mats/go-cart-actor
1
0
Fork 0
Code Issues Pull Requests 1 Actions 3 Packages Projects Releases Wiki Activity

all the refactor
Build and Publish / BuildAndDeployAmd64 (push) Failing after 5s
Details
Build and Publish / BuildAndDeployArm64 (push) Failing after 6s
Details

Browse Source
This commit is contained in:
mats
2026-06-28 17:51:52 +02:00
parent 7db0d236c7
commit aa8b2bdedc
84 changed files with 4328 additions and 2344 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkg/cart/mcp/jsonrpc.go
-44
View File
@@ -1,44 +0,0 @@
package mcp
import "encoding/json"
// JSON-RPC 2.0 envelope types (the wire format MCP rides on). Notifications are
// requests with no id and must not receive a response.
type rpcRequest struct {
JSONRPC string `json:"jsonrpc"`
ID json.RawMessage `json:"id,omitempty"`
Method string `json:"method"`
Params json.RawMessage `json:"params,omitempty"`
}
func (r *rpcRequest) isNotification() bool { return len(r.ID) == 0 }
type rpcResponse struct {
JSONRPC string `json:"jsonrpc"`
ID json.RawMessage `json:"id,omitempty"`
Result any `json:"result,omitempty"`
Error *rpcError `json:"error,omitempty"`
}
type rpcError struct {
Code int `json:"code"`
Message string `json:"message"`
Data any `json:"data,omitempty"`
}
const (
codeParseError = -32700
codeInvalidRequest = -32600
codeMethodNotFound = -32601
codeInvalidParams = -32602
codeInternalError = -32603
)
func result(id json.RawMessage, v any) *rpcResponse {
return &rpcResponse{JSONRPC: "2.0", ID: id, Result: v}
}
func errorResponse(id json.RawMessage, code int, msg string) *rpcResponse {
return &rpcResponse{JSONRPC: "2.0", ID: id, Error: &rpcError{Code: code, Message: msg}}
}
pkg/cart/mcp/mcp.go
+11 -121
View File
@@ -3,27 +3,25 @@
// (list items, change quantities, remove items, clear carts, apply vouchers,
// manage users, etc.).
//
// Transport is streamable HTTP (JSON-RPC 2.0 over POST). It is mounted by
// cmd/cart under /mcp on the same HTTP server as the cart API. Tools map
// 1:1 to cart grain read/apply operations; no restart is needed because every
// tool call goes through the shared grain pool.
// Transport (JSON-RPC 2.0 over streamable HTTP), dispatch, and the schema/result
// helpers live in platform/mcp; this package only defines the cart-specific
// tools and wires them to the grain pool. Mounted by cmd/cart under /mcp.
package mcp
import (
"context"
"encoding/json"
"io"
"net/http"
"git.k6n.net/mats/go-cart-actor/pkg/actor"
"git.k6n.net/mats/go-cart-actor/pkg/cart"
pmcp "git.k6n.net/mats/platform/mcp"
"net/http"
"google.golang.org/protobuf/proto"
)
const (
serverName = "cart"
serverVersion = "0.1.0"
protocolVersion = "2025-06-18"
serverName = "cart"
serverVersion = "0.1.0"
)
// Applier is the minimal grain-pool interface the cart MCP needs: read a
@@ -37,123 +35,15 @@ type Applier interface {
// Server is the MCP edge over the cart grain pool.
type Server struct {
applier Applier
tools []tool
mcp *pmcp.Server
}
// New builds an MCP server exposing the cart grain as tools.
func New(applier Applier) *Server {
s := &Server{applier: applier}
s.tools = s.buildTools()
s.mcp = pmcp.NewServer(pmcp.Info{Name: serverName, Version: serverVersion}, s.buildTools()...)
return s
}
// Handler returns the streamable-HTTP handler to mount (e.g. at /mcp).
func (s *Server) Handler() http.Handler {
return http.HandlerFunc(s.serveHTTP)
}
func (s *Server) serveHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
w.Header().Set("Allow", "POST")
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
return
}
body, err := io.ReadAll(io.LimitReader(r.Body, 4<<20))
if err != nil {
writeRPC(w, errorResponse(nil, codeParseError, "read error"))
return
}
if isBatch(body) {
var reqs []rpcRequest
if err := json.Unmarshal(body, &reqs); err != nil {
writeRPC(w, errorResponse(nil, codeParseError, "invalid JSON"))
return
}
var out []*rpcResponse
for i := range reqs {
if resp := s.dispatch(&reqs[i]); resp != nil {
out = append(out, resp)
}
}
if len(out) == 0 {
w.WriteHeader(http.StatusAccepted)
return
}
writeRPC(w, out)
return
}
var req rpcRequest
if err := json.Unmarshal(body, &req); err != nil {
writeRPC(w, errorResponse(nil, codeParseError, "invalid JSON"))
return
}
resp := s.dispatch(&req)
if resp == nil {
w.WriteHeader(http.StatusAccepted)
return
}
writeRPC(w, resp)
}
func (s *Server) dispatch(req *rpcRequest) *rpcResponse {
if req.JSONRPC != "2.0" {
if req.isNotification() {
return nil
}
return errorResponse(req.ID, codeInvalidRequest, "jsonrpc must be \"2.0\"")
}
switch req.Method {
case "initialize":
return result(req.ID, s.initialize(req.Params))
case "ping":
return result(req.ID, struct{}{})
case "tools/list":
return result(req.ID, map[string]any{"tools": s.tools})
case "tools/call":
return s.callTool(req)
case "notifications/initialized", "notifications/cancelled":
return nil
default:
if req.isNotification() {
return nil
}
return errorResponse(req.ID, codeMethodNotFound, "unknown method: "+req.Method)
}
}
func (s *Server) initialize(params json.RawMessage) map[string]any {
pv := protocolVersion
if len(params) > 0 {
var p struct {
ProtocolVersion string `json:"protocolVersion"`
}
if json.Unmarshal(params, &p) == nil && p.ProtocolVersion != "" {
pv = p.ProtocolVersion
}
}
return map[string]any{
"protocolVersion": pv,
"capabilities": map[string]any{"tools": map[string]any{}},
"serverInfo": map[string]any{"name": serverName, "version": serverVersion},
}
}
func isBatch(body []byte) bool {
for _, b := range body {
switch b {
case ' ', '\t', '\r', '\n':
continue
case '[':
return true
default:
return false
}
}
return false
}
func writeRPC(w http.ResponseWriter, v any) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_ = json.NewEncoder(w).Encode(v)
}
func (s *Server) Handler() http.Handler { return s.mcp.Handler() }
pkg/cart/mcp/tools.go
+68 -200
View File
@@ -4,107 +4,33 @@ import (
"context"
"encoding/json"
"fmt"
"log"
"git.k6n.net/mats/go-cart-actor/pkg/cart"
messages "git.k6n.net/mats/go-cart-actor/proto/cart"
pmcp "git.k6n.net/mats/platform/mcp"
)
// tool is one MCP tool: a name, a description, a JSON-Schema for its arguments,
// and the handler that runs it.
type tool struct {
Name string `json:"name"`
Description string `json:"description"`
InputSchema json.RawMessage `json:"inputSchema"`
invoke func(args json.RawMessage) (any, error) `json:"-"`
}
func (s *Server) callTool(req *rpcRequest) *rpcResponse {
var p struct {
Name string `json:"name"`
Arguments json.RawMessage `json:"arguments"`
}
if err := json.Unmarshal(req.Params, &p); err != nil {
return errorResponse(req.ID, codeInvalidParams, "invalid params")
}
// Extract UCP meta from arguments (UCP-Agent profile advertisement).
// Per the UCP spec, meta is a sibling key inside arguments:
// "arguments": { "meta": { "ucp-agent": { "profile": "..." } }, ... }
args := extractUCPAgentMeta(&p.Arguments)
var t *tool
for i := range s.tools {
if s.tools[i].Name == p.Name {
t = &s.tools[i]
break
}
}
if t == nil {
return errorResponse(req.ID, codeInvalidParams, "unknown tool: "+p.Name)
}
out, err := t.invoke(args)
if err != nil {
return result(req.ID, toolError(err))
}
return result(req.ID, toolText(out))
}
// extractUCPAgentMeta checks if the JSON arguments contain a "meta" key with
// a nested "ucp-agent.profile" field. If found, it logs the profile (for
// observability) and strips the "meta" key before returning the cleaned
// arguments to the tool handler, so the meta object does not leak into the
// tool's argument namespace.
func extractUCPAgentMeta(arguments *json.RawMessage) json.RawMessage {
if arguments == nil || len(*arguments) == 0 {
return *arguments
}
var obj map[string]json.RawMessage
if err := json.Unmarshal(*arguments, &obj); err != nil {
return *arguments
}
metaRaw, hasMeta := obj["meta"]
if !hasMeta {
return *arguments
}
// Try to extract the profile for observability.
var meta struct {
UCPAgent *struct {
Profile string `json:"profile"`
} `json:"ucp-agent"`
}
if err := json.Unmarshal(metaRaw, &meta); err == nil && meta.UCPAgent != nil && meta.UCPAgent.Profile != "" {
log.Printf("ucp-agent: profile=%s", meta.UCPAgent.Profile)
}
// Strip meta from arguments before passing to the tool handler.
delete(obj, "meta")
cleaned, err := json.Marshal(obj)
if err != nil {
return *arguments
}
return cleaned
}
func (s *Server) buildTools() []tool {
return []tool{
// buildTools returns the cart's MCP tools (transport/dispatch live in platform/mcp).
func (s *Server) buildTools() []pmcp.Tool {
return []pmcp.Tool{
{
Name: "get_cart",
Description: "Get the full state of a cart by its base62 cart id: items, totals, vouchers, promotions, user info, currency, language, checkout status, subscription details, and all applied/pending promotions with progress nudges.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
}, []string{"cartId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
g, err := s.applier.Get(context.Background(), uint64(id))
g, err := s.applier.Get(ctx, uint64(id))
if err != nil {
return nil, fmt.Errorf("get cart: %w", err)
}
@@ -114,21 +40,21 @@ func (s *Server) buildTools() []tool {
{
Name: "get_cart_items",
Description: "List all items in a cart with their SKU, name, quantity, unit price, total price, stock, tax rate, markings, custom fields, and optional child/parent relationships.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
}, []string{"cartId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
g, err := s.applier.Get(context.Background(), uint64(id))
g, err := s.applier.Get(ctx, uint64(id))
if err != nil {
return nil, fmt.Errorf("get cart: %w", err)
}
@@ -138,21 +64,21 @@ func (s *Server) buildTools() []tool {
{
Name: "get_cart_totals",
Description: "Get price breakdown for a cart: total incVat, total exVat, VAT breakdown by rate, total discount (vouchers + promotions), and per-item totals.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
}, []string{"cartId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
g, err := s.applier.Get(context.Background(), uint64(id))
g, err := s.applier.Get(ctx, uint64(id))
if err != nil {
return nil, fmt.Errorf("get cart: %w", err)
}
@@ -168,21 +94,21 @@ func (s *Server) buildTools() []tool {
{
Name: "get_cart_promotions",
Description: "Get all applied and pending promotions on a cart, including discount amounts and progress nudges (e.g. 'spend 1200 SEK more for free shipping').",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
}, []string{"cartId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
g, err := s.applier.Get(context.Background(), uint64(id))
g, err := s.applier.Get(ctx, uint64(id))
if err != nil {
return nil, fmt.Errorf("get cart: %w", err)
}
@@ -195,21 +121,21 @@ func (s *Server) buildTools() []tool {
{
Name: "get_cart_vouchers",
Description: "List all vouchers applied to a cart with their codes, values, rules, and whether they are currently active.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
}, []string{"cartId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
g, err := s.applier.Get(context.Background(), uint64(id))
g, err := s.applier.Get(ctx, uint64(id))
if err != nil {
return nil, fmt.Errorf("get cart: %w", err)
}
@@ -219,25 +145,25 @@ func (s *Server) buildTools() []tool {
{
Name: "update_item_quantity",
Description: "Change the quantity of a line item in a cart. Use quantity=0 to remove the item. Returns the updated cart state.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
"itemId": integer("the line item id (numeric, e.g. 1, 2, 3)"),
"quantity": integer("the new quantity (0 removes the item)"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
"itemId": pmcp.Integer("the line item id (numeric, e.g. 1, 2, 3)"),
"quantity": pmcp.Integer("the new quantity (0 removes the item)"),
}, []string{"cartId", "itemId", "quantity"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
ItemID int `json:"itemId"`
Quantity int32 `json:"quantity"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
res, err := s.applier.Apply(context.Background(), uint64(id), &messages.ChangeQuantity{
res, err := s.applier.Apply(ctx, uint64(id), &messages.ChangeQuantity{
Id: uint32(a.ItemID),
Quantity: a.Quantity,
})
@@ -256,23 +182,23 @@ func (s *Server) buildTools() []tool {
{
Name: "remove_cart_item",
Description: "Remove a line item (and its children) from a cart by item id. Returns the updated cart state.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
"itemId": integer("the line item id to remove (numeric, e.g. 1, 2, 3)"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
"itemId": pmcp.Integer("the line item id to remove (numeric, e.g. 1, 2, 3)"),
}, []string{"cartId", "itemId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
ItemID int `json:"itemId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
res, err := s.applier.Apply(context.Background(), uint64(id), &messages.RemoveItem{Id: uint32(a.ItemID)})
res, err := s.applier.Apply(ctx, uint64(id), &messages.RemoveItem{Id: uint32(a.ItemID)})
if err != nil {
return nil, fmt.Errorf("remove item: %w", err)
}
@@ -287,21 +213,21 @@ func (s *Server) buildTools() []tool {
{
Name: "clear_cart",
Description: "Remove all items and vouchers from a cart, resetting it to an empty state. The cart id, user id, and currency are preserved. Returns the updated (empty) cart.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
}, []string{"cartId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
res, err := s.applier.Apply(context.Background(), uint64(id), &messages.ClearCartRequest{})
res, err := s.applier.Apply(ctx, uint64(id), &messages.ClearCartRequest{})
if err != nil {
return nil, fmt.Errorf("clear cart: %w", err)
}
@@ -316,14 +242,14 @@ func (s *Server) buildTools() []tool {
{
Name: "apply_voucher",
Description: "Apply a voucher code to a cart. The voucher value is in öre (e.g. 10000 = 100 kr). Returns the updated cart with the voucher applied.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
"code": str("the voucher code"),
"value": integer("the voucher value in öre (e.g. 10000 = 100 kr)"),
"description": str("optional description of the voucher"),
"rules": stringArray("optional list of rule expressions for when the voucher applies"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
"code": pmcp.String("the voucher code"),
"value": pmcp.Integer("the voucher value in öre (e.g. 10000 = 100 kr)"),
"description": pmcp.String("optional description of the voucher"),
"rules": pmcp.StringArray("optional list of rule expressions for when the voucher applies"),
}, []string{"cartId", "code", "value"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
Code string `json:"code"`
@@ -331,14 +257,14 @@ func (s *Server) buildTools() []tool {
Description string `json:"description"`
Rules []string `json:"rules"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
res, err := s.applier.Apply(context.Background(), uint64(id), &messages.AddVoucher{
res, err := s.applier.Apply(ctx, uint64(id), &messages.AddVoucher{
Code: a.Code,
Value: a.Value,
Description: a.Description,
@@ -358,23 +284,23 @@ func (s *Server) buildTools() []tool {
{
Name: "remove_voucher",
Description: "Remove a voucher from a cart by its voucher id. Returns the updated cart.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
"voucherId": integer("the voucher id to remove (numeric)"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
"voucherId": pmcp.Integer("the voucher id to remove (numeric)"),
}, []string{"cartId", "voucherId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
VoucherID int `json:"voucherId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
res, err := s.applier.Apply(context.Background(), uint64(id), &messages.RemoveVoucher{Id: uint32(a.VoucherID)})
res, err := s.applier.Apply(ctx, uint64(id), &messages.RemoveVoucher{Id: uint32(a.VoucherID)})
if err != nil {
return nil, fmt.Errorf("remove voucher: %w", err)
}
@@ -389,23 +315,23 @@ func (s *Server) buildTools() []tool {
{
Name: "set_cart_user",
Description: "Set or update the user ID on a cart, linking it to a customer account. Returns the updated cart.",
InputSchema: object(props{
"cartId": str("the base62 cart id"),
"userId": str("the user/customer id"),
InputSchema: pmcp.Object(pmcp.Props{
"cartId": pmcp.String("the base62 cart id"),
"userId": pmcp.String("the user/customer id"),
}, []string{"cartId", "userId"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(ctx context.Context, args json.RawMessage) (any, error) {
var a struct {
CartID string `json:"cartId"`
UserID string `json:"userId"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
id, ok := cart.ParseCartId(a.CartID)
if !ok {
return nil, fmt.Errorf("invalid cart id %q", a.CartID)
}
res, err := s.applier.Apply(context.Background(), uint64(id), &messages.SetUserId{UserId: a.UserID})
res, err := s.applier.Apply(ctx, uint64(id), &messages.SetUserId{UserId: a.UserID})
if err != nil {
return nil, fmt.Errorf("set user: %w", err)
}
@@ -421,61 +347,3 @@ func (s *Server) buildTools() []tool {
}
// ---- result + schema helpers -----------------------------------------------
func toolText(v any) map[string]any {
b, err := json.Marshal(v)
if err != nil {
return toolError(err)
}
return map[string]any{
"content": []map[string]any{{"type": "text", "text": string(b)}},
}
}
func toolError(err error) map[string]any {
return map[string]any{
"isError": true,
"content": []map[string]any{{"type": "text", "text": err.Error()}},
}
}
// decode unmarshals tool arguments, tolerating empty/absent arguments.
func decode(args json.RawMessage, v any) error {
if len(args) == 0 || string(args) == "null" {
return nil
}
if err := json.Unmarshal(args, v); err != nil {
return fmt.Errorf("invalid arguments: %w", err)
}
return nil
}
type props map[string]json.RawMessage
func object(p props, required []string) json.RawMessage {
m := map[string]any{
"type": "object",
"properties": p,
}
if len(required) > 0 {
m["required"] = required
}
b, _ := json.Marshal(m)
return b
}
func str(desc string) json.RawMessage { return scalar("string", desc) }
func integer(d string) json.RawMessage { return scalar("integer", d) }
func obj(desc string) json.RawMessage { return scalar("object", desc) }
func scalar(typ, desc string) json.RawMessage {
b, _ := json.Marshal(map[string]any{"type": typ, "description": desc})
return b
}
func stringArray(desc string) json.RawMessage {
b, _ := json.Marshal(map[string]any{
"type": "array", "description": desc, "items": map[string]string{"type": "string"},
})
return b
}