diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..c15d382
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/extism/go-pdk v1.1.3 h1:hfViMPWrqjN6u67cIYRALZTZLk/enSPpNKa+rZ9X2SQ=
+github.com/extism/go-pdk v1.1.3/go.mod h1:Gz+LIU/YCKnKXhgge8yo5Yu1F/lbv7KtKFkiCSzW/P4=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..940d38e
--- /dev/null
+++ b/main.go
@@ -0,0 +1,512 @@
+package main
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/extism/go-pdk"
+)
+
+// GenerateInput represents the input for the generate function
+type GenerateInput struct {
+	Credential string `json:"credential"` // Base64-encoded PublicKeyCredential
+}
+
+// GenerateOutput represents the output of the generate function
+type GenerateOutput struct {
+	DID      string `json:"did"`
+	Database []byte `json:"database"`
+}
+
+// LoadInput represents the input for the load function
+type LoadInput struct {
+	Database []byte `json:"database"`
+}
+
+// LoadOutput represents the output of the load function
+type LoadOutput struct {
+	Success bool   `json:"success"`
+	DID     string `json:"did,omitempty"`
+	Error   string `json:"error,omitempty"`
+}
+
+// ExecInput represents the input for the exec function
+type ExecInput struct {
+	Filter string `json:"filter"` // GitHub-style filter: "resource:accounts action:sign"
+	Token  string `json:"token"`  // UCAN token for authorization
+}
+
+// ExecOutput represents the output of the exec function
+type ExecOutput struct {
+	Success bool            `json:"success"`
+	Result  json.RawMessage `json:"result,omitempty"`
+	Error   string          `json:"error,omitempty"`
+}
+
+// QueryInput represents the input for the query function
+type QueryInput struct {
+	DID string `json:"did"`
+}
+
+// QueryOutput represents the output of the query function
+type QueryOutput struct {
+	DID                 string               `json:"did"`
+	Controller          string               `json:"controller"`
+	VerificationMethods []VerificationMethod `json:"verification_methods"`
+	Accounts            []Account            `json:"accounts"`
+	Credentials         []Credential         `json:"credentials"`
+}
+
+// VerificationMethod represents a DID verification method
+type VerificationMethod struct {
+	ID         string `json:"id"`
+	Type       string `json:"type"`
+	Controller string `json:"controller"`
+	PublicKey  string `json:"public_key"`
+	Purpose    string `json:"purpose"`
+}
+
+// Account represents a derived blockchain account
+type Account struct {
+	Address      string `json:"address"`
+	ChainID      string `json:"chain_id"`
+	CoinType     int    `json:"coin_type"`
+	AccountIndex int    `json:"account_index"`
+	AddressIndex int    `json:"address_index"`
+	Label        string `json:"label"`
+	IsDefault    bool   `json:"is_default"`
+}
+
+// Credential represents a WebAuthn credential
+type Credential struct {
+	CredentialID  string   `json:"credential_id"`
+	DeviceName    string   `json:"device_name"`
+	DeviceType    string   `json:"device_type"`
+	Authenticator string   `json:"authenticator"`
+	Transports    []string `json:"transports"`
+	CreatedAt     string   `json:"created_at"`
+	LastUsed      string   `json:"last_used"`
+}
+
+// FilterParams parsed from GitHub-style filter syntax
+type FilterParams struct {
+	Resource string
+	Action   string
+	Subject  string
+}
+
+// Enclave holds the plugin state
+type Enclave struct {
+	initialized bool
+	did         string
+}
+
+var enclave = &Enclave{}
+
+func main() {}
+
+//go:wasmexport generate
+func generate() int32 {
+	pdk.Log(pdk.LogInfo, "generate: starting database initialization")
+
+	var input GenerateInput
+	if err := pdk.InputJSON(&input); err != nil {
+		pdk.SetError(fmt.Errorf("generate: failed to parse input: %w", err))
+		return 1
+	}
+
+	if input.Credential == "" {
+		pdk.SetError(errors.New("generate: credential is required"))
+		return 1
+	}
+
+	credentialBytes, err := base64.StdEncoding.DecodeString(input.Credential)
+	if err != nil {
+		pdk.SetError(fmt.Errorf("generate: invalid base64 credential: %w", err))
+		return 1
+	}
+
+	did, err := initializeDatabase(credentialBytes)
+	if err != nil {
+		pdk.SetError(fmt.Errorf("generate: failed to initialize database: %w", err))
+		return 1
+	}
+
+	enclave.initialized = true
+	enclave.did = did
+
+	dbBytes, err := serializeDatabase()
+	if err != nil {
+		pdk.SetError(fmt.Errorf("generate: failed to serialize database: %w", err))
+		return 1
+	}
+
+	output := GenerateOutput{
+		DID:      did,
+		Database: dbBytes,
+	}
+
+	if err := pdk.OutputJSON(output); err != nil {
+		pdk.SetError(fmt.Errorf("generate: failed to output result: %w", err))
+		return 1
+	}
+
+	pdk.Log(pdk.LogInfo, fmt.Sprintf("generate: created DID %s", did))
+	return 0
+}
+
+//go:wasmexport load
+func load() int32 {
+	pdk.Log(pdk.LogInfo, "load: loading database from buffer")
+
+	var input LoadInput
+	if err := pdk.InputJSON(&input); err != nil {
+		pdk.SetError(fmt.Errorf("load: failed to parse input: %w", err))
+		return 1
+	}
+
+	if len(input.Database) == 0 {
+		pdk.SetError(errors.New("load: database buffer is required"))
+		return 1
+	}
+
+	did, err := loadDatabase(input.Database)
+	if err != nil {
+		output := LoadOutput{
+			Success: false,
+			Error:   err.Error(),
+		}
+		pdk.OutputJSON(output)
+		return 1
+	}
+
+	enclave.initialized = true
+	enclave.did = did
+
+	output := LoadOutput{
+		Success: true,
+		DID:     did,
+	}
+
+	if err := pdk.OutputJSON(output); err != nil {
+		pdk.SetError(fmt.Errorf("load: failed to output result: %w", err))
+		return 1
+	}
+
+	pdk.Log(pdk.LogInfo, fmt.Sprintf("load: loaded database for DID %s", did))
+	return 0
+}
+
+//go:wasmexport exec
+func exec() int32 {
+	pdk.Log(pdk.LogInfo, "exec: executing action")
+
+	if !enclave.initialized {
+		pdk.SetError(errors.New("exec: database not initialized, call generate or load first"))
+		return 1
+	}
+
+	var input ExecInput
+	if err := pdk.InputJSON(&input); err != nil {
+		pdk.SetError(fmt.Errorf("exec: failed to parse input: %w", err))
+		return 1
+	}
+
+	if input.Filter == "" {
+		pdk.SetError(errors.New("exec: filter is required"))
+		return 1
+	}
+
+	params, err := parseFilter(input.Filter)
+	if err != nil {
+		pdk.SetError(fmt.Errorf("exec: invalid filter: %w", err))
+		return 1
+	}
+
+	if input.Token != "" {
+		if err := validateUCAN(input.Token, params); err != nil {
+			output := ExecOutput{
+				Success: false,
+				Error:   fmt.Sprintf("authorization failed: %s", err.Error()),
+			}
+			pdk.OutputJSON(output)
+			return 1
+		}
+	}
+
+	result, err := executeAction(params)
+	if err != nil {
+		output := ExecOutput{
+			Success: false,
+			Error:   err.Error(),
+		}
+		pdk.OutputJSON(output)
+		return 1
+	}
+
+	output := ExecOutput{
+		Success: true,
+		Result:  result,
+	}
+
+	if err := pdk.OutputJSON(output); err != nil {
+		pdk.SetError(fmt.Errorf("exec: failed to output result: %w", err))
+		return 1
+	}
+
+	pdk.Log(pdk.LogInfo, fmt.Sprintf("exec: completed %s on %s", params.Action, params.Resource))
+	return 0
+}
+
+//go:wasmexport query
+func query() int32 {
+	pdk.Log(pdk.LogInfo, "query: resolving DID document")
+
+	if !enclave.initialized {
+		pdk.SetError(errors.New("query: database not initialized, call generate or load first"))
+		return 1
+	}
+
+	var input QueryInput
+	if err := pdk.InputJSON(&input); err != nil {
+		pdk.SetError(fmt.Errorf("query: failed to parse input: %w", err))
+		return 1
+	}
+
+	if input.DID == "" {
+		input.DID = enclave.did
+	}
+
+	if !strings.HasPrefix(input.DID, "did:") {
+		pdk.SetError(errors.New("query: invalid DID format"))
+		return 1
+	}
+
+	output, err := resolveDID(input.DID)
+	if err != nil {
+		pdk.SetError(fmt.Errorf("query: failed to resolve DID: %w", err))
+		return 1
+	}
+
+	if err := pdk.OutputJSON(output); err != nil {
+		pdk.SetError(fmt.Errorf("query: failed to output result: %w", err))
+		return 1
+	}
+
+	pdk.Log(pdk.LogInfo, fmt.Sprintf("query: resolved DID %s", input.DID))
+	return 0
+}
+
+func initializeDatabase(credentialBytes []byte) (string, error) {
+	// TODO: Initialize SQLite database with schema
+	// TODO: Parse WebAuthn credential
+	// TODO: Generate MPC key shares
+	// TODO: Create DID document
+	// TODO: Insert initial records
+
+	did := fmt.Sprintf("did:sonr:%x", credentialBytes[:16])
+
+	pdk.Log(pdk.LogDebug, "initializeDatabase: created schema and initial records")
+	return did, nil
+}
+
+func serializeDatabase() ([]byte, error) {
+	// TODO: Serialize SQLite database to bytes
+	// TODO: Encrypt with WebAuthn-derived key
+	return []byte("placeholder_database"), nil
+}
+
+func loadDatabase(data []byte) (string, error) {
+	// TODO: Decrypt database with WebAuthn-derived key
+	// TODO: Load SQLite database from bytes
+	// TODO: Query for primary DID
+
+	if len(data) < 10 {
+		return "", errors.New("invalid database format")
+	}
+
+	did := "did:sonr:loaded"
+	pdk.Log(pdk.LogDebug, "loadDatabase: database loaded successfully")
+	return did, nil
+}
+
+func parseFilter(filter string) (*FilterParams, error) {
+	params := &FilterParams{}
+	parts := strings.Fields(filter)
+
+	for _, part := range parts {
+		kv := strings.SplitN(part, ":", 2)
+		if len(kv) != 2 {
+			continue
+		}
+
+		key, value := kv[0], kv[1]
+		switch key {
+		case "resource":
+			params.Resource = value
+		case "action":
+			params.Action = value
+		case "subject":
+			params.Subject = value
+		}
+	}
+
+	if params.Resource == "" {
+		return nil, errors.New("resource is required")
+	}
+	if params.Action == "" {
+		return nil, errors.New("action is required")
+	}
+
+	return params, nil
+}
+
+func validateUCAN(token string, params *FilterParams) error {
+	// TODO: Decode UCAN token
+	// TODO: Verify signature chain
+	// TODO: Check capabilities match params
+	// TODO: Verify not expired or revoked
+
+	if token == "" {
+		return errors.New("token is required")
+	}
+
+	pdk.Log(pdk.LogDebug, fmt.Sprintf("validateUCAN: validated token for %s:%s", params.Resource, params.Action))
+	return nil
+}
+
+func executeAction(params *FilterParams) (json.RawMessage, error) {
+	// TODO: Route to appropriate handler based on resource/action
+	// TODO: Execute database queries
+	// TODO: Return results
+
+	switch params.Resource {
+	case "accounts":
+		return executeAccountAction(params)
+	case "credentials":
+		return executeCredentialAction(params)
+	case "sessions":
+		return executeSessionAction(params)
+	case "grants":
+		return executeGrantAction(params)
+	default:
+		return nil, fmt.Errorf("unknown resource: %s", params.Resource)
+	}
+}
+
+func executeAccountAction(params *FilterParams) (json.RawMessage, error) {
+	switch params.Action {
+	case "list":
+		accounts := []Account{
+			{
+				Address:      "sonr1abc123...",
+				ChainID:      "sonr-mainnet-1",
+				CoinType:     118,
+				AccountIndex: 0,
+				AddressIndex: 0,
+				Label:        "Primary",
+				IsDefault:    true,
+			},
+		}
+		return json.Marshal(accounts)
+	case "sign":
+		return json.Marshal(map[string]string{"signature": "placeholder"})
+	default:
+		return nil, fmt.Errorf("unknown action for accounts: %s", params.Action)
+	}
+}
+
+func executeCredentialAction(params *FilterParams) (json.RawMessage, error) {
+	switch params.Action {
+	case "list":
+		credentials := []Credential{
+			{
+				CredentialID:  "cred_abc123",
+				DeviceName:    "MacBook Pro",
+				DeviceType:    "platform",
+				Authenticator: "Touch ID",
+				Transports:    []string{"internal"},
+				CreatedAt:     time.Now().Format(time.RFC3339),
+				LastUsed:      time.Now().Format(time.RFC3339),
+			},
+		}
+		return json.Marshal(credentials)
+	default:
+		return nil, fmt.Errorf("unknown action for credentials: %s", params.Action)
+	}
+}
+
+func executeSessionAction(params *FilterParams) (json.RawMessage, error) {
+	switch params.Action {
+	case "list":
+		return json.Marshal([]map[string]interface{}{})
+	case "create":
+		return json.Marshal(map[string]string{"session_id": "sess_placeholder"})
+	case "revoke":
+		return json.Marshal(map[string]bool{"revoked": true})
+	default:
+		return nil, fmt.Errorf("unknown action for sessions: %s", params.Action)
+	}
+}
+
+func executeGrantAction(params *FilterParams) (json.RawMessage, error) {
+	switch params.Action {
+	case "list":
+		return json.Marshal([]map[string]interface{}{})
+	case "create":
+		return json.Marshal(map[string]string{"grant_id": "grant_placeholder"})
+	case "revoke":
+		return json.Marshal(map[string]bool{"revoked": true})
+	default:
+		return nil, fmt.Errorf("unknown action for grants: %s", params.Action)
+	}
+}
+
+func resolveDID(did string) (*QueryOutput, error) {
+	// TODO: Query database for DID document
+	// TODO: Fetch verification methods
+	// TODO: Fetch associated accounts
+	// TODO: Fetch credentials
+
+	output := &QueryOutput{
+		DID:        did,
+		Controller: did,
+		VerificationMethods: []VerificationMethod{
+			{
+				ID:         did + "#key-1",
+				Type:       "Ed25519VerificationKey2020",
+				Controller: did,
+				PublicKey:  "placeholder_public_key",
+				Purpose:    "authentication",
+			},
+		},
+		Accounts: []Account{
+			{
+				Address:      "sonr1abc123...",
+				ChainID:      "sonr-mainnet-1",
+				CoinType:     118,
+				AccountIndex: 0,
+				AddressIndex: 0,
+				Label:        "Primary",
+				IsDefault:    true,
+			},
+		},
+		Credentials: []Credential{
+			{
+				CredentialID:  "cred_abc123",
+				DeviceName:    "MacBook Pro",
+				DeviceType:    "platform",
+				Authenticator: "Touch ID",
+				Transports:    []string{"internal"},
+				CreatedAt:     time.Now().Format(time.RFC3339),
+				LastUsed:      time.Now().Format(time.RFC3339),
+			},
+		},
+	}
+
+	return output, nil
+}