feat: add higress wasm go plugin development skill for Claude (#3402)

.claude/skills/higress-wasm-go-plugin/SKILL.md

@@ -0,0 +1,251 @@
+---
+name: higress-wasm-go-plugin
+description: Develop Higress WASM plugins using Go 1.24+. Use when creating, modifying, or debugging Higress gateway plugins for HTTP request/response processing, external service calls, Redis integration, or custom gateway logic.
+---
+
+# Higress WASM Go Plugin Development
+
+Develop Higress gateway WASM plugins using Go language with the `wasm-go` SDK.
+
+## Quick Start
+
+### Project Setup
+
+```bash
+# Create project directory
+mkdir my-plugin && cd my-plugin
+
+# Initialize Go module
+go mod init my-plugin
+
+# Set proxy (China)
+go env -w GOPROXY=https://proxy.golang.com.cn,direct
+
+# Download dependencies
+go get github.com/higress-group/proxy-wasm-go-sdk@go-1.24
+go get github.com/higress-group/wasm-go@main
+go get github.com/tidwall/gjson
+```
+
+### Minimal Plugin Template
+
+```go
+package main
+
+import (
+    "github.com/higress-group/wasm-go/pkg/wrapper"
+    "github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
+    "github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
+    "github.com/tidwall/gjson"
+)
+
+func main() {}
+
+func init() {
+    wrapper.SetCtx(
+        "my-plugin",
+        wrapper.ParseConfig(parseConfig),
+        wrapper.ProcessRequestHeaders(onHttpRequestHeaders),
+    )
+}
+
+type MyConfig struct {
+    Enabled bool
+}
+
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    config.Enabled = json.Get("enabled").Bool()
+    return nil
+}
+
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    if config.Enabled {
+        proxywasm.AddHttpRequestHeader("x-my-header", "hello")
+    }
+    return types.HeaderContinue
+}
+```
+
+### Compile
+
+```bash
+go mod tidy
+GOOS=wasip1 GOARCH=wasm go build -buildmode=c-shared -o main.wasm ./
+```
+
+## Core Concepts
+
+### Plugin Lifecycle
+
+1. **init()** - Register plugin with `wrapper.SetCtx()`
+2. **parseConfig** - Parse YAML config (auto-converted to JSON)
+3. **HTTP processing phases** - Handle requests/responses
+
+### HTTP Processing Phases
+
+| Phase | Trigger | Handler |
+|-------|---------|---------|
+| Request Headers | Gateway receives client request headers | `ProcessRequestHeaders` |
+| Request Body | Gateway receives client request body | `ProcessRequestBody` |
+| Response Headers | Gateway receives backend response headers | `ProcessResponseHeaders` |
+| Response Body | Gateway receives backend response body | `ProcessResponseBody` |
+| Stream Done | HTTP stream completes | `ProcessStreamDone` |
+
+### Action Return Values
+
+| Action | Behavior |
+|--------|----------|
+| `types.HeaderContinue` | Continue to next filter |
+| `types.HeaderStopIteration` | Stop header processing, wait for body |
+| `types.HeaderStopAllIterationAndWatermark` | Stop all processing, buffer data, call `proxywasm.ResumeHttpRequest/Response()` to resume |
+
+## API Reference
+
+### HttpContext Methods
+
+```go
+// Request info (cached, safe to call in any phase)
+ctx.Scheme()   // :scheme
+ctx.Host()     // :authority
+ctx.Path()     // :path
+ctx.Method()   // :method
+
+// Body handling
+ctx.HasRequestBody()        // Check if request has body
+ctx.HasResponseBody()       // Check if response has body
+ctx.DontReadRequestBody()   // Skip reading request body
+ctx.DontReadResponseBody()  // Skip reading response body
+ctx.BufferRequestBody()     // Buffer instead of stream
+ctx.BufferResponseBody()    // Buffer instead of stream
+
+// Content detection
+ctx.IsWebsocket()           // Check WebSocket upgrade
+ctx.IsBinaryRequestBody()   // Check binary content
+ctx.IsBinaryResponseBody()  // Check binary content
+
+// Context storage
+ctx.SetContext(key, value)
+ctx.GetContext(key)
+ctx.GetStringContext(key, defaultValue)
+ctx.GetBoolContext(key, defaultValue)
+
+// Custom logging
+ctx.SetUserAttribute(key, value)
+ctx.WriteUserAttributeToLog()
+```
+
+### Header/Body Operations (proxywasm)
+
+```go
+// Request headers
+proxywasm.GetHttpRequestHeader(name)
+proxywasm.AddHttpRequestHeader(name, value)
+proxywasm.ReplaceHttpRequestHeader(name, value)
+proxywasm.RemoveHttpRequestHeader(name)
+proxywasm.GetHttpRequestHeaders()
+proxywasm.ReplaceHttpRequestHeaders(headers)
+
+// Response headers
+proxywasm.GetHttpResponseHeader(name)
+proxywasm.AddHttpResponseHeader(name, value)
+proxywasm.ReplaceHttpResponseHeader(name, value)
+proxywasm.RemoveHttpResponseHeader(name)
+proxywasm.GetHttpResponseHeaders()
+proxywasm.ReplaceHttpResponseHeaders(headers)
+
+// Request body (only in body phase)
+proxywasm.GetHttpRequestBody(start, size)
+proxywasm.ReplaceHttpRequestBody(body)
+proxywasm.AppendHttpRequestBody(data)
+proxywasm.PrependHttpRequestBody(data)
+
+// Response body (only in body phase)
+proxywasm.GetHttpResponseBody(start, size)
+proxywasm.ReplaceHttpResponseBody(body)
+proxywasm.AppendHttpResponseBody(data)
+proxywasm.PrependHttpResponseBody(data)
+
+// Direct response
+proxywasm.SendHttpResponse(statusCode, headers, body, grpcStatus)
+
+// Flow control
+proxywasm.ResumeHttpRequest()   // Resume paused request
+proxywasm.ResumeHttpResponse()  // Resume paused response
+```
+
+## Common Patterns
+
+### External HTTP Call
+
+See [references/http-client.md](references/http-client.md) for complete HTTP client patterns.
+
+```go
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    serviceName := json.Get("serviceName").String()
+    servicePort := json.Get("servicePort").Int()
+    config.client = wrapper.NewClusterClient(wrapper.FQDNCluster{
+        FQDN: serviceName,
+        Port: servicePort,
+    })
+    return nil
+}
+
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    err := config.client.Get("/api/check", nil, func(statusCode int, headers http.Header, body []byte) {
+        if statusCode != 200 {
+            proxywasm.SendHttpResponse(403, nil, []byte("Forbidden"), -1)
+            return
+        }
+        proxywasm.ResumeHttpRequest()
+    }, 3000) // timeout ms
+    
+    if err != nil {
+        return types.HeaderContinue // fallback on error
+    }
+    return types.HeaderStopAllIterationAndWatermark
+}
+```
+
+### Redis Integration
+
+See [references/redis-client.md](references/redis-client.md) for complete Redis patterns.
+
+```go
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    config.redis = wrapper.NewRedisClusterClient(wrapper.FQDNCluster{
+        FQDN: json.Get("redisService").String(),
+        Port: json.Get("redisPort").Int(),
+    })
+    return config.redis.Init(
+        json.Get("username").String(),
+        json.Get("password").String(),
+        json.Get("timeout").Int(),
+    )
+}
+```
+
+### Multi-level Config
+
+插件配置支持在控制台不同级别设置：全局、域名级、路由级。控制面会自动处理配置的优先级和匹配逻辑，插件代码中通过 `parseConfig` 解析到的就是当前请求匹配到的配置。
+
+## Local Testing
+
+See [references/local-testing.md](references/local-testing.md) for Docker Compose setup.
+
+## Advanced Topics
+
+See [references/advanced-patterns.md](references/advanced-patterns.md) for:
+- Streaming body processing
+- Route call pattern
+- Tick functions (periodic tasks)
+- Leader election
+- Memory management
+- Custom logging
+
+## Best Practices
+
+1. **Never call Resume after SendHttpResponse** - Response auto-resumes
+2. **Check HasRequestBody() before returning HeaderStopIteration** - Avoids blocking
+3. **Use cached ctx methods** - `ctx.Path()` works in any phase, `GetHttpRequestHeader(":path")` only in header phase
+4. **Handle external call failures gracefully** - Return `HeaderContinue` on error to avoid blocking
+5. **Set appropriate timeouts** - Default HTTP call timeout is 500ms

.claude/skills/higress-wasm-go-plugin/references/advanced-patterns.md

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+# Advanced Patterns
+
+## Streaming Body Processing
+
+Process body chunks as they arrive without buffering:
+
+```go
+func init() {
+    wrapper.SetCtx(
+        "streaming-plugin",
+        wrapper.ParseConfig(parseConfig),
+        wrapper.ProcessStreamingRequestBody(onStreamingRequestBody),
+        wrapper.ProcessStreamingResponseBody(onStreamingResponseBody),
+    )
+}
+
+func onStreamingRequestBody(ctx wrapper.HttpContext, config MyConfig, chunk []byte, isLastChunk bool) []byte {
+    // Modify chunk and return
+    modified := bytes.ReplaceAll(chunk, []byte("old"), []byte("new"))
+    return modified
+}
+
+func onStreamingResponseBody(ctx wrapper.HttpContext, config MyConfig, chunk []byte, isLastChunk bool) []byte {
+    // Can call external services with NeedPauseStreamingResponse()
+    return chunk
+}
+```
+
+## Buffered Body Processing
+
+Buffer entire body before processing:
+
+```go
+func init() {
+    wrapper.SetCtx(
+        "buffered-plugin",
+        wrapper.ParseConfig(parseConfig),
+        wrapper.ProcessRequestBody(onRequestBody),
+        wrapper.ProcessResponseBody(onResponseBody),
+    )
+}
+
+func onRequestBody(ctx wrapper.HttpContext, config MyConfig, body []byte) types.Action {
+    // Full request body available
+    var data map[string]interface{}
+    json.Unmarshal(body, &data)
+    
+    // Modify and replace
+    data["injected"] = "value"
+    newBody, _ := json.Marshal(data)
+    proxywasm.ReplaceHttpRequestBody(newBody)
+    
+    return types.ActionContinue
+}
+```
+
+## Route Call Pattern
+
+Call the current route's upstream with modified request:
+
+```go
+func onRequestBody(ctx wrapper.HttpContext, config MyConfig, body []byte) types.Action {
+    err := ctx.RouteCall("POST", "/modified-path", [][2]string{
+        {"Content-Type", "application/json"},
+        {"X-Custom", "header"},
+    }, body, func(statusCode int, headers [][2]string, body []byte) {
+        // Handle response from upstream
+        proxywasm.SendHttpResponse(statusCode, headers, body, -1)
+    })
+    
+    if err != nil {
+        proxywasm.SendHttpResponse(500, nil, []byte("Route call failed"), -1)
+    }
+    return types.ActionContinue
+}
+```
+
+## Tick Functions (Periodic Tasks)
+
+Register periodic background tasks:
+
+```go
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    // Register tick functions during config parsing
+    wrapper.RegisterTickFunc(1000, func() {
+        // Executes every 1 second
+        log.Info("1s tick")
+    })
+    
+    wrapper.RegisterTickFunc(5000, func() {
+        // Executes every 5 seconds
+        log.Info("5s tick")
+    })
+    
+    return nil
+}
+```
+
+## Leader Election
+
+For tasks that should run on only one VM instance:
+
+```go
+func init() {
+    wrapper.SetCtx(
+        "leader-plugin",
+        wrapper.PrePluginStartOrReload(onPluginStart),
+        wrapper.ParseConfig(parseConfig),
+    )
+}
+
+func onPluginStart(ctx wrapper.PluginContext) error {
+    ctx.DoLeaderElection()
+    return nil
+}
+
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    wrapper.RegisterTickFunc(10000, func() {
+        if ctx.IsLeader() {
+            // Only leader executes this
+            log.Info("Leader task")
+        }
+    })
+    return nil
+}
+```
+
+## Plugin Context Storage
+
+Store data across requests at plugin level:
+
+```go
+type MyConfig struct {
+    // Config fields
+}
+
+func init() {
+    wrapper.SetCtx(
+        "context-plugin",
+        wrapper.ParseConfigWithContext(parseConfigWithContext),
+        wrapper.ProcessRequestHeaders(onHttpRequestHeaders),
+    )
+}
+
+func parseConfigWithContext(ctx wrapper.PluginContext, json gjson.Result, config *MyConfig) error {
+    // Store in plugin context (survives across requests)
+    ctx.SetContext("initTime", time.Now().Unix())
+    return nil
+}
+```
+
+## Rule-Level Config Isolation
+
+Enable graceful degradation when rule config parsing fails:
+
+```go
+func init() {
+    wrapper.SetCtx(
+        "isolated-plugin",
+        wrapper.PrePluginStartOrReload(func(ctx wrapper.PluginContext) error {
+            ctx.EnableRuleLevelConfigIsolation()
+            return nil
+        }),
+        wrapper.ParseOverrideConfig(parseGlobal, parseRule),
+    )
+}
+
+func parseGlobal(json gjson.Result, config *MyConfig) error {
+    // Parse global config
+    return nil
+}
+
+func parseRule(json gjson.Result, global MyConfig, config *MyConfig) error {
+    // Parse per-rule config, inheriting from global
+    *config = global // Copy global defaults
+    // Override with rule-specific values
+    return nil
+}
+```
+
+## Memory Management
+
+Configure automatic VM rebuild to prevent memory leaks:
+
+```go
+func init() {
+    wrapper.SetCtxWithOptions(
+        "memory-managed-plugin",
+        wrapper.ParseConfig(parseConfig),
+        wrapper.WithRebuildAfterRequests(10000),           // Rebuild after 10k requests
+        wrapper.WithRebuildMaxMemBytes(100*1024*1024),     // Rebuild at 100MB
+        wrapper.WithMaxRequestsPerIoCycle(20),             // Limit concurrent requests
+    )
+}
+```
+
+## Custom Logging
+
+Add structured fields to access logs:
+
+```go
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    // Set custom attributes
+    ctx.SetUserAttribute("user_id", "12345")
+    ctx.SetUserAttribute("request_type", "api")
+    
+    return types.HeaderContinue
+}
+
+func onHttpResponseHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    // Write to access log
+    ctx.WriteUserAttributeToLog()
+    
+    // Or write to trace spans
+    ctx.WriteUserAttributeToTrace()
+    
+    return types.HeaderContinue
+}
+```
+
+## Disable Re-routing
+
+Prevent Envoy from recalculating routes after header modification:
+
+```go
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    // Call BEFORE modifying headers
+    ctx.DisableReroute()
+    
+    // Now safe to modify headers without triggering re-route
+    proxywasm.ReplaceHttpRequestHeader(":path", "/new-path")
+    
+    return types.HeaderContinue
+}
+```
+
+## Buffer Limits
+
+Set per-request buffer limits to control memory usage:
+
+```go
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    // Allow larger request bodies for this request
+    ctx.SetRequestBodyBufferLimit(10 * 1024 * 1024) // 10MB
+    return types.HeaderContinue
+}
+
+func onHttpResponseHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    // Allow larger response bodies
+    ctx.SetResponseBodyBufferLimit(50 * 1024 * 1024) // 50MB
+    return types.HeaderContinue
+}
+```

.claude/skills/higress-wasm-go-plugin/references/http-client.md

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+# HTTP Client Reference
+
+## Cluster Types
+
+### FQDNCluster (Most Common)
+
+For services registered in Higress with FQDN:
+
+```go
+wrapper.NewClusterClient(wrapper.FQDNCluster{
+    FQDN: "my-service.dns",      // Service FQDN with suffix
+    Port: 8080,
+    Host: "optional-host-header", // Optional
+})
+```
+
+Common FQDN suffixes:
+- `.dns` - DNS service
+- `.static` - Static IP service (port defaults to 80)
+- `.nacos` - Nacos service
+
+### K8sCluster
+
+For Kubernetes services:
+
+```go
+wrapper.NewClusterClient(wrapper.K8sCluster{
+    ServiceName: "my-service",
+    Namespace:   "default",
+    Port:        8080,
+    Version:     "",    // Optional subset version
+})
+// Generates: outbound|8080||my-service.default.svc.cluster.local
+```
+
+### NacosCluster
+
+For Nacos registry services:
+
+```go
+wrapper.NewClusterClient(wrapper.NacosCluster{
+    ServiceName: "my-service",
+    Group:       "DEFAULT-GROUP",
+    NamespaceID: "public",
+    Port:        8080,
+    IsExtRegistry: false, // true for EDAS/SAE
+})
+```
+
+### StaticIpCluster
+
+For static IP services:
+
+```go
+wrapper.NewClusterClient(wrapper.StaticIpCluster{
+    ServiceName: "my-service",
+    Port:        8080,
+})
+// Generates: outbound|8080||my-service.static
+```
+
+### DnsCluster
+
+For DNS-resolved services:
+
+```go
+wrapper.NewClusterClient(wrapper.DnsCluster{
+    ServiceName: "my-service",
+    Domain:      "api.example.com",
+    Port:        443,
+})
+```
+
+### RouteCluster
+
+Use current route's upstream:
+
+```go
+wrapper.NewClusterClient(wrapper.RouteCluster{
+    Host: "optional-host-override",
+})
+```
+
+### TargetCluster
+
+Direct cluster name specification:
+
+```go
+wrapper.NewClusterClient(wrapper.TargetCluster{
+    Cluster: "outbound|8080||my-service.dns",
+    Host:    "api.example.com",
+})
+```
+
+## HTTP Methods
+
+```go
+client.Get(path, headers, callback, timeout...)
+client.Post(path, headers, body, callback, timeout...)
+client.Put(path, headers, body, callback, timeout...)
+client.Patch(path, headers, body, callback, timeout...)
+client.Delete(path, headers, body, callback, timeout...)
+client.Head(path, headers, callback, timeout...)
+client.Options(path, headers, callback, timeout...)
+client.Call(method, path, headers, body, callback, timeout...)
+```
+
+## Callback Signature
+
+```go
+func(statusCode int, responseHeaders http.Header, responseBody []byte)
+```
+
+## Complete Example
+
+```go
+type MyConfig struct {
+    client      wrapper.HttpClient
+    requestPath string
+    tokenHeader string
+}
+
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    config.tokenHeader = json.Get("tokenHeader").String()
+    if config.tokenHeader == "" {
+        return errors.New("missing tokenHeader")
+    }
+    
+    config.requestPath = json.Get("requestPath").String()
+    if config.requestPath == "" {
+        return errors.New("missing requestPath")
+    }
+    
+    serviceName := json.Get("serviceName").String()
+    servicePort := json.Get("servicePort").Int()
+    if servicePort == 0 {
+        if strings.HasSuffix(serviceName, ".static") {
+            servicePort = 80
+        }
+    }
+    
+    config.client = wrapper.NewClusterClient(wrapper.FQDNCluster{
+        FQDN: serviceName,
+        Port: servicePort,
+    })
+    return nil
+}
+
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    err := config.client.Get(config.requestPath, nil,
+        func(statusCode int, responseHeaders http.Header, responseBody []byte) {
+            if statusCode != http.StatusOK {
+                log.Errorf("http call failed, status: %d", statusCode)
+                proxywasm.SendHttpResponse(http.StatusInternalServerError, nil,
+                    []byte("http call failed"), -1)
+                return
+            }
+            
+            token := responseHeaders.Get(config.tokenHeader)
+            if token != "" {
+                proxywasm.AddHttpRequestHeader(config.tokenHeader, token)
+            }
+            proxywasm.ResumeHttpRequest()
+        })
+
+    if err != nil {
+        log.Errorf("http call dispatch failed: %v", err)
+        return types.HeaderContinue
+    }
+    return types.HeaderStopAllIterationAndWatermark
+}
+```
+
+## Important Notes
+
+1. **Cannot use net/http** - Must use wrapper's HTTP client
+2. **Default timeout is 500ms** - Pass explicit timeout for longer calls
+3. **Callback is async** - Must return `HeaderStopAllIterationAndWatermark` and call `ResumeHttpRequest()` in callback
+4. **Error handling** - If dispatch fails, return `HeaderContinue` to avoid blocking

.claude/skills/higress-wasm-go-plugin/references/local-testing.md

@@ -0,0 +1,189 @@
+# Local Testing with Docker Compose
+
+## Prerequisites
+
+- Docker installed
+- Compiled `main.wasm` file
+
+## Setup
+
+Create these files in your plugin directory:
+
+### docker-compose.yaml
+
+```yaml
+version: '3.7'
+services:
+  envoy:
+    image: higress-registry.cn-hangzhou.cr.aliyuncs.com/higress/gateway:v2.1.5
+    entrypoint: /usr/local/bin/envoy
+    command: -c /etc/envoy/envoy.yaml --component-log-level wasm:debug
+    depends_on:
+      - httpbin
+    networks:
+      - wasmtest
+    ports:
+      - "10000:10000"
+    volumes:
+      - ./envoy.yaml:/etc/envoy/envoy.yaml
+      - ./main.wasm:/etc/envoy/main.wasm
+
+  httpbin:
+    image: kennethreitz/httpbin:latest
+    networks:
+      - wasmtest
+    ports:
+      - "12345:80"
+
+networks:
+  wasmtest: {}
+```
+
+### envoy.yaml
+
+```yaml
+admin:
+  address:
+    socket_address:
+      protocol: TCP
+      address: 0.0.0.0
+      port_value: 9901
+
+static_resources:
+  listeners:
+    - name: listener_0
+      address:
+        socket_address:
+          protocol: TCP
+          address: 0.0.0.0
+          port_value: 10000
+      filter_chains:
+        - filters:
+            - name: envoy.filters.network.http_connection_manager
+              typed_config:
+                "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
+                scheme_header_transformation:
+                  scheme_to_overwrite: https
+                stat_prefix: ingress_http
+                route_config:
+                  name: local_route
+                  virtual_hosts:
+                    - name: local_service
+                      domains: ["*"]
+                      routes:
+                        - match:
+                            prefix: "/"
+                          route:
+                            cluster: httpbin
+                http_filters:
+                  - name: wasmdemo
+                    typed_config:
+                      "@type": type.googleapis.com/udpa.type.v1.TypedStruct
+                      type_url: type.googleapis.com/envoy.extensions.filters.http.wasm.v3.Wasm
+                      value:
+                        config:
+                          name: wasmdemo
+                          vm_config:
+                            runtime: envoy.wasm.runtime.v8
+                            code:
+                              local:
+                                filename: /etc/envoy/main.wasm
+                          configuration:
+                            "@type": "type.googleapis.com/google.protobuf.StringValue"
+                            value: |
+                              {
+                                "mockEnable": false
+                              }
+                  - name: envoy.filters.http.router
+                    typed_config:
+                      "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
+
+  clusters:
+    - name: httpbin
+      connect_timeout: 30s
+      type: LOGICAL_DNS
+      dns_lookup_family: V4_ONLY
+      lb_policy: ROUND_ROBIN
+      load_assignment:
+        cluster_name: httpbin
+        endpoints:
+          - lb_endpoints:
+              - endpoint:
+                  address:
+                    socket_address:
+                      address: httpbin
+                      port_value: 80
+```
+
+## Running
+
+```bash
+# Start
+docker compose up
+
+# Test without gateway (baseline)
+curl http://127.0.0.1:12345/get
+
+# Test with gateway (plugin applied)
+curl http://127.0.0.1:10000/get
+
+# Stop
+docker compose down
+```
+
+## Modifying Plugin Config
+
+1. Edit the `configuration.value` section in `envoy.yaml`
+2. Restart: `docker compose restart envoy`
+
+## Viewing Logs
+
+```bash
+# Follow Envoy logs
+docker compose logs -f envoy
+
+# WASM debug logs (enabled by --component-log-level wasm:debug)
+```
+
+## Adding External Services
+
+To test external HTTP/Redis calls, add services to docker-compose.yaml:
+
+```yaml
+services:
+  # ... existing services ...
+  
+  redis:
+    image: redis:7-alpine
+    networks:
+      - wasmtest
+    ports:
+      - "6379:6379"
+
+  auth-service:
+    image: your-auth-service:latest
+    networks:
+      - wasmtest
+```
+
+Then add clusters to envoy.yaml:
+
+```yaml
+clusters:
+  # ... existing clusters ...
+  
+  - name: outbound|6379||redis.static
+    connect_timeout: 5s
+    type: LOGICAL_DNS
+    dns_lookup_family: V4_ONLY
+    lb_policy: ROUND_ROBIN
+    load_assignment:
+      cluster_name: redis
+      endpoints:
+        - lb_endpoints:
+            - endpoint:
+                address:
+                  socket_address:
+                    address: redis
+                    port_value: 6379
+```

.claude/skills/higress-wasm-go-plugin/references/redis-client.md

@@ -0,0 +1,215 @@
+# Redis Client Reference
+
+## Initialization
+
+```go
+type MyConfig struct {
+    redis wrapper.RedisClient
+    qpm   int
+}
+
+func parseConfig(json gjson.Result, config *MyConfig) error {
+    serviceName := json.Get("serviceName").String()
+    servicePort := json.Get("servicePort").Int()
+    if servicePort == 0 {
+        servicePort = 6379
+    }
+    
+    config.redis = wrapper.NewRedisClusterClient(wrapper.FQDNCluster{
+        FQDN: serviceName,
+        Port: servicePort,
+    })
+    
+    return config.redis.Init(
+        json.Get("username").String(),
+        json.Get("password").String(),
+        json.Get("timeout").Int(), // milliseconds
+        // Optional settings:
+        // wrapper.WithDataBase(1),
+        // wrapper.WithBufferFlushTimeout(3*time.Millisecond),
+        // wrapper.WithMaxBufferSizeBeforeFlush(1024),
+        // wrapper.WithDisableBuffer(), // For latency-sensitive scenarios
+    )
+}
+```
+
+## Callback Signature
+
+```go
+func(response resp.Value)
+
+// Check for errors
+if response.Error() != nil {
+    // Handle error
+}
+
+// Get values
+response.Integer()   // int
+response.String()    // string
+response.Bool()      // bool
+response.Array()     // []resp.Value
+response.Bytes()     // []byte
+```
+
+## Available Commands
+
+### Key Operations
+
+```go
+redis.Del(key, callback)
+redis.Exists(key, callback)
+redis.Expire(key, ttlSeconds, callback)
+redis.Persist(key, callback)
+```
+
+### String Operations
+
+```go
+redis.Get(key, callback)
+redis.Set(key, value, callback)
+redis.SetEx(key, value, ttlSeconds, callback)
+redis.SetNX(key, value, ttlSeconds, callback)  // ttl=0 means no expiry
+redis.MGet(keys, callback)
+redis.MSet(kvMap, callback)
+redis.Incr(key, callback)
+redis.Decr(key, callback)
+redis.IncrBy(key, delta, callback)
+redis.DecrBy(key, delta, callback)
+```
+
+### List Operations
+
+```go
+redis.LLen(key, callback)
+redis.RPush(key, values, callback)
+redis.RPop(key, callback)
+redis.LPush(key, values, callback)
+redis.LPop(key, callback)
+redis.LIndex(key, index, callback)
+redis.LRange(key, start, stop, callback)
+redis.LRem(key, count, value, callback)
+redis.LInsertBefore(key, pivot, value, callback)
+redis.LInsertAfter(key, pivot, value, callback)
+```
+
+### Hash Operations
+
+```go
+redis.HExists(key, field, callback)
+redis.HDel(key, fields, callback)
+redis.HLen(key, callback)
+redis.HGet(key, field, callback)
+redis.HSet(key, field, value, callback)
+redis.HMGet(key, fields, callback)
+redis.HMSet(key, kvMap, callback)
+redis.HKeys(key, callback)
+redis.HVals(key, callback)
+redis.HGetAll(key, callback)
+redis.HIncrBy(key, field, delta, callback)
+redis.HIncrByFloat(key, field, delta, callback)
+```
+
+### Set Operations
+
+```go
+redis.SCard(key, callback)
+redis.SAdd(key, values, callback)
+redis.SRem(key, values, callback)
+redis.SIsMember(key, value, callback)
+redis.SMembers(key, callback)
+redis.SDiff(key1, key2, callback)
+redis.SDiffStore(dest, key1, key2, callback)
+redis.SInter(key1, key2, callback)
+redis.SInterStore(dest, key1, key2, callback)
+redis.SUnion(key1, key2, callback)
+redis.SUnionStore(dest, key1, key2, callback)
+```
+
+### Sorted Set Operations
+
+```go
+redis.ZCard(key, callback)
+redis.ZAdd(key, memberScoreMap, callback)
+redis.ZCount(key, min, max, callback)
+redis.ZIncrBy(key, member, delta, callback)
+redis.ZScore(key, member, callback)
+redis.ZRank(key, member, callback)
+redis.ZRevRank(key, member, callback)
+redis.ZRem(key, members, callback)
+redis.ZRange(key, start, stop, callback)
+redis.ZRevRange(key, start, stop, callback)
+```
+
+### Lua Script
+
+```go
+redis.Eval(script, numkeys, keys, args, callback)
+```
+
+### Raw Command
+
+```go
+redis.Command([]interface{}{"SET", "key", "value"}, callback)
+```
+
+## Rate Limiting Example
+
+```go
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    now := time.Now()
+    minuteAligned := now.Truncate(time.Minute)
+    timeStamp := strconv.FormatInt(minuteAligned.Unix(), 10)
+    
+    err := config.redis.Incr(timeStamp, func(response resp.Value) {
+        if response.Error() != nil {
+            log.Errorf("redis error: %v", response.Error())
+            proxywasm.ResumeHttpRequest()
+            return
+        }
+        
+        count := response.Integer()
+        ctx.SetContext("timeStamp", timeStamp)
+        ctx.SetContext("callTimeLeft", strconv.Itoa(config.qpm - count))
+        
+        if count == 1 {
+            // First request in this minute, set expiry
+            config.redis.Expire(timeStamp, 60, func(response resp.Value) {
+                if response.Error() != nil {
+                    log.Errorf("expire error: %v", response.Error())
+                }
+                proxywasm.ResumeHttpRequest()
+            })
+        } else if count > config.qpm {
+            proxywasm.SendHttpResponse(429, [][2]string{
+                {"timeStamp", timeStamp},
+                {"callTimeLeft", "0"},
+            }, []byte("Too many requests\n"), -1)
+        } else {
+            proxywasm.ResumeHttpRequest()
+        }
+    })
+    
+    if err != nil {
+        log.Errorf("redis call failed: %v", err)
+        return types.HeaderContinue
+    }
+    return types.HeaderStopAllIterationAndWatermark
+}
+
+func onHttpResponseHeaders(ctx wrapper.HttpContext, config MyConfig) types.Action {
+    if ts := ctx.GetContext("timeStamp"); ts != nil {
+        proxywasm.AddHttpResponseHeader("timeStamp", ts.(string))
+    }
+    if left := ctx.GetContext("callTimeLeft"); left != nil {
+        proxywasm.AddHttpResponseHeader("callTimeLeft", left.(string))
+    }
+    return types.HeaderContinue
+}
+```
+
+## Important Notes
+
+1. **Check Ready()** - `redis.Ready()` returns false if init failed
+2. **Auto-reconnect** - Client handles NOAUTH errors and re-authenticates automatically
+3. **Buffering** - Default 3ms flush timeout and 1024 byte buffer; use `WithDisableBuffer()` for latency-sensitive scenarios
+4. **Error handling** - Always check `response.Error()` in callbacks

.licenserc.yaml

@@ -36,6 +36,7 @@ header:
     - 'pkg/ingress/kube/gateway/istio/testdata'
     - 'release-notes/**'
     - '.cursor/**'
+    - '.claude/**'    
 
   comment: on-failure
 dependency: