From 78baf6e38a59edf77bc30c6e0691c19d4a62eaed Mon Sep 17 00:00:00 2001
From: Tamish Mhatre <tamishmhatre123@gmail.com>
Date: Mon, 13 Jul 2026 11:48:42 +0530
Subject: [PATCH 1/4] docs: add llms.txt for AI-assisted development

---
 llms.txt | 235 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 235 insertions(+)
 create mode 100644 llms.txt

diff --git a/llms.txt b/llms.txt
new file mode 100644
index 000000000..38836e86b
--- /dev/null
+++ b/llms.txt
@@ -0,0 +1,235 @@
+# Echo
+
+> Echo is a high performance, extensible, minimalist Go web framework built on the standard `net/http` library. The current release line is **v5**, which introduces major breaking changes from v4. Echo adds a fast radix-tree router, request binding with pluggable validator, a deep middleware ecosystem, centralized error handling, and template rendering on top of the standard library.
+
+Key facts for LLMs:
+- Import path is `github.com/labstack/echo/v5` (NOT `github.com/labstack/echo` which is v4)
+- Handlers use `*echo.Context` (pointer to struct), NOT `echo.Context` (interface) like v4
+- `Context` is a concrete struct in v5, not an interface
+- Logging uses `log/slog`, not the old custom `Logger` interface
+- Go 1.25+ required
+
+## Quick Reference
+
+- [Echo v5 API Changes](https://github.com/labstack/echo/blob/master/API_CHANGES_V5.md): Complete v4-to-v5 migration guide with all breaking changes
+- [Echo Official Docs](https://echo.labstack.com): Human-readable documentation site
+- [pkg.go.dev](https://pkg.go.dev/github.com/labstack/echo/v5): API reference on Go package discovery
+
+## Core Patterns (v5)
+
+### Server setup
+
+```go
+package main
+
+import (
+    "log/slog"
+    "net/http"
+
+    "github.com/labstack/echo/v5"
+    "github.com/labstack/echo/v5/middleware"
+)
+
+func hello(c *echo.Context) error {
+    return c.String(http.StatusOK, "Hello, World!")
+}
+
+func main() {
+    e := echo.New()
+    e.Use(middleware.RequestLogger())
+    e.Use(middleware.Recover())
+    e.GET("/", hello)
+    if err := e.Start(":8080"); err != nil {
+        slog.Error("failed to start server", "error", err)
+    }
+}
+```
+
+### Handler signature (v5 vs v4)
+
+```go
+// v5 - pointer to struct
+func handler(c *echo.Context) error {
+    return c.JSON(http.StatusOK, map[string]string{"hello": "world"})
+}
+
+// v4 (DO NOT USE in v5) - interface
+func handler(c echo.Context) error { ... }
+```
+
+### Route registration
+
+```go
+e := echo.New()
+e.GET("/users/:id", getUser)
+e.POST("/users", createUser)
+e.PUT("/users/:id", updateUser)
+e.DELETE("/users/:id", deleteUser)
+
+// Group routes
+g := e.Group("/api/v1")
+g.GET("/posts", listPosts)
+g.POST("/posts", createPost)
+
+// Group with middleware
+admin := e.Group("/admin", middleware.BasicAuth(basicAuthValidator))
+admin.GET("/stats", getStats)
+```
+
+### Generic parameter extraction (v5 new)
+
+```go
+// Type-safe path params
+id, err := echo.PathParam[int](c, "id")
+name, err := echo.PathParam[string](c, "name")
+
+// Query params with defaults
+page, err := echo.QueryParamOr[int](c, "page", 1)
+tags, err := echo.QueryParams[string](c, "tags")
+
+// Form values (renamed from FormParam* in v4)
+val, err := echo.FormValue[string](c, "field")
+val2, err := echo.FormValueOr[string](c, "field", "default")
+
+// Supported types: bool, string, int/int8/.../int64, uint/.../uint64,
+// float32/float64, time.Time, time.Duration
+```
+
+### Request binding
+
+```go
+type User struct {
+    Name  string `json:"name"`
+    Email string `json:"email"`
+}
+
+func createUser(c *echo.Context) error {
+    u := new(User)
+    if err := c.Bind(u); err != nil {
+        return echo.NewHTTPError(http.StatusBadRequest, "invalid request body")
+    }
+    if err := c.Validate(u); err != nil {
+        return err
+    }
+    return c.JSON(http.StatusCreated, u)
+}
+```
+
+### Error handling (v5 changed)
+
+```go
+// v5 - NewHTTPError takes string, not interface{}
+err := echo.NewHTTPError(http.StatusBadRequest, "invalid input")
+
+// v5 - HTTPErrorHandler signature changed (params swapped, pointer)
+e.HTTPErrorHandler = func(c *echo.Context, err error) {
+    // custom error handling
+}
+
+// v5 - DefaultHTTPErrorHandler is now a factory
+e.HTTPErrorHandler = echo.DefaultHTTPErrorHandler(true) // exposeError bool
+```
+
+### Logging (v5 uses slog)
+
+```go
+// v5 - standard library slog
+e.Logger = slog.Default()
+
+// In handlers
+c.Logger().Info("request", "path", c.Path(), "method", c.Request().Method)
+
+// Custom logger
+logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
+e.Logger = logger
+```
+
+### Middleware
+
+```go
+// Built-in middleware
+e.Use(middleware.RequestLogger())
+e.Use(middleware.Recover())
+e.Use(middleware.CORS())
+e.Use(middleware.Gzip())
+e.Use(middleware.BasicAuth(func(c *echo.Context, username, password string) (bool, error) {
+    return username == "admin" && password == "secret", nil
+}))
+e.Use(middleware.RateLimiter(middleware.NewRateLimiterMemoryStore(20)))
+
+// Route-level middleware
+e.GET("/sensitive", handler, middleware.RequestID(), middleware.Logger())
+```
+
+### Response helpers
+
+```go
+c.String(http.StatusOK, "text")
+c.JSON(http.StatusOK, data)
+c.JSONPretty(http.StatusOK, data, "  ")
+c.XML(http.StatusOK, data)
+c.Blob(http.StatusOK, "image/png", bytes)
+c.Stream(http.StatusOK, "text/event-stream", reader)
+c.File("path/to/file")
+c.FileFS("file.txt", filesystem)
+c.Attachment("path/to/file", "download.txt")
+c.Redirect(http.StatusFound, "/new-path")
+c.NoContent(http.StatusOK)
+c.HTML(http.StatusOK, "<h1>Hello</h1>")
+```
+
+### Static files
+
+```go
+e.Static("/assets", "public")
+e.StaticFS("/static", filesystem)
+e.File("/robots.txt", "robots.txt")
+e.FileFS("file.txt", filesystem)
+```
+
+### Context store (v5 type-safe)
+
+```go
+// Set and get values on context
+c.Set("user", user)
+val, err := echo.ContextGet[*User](c, "user")
+count, err := echo.ContextGetOr[int](c, "count", 0)
+```
+
+### Graceful shutdown with StartConfig (v5 new)
+
+```go
+ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+defer cancel()
+
+sc := echo.StartConfig{
+    Address:        ":8080",
+    GracefulTimeout: 10 * time.Second,
+}
+if err := sc.Start(ctx, e); err != nil {
+    log.Fatal(err)
+}
+```
+
+## v4 to v5 Migration Checklist
+
+1. Change import from `github.com/labstack/echo` to `github.com/labstack/echo/v5`
+2. Change all handler signatures from `echo.Context` to `*echo.Context`
+3. Replace custom `Logger` interface with `log/slog`
+4. Update `HTTPErrorHandler` signature: `func(c *echo.Context, err error)` (params swapped)
+5. `NewHTTPError(code int, message string)` - message is now `string` not `interface{}`
+6. `FormParam*` renamed to `FormValue*`
+7. `PathParamsBinder` renamed to `PathValuesBinder`
+8. `Context.Response()` returns `http.ResponseWriter` instead of `*Response`
+9. `ParamNames()`/`ParamValues()` replaced by `PathValues()`
+10. Use `StartConfig` for server configuration instead of `Echo` struct fields
+11. Route methods return `RouteInfo` instead of `*Route`
+12. `Map` type removed - use `map[string]any` directly
+13. HTTP method constants removed - use `http.MethodGet`, `http.MethodPost`, etc.
+14. `BindPathParams` renamed to `BindPathValues`
+
+## Optional
+
+- [Echo GitHub Discussions](https://github.com/labstack/echo/discussions): Community Q&A and proposals
+- [Echo Roadmap](https://github.com/labstack/echo/blob/master/ROADMAP.md): Future plans
+- [Echo Changelog](https://github.com/labstack/echo/blob/master/CHANGELOG.md): Release history

From dd67433c8ba3a662da76418b060302ca4879c50f Mon Sep 17 00:00:00 2001
From: Tamish Mhatre <tamishmhatre123@gmail.com>
Date: Mon, 13 Jul 2026 11:48:43 +0530
Subject: [PATCH 2/4] docs: add llms-full.txt with complete v5 API reference

---
 llms-full.txt | 412 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 412 insertions(+)
 create mode 100644 llms-full.txt

diff --git a/llms-full.txt b/llms-full.txt
new file mode 100644
index 000000000..a0ac51e27
--- /dev/null
+++ b/llms-full.txt
@@ -0,0 +1,412 @@
+# Echo
+
+> Echo is a high performance, extensible, minimalist Go web framework built on the standard `net/http` library. The current release line is **v5**, which introduces major breaking changes from v4. Echo adds a fast radix-tree router, request binding with pluggable validator, a deep middleware ecosystem, centralized error handling, and template rendering on top of the standard library.
+
+Import path: `github.com/labstack/echo/v5`
+Go version: 1.25+
+Handler signature: `func(c *echo.Context) error`
+
+## Critical v5 Breaking Changes
+
+### 1. Context: interface to struct
+
+v4: `type Context interface` with handler `func(c echo.Context) error`
+v5: `type Context struct` with handler `func(c *echo.Context) error`
+
+ALL handlers must use `*echo.Context` (pointer). The `Context` type is no longer an interface.
+
+### 2. Logger: custom interface to slog
+
+v4: `e.Logger` is a custom `Logger` interface with `Print`, `Debug`, `Info`, etc.
+v5: `e.Logger` is `*slog.Logger` from the standard library `log/slog` package.
+
+```go
+e.Logger = slog.Default()
+c.Logger().Info("message", "key", "value")
+```
+
+### 3. HTTPErrorHandler: parameters swapped
+
+v4: `type HTTPErrorHandler func(err error, c Context)`
+v5: `type HTTPErrorHandler func(c *Context, err error)`
+
+`DefaultHTTPErrorHandler` is now a factory: `echo.DefaultHTTPErrorHandler(exposeError bool) HTTPErrorHandler`
+
+### 4. HTTPError: message is string
+
+v4: `NewHTTPError(code int, message ...interface{})` - message is `interface{}`
+v5: `NewHTTPError(code int, message string)` - message is `string`
+
+Added `HTTPError.Wrap(err error)` and `HTTPError.StatusCode()` methods.
+
+### 5. Router: interface introduced
+
+v4: `func NewRouter(e *Echo) *Router` / `func (e *Echo) Router() *Router`
+v5: `func NewRouter(config RouterConfig) *DefaultRouter` / `func (e *Echo) Router() Router` (returns interface)
+
+New `Router` interface with `DefaultRouter` implementation. `NewConcurrentRouter(r Router) Router` for thread-safe routing.
+
+### 6. Route return types
+
+v4: `e.GET(...)` returns `*Route`, `e.Any(...)` returns `[]*Route`, `e.Routes()` returns `[]*Route`
+v5: `e.GET(...)` returns `RouteInfo`, `e.Any(...)` returns `RouteInfo`, new `Routes` type (`[]RouteInfo`) with filtering methods
+
+```go
+type RouteInfo struct {
+    Name       string
+    Method     string
+    Path       string
+    Parameters []string
+}
+```
+
+`Routes` has `FilterByMethod`, `FilterByName`, `FilterByPath`, `FindByMethodPath`, `Reverse` methods.
+
+### 7. Response type
+
+v4: `c.Response()` returns `*Response`
+v5: `c.Response()` returns `http.ResponseWriter`
+
+`Response` struct now embeds `http.ResponseWriter`. `NewResponse` takes `*slog.Logger` instead of `*Echo`.
+
+### 8. FormParam renamed to FormValue
+
+v4: `echo.FormParam[T](c Context, key string, ...)` / `FormParamOr` / `FormParams` / `FormParamsOr`
+v5: `echo.FormValue[T](c *Context, key string, ...)` / `FormValueOr` / `FormValues` / `FormValuesOr`
+
+### 9. Removed from Echo struct
+
+`StdLogger`, `Server`, `TLSServer`, `Listener`, `TLSListener`, `AutoTLSManager`, `ListenerNetwork`, `DisableHTTP2`, `Debug`, `HideBanner`, `HidePort` are all removed. Use `StartConfig` for server configuration.
+
+### 10. PathParams -> PathValues
+
+v4: `ParamNames()`, `ParamValues()`, `SetParamNames()`, `SetParamValues()`
+v5: `PathValues()` returns `PathValues` type (`[]PathValue`), `SetPathValues(PathValues)`
+
+### 11. Other renames
+
+- `PathParamsBinder` -> `PathValuesBinder`
+- `BindPathParams` -> `BindPathValues`
+- `Map` type removed (use `map[string]any`)
+- HTTP method constants removed (use `http.MethodGet`, etc.)
+- `GetPath(r *http.Request)` removed (use `r.URL.Path`)
+
+## Echo struct (v5)
+
+```go
+type Echo struct {
+    Binder           Binder
+    Filesystem       fs.FS
+    Renderer         Renderer
+    Validator        Validator
+    JSONSerializer   JSONSerializer
+    IPExtractor      IPExtractor
+    OnAddRoute       func(route Route) error
+    HTTPErrorHandler HTTPErrorHandler
+    Logger           *slog.Logger
+}
+```
+
+Constructor: `echo.New() *Echo` or `echo.NewWithConfig(config Config) *Echo`
+
+## Echo methods
+
+### Routing
+
+```go
+e.GET(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.POST(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.PUT(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.DELETE(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.PATCH(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.HEAD(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.OPTIONS(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.ANY(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.Match(methods []string, path string, handler HandlerFunc, middleware ...MiddlewareFunc) Routes
+e.RouteNotFound(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+e.AddRoute(route Route) (RouteInfo, error)
+```
+
+### Middleware
+
+```go
+e.Use(middleware ...MiddlewareFunc)
+e.Pre(middleware ...MiddlewareFunc)
+e.Middlewares() []MiddlewareFunc
+e.PreMiddlewares() []MiddlewareFunc
+```
+
+### Groups
+
+```go
+e.Group(prefix string, m ...MiddlewareFunc) *Group
+```
+
+### Static files
+
+```go
+e.Static(pathPrefix, fsRoot string, m ...MiddlewareFunc) RouteInfo
+e.StaticFS(pathPrefix string, filesystem fs.FS, m ...MiddlewareFunc) RouteInfo
+e.File(path, file string, m ...MiddlewareFunc) RouteInfo
+e.FileFS(file string, filesystem fs.FS, m ...MiddlewareFunc) RouteInfo
+```
+
+### Server
+
+```go
+e.Start(address string) error
+e.StartTLS(address string, certFile, keyFile any) error
+// v5 also: StartConfig.Start(ctx, handler) and StartConfig.StartTLS(ctx, handler, certFile, keyFile)
+```
+
+```go
+type StartConfig struct {
+    Address          string
+    HideBanner       bool
+    HidePort         bool
+    CertFilesystem   fs.FS
+    TLSConfig        *tls.Config
+    ListenerNetwork  string
+    ListenerAddrFunc func(addr net.Addr)
+    GracefulTimeout  time.Duration
+    OnShutdownError  func(err error)
+    BeforeServeFunc  func(s *http.Server) error
+}
+```
+
+### Context methods (v5)
+
+```go
+c.Request() *http.Request
+c.SetRequest(r *http.Request)
+c.Response() http.ResponseWriter
+c.SetResponse(rw http.ResponseWriter)
+c.IsTLS() bool
+c.IsWebSocket() bool
+c.Scheme() string
+c.RealIP() string
+c.Path() string
+c.SetPath(path string)
+c.RouteInfo() RouteInfo
+c.Param(name string) string
+c.ParamOr(name, defaultValue string) string
+c.PathValues() PathValues
+c.SetPathValues(pathValues PathValues)
+c.QueryParam(name string) string
+c.QueryParamOr(name, defaultValue string) string
+c.QueryParams() []string
+c.QueryString() string
+c.FormValue(name string) string
+c.FormValueOr(name, defaultValue string) string
+c.FormValues() []string
+c.FormFile(name string) (*multipart.FileHeader, error)
+c.MultipartForm() (*multipart.Form, error)
+c.Cookie(name string) (*http.Cookie, error)
+c.SetCookie(cookie *http.Cookie)
+c.Cookies() []*http.Cookie
+c.Get(key string) any
+c.Set(key string, val any)
+c.Bind(i any) error
+c.Validate(i any) error
+c.Render(code int, name string, data any) error
+c.HTML(code int, html string) error
+c.HTMLBlob(code int, b []byte) error
+c.String(code int, s string) error
+c.JSON(code int, i any) error
+c.JSONPretty(code int, i any, indent string) error
+c.JSONBlob(code int, b []byte) error
+c.JSONP(code int, callback string, i any) error
+c.JSONPBlob(code int, callback string, i any) error
+c.XML(code int, i any) error
+c.XMLPretty(code int, i any, indent string) error
+c.XMLBlob(code int, b []byte) error
+c.Blob(code int, contentType string, b []byte) error
+c.Stream(code int, contentType string, r io.Reader) error
+c.File(file string) error
+c.FileFS(file string, filesystem fs.FS) error
+c.Attachment(file, name string) error
+c.Inline(file, name string) error
+c.NoContent(code int) error
+c.Redirect(code int, url string) error
+c.Logger() *slog.Logger
+c.SetLogger(logger *slog.Logger)
+c.Echo() *Echo
+```
+
+### Generic helper functions (v5)
+
+```go
+echo.PathParam[T](c *Context, name string, opts ...any) (T, error)
+echo.PathParamOr[T](c *Context, name string, defaultValue T, opts ...any) (T, error)
+echo.QueryParam[T](c *Context, key string, opts ...any) (T, error)
+echo.QueryParamOr[T](c *Context, key string, defaultValue T, opts ...any) (T, error)
+echo.QueryParams[T](c *Context, key string, opts ...any) ([]T, error)
+echo.QueryParamsOr[T](c *Context, key string, defaultValue []T, opts ...any) ([]T, error)
+echo.FormValue[T](c *Context, key string, opts ...any) (T, error)
+echo.FormValueOr[T](c *Context, key string, defaultValue T, opts ...any) (T, error)
+echo.FormValues[T](c *Context, key string, opts ...any) ([]T, error)
+echo.FormValuesOr[T](c *Context, key string, defaultValue []T, opts ...any) ([]T, error)
+echo.ParseValue[T](value string, opts ...any) (T, error)
+echo.ParseValueOr[T](value string, defaultValue T, opts ...any) (T, error)
+echo.ParseValues[T](values []string, opts ...any) ([]T, error)
+echo.ParseValuesOr[T](values []string, defaultValue []T, opts ...any) ([]T, error)
+echo.ContextGet[T](c *Context, key string) (T, error)
+echo.ContextGetOr[T](c *Context, key string, defaultValue T) (T, error)
+```
+
+Supported generic types: bool, string, int/int8/int16/int32/int64, uint/uint8/uint16/uint32/uint64, float32/float64, time.Time, time.Duration, BindUnmarshaler, encoding.TextUnmarshaler, json.Unmarshaler
+
+### Binding functions (v5)
+
+```go
+echo.BindBody(c *Context, target any) error
+echo.BindHeaders(c *Context, target any) error
+echo.BindPathValues(c *Context, target any) error
+echo.BindQueryParams(c *Context, target any) error
+```
+
+### Binder helpers (v5)
+
+```go
+echo.PathValuesBinder(c *Context) *ValueBinder
+echo.QueryParamsBinder(c *Context) *ValueBinder
+echo.FormFieldBinder(c *Context) *ValueBinder
+```
+
+### Wrapping stdlib handlers
+
+```go
+echo.WrapHandler(h http.Handler) HandlerFunc
+echo.WrapMiddleware(m func(http.Handler) http.Handler) MiddlewareFunc
+```
+
+## Group methods
+
+```go
+g.Use(m ...MiddlewareFunc)
+g.Group(prefix string, m ...MiddlewareFunc) *Group
+g.GET(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+g.POST(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+g.PUT(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+g.DELETE(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+g.PATCH(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+g.ANY(path string, h HandlerFunc, m ...MiddlewareFunc) RouteInfo
+g.Match(methods []string, path string, handler HandlerFunc, middleware ...MiddlewareFunc) Routes
+g.Static(pathPrefix, fsRoot string, m ...MiddlewareFunc) RouteInfo
+g.StaticFS(pathPrefix string, filesystem fs.FS, m ...MiddlewareFunc) RouteInfo
+g.File(path, file string, m ...MiddlewareFunc) RouteInfo
+g.FileFS(file string, filesystem fs.FS, m ...MiddlewareFunc) RouteInfo
+```
+
+## Built-in middleware
+
+| Middleware | Description |
+|---|---|
+| BasicAuth | HTTP basic authentication |
+| BodyDump | Dumps request and response bodies |
+| BodyLimit | Limits request body size |
+| Compress | Gzip response compression |
+| ContextTimeout | Request context timeout |
+| CORS | Cross-origin resource sharing |
+| CSRF | Cross-site request forgery protection |
+| Decompress | Gzip request decompression |
+| KeyAuth | Key-based authentication |
+| MethodOverride | HTTP method override |
+| Proxy | Reverse proxy |
+| RateLimiter | Rate limiting |
+| Recover | Panic recovery |
+| Redirect | HTTP redirect |
+| RequestID | Request ID header |
+| RequestLogger | Structured request logging |
+| Rewrite | URL rewriting |
+| Secure | Security headers |
+| Slash | Trailing slash handling |
+| Static | Static file serving |
+
+## PathValues type (v5)
+
+```go
+type PathValue struct {
+    Name  string
+    Value string
+}
+type PathValues []PathValue
+
+func (p PathValues) Get(name string) (string, bool)
+func (p PathValues) GetOr(name string, defaultValue string) string
+```
+
+## echotest package (v5 new)
+
+```go
+import "github.com/labstack/echo/v5/echotest"
+
+echotest.LoadBytes(t *testing.T, name string, opts ...loadBytesOpts) []byte
+echotest.TrimNewlineEnd(bytes []byte) []byte
+echotest.ContextConfig{...}
+echotest.MultipartForm{...}
+echotest.MultipartFormFile{...}
+```
+
+## Error variables (v5)
+
+```go
+echo.ErrBadRequest
+echo.ErrValidatorNotRegistered
+echo.ErrInvalidKeyType
+echo.ErrNonExistentKey
+```
+
+## Virtual host (v5 new)
+
+```go
+echo.NewVirtualHostHandler(vhosts map[string]*Echo) *Echo
+```
+
+## Complete server example with graceful shutdown
+
+```go
+package main
+
+import (
+    "context"
+    "log/slog"
+    "net/http"
+    "os"
+    "os/signal"
+    "syscall"
+    "time"
+
+    "github.com/labstack/echo/v5"
+    "github.com/labstack/echo/v5/middleware"
+)
+
+func main() {
+    e := echo.New()
+    e.Use(middleware.RequestLogger())
+    e.Use(middleware.Recover())
+
+    e.GET("/", func(c *echo.Context) error {
+        return c.String(http.StatusOK, "Hello, World!")
+    })
+
+    e.GET("/users/:id", func(c *echo.Context) error {
+        id, err := echo.PathParam[int](c, "id")
+        if err != nil {
+            return echo.NewHTTPError(http.StatusBadRequest, "invalid user id")
+        }
+        return c.JSON(http.StatusOK, map[string]int{"id": id})
+    })
+
+    ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+    defer cancel()
+
+    sc := echo.StartConfig{
+        Address:        ":8080",
+        GracefulTimeout: 10 * time.Second,
+    }
+    if err := sc.Start(ctx, e); err != nil {
+        slog.Error("server error", "error", err)
+    }
+}
+```

From 42dcc597ab589a98a63c89d7a28ec9b29b667232 Mon Sep 17 00:00:00 2001
From: Tamish Mhatre <tamishmhatre123@gmail.com>
Date: Tue, 14 Jul 2026 01:55:00 +0530
Subject: [PATCH 3/4] docs: rework llms.txt to describe v5 without migration
 focus

---
 llms.txt | 60 +++++++++++++++++++-------------------------------------
 1 file changed, 20 insertions(+), 40 deletions(-)

diff --git a/llms.txt b/llms.txt
index 38836e86b..7071adcf8 100644
--- a/llms.txt
+++ b/llms.txt
@@ -1,21 +1,21 @@
 # Echo
 
-> Echo is a high performance, extensible, minimalist Go web framework built on the standard `net/http` library. The current release line is **v5**, which introduces major breaking changes from v4. Echo adds a fast radix-tree router, request binding with pluggable validator, a deep middleware ecosystem, centralized error handling, and template rendering on top of the standard library.
+> Echo is a high performance, extensible, minimalist Go web framework built on the standard `net/http` library. Echo adds a fast radix-tree router, request binding with pluggable validator, a deep middleware ecosystem, centralized error handling, and template rendering on top of the standard library.
 
 Key facts for LLMs:
-- Import path is `github.com/labstack/echo/v5` (NOT `github.com/labstack/echo` which is v4)
-- Handlers use `*echo.Context` (pointer to struct), NOT `echo.Context` (interface) like v4
-- `Context` is a concrete struct in v5, not an interface
-- Logging uses `log/slog`, not the old custom `Logger` interface
+- Import path is `github.com/labstack/echo/v5`
+- Handlers use `*echo.Context` (pointer to struct)
+- `Context` is a concrete struct, not an interface
+- Logging uses `log/slog`
 - Go 1.25+ required
 
 ## Quick Reference
 
-- [Echo v5 API Changes](https://github.com/labstack/echo/blob/master/API_CHANGES_V5.md): Complete v4-to-v5 migration guide with all breaking changes
+- [Echo v5 API Changes](https://github.com/labstack/echo/blob/master/API_CHANGES_V5.md): Breaking changes reference
 - [Echo Official Docs](https://echo.labstack.com): Human-readable documentation site
 - [pkg.go.dev](https://pkg.go.dev/github.com/labstack/echo/v5): API reference on Go package discovery
 
-## Core Patterns (v5)
+## Core Patterns
 
 ### Server setup
 
@@ -45,16 +45,12 @@ func main() {
 }
 ```
 
-### Handler signature (v5 vs v4)
+### Handler signature
 
 ```go
-// v5 - pointer to struct
 func handler(c *echo.Context) error {
     return c.JSON(http.StatusOK, map[string]string{"hello": "world"})
 }
-
-// v4 (DO NOT USE in v5) - interface
-func handler(c echo.Context) error { ... }
 ```
 
 ### Route registration
@@ -76,7 +72,7 @@ admin := e.Group("/admin", middleware.BasicAuth(basicAuthValidator))
 admin.GET("/stats", getStats)
 ```
 
-### Generic parameter extraction (v5 new)
+### Generic parameter extraction
 
 ```go
 // Type-safe path params
@@ -87,7 +83,7 @@ name, err := echo.PathParam[string](c, "name")
 page, err := echo.QueryParamOr[int](c, "page", 1)
 tags, err := echo.QueryParams[string](c, "tags")
 
-// Form values (renamed from FormParam* in v4)
+// Form values
 val, err := echo.FormValue[string](c, "field")
 val2, err := echo.FormValueOr[string](c, "field", "default")
 
@@ -115,25 +111,25 @@ func createUser(c *echo.Context) error {
 }
 ```
 
-### Error handling (v5 changed)
+### Error handling
 
 ```go
-// v5 - NewHTTPError takes string, not interface{}
+// NewHTTPError takes a string message
 err := echo.NewHTTPError(http.StatusBadRequest, "invalid input")
 
-// v5 - HTTPErrorHandler signature changed (params swapped, pointer)
+// Custom error handler
 e.HTTPErrorHandler = func(c *echo.Context, err error) {
     // custom error handling
 }
 
-// v5 - DefaultHTTPErrorHandler is now a factory
-e.HTTPErrorHandler = echo.DefaultHTTPErrorHandler(true) // exposeError bool
+// DefaultHTTPErrorHandler is a factory (exposeError bool)
+e.HTTPErrorHandler = echo.DefaultHTTPErrorHandler(true)
 ```
 
-### Logging (v5 uses slog)
+### Logging
 
 ```go
-// v5 - standard library slog
+// Echo uses the standard library slog
 e.Logger = slog.Default()
 
 // In handlers
@@ -187,7 +183,7 @@ e.File("/robots.txt", "robots.txt")
 e.FileFS("file.txt", filesystem)
 ```
 
-### Context store (v5 type-safe)
+### Context store (type-safe)
 
 ```go
 // Set and get values on context
@@ -196,7 +192,7 @@ val, err := echo.ContextGet[*User](c, "user")
 count, err := echo.ContextGetOr[int](c, "count", 0)
 ```
 
-### Graceful shutdown with StartConfig (v5 new)
+### Graceful shutdown with StartConfig
 
 ```go
 ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
@@ -211,25 +207,9 @@ if err := sc.Start(ctx, e); err != nil {
 }
 ```
 
-## v4 to v5 Migration Checklist
-
-1. Change import from `github.com/labstack/echo` to `github.com/labstack/echo/v5`
-2. Change all handler signatures from `echo.Context` to `*echo.Context`
-3. Replace custom `Logger` interface with `log/slog`
-4. Update `HTTPErrorHandler` signature: `func(c *echo.Context, err error)` (params swapped)
-5. `NewHTTPError(code int, message string)` - message is now `string` not `interface{}`
-6. `FormParam*` renamed to `FormValue*`
-7. `PathParamsBinder` renamed to `PathValuesBinder`
-8. `Context.Response()` returns `http.ResponseWriter` instead of `*Response`
-9. `ParamNames()`/`ParamValues()` replaced by `PathValues()`
-10. Use `StartConfig` for server configuration instead of `Echo` struct fields
-11. Route methods return `RouteInfo` instead of `*Route`
-12. `Map` type removed - use `map[string]any` directly
-13. HTTP method constants removed - use `http.MethodGet`, `http.MethodPost`, etc.
-14. `BindPathParams` renamed to `BindPathValues`
-
 ## Optional
 
 - [Echo GitHub Discussions](https://github.com/labstack/echo/discussions): Community Q&A and proposals
 - [Echo Roadmap](https://github.com/labstack/echo/blob/master/ROADMAP.md): Future plans
 - [Echo Changelog](https://github.com/labstack/echo/blob/master/CHANGELOG.md): Release history
+- [API_CHANGES_V5.md](https://github.com/labstack/echo/blob/master/API_CHANGES_V5.md): Full v5 breaking changes reference

From 08bf230e07c0b28795f286ad82083751eb29c673 Mon Sep 17 00:00:00 2001
From: Tamish Mhatre <tamishmhatre123@gmail.com>
Date: Tue, 14 Jul 2026 01:55:01 +0530
Subject: [PATCH 4/4] docs: rework llms-full.txt to describe v5 api without v4
 comparisons

---
 llms-full.txt | 321 ++++++++++++++++++++++++--------------------------
 1 file changed, 155 insertions(+), 166 deletions(-)

diff --git a/llms-full.txt b/llms-full.txt
index a0ac51e27..b6db08055 100644
--- a/llms-full.txt
+++ b/llms-full.txt
@@ -1,97 +1,90 @@
 # Echo
 
-> Echo is a high performance, extensible, minimalist Go web framework built on the standard `net/http` library. The current release line is **v5**, which introduces major breaking changes from v4. Echo adds a fast radix-tree router, request binding with pluggable validator, a deep middleware ecosystem, centralized error handling, and template rendering on top of the standard library.
+> Echo is a high performance, extensible, minimalist Go web framework built on the standard `net/http` library. Echo adds a fast radix-tree router, request binding with pluggable validator, a deep middleware ecosystem, centralized error handling, and template rendering on top of the standard library.
 
 Import path: `github.com/labstack/echo/v5`
 Go version: 1.25+
 Handler signature: `func(c *echo.Context) error`
 
-## Critical v5 Breaking Changes
+## Context
 
-### 1. Context: interface to struct
+`Context` is a concrete struct passed by pointer to all handlers.
 
-v4: `type Context interface` with handler `func(c echo.Context) error`
-v5: `type Context struct` with handler `func(c *echo.Context) error`
-
-ALL handlers must use `*echo.Context` (pointer). The `Context` type is no longer an interface.
+```go
+type Context struct { ... }
 
-### 2. Logger: custom interface to slog
+// Handlers receive *echo.Context
+func handler(c *echo.Context) error { ... }
+```
 
-v4: `e.Logger` is a custom `Logger` interface with `Print`, `Debug`, `Info`, etc.
-v5: `e.Logger` is `*slog.Logger` from the standard library `log/slog` package.
+### Context methods
 
 ```go
-e.Logger = slog.Default()
-c.Logger().Info("message", "key", "value")
+c.Request() *http.Request
+c.SetRequest(r *http.Request)
+c.Response() http.ResponseWriter
+c.SetResponse(rw http.ResponseWriter)
+c.IsTLS() bool
+c.IsWebSocket() bool
+c.Scheme() string
+c.RealIP() string
+c.Path() string
+c.SetPath(path string)
+c.RouteInfo() RouteInfo
+c.Param(name string) string
+c.ParamOr(name, defaultValue string) string
+c.PathValues() PathValues
+c.SetPathValues(pathValues PathValues)
+c.QueryParam(name string) string
+c.QueryParamOr(name, defaultValue string) string
+c.QueryParams() []string
+c.QueryString() string
+c.FormValue(name string) string
+c.FormValueOr(name, defaultValue string) string
+c.FormValues() []string
+c.FormFile(name string) (*multipart.FileHeader, error)
+c.MultipartForm() (*multipart.Form, error)
+c.Cookie(name string) (*http.Cookie, error)
+c.SetCookie(cookie *http.Cookie)
+c.Cookies() []*http.Cookie
+c.Get(key string) any
+c.Set(key string, val any)
+c.Bind(i any) error
+c.Validate(i any) error
+c.Render(code int, name string, data any) error
+c.HTML(code int, html string) error
+c.HTMLBlob(code int, b []byte) error
+c.String(code int, s string) error
+c.JSON(code int, i any) error
+c.JSONPretty(code int, i any, indent string) error
+c.JSONBlob(code int, b []byte) error
+c.JSONP(code int, callback string, i any) error
+c.JSONPBlob(code int, callback string, i any) error
+c.XML(code int, i any) error
+c.XMLPretty(code int, i any, indent string) error
+c.XMLBlob(code int, b []byte) error
+c.Blob(code int, contentType string, b []byte) error
+c.Stream(code int, contentType string, r io.Reader) error
+c.File(file string) error
+c.FileFS(file string, filesystem fs.FS) error
+c.Attachment(file, name string) error
+c.Inline(file, name string) error
+c.NoContent(code int) error
+c.Redirect(code int, url string) error
+c.Logger() *slog.Logger
+c.SetLogger(logger *slog.Logger)
+c.Echo() *Echo
 ```
 
-### 3. HTTPErrorHandler: parameters swapped
-
-v4: `type HTTPErrorHandler func(err error, c Context)`
-v5: `type HTTPErrorHandler func(c *Context, err error)`
-
-`DefaultHTTPErrorHandler` is now a factory: `echo.DefaultHTTPErrorHandler(exposeError bool) HTTPErrorHandler`
-
-### 4. HTTPError: message is string
-
-v4: `NewHTTPError(code int, message ...interface{})` - message is `interface{}`
-v5: `NewHTTPError(code int, message string)` - message is `string`
-
-Added `HTTPError.Wrap(err error)` and `HTTPError.StatusCode()` methods.
-
-### 5. Router: interface introduced
-
-v4: `func NewRouter(e *Echo) *Router` / `func (e *Echo) Router() *Router`
-v5: `func NewRouter(config RouterConfig) *DefaultRouter` / `func (e *Echo) Router() Router` (returns interface)
-
-New `Router` interface with `DefaultRouter` implementation. `NewConcurrentRouter(r Router) Router` for thread-safe routing.
-
-### 6. Route return types
-
-v4: `e.GET(...)` returns `*Route`, `e.Any(...)` returns `[]*Route`, `e.Routes()` returns `[]*Route`
-v5: `e.GET(...)` returns `RouteInfo`, `e.Any(...)` returns `RouteInfo`, new `Routes` type (`[]RouteInfo`) with filtering methods
+### Context store (type-safe)
 
 ```go
-type RouteInfo struct {
-    Name       string
-    Method     string
-    Path       string
-    Parameters []string
-}
+c.Set("user", user)
+val, err := echo.ContextGet[*User](c, "user")
+count, err := echo.ContextGetOr[int](c, "count", 0)
 ```
 
-`Routes` has `FilterByMethod`, `FilterByName`, `FilterByPath`, `FindByMethodPath`, `Reverse` methods.
-
-### 7. Response type
-
-v4: `c.Response()` returns `*Response`
-v5: `c.Response()` returns `http.ResponseWriter`
-
-`Response` struct now embeds `http.ResponseWriter`. `NewResponse` takes `*slog.Logger` instead of `*Echo`.
-
-### 8. FormParam renamed to FormValue
-
-v4: `echo.FormParam[T](c Context, key string, ...)` / `FormParamOr` / `FormParams` / `FormParamsOr`
-v5: `echo.FormValue[T](c *Context, key string, ...)` / `FormValueOr` / `FormValues` / `FormValuesOr`
-
-### 9. Removed from Echo struct
-
-`StdLogger`, `Server`, `TLSServer`, `Listener`, `TLSListener`, `AutoTLSManager`, `ListenerNetwork`, `DisableHTTP2`, `Debug`, `HideBanner`, `HidePort` are all removed. Use `StartConfig` for server configuration.
-
-### 10. PathParams -> PathValues
-
-v4: `ParamNames()`, `ParamValues()`, `SetParamNames()`, `SetParamValues()`
-v5: `PathValues()` returns `PathValues` type (`[]PathValue`), `SetPathValues(PathValues)`
-
-### 11. Other renames
-
-- `PathParamsBinder` -> `PathValuesBinder`
-- `BindPathParams` -> `BindPathValues`
-- `Map` type removed (use `map[string]any`)
-- HTTP method constants removed (use `http.MethodGet`, etc.)
-- `GetPath(r *http.Request)` removed (use `r.URL.Path`)
-
-## Echo struct (v5)
+## Echo struct
 
 ```go
 type Echo struct {
@@ -156,7 +149,6 @@ e.FileFS(file string, filesystem fs.FS, m ...MiddlewareFunc) RouteInfo
 ```go
 e.Start(address string) error
 e.StartTLS(address string, certFile, keyFile any) error
-// v5 also: StartConfig.Start(ctx, handler) and StartConfig.StartTLS(ctx, handler, certFile, keyFile)
 ```
 
 ```go
@@ -172,68 +164,87 @@ type StartConfig struct {
     OnShutdownError  func(err error)
     BeforeServeFunc  func(s *http.Server) error
 }
+
+// StartConfig.Start and StartConfig.StartTLS for graceful shutdown
+sc := echo.StartConfig{Address: ":8080", GracefulTimeout: 10 * time.Second}
+sc.Start(ctx, e)
 ```
 
-### Context methods (v5)
+## Error handling
 
 ```go
-c.Request() *http.Request
-c.SetRequest(r *http.Request)
-c.Response() http.ResponseWriter
-c.SetResponse(rw http.ResponseWriter)
-c.IsTLS() bool
-c.IsWebSocket() bool
-c.Scheme() string
-c.RealIP() string
-c.Path() string
-c.SetPath(path string)
-c.RouteInfo() RouteInfo
-c.Param(name string) string
-c.ParamOr(name, defaultValue string) string
-c.PathValues() PathValues
-c.SetPathValues(pathValues PathValues)
-c.QueryParam(name string) string
-c.QueryParamOr(name, defaultValue string) string
-c.QueryParams() []string
-c.QueryString() string
-c.FormValue(name string) string
-c.FormValueOr(name, defaultValue string) string
-c.FormValues() []string
-c.FormFile(name string) (*multipart.FileHeader, error)
-c.MultipartForm() (*multipart.Form, error)
-c.Cookie(name string) (*http.Cookie, error)
-c.SetCookie(cookie *http.Cookie)
-c.Cookies() []*http.Cookie
-c.Get(key string) any
-c.Set(key string, val any)
-c.Bind(i any) error
-c.Validate(i any) error
-c.Render(code int, name string, data any) error
-c.HTML(code int, html string) error
-c.HTMLBlob(code int, b []byte) error
-c.String(code int, s string) error
-c.JSON(code int, i any) error
-c.JSONPretty(code int, i any, indent string) error
-c.JSONBlob(code int, b []byte) error
-c.JSONP(code int, callback string, i any) error
-c.JSONPBlob(code int, callback string, i any) error
-c.XML(code int, i any) error
-c.XMLPretty(code int, i any, indent string) error
-c.XMLBlob(code int, b []byte) error
-c.Blob(code int, contentType string, b []byte) error
-c.Stream(code int, contentType string, r io.Reader) error
-c.File(file string) error
-c.FileFS(file string, filesystem fs.FS) error
-c.Attachment(file, name string) error
-c.Inline(file, name string) error
-c.NoContent(code int) error
-c.Redirect(code int, url string) error
-c.Logger() *slog.Logger
-c.SetLogger(logger *slog.Logger)
-c.Echo() *Echo
+// HTTPError with string message
+err := echo.NewHTTPError(http.StatusBadRequest, "invalid input")
+
+// Custom error handler (params: context pointer, then error)
+e.HTTPErrorHandler = func(c *echo.Context, err error) {
+    // custom error handling
+}
+
+// Default error handler factory (exposeError bool)
+e.HTTPErrorHandler = echo.DefaultHTTPErrorHandler(true)
+```
+
+```go
+echo.ErrBadRequest
+echo.ErrValidatorNotRegistered
+echo.ErrInvalidKeyType
+echo.ErrNonExistentKey
+```
+
+## Logging
+
+Echo uses the standard library `log/slog` package.
+
+```go
+e.Logger = slog.Default()
+c.Logger().Info("message", "key", "value")
+
+// Custom logger
+logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
+e.Logger = logger
+```
+
+## Router
+
+```go
+// Router interface with DefaultRouter implementation
+func NewRouter(config RouterConfig) *DefaultRouter
+func (e *Echo) Router() Router
+
+// Thread-safe routing
+func NewConcurrentRouter(r Router) Router
 ```
 
-### Generic helper functions (v5)
+## RouteInfo
+
+```go
+type RouteInfo struct {
+    Name       string
+    Method     string
+    Path       string
+    Parameters []string
+}
+
+// Routes type with filtering methods
+type Routes []RouteInfo
+// Methods: FilterByMethod, FilterByName, FilterByPath, FindByMethodPath, Reverse
+```
+
+## PathValues
+
+```go
+type PathValue struct {
+    Name  string
+    Value string
+}
+type PathValues []PathValue
+
+func (p PathValues) Get(name string) (string, bool)
+func (p PathValues) GetOr(name string, defaultValue string) string
+```
+
+## Generic helper functions
 
 ```go
 echo.PathParam[T](c *Context, name string, opts ...any) (T, error)
@@ -256,7 +267,7 @@ echo.ContextGetOr[T](c *Context, key string, defaultValue T) (T, error)
 
 Supported generic types: bool, string, int/int8/int16/int32/int64, uint/uint8/uint16/uint32/uint64, float32/float64, time.Time, time.Duration, BindUnmarshaler, encoding.TextUnmarshaler, json.Unmarshaler
 
-### Binding functions (v5)
+## Binding functions
 
 ```go
 echo.BindBody(c *Context, target any) error
@@ -265,7 +276,7 @@ echo.BindPathValues(c *Context, target any) error
 echo.BindQueryParams(c *Context, target any) error
 ```
 
-### Binder helpers (v5)
+### Binder helpers
 
 ```go
 echo.PathValuesBinder(c *Context) *ValueBinder
@@ -273,13 +284,6 @@ echo.QueryParamsBinder(c *Context) *ValueBinder
 echo.FormFieldBinder(c *Context) *ValueBinder
 ```
 
-### Wrapping stdlib handlers
-
-```go
-echo.WrapHandler(h http.Handler) HandlerFunc
-echo.WrapMiddleware(m func(http.Handler) http.Handler) MiddlewareFunc
-```
-
 ## Group methods
 
 ```go
@@ -323,20 +327,20 @@ g.FileFS(file string, filesystem fs.FS, m ...MiddlewareFunc) RouteInfo
 | Slash | Trailing slash handling |
 | Static | Static file serving |
 
-## PathValues type (v5)
+## Wrapping stdlib handlers
 
 ```go
-type PathValue struct {
-    Name  string
-    Value string
-}
-type PathValues []PathValue
+echo.WrapHandler(h http.Handler) HandlerFunc
+echo.WrapMiddleware(m func(http.Handler) http.Handler) MiddlewareFunc
+```
 
-func (p PathValues) Get(name string) (string, bool)
-func (p PathValues) GetOr(name string, defaultValue string) string
+## Virtual host
+
+```go
+echo.NewVirtualHostHandler(vhosts map[string]*Echo) *Echo
 ```
 
-## echotest package (v5 new)
+## echotest package
 
 ```go
 import "github.com/labstack/echo/v5/echotest"
@@ -348,22 +352,7 @@ echotest.MultipartForm{...}
 echotest.MultipartFormFile{...}
 ```
 
-## Error variables (v5)
-
-```go
-echo.ErrBadRequest
-echo.ErrValidatorNotRegistered
-echo.ErrInvalidKeyType
-echo.ErrNonExistentKey
-```
-
-## Virtual host (v5 new)
-
-```go
-echo.NewVirtualHostHandler(vhosts map[string]*Echo) *Echo
-```
-
-## Complete server example with graceful shutdown
+## Complete server example
 
 ```go
 package main