@ -301,6 +310,10 @@ func (r *AgentRepository) Query(ctx context.Context, opts ...datastore.AgentQuer
 		}
 
 		if options.TenantIDs != nil && len(options.TenantIDs) > 0 {
+			if filters != "" {
+				filters += " AND "
+			}
+
 			filter, newArgs, newParamIndex := inFilter("tenant_id", paramIndex, options.TenantIDs)
 			filters += filter
 			paramIndex = newParamIndex

internal/datastore/sqlite/json.go

@@ -7,6 +7,42 @@ import (
 	"github.com/pkg/errors"
 )
 
+type JSON struct {
+	value any
+}
+
+func (j JSON) Scan(value interface{}) error {
+	if value == nil {
+		return nil
+	}
+
+	var data []byte
+
+	switch typ := value.(type) {
+	case []byte:
+		data = typ
+	case string:
+		data = []byte(typ)
+	default:
+		return errors.Errorf("unexpected type '%T'", value)
+	}
+
+	if err := json.Unmarshal(data, &j.value); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+func (j JSON) Value() (driver.Value, error) {
+	data, err := json.Marshal(j.value)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return data, nil
+}
+
 type JSONMap map[string]any
 
 func (j *JSONMap) Scan(value interface{}) error {

internal/datastore/sqlite/spec_definition_repository.go

@@ -0,0 +1,219 @@
+package sqlite
+
+import (
+	"context"
+	"database/sql"
+	"time"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+type SpecDefinitionRepository struct {
+	repository
+}
+
+// Delete implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Delete(ctx context.Context, name string, version string) error {
+	err := r.withTxRetry(ctx, func(tx *sql.Tx) error {
+		if exists, err := r.specDefinitionExists(ctx, tx, name, version); !exists {
+			return errors.WithStack(err)
+		}
+
+		query := `DELETE FROM spec_definitions WHERE name = $1 AND version = $2`
+		_, err := tx.ExecContext(ctx, query, name, version)
+		if err != nil {
+			return errors.WithStack(err)
+		}
+
+		return nil
+	})
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+// Get implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Get(ctx context.Context, name string, version string) (*datastore.SpecDefinition, error) {
+	var specDef datastore.SpecDefinition
+
+	err := r.withTxRetry(ctx, func(tx *sql.Tx) error {
+		query := `
+		SELECT "name", "version", "schema", "created_at", "updated_at"
+		FROM spec_definitions
+		WHERE name = $1 AND version = $2
+		`
+
+		row := tx.QueryRowContext(ctx, query, name, version)
+
+		if err := row.Scan(&specDef.Name, &specDef.Version, &specDef.Schema, &specDef.CreatedAt, &specDef.UpdatedAt); err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				return errors.WithStack(datastore.ErrNotFound)
+			}
+
+			return errors.WithStack(err)
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return &specDef, nil
+}
+
+// Query implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Query(ctx context.Context, opts ...datastore.SpecDefinitionQueryOptionFunc) ([]datastore.SpecDefinitionHeader, int, error) {
+	options := &datastore.SpecDefinitionQueryOptions{}
+	for _, fn := range opts {
+		fn(options)
+	}
+
+	specDefs := make([]datastore.SpecDefinitionHeader, 0)
+	count := 0
+
+	err := r.withTxRetry(ctx, func(tx *sql.Tx) error {
+		query := `SELECT name, version, created_at, updated_at FROM spec_definitions`
+
+		limit := 10
+		if options.Limit != nil {
+			limit = *options.Limit
+		}
+
+		offset := 0
+		if options.Offset != nil {
+			offset = *options.Offset
+		}
+
+		filters := ""
+		paramIndex := 3
+		args := []any{offset, limit}
+
+		if options.Names != nil && len(options.Names) > 0 {
+			filter, newArgs, newParamIndex := inFilter("name", paramIndex, options.Names)
+			filters += filter
+			paramIndex = newParamIndex
+			args = append(args, newArgs...)
+		}
+
+		if options.Versions != nil && len(options.Versions) > 0 {
+			if filters != "" {
+				filters += " AND "
+			}
+
+			filter, newArgs, _ := inFilter("version", paramIndex, options.Versions)
+			filters += filter
+			args = append(args, newArgs...)
+		}
+
+		if filters != "" {
+			filters = ` WHERE ` + filters
+		}
+
+		query += filters + ` LIMIT $2 OFFSET $1`
+
+		logger.Debug(ctx, "executing query", logger.F("query", query), logger.F("args", args))
+
+		rows, err := tx.QueryContext(ctx, query, args...)
+		if err != nil {
+			return errors.WithStack(err)
+		}
+
+		defer func() {
+			if err := rows.Close(); err != nil {
+				err = errors.WithStack(err)
+				logger.Error(ctx, "could not close rows", logger.CapturedE(err))
+			}
+		}()
+
+		for rows.Next() {
+			sdh := datastore.SpecDefinitionHeader{}
+
+			if err := rows.Scan(&sdh.Name, &sdh.Version, &sdh.CreatedAt, &sdh.UpdatedAt); err != nil {
+				return errors.WithStack(err)
+			}
+
+			specDefs = append(specDefs, sdh)
+		}
+
+		if err := rows.Err(); err != nil {
+			return errors.WithStack(err)
+		}
+
+		row := tx.QueryRowContext(ctx, `SELECT count(*) FROM spec_definitions `+filters, args...)
+		if err := row.Scan(&count); err != nil {
+			return errors.WithStack(err)
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, 0, errors.WithStack(err)
+	}
+
+	return specDefs, count, nil
+}
+
+// Upsert implements datastore.SpecDefinitionRepository.
+func (r *SpecDefinitionRepository) Upsert(ctx context.Context, name string, version string, schema []byte) (*datastore.SpecDefinition, error) {
+	var specDef datastore.SpecDefinition
+
+	err := r.withTxRetry(ctx, func(tx *sql.Tx) error {
+		now := time.Now().UTC()
+
+		query := `
+		INSERT INTO spec_definitions (name, version, schema, created_at, updated_at) 
+		VALUES($1, $2, $3, $4, $4)
+		ON CONFLICT(name, version) DO UPDATE SET schema = $3, updated_at = $4
+		RETURNING "name", "version", "schema", "created_at", "updated_at"
+		`
+
+		row := tx.QueryRowContext(
+			ctx, query,
+			name, version, schema, now, now,
+		)
+
+		if err := row.Scan(&specDef.Name, &specDef.Version, &specDef.Schema, &specDef.CreatedAt, &specDef.UpdatedAt); err != nil {
+			return errors.WithStack(err)
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return &specDef, nil
+}
+
+func (r *SpecDefinitionRepository) specDefinitionExists(ctx context.Context, tx *sql.Tx, name string, version string) (bool, error) {
+	row := tx.QueryRowContext(ctx, `SELECT count(id) FROM spec_definitions WHERE name = $1 AND version = $2`, name, version)
+
+	var count int
+
+	if err := row.Scan(&count); err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return false, errors.WithStack(datastore.ErrNotFound)
+		}
+
+		return false, errors.WithStack(err)
+	}
+
+	if count == 0 {
+		return false, errors.WithStack(datastore.ErrNotFound)
+	}
+
+	return true, nil
+}
+
+func NewSpecDefinitionRepository(db *sql.DB, sqliteBusyRetryMaxAttempts int) *SpecDefinitionRepository {
+	return &SpecDefinitionRepository{
+		repository: repository{db, sqliteBusyRetryMaxAttempts},
+	}
+}
+
+var _ datastore.SpecDefinitionRepository = &SpecDefinitionRepository{}

internal/datastore/sqlite/spec_definition_repository_test.go

@@ -0,0 +1,46 @@
+package sqlite
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+	"testing"
+	"time"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/testsuite"
+	"forge.cadoles.com/Cadoles/emissary/internal/migrate"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/logger"
+
+	_ "modernc.org/sqlite"
+)
+
+func TestSQLiteSpecDefinitionRepository(t *testing.T) {
+	logger.SetLevel(logger.LevelDebug)
+
+	file := "testdata/spec_definition_repository_test.sqlite"
+
+	if err := os.Remove(file); err != nil && !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	dsn := fmt.Sprintf("%s?_pragma=foreign_keys(1)&_pragma=busy_timeout=%d", file, (60 * time.Second).Milliseconds())
+
+	migr, err := migrate.New("../../../migrations", "sqlite", "sqlite://"+dsn)
+	if err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	if err := migr.Up(); err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	db, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	repo := NewSpecDefinitionRepository(db, 5)
+
+	testsuite.TestSpecDefinitionRepository(t, repo)
+}

internal/datastore/sqlite/tenant_repository_test.go

@@ -15,7 +15,7 @@ import (
 	_ "modernc.org/sqlite"
 )
 
-func TestSQLiteTeantRepository(t *testing.T) {
+func TestSQLiteTenantRepository(t *testing.T) {
 	logger.SetLevel(logger.LevelDebug)
 
 	file := "testdata/tenant_repository_test.sqlite"

internal/datastore/testsuite/agent_repository_cases.go

@@ -50,7 +50,7 @@ var agentRepositoryTestCases = []agentRepositoryTestCase{
 			var unexistantAgentID datastore.AgentID = 9999
 			var specData map[string]any
 
-			agent, err := repo.UpdateSpec(ctx, unexistantAgentID, string(spec.Name), 0, specData)
+			agent, err := repo.UpdateSpec(ctx, unexistantAgentID, spec.Name, spec.Version, 0, specData)
 			if err == nil {
 				return errors.New("error should not be nil")
 			}
@@ -71,7 +71,7 @@ var agentRepositoryTestCases = []agentRepositoryTestCase{
 		Run: func(ctx context.Context, repo datastore.AgentRepository) error {
 			var unexistantAgentID datastore.AgentID = 9999
 
-			err := repo.DeleteSpec(ctx, unexistantAgentID, string(spec.Name))
+			err := repo.DeleteSpec(ctx, unexistantAgentID, spec.Name, spec.Version)
 			if err == nil {
 				return errors.New("error should not be nil")
 			}

internal/datastore/testsuite/spec_definition_repository.go

@@ -0,0 +1,14 @@
+package testsuite
+
+import (
+	"testing"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+)
+
+func TestSpecDefinitionRepository(t *testing.T, repo datastore.SpecDefinitionRepository) {
+	t.Run("Cases", func(t *testing.T) {
+		t.Parallel()
+		runSpecDefinitionRepositoryTests(t, repo)
+	})
+}

internal/datastore/testsuite/spec_definition_repository_cases.go

@@ -0,0 +1,76 @@
+package testsuite
+
+import (
+	"context"
+	"reflect"
+	"testing"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+	"github.com/pkg/errors"
+)
+
+type specDefinitionRepositoryTestCase struct {
+	Name string
+	Skip bool
+	Run  func(ctx context.Context, repo datastore.SpecDefinitionRepository) error
+}
+
+var specDefinitionRepositoryTestCases = []specDefinitionRepositoryTestCase{
+	{
+		Name: "Create a spec definition",
+		Run: func(ctx context.Context, repo datastore.SpecDefinitionRepository) error {
+			schema := []byte("{}")
+			name := "net.example.foo"
+			version := "0.0.0"
+
+			specDef, err := repo.Upsert(ctx, name, version, schema)
+			if err != nil {
+				return errors.WithStack(err)
+			}
+
+			if specDef.CreatedAt.IsZero() {
+				return errors.Errorf("specDef.CreatedAt should not be zero time")
+			}
+
+			if specDef.UpdatedAt.IsZero() {
+				return errors.Errorf("specDef.UpdatedAt should not be zero time")
+			}
+
+			if e, g := name, specDef.Name; e != g {
+				return errors.Errorf("specDef.Name: expected '%v', got '%v'", e, g)
+			}
+
+			if e, g := version, specDef.Version; e != g {
+				return errors.Errorf("specDef.Name: expected '%v', got '%v'", e, g)
+			}
+
+			if e, g := schema, specDef.Schema; !reflect.DeepEqual(e, g) {
+				return errors.Errorf("specDef.Schema: expected '%v', got '%v'", e, g)
+			}
+
+			return nil
+		},
+	},
+}
+
+func runSpecDefinitionRepositoryTests(t *testing.T, repo datastore.SpecDefinitionRepository) {
+	for _, tc := range specDefinitionRepositoryTestCases {
+		func(tc specDefinitionRepositoryTestCase) {
+			t.Run(tc.Name, func(t *testing.T) {
+				t.Parallel()
+
+				if tc.Skip {
+					t.SkipNow()
+
+					return
+				}
+
+				ctx := context.Background()
+
+				if err := tc.Run(ctx, repo); err != nil {
+					t.Errorf("%+v", errors.WithStack(err))
+				}
+			})
+		}(tc)
+	}
+}

internal/server/api/delete_agent_spec.go

@@ -9,42 +9,12 @@ import (
 	"gitlab.com/wpetit/goweb/logger"
 )
 
-func (m *Mount) getAgentSpecs(w http.ResponseWriter, r *http.Request) {
-	agentID, ok := getAgentID(w, r)
-	if !ok {
-		return
-	}
-
-	ctx := r.Context()
-
-	specs, err := m.agentRepo.GetSpecs(ctx, agentID)
-	if err != nil {
-		if errors.Is(err, datastore.ErrNotFound) {
-			api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)
-
-			return
-		}
-
-		err = errors.WithStack(err)
-		logger.Error(ctx, "could not list specs", logger.CapturedE(err))
-
-		api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
-
-		return
-	}
-
-	api.DataResponse(w, http.StatusOK, struct {
-		Specs []*datastore.Spec `json:"specs"`
-	}{
-		Specs: specs,
-	})
-}
-
 type deleteSpecRequest struct {
-	Name string `json:"name"`
+	Name    string `json:"name"  validate:"required"`
+	Version string `json:"version" validate:"required"`
 }
 
-func (m *Mount) deleteSpec(w http.ResponseWriter, r *http.Request) {
+func (m *Mount) deleteAgentSpec(w http.ResponseWriter, r *http.Request) {
 	agentID, ok := getAgentID(w, r)
 	if !ok {
 		return
@@ -61,6 +31,7 @@ func (m *Mount) deleteSpec(w http.ResponseWriter, r *http.Request) {
 		ctx,
 		agentID,
 		deleteSpecReq.Name,
+		deleteSpecReq.Version,
 	)
 	if err != nil {
 		if errors.Is(err, datastore.ErrNotFound) {
@@ -78,8 +49,10 @@ func (m *Mount) deleteSpec(w http.ResponseWriter, r *http.Request) {
 	}
 
 	api.DataResponse(w, http.StatusOK, struct {
-		Name string `json:"name"`
+		Name    string `json:"name"`
+		Version string `json:"version"`
 	}{
-		Name: deleteSpecReq.Name,
+		Name:    deleteSpecReq.Name,
+		Version: deleteSpecReq.Version,
 	})
 }

internal/server/api/get_agent_specs.go

@@ -0,0 +1,41 @@
+package api
+
+import (
+	"net/http"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/api"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+func (m *Mount) getAgentSpecs(w http.ResponseWriter, r *http.Request) {
+	agentID, ok := getAgentID(w, r)
+	if !ok {
+		return
+	}
+
+	ctx := r.Context()
+
+	specs, err := m.agentRepo.GetSpecs(ctx, agentID)
+	if err != nil {
+		if errors.Is(err, datastore.ErrNotFound) {
+			api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)
+
+			return
+		}
+
+		err = errors.WithStack(err)
+		logger.Error(ctx, "could not list specs", logger.CapturedE(err))
+
+		api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
+
+		return
+	}
+
+	api.DataResponse(w, http.StatusOK, struct {
+		Specs []*datastore.Spec `json:"specs"`
+	}{
+		Specs: specs,
+	})
+}

internal/server/api/get_spec_definition.go

@@ -0,0 +1,44 @@
+package api
+
+import (
+	"net/http"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/api"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+func (m *Mount) getSpecDefinition(w http.ResponseWriter, r *http.Request) {
+	specDefName, specDefVersion, ok := getSpecDefinitionNameAndVersion(w, r)
+	if !ok {
+		return
+	}
+
+	ctx := r.Context()
+
+	specDef, err := m.specDefRepo.Get(
+		ctx,
+		specDefName,
+		specDefVersion,
+	)
+	if err != nil {
+		if errors.Is(err, datastore.ErrNotFound) {
+			api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)
+
+			return
+		}
+
+		err = errors.WithStack(err)
+		logger.Error(ctx, "could not get agent", logger.CapturedE(err))
+		api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
+
+		return
+	}
+
+	api.DataResponse(w, http.StatusOK, struct {
+		SpecDefinition *datastore.SpecDefinition `json:"specDefinition"`
+	}{
+		SpecDefinition: specDef,
+	})
+}

internal/server/api/helper.go

@@ -35,20 +35,11 @@ func getAgentID(w http.ResponseWriter, r *http.Request) (datastore.AgentID, bool
 	return datastore.AgentID(agentID), true
 }
 
-func getSpecID(w http.ResponseWriter, r *http.Request) (datastore.SpecID, bool) {
-	rawSpecID := chi.URLParam(r, "specID")
+func getSpecDefinitionNameAndVersion(w http.ResponseWriter, r *http.Request) (string, string, bool) {
+	specDefName := chi.URLParam(r, "specDefName")
+	specDefVersion := chi.URLParam(r, "specDefVersion")
 
-	specID, err := strconv.ParseInt(rawSpecID, 10, 64)
-	if err != nil {
-		err = errors.WithStack(err)
-		logger.Error(r.Context(), "could not parse spec id", logger.CapturedE(err))
-
-		api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)
-
-		return 0, false
-	}
-
-	return datastore.SpecID(specID), true
+	return specDefName, specDefVersion, true
 }
 
 func getTenantID(w http.ResponseWriter, r *http.Request) (datastore.TenantID, bool) {

internal/server/api/mount.go

@@ -12,6 +12,7 @@ import (
 type Mount struct {
 	agentRepo      datastore.AgentRepository
 	tenantRepo     datastore.TenantRepository
+	specDefRepo    datastore.SpecDefinitionRepository
 	authenticators []auth.Authenticator
 }
 
@@ -35,8 +36,8 @@ func (m *Mount) Mount(r chi.Router) {
 			r.With(assertUserWithWriteAccess).Delete("/{agentID}", m.deleteAgent)
 
 			r.With(assertAgentOrUserWithReadAccess).Get("/{agentID}/specs", m.getAgentSpecs)
-			r.With(assertUserWithWriteAccess).Post("/{agentID}/specs", m.updateSpec)
-			r.With(assertUserWithWriteAccess).Delete("/{agentID}/specs", m.deleteSpec)
+			r.With(assertUserWithWriteAccess).Post("/{agentID}/specs", m.updateAgentSpec)
+			r.With(assertUserWithWriteAccess).Delete("/{agentID}/specs", m.deleteAgentSpec)
 		})
 
 		r.Route("/tenants", func(r chi.Router) {
@@ -46,6 +47,11 @@ func (m *Mount) Mount(r chi.Router) {
 			r.With(assertAdminOrTenantWriteAccess).Put("/{tenantID}", m.updateTenant)
 			r.With(assertAdminAccess).Delete("/{tenantID}", m.deleteTenant)
 		})
+
+		r.Route("/specs", func(r chi.Router) {
+			r.With(assertQueryAccess).Get("/", m.querySpecDefinitions)
+			r.With(assertQueryAccess).Get("/{specDefName}/{specDefVersion}", m.getSpecDefinition)
+		})
 	})
 }
 
@@ -53,6 +59,6 @@ func (m *Mount) notFound(w http.ResponseWriter, r *http.Request) {
 	api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)
 }
 
-func NewMount(agentRepo datastore.AgentRepository, tenantRepo datastore.TenantRepository, authenticators ...auth.Authenticator) *Mount {
-	return &Mount{agentRepo, tenantRepo, authenticators}
+func NewMount(agentRepo datastore.AgentRepository, tenantRepo datastore.TenantRepository, specDefRepo datastore.SpecDefinitionRepository, authenticators ...auth.Authenticator) *Mount {
+	return &Mount{agentRepo, tenantRepo, specDefRepo, authenticators}
 }

internal/server/api/query_spec_definitions.go

@@ -0,0 +1,67 @@
+package api
+
+import (
+	"net/http"
+
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/api"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+func (m *Mount) querySpecDefinitions(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	limit, ok := getIntQueryParam(w, r, "limit", 10)
+	if !ok {
+		return
+	}
+
+	offset, ok := getIntQueryParam(w, r, "offset", 0)
+	if !ok {
+		return
+	}
+
+	options := []datastore.SpecDefinitionQueryOptionFunc{
+		datastore.WithSpecDefinitionQueryLimit(int(limit)),
+		datastore.WithSpecDefinitionQueryOffset(int(offset)),
+	}
+
+	names, ok := getStringSliceValues(w, r, "names", nil)
+	if !ok {
+		return
+	}
+
+	if len(names) > 0 {
+		options = append(options, datastore.WithSpecDefinitionQueryNames(names...))
+	}
+
+	versions, ok := getStringSliceValues(w, r, "versions", nil)
+	if !ok {
+		return
+	}
+
+	if len(names) > 0 {
+		options = append(options, datastore.WithSpecDefinitionQueryVersions(versions...))
+	}
+
+	specDefinitions, total, err := m.specDefRepo.Query(
+		ctx,
+		options...,
+	)
+	if err != nil {
+		err = errors.WithStack(err)
+		logger.Error(ctx, "could not list spec definitions", logger.CapturedE(err))
+		api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)
+
+		return
+	}
+
+	api.DataResponse(w, http.StatusOK, struct {
+		SpecDefinitions []datastore.SpecDefinitionHeader `json:"specDefinitions"`
+		Total           int                              `json:"total"`
+	}{
+		SpecDefinitions: specDefinitions,
+		Total:           total,
+	})
+}

internal/server/api/update_agent_spec.go

@@ -14,11 +14,11 @@ const (
 	ErrCodeUnexpectedRevision api.ErrorCode = "unexpected-revision"
 )
 
-type updateSpecRequest struct {
+type updateAgentSpecRequest struct {
 	spec.RawSpec
 }
 
-func (m *Mount) updateSpec(w http.ResponseWriter, r *http.Request) {
+func (m *Mount) updateAgentSpec(w http.ResponseWriter, r *http.Request) {
 	agentID, ok := getAgentID(w, r)
 	if !ok {
 		return
@@ -26,12 +26,18 @@ func (m *Mount) updateSpec(w http.ResponseWriter, r *http.Request) {
 
 	ctx := r.Context()
 
-	updateSpecReq := &updateSpecRequest{}
+	updateSpecReq := &updateAgentSpecRequest{}
 	if ok := api.Bind(w, r, updateSpecReq); !ok {
 		return
 	}
 
-	if err := spec.Validate(ctx, updateSpecReq); err != nil {
+	if updateSpecReq.DefinitionVersion == "" {
+		updateSpecReq.DefinitionVersion = spec.DefaultVersion
+	}
+
+	validator := spec.NewValidator(m.specDefRepo)
+
+	if err := validator.Validate(ctx, updateSpecReq); err != nil {
 		data := struct {
 			Message string `json:"message"`
 		}{}
@@ -53,7 +59,8 @@ func (m *Mount) updateSpec(w http.ResponseWriter, r *http.Request) {
 	spec, err := m.agentRepo.UpdateSpec(
 		ctx,
 		datastore.AgentID(agentID),
-		string(updateSpecReq.SpecName()),
+		updateSpecReq.SpecDefinitionName(),
+		updateSpecReq.SpecDefinitionVersion(),
 		updateSpecReq.SpecRevision(),
 		updateSpecReq.SpecData(),
 	)

internal/server/init.go

@@ -4,7 +4,9 @@ import (
 	"context"
 
 	"forge.cadoles.com/Cadoles/emissary/internal/setup"
+	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/logger"
 )
 
 func (s *Server) initRepositories(ctx context.Context) error {
@@ -18,8 +20,35 @@ func (s *Server) initRepositories(ctx context.Context) error {
 		return errors.WithStack(err)
 	}
 
+	specDefRepo, err := setup.NewSpecDefinitionRepository(ctx, s.conf.Database)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
 	s.agentRepo = agentRepo
 	s.tenantRepo = tenantRepo
+	s.specDefRepo = specDefRepo
+
+	return nil
+}
+
+func (s *Server) initSpecDefinitions(ctx context.Context) error {
+	err := spec.Walk(func(name, version string, schema []byte) error {
+		logger.Debug(
+			ctx, "updating spec definition",
+			logger.F("name", name),
+			logger.F("version", version),
+		)
+		if _, err := s.specDefRepo.Upsert(ctx, name, version, schema); err != nil {
+			return errors.WithStack(err)
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return errors.WithStack(err)
+	}
 
 	return nil
 }

internal/server/server.go

@@ -28,9 +28,10 @@ import (
 )
 
 type Server struct {
-	conf       config.ServerConfig
-	agentRepo  datastore.AgentRepository
-	tenantRepo datastore.TenantRepository
+	conf        config.ServerConfig
+	agentRepo   datastore.AgentRepository
+	tenantRepo  datastore.TenantRepository
+	specDefRepo datastore.SpecDefinitionRepository
 }
 
 func (s *Server) Start(ctx context.Context) (<-chan net.Addr, <-chan error) {
@@ -57,6 +58,12 @@ func (s *Server) run(parentCtx context.Context, addrs chan net.Addr, errs chan e
 		return
 	}
 
+	if err := s.initSpecDefinitions(ctx); err != nil {
+		errs <- errors.WithStack(err)
+
+		return
+	}
+
 	listener, err := net.Listen("tcp", fmt.Sprintf("%s:%d", s.conf.HTTP.Host, s.conf.HTTP.Port))
 	if err != nil {
 		errs <- errors.WithStack(err)
@@ -105,6 +112,7 @@ func (s *Server) run(parentCtx context.Context, addrs chan net.Addr, errs chan e
 		apiMount := api.NewMount(
 			s.agentRepo,
 			s.tenantRepo,
+			s.specDefRepo,
 			userAuth,
 			agent.NewAuthenticator(s.agentRepo, agent.DefaultAcceptableSkew),
 		)

internal/setup/repository.go

@@ -104,3 +104,40 @@ func NewTenantRepository(ctx context.Context, conf config.DatabaseConfig) (datas
 
 	return tenantRepository, nil
 }
+
+func NewSpecDefinitionRepository(ctx context.Context, conf config.DatabaseConfig) (datastore.SpecDefinitionRepository, error) {
+	driver := string(conf.Driver)
+	dsn := string(conf.DSN)
+
+	var specDefRepository datastore.SpecDefinitionRepository
+
+	logger.Debug(ctx, "initializing spec definition repository", logger.F("driver", driver), logger.F("dsn", dsn))
+
+	switch driver {
+	case config.DatabaseDriverPostgres:
+		// TODO
+		// pool, err := openPostgresPool(ctx, dsn)
+		// if err != nil {
+		// 	return nil, errors.WithStack(err)
+		// }
+
+		// entryRepository = postgres.NewEntryRepository(pool)
+	case config.DatabaseDriverSQLite:
+		url, err := url.Parse(dsn)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		db, err := sql.Open(driver, url.Host+url.Path)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		specDefRepository = sqlite.NewSpecDefinitionRepository(db, 5)
+
+	default:
+		return nil, errors.Errorf("unsupported database driver '%s'", driver)
+	}
+
+	return specDefRepository, nil
+}

internal/spec/compare.go

@@ -6,7 +6,11 @@ import (
 )
 
 func Equals(a Spec, b Spec) (bool, error) {
-	if a.SpecName() != b.SpecName() {
+	if a.SpecDefinitionName() != b.SpecDefinitionName() {
+		return false, nil
+	}
+
+	if a.SpecDefinitionVersion() != b.SpecDefinitionVersion() {
 		return false, nil
 	}
 

internal/spec/name.go

@@ -1,3 +0,0 @@
-package spec
-
-type Name string

internal/spec/proxy/init.go

@@ -11,7 +11,7 @@ import (
 var schema []byte
 
 func init() {
-	if err := spec.Register(NameProxy, schema); err != nil {
+	if err := spec.Register(string(Name), Version, schema); err != nil {
 		panic(errors.WithStack(err))
 	}
 }

internal/spec/proxy/schema.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
     "$id": "https://proxy.emissary.cadoles.com/spec.json",
     "title": "ProxySpec",
     "description": "Emissary 'Proxy' specification",
@@ -26,16 +26,24 @@
                                         "type": "string"
                                     }
                                 },
-                                "required": ["hostPattern", "target"]
+                                "required": [
+                                    "hostPattern",
+                                    "target"
+                                ]
                             }
                         }
                     },
-                    "required": ["address", "mappings"],
+                    "required": [
+                        "address",
+                        "mappings"
+                    ],
                     "additionalProperties": false
                 }
             }
         }
     },
-    "required": ["proxies"],
+    "required": [
+        "proxies"
+    ],
     "additionalProperties": false
 }

internal/spec/proxy/spec.go

@@ -2,7 +2,10 @@ package proxy
 
 import "forge.cadoles.com/Cadoles/emissary/internal/spec"
 
-const NameProxy spec.Name = "proxy.emissary.cadoles.com"
+const (
+	Name    string = "proxy.emissary.cadoles.com"
+	Version        = "0.0.0"
+)
 
 type ID string
 
@@ -21,8 +24,12 @@ type ProxyMapping struct {
 	Target      string `json:"target"`
 }
 
-func (s *Spec) SpecName() spec.Name {
-	return NameProxy
+func (s *Spec) SpecDefinitionName() string {
+	return Name
+}
+
+func (s *Spec) SpecDefinitionVersion() string {
+	return Version
 }
 
 func (s *Spec) SpecRevision() int {

internal/spec/proxy/validator_test.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"testing"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/memory"
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
@@ -37,11 +38,15 @@ var validatorTestCases = []validatorTestCase{
 func TestValidator(t *testing.T) {
 	t.Parallel()
 
-	validator := spec.NewValidator()
-	if err := validator.Register(NameProxy, schema); err != nil {
+	ctx := context.Background()
+
+	repo := memory.NewSpecDefinitionRepository()
+	if _, err := repo.Upsert(ctx, Name, Version, schema); err != nil {
 		t.Fatalf("+%v", errors.WithStack(err))
 	}
 
+	validator := spec.NewValidator(repo)
+
 	for _, tc := range validatorTestCases {
 		func(tc validatorTestCase) {
 			t.Run(tc.Name, func(t *testing.T) {

internal/spec/registry.go

@@ -0,0 +1,66 @@
+package spec
+
+import (
+	"encoding/json"
+
+	"github.com/pkg/errors"
+	"github.com/qri-io/jsonschema"
+)
+
+type Registry struct {
+	definitions map[string]map[string][]byte
+}
+
+func (r *Registry) Register(name string, version string, schema []byte) error {
+	// Assert that provided schema is valid
+	if err := json.Unmarshal(schema, &jsonschema.Schema{}); err != nil {
+		return errors.WithStack(err)
+	}
+
+	specDefinitions, exists := r.definitions[name]
+	if !exists {
+		specDefinitions = make(map[string][]byte)
+	}
+
+	specDefinitions[version] = schema
+
+	r.definitions[name] = specDefinitions
+
+	return nil
+}
+
+func (r *Registry) Walk(fn func(name string, version string, schema []byte) error) error {
+	for name, specDefinitions := range r.definitions {
+		for version, schema := range specDefinitions {
+			if err := fn(name, version, schema); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+	}
+
+	return nil
+}
+
+func NewRegistry() *Registry {
+	return &Registry{
+		definitions: make(map[string]map[string][]byte),
+	}
+}
+
+var defaultRegistry = NewRegistry()
+
+func Register(name string, version string, schema []byte) error {
+	if err := defaultRegistry.Register(name, version, schema); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+func Walk(fn func(name string, version string, schema []byte) error) error {
+	if err := defaultRegistry.Walk(fn); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}

internal/spec/spec.go

@@ -1,19 +1,27 @@
 package spec
 
+const DefaultVersion = "0.0.0"
+
 type Spec interface {
-	SpecName() Name
+	SpecDefinitionName() string
+	SpecDefinitionVersion() string
 	SpecRevision() int
 	SpecData() map[string]any
 }
 
 type RawSpec struct {
-	Name     Name           `json:"name"`
-	Revision int            `json:"revision"`
-	Data     map[string]any `json:"data"`
+	DefinitionName    string         `json:"name"`
+	DefinitionVersion string         `json:"version"`
+	Revision          int            `json:"revision"`
+	Data              map[string]any `json:"data"`
 }
 
-func (s *RawSpec) SpecName() Name {
-	return s.Name
+func (s *RawSpec) SpecDefinitionName() string {
+	return s.DefinitionName
+}
+
+func (s *RawSpec) SpecDefinitionVersion() string {
+	return s.DefinitionVersion
 }
 
 func (s *RawSpec) SpecRevision() int {

internal/spec/uci/init.go

@@ -11,7 +11,7 @@ import (
 var schema []byte
 
 func init() {
-	if err := spec.Register(NameUCI, schema); err != nil {
+	if err := spec.Register(string(Name), Version, schema); err != nil {
 		panic(errors.WithStack(err))
 	}
 }

internal/spec/uci/schema.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
     "$id": "https://uci.emissary.cadoles.com/spec.json",
     "title": "UCISpec",
     "description": "Emissary 'UCI' specification",
@@ -15,7 +15,9 @@
                     }
                 }
             },
-            "required": ["packages"],
+            "required": [
+                "packages"
+            ],
             "additionalProperties": false
         },
         "postImportCommands": {
@@ -33,12 +35,18 @@
                         }
                     }
                 },
-                "required": ["command", "args"],
+                "required": [
+                    "command",
+                    "args"
+                ],
                 "additionalProperties": false
             }
         }
     },
-    "required": ["config", "postImportCommands"],
+    "required": [
+        "config",
+        "postImportCommands"
+    ],
     "additionalProperties": false,
     "$defs": {
         "package": {
@@ -54,7 +62,10 @@
                     }
                 }
             },
-            "required": ["name", "configs"],
+            "required": [
+                "name",
+                "configs"
+            ],
             "additionalProperties": false
         },
         "config": {
@@ -74,11 +85,15 @@
                                 "$ref": "#/$defs/option"
                             }
                         },
-                        { "type": "null" }
+                        {
+                            "type": "null"
+                        }
                     ]
                 }
             },
-            "required": ["name"],
+            "required": [
+                "name"
+            ],
             "additionalProperties": false
         },
         "option": {
@@ -86,7 +101,10 @@
             "properties": {
                 "type": {
                     "type": "string",
-                    "enum": ["list", "option"]
+                    "enum": [
+                        "list",
+                        "option"
+                    ]
                 },
                 "name": {
                     "type": "string"
@@ -95,7 +113,11 @@
                     "type": "string"
                 }
             },
-            "required": ["type", "name", "value"],
+            "required": [
+                "type",
+                "name",
+                "value"
+            ],
             "additionalProperties": false
         }
     }

internal/spec/uci/spec.go

@@ -5,7 +5,10 @@ import (
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 )
 
-const NameUCI spec.Name = "uci.emissary.cadoles.com"
+const (
+	Name    string = "uci.emissary.cadoles.com"
+	Version string = "0.0.0"
+)
 
 type Spec struct {
 	Revision           int                     `json:"revision"`
@@ -18,8 +21,12 @@ type UCIPostImportCommand struct {
 	Args    []string `json:"args"`
 }
 
-func (s *Spec) SpecName() spec.Name {
-	return NameUCI
+func (s *Spec) SpecDefinitionName() string {
+	return Name
+}
+
+func (s *Spec) SpecDefinitionVersion() string {
+	return Version
 }
 
 func (s *Spec) SpecRevision() int {

internal/spec/uci/validator_test.go

@@ -3,9 +3,10 @@ package uci
 import (
 	"context"
 	"encoding/json"
-	"io/ioutil"
+	"os"
 	"testing"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore/memory"
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
@@ -32,17 +33,21 @@ var validatorTestCases = []validatorTestCase{
 func TestValidator(t *testing.T) {
 	t.Parallel()
 
-	validator := spec.NewValidator()
-	if err := validator.Register(NameUCI, schema); err != nil {
+	ctx := context.Background()
+
+	repo := memory.NewSpecDefinitionRepository()
+	if _, err := repo.Upsert(ctx, Name, Version, schema); err != nil {
 		t.Fatalf("+%v", errors.WithStack(err))
 	}
 
+	validator := spec.NewValidator(repo)
+
 	for _, tc := range validatorTestCases {
 		func(tc validatorTestCase) {
 			t.Run(tc.Name, func(t *testing.T) {
 				t.Parallel()
 
-				rawSpec, err := ioutil.ReadFile(tc.Source)
+				rawSpec, err := os.ReadFile(tc.Source)
 				if err != nil {
 					t.Fatalf("+%v", errors.WithStack(err))
 				}

internal/spec/validator.go

@@ -4,29 +4,35 @@ import (
 	"context"
 	"encoding/json"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
 	"github.com/pkg/errors"
 	"github.com/qri-io/jsonschema"
 )
 
 type Validator struct {
-	schemas map[Name]*jsonschema.Schema
-}
-
-func (v *Validator) Register(name Name, rawSchema []byte) error {
-	schema := &jsonschema.Schema{}
-	if err := json.Unmarshal(rawSchema, schema); err != nil {
-		return errors.Wrapf(err, "could not register spec shema '%s'", name)
-	}
-
-	v.schemas[name] = schema
-
-	return nil
+	repo datastore.SpecDefinitionRepository
 }
 
 func (v *Validator) Validate(ctx context.Context, spec Spec) error {
-	schema, exists := v.schemas[spec.SpecName()]
-	if !exists {
-		return errors.WithStack(ErrUnknownSchema)
+	name := spec.SpecDefinitionName()
+
+	version := spec.SpecDefinitionVersion()
+	if version == "" {
+		version = DefaultVersion
+	}
+
+	specDef, err := v.repo.Get(ctx, name, version)
+	if err != nil {
+		if errors.Is(err, datastore.ErrNotFound) {
+			return errors.WithStack(ErrUnknownSchema)
+		}
+
+		return errors.WithStack(err)
+	}
+
+	schema := &jsonschema.Schema{}
+	if err := json.Unmarshal(specDef.Schema, schema); err != nil {
+		return errors.WithStack(err)
 	}
 
 	state := schema.Validate(ctx, map[string]any(spec.SpecData()))
@@ -37,26 +43,8 @@ func (v *Validator) Validate(ctx context.Context, spec Spec) error {
 	return nil
 }
 
-func NewValidator() *Validator {
+func NewValidator(repo datastore.SpecDefinitionRepository) *Validator {
 	return &Validator{
-		schemas: make(map[Name]*jsonschema.Schema),
+		repo: repo,
 	}
 }
-
-var defaultValidator = NewValidator()
-
-func Register(name Name, rawSchema []byte) error {
-	if err := defaultValidator.Register(name, rawSchema); err != nil {
-		return errors.WithStack(err)
-	}
-
-	return nil
-}
-
-func Validate(ctx context.Context, spec Spec) error {
-	if err := defaultValidator.Validate(ctx, spec); err != nil {
-		return errors.WithStack(err)
-	}
-
-	return nil
-}

migrations/sqlite/0000004_spec_definition.down.sql

@@ -0,0 +1 @@
+DROP TABLE spec_definitions;

migrations/sqlite/0000004_spec_definition.up.sql

@@ -0,0 +1,9 @@
+CREATE TABLE
+    spec_definitions (
+        name TEXT NOT NULL,
+        version TEXT NOT NULL,
+        schema TEXT NOT NULL,
+        created_at datetime NOT NULL,
+        updated_at datetime NOT NULL,
+        UNIQUE (name, version)
+    );

migrations/sqlite/0000005_spec_version.down.sql

@@ -0,0 +1,35 @@
+ALTER TABLE specs
+RENAME TO _specs;
+
+CREATE TABLE
+    specs (
+        id INTEGER PRIMARY KEY,
+        agent_id INTEGER,
+        tenant_id TEXT,
+        name TEXT NOT NULL,
+        revision INTEGER DEFAULT 0,
+        data TEXT,
+        created_at datetime NOT NULL,
+        updated_at datetime NOT NULL,
+        FOREIGN KEY (tenant_id) REFERENCES tenants (id),
+        FOREIGN KEY (agent_id) REFERENCES agents (id) ON DELETE CASCADE,
+        UNIQUE (agent_id, name) ON CONFLICT REPLACE
+    );
+
+INSERT INTO
+    specs
+SELECT
+    id,
+    agent_id,
+    tenant_id,
+    name,
+    revision,
+    data,
+    created_at,
+    updated_at
+FROM
+    _specs;
+
+DROP TABLE _specs;
+
+---

migrations/sqlite/0000005_spec_version.up.sql

@@ -0,0 +1,36 @@
+-- Add unique constraint on name/version to specs
+ALTER TABLE specs
+RENAME TO _specs;
+
+CREATE TABLE
+    specs (
+        id INTEGER PRIMARY KEY,
+        agent_id INTEGER,
+        tenant_id TEXT,
+        name TEXT NOT NULL,
+        version TEXT NOT NULL,
+        revision INTEGER DEFAULT 0,
+        data TEXT,
+        created_at datetime NOT NULL,
+        updated_at datetime NOT NULL,
+        FOREIGN KEY (tenant_id) REFERENCES tenants (id),
+        FOREIGN KEY (agent_id) REFERENCES agents (id) ON DELETE CASCADE,
+        UNIQUE (agent_id, name, version) ON CONFLICT REPLACE
+    );
+
+INSERT INTO
+    specs
+SELECT
+    id,
+    agent_id,
+    tenant_id,
+    name,
+    "0.0.0",
+    revision,
+    data,
+    created_at,
+    updated_at
+FROM
+    _specs;
+
+DROP TABLE _specs;

pkg/client/alias.go

@@ -8,8 +8,7 @@ import (
 )
 
 type (
-	Spec     = spec.Spec
-	SpecName = spec.Name
+	Spec = spec.Spec
 )
 
 type (

pkg/client/delete_agent_spec.go

@@ -4,30 +4,32 @@ import (
 	"context"
 	"fmt"
 
-	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
 
-func (c *Client) DeleteAgentSpec(ctx context.Context, agentID AgentID, name SpecName, funcs ...OptionFunc) (SpecName, error) {
+func (c *Client) DeleteAgentSpec(ctx context.Context, agentID AgentID, name string, version string, funcs ...OptionFunc) (string, string, error) {
 	payload := struct {
-		Name spec.Name `json:"name"`
+		Name    string `json:"name"`
+		Version string `json:"version"`
 	}{
-		Name: name,
+		Name:    name,
+		Version: version,
 	}
 
 	response := withResponse[struct {
-		Name spec.Name `json:"name"`
+		Name    string `json:"name"`
+		Version string `json:"version"`
 	}]()
 
 	path := fmt.Sprintf("/api/v1/agents/%d/specs", agentID)
 
 	if err := c.apiDelete(ctx, path, payload, &response, funcs...); err != nil {
-		return "", errors.WithStack(err)
+		return "", "", errors.WithStack(err)
 	}
 
 	if response.Error != nil {
-		return "", errors.WithStack(response.Error)
+		return "", "", errors.WithStack(response.Error)
 	}
 
-	return response.Data.Name, nil
+	return response.Data.Name, response.Data.Version, nil
 }

pkg/client/get_agent_specs.go

@@ -4,13 +4,14 @@ import (
 	"context"
 	"fmt"
 
+	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
 	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
 
 func (c *Client) GetAgentSpecs(ctx context.Context, agentID AgentID, funcs ...OptionFunc) ([]Spec, error) {
 	response := withResponse[struct {
-		Specs []*spec.RawSpec `json:"specs"`
+		Specs []*datastore.Spec `json:"specs"`
 	}]()
 
 	path := fmt.Sprintf("/api/v1/agents/%d/specs", agentID)

pkg/client/update_agent_spec.go

@@ -6,17 +6,18 @@ import (
 
 	"forge.cadoles.com/Cadoles/emissary/internal/agent/metadata"
 	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
-	"forge.cadoles.com/Cadoles/emissary/internal/spec"
 	"github.com/pkg/errors"
 )
 
 func (c *Client) UpdateAgentSpec(ctx context.Context, agentID AgentID, spc Spec, funcs ...OptionFunc) (Spec, error) {
 	payload := struct {
-		Name     spec.Name         `json:"name"`
+		Name     string            `json:"name"`
+		Version  string            `json:"version"`
 		Revision int               `json:"revision"`
 		Data     metadata.Metadata `json:"data"`
 	}{
-		Name:     spc.SpecName(),
+		Name:     spc.SpecDefinitionName(),
+		Version:  spc.SpecDefinitionVersion(),
 		Revision: spc.SpecRevision(),
 		Data:     spc.SpecData(),
 	}