google.golang.org/genproto/googleapis/rpc v0.0.0-20260401001100-f93e5f3e9f0f: code.Code_INVALID_ARGUMENT

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f
Demonstrate these symbols/APIs:
  - google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:70af42cad3d193b7e655b5f05b860704bdf57416c8967b224ebfb25babf44a9d","contract":["code.Code_INVALID_ARGUMENT has numeric enum value 3","code.Code_INVALID_ARGUMENT string formatting and lookup tables (Code_name and Code_value) round-trip","status.Status with Code_INVALID_ARGUMENT marshals and unmarshals via protobuf preserving code and message","status.Status with Code_INVALID_ARGUMENT attaches and unpacks errdetails.BadRequest field violations"],"goal":"verify google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f"],"schemaVersion":1,"symbols":["google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f","symbols":["google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.25.0

require (
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260401001100-f93e5f3e9f0f
	google.golang.org/protobuf v1.36.11
)

github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401001100-f93e5f3e9f0f h1:Rka45QInERYknkHYfJEPBQaoobXl+YpxTMjAKgWUq2A=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401001100-f93e5f3e9f0f/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"fmt"
	"log"

	"google.golang.org/genproto/googleapis/rpc/code"
	"google.golang.org/genproto/googleapis/rpc/errdetails"
	"google.golang.org/genproto/googleapis/rpc/status"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/types/known/anypb"
)

func main() {
	badRequest := &errdetails.BadRequest{
		FieldViolations: []*errdetails.BadRequest_FieldViolation{
			{
				Field:       "request_id",
				Description: "request_id must be a non-empty string",
			},
		},
	}
	anyDetail, err := anypb.New(badRequest)
	if err != nil {
		log.Fatalf("failed to pack BadRequest detail: %v", err)
	}

	st := &status.Status{
		Code:    int32(code.Code_INVALID_ARGUMENT),
		Message: "invalid argument in client request",
		Details: []*anypb.Any{anyDetail},
	}

	raw, err := proto.Marshal(st)
	if err != nil {
		log.Fatalf("failed to marshal status: %v", err)
	}

	var roundtrip status.Status
	if err := proto.Unmarshal(raw, &roundtrip); err != nil {
		log.Fatalf("failed to unmarshal status: %v", err)
	}

	fmt.Printf("Code: %d (%s)\n", roundtrip.GetCode(), code.Code(roundtrip.GetCode()).String())
	fmt.Printf("Message: %s\n", roundtrip.GetMessage())
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260401001100-f93e5f3e9f0f"
  ],
  "symbols": [
    "google.golang.org/genproto/googleapis/rpc/code.Code_INVALID_ARGUMENT"
  ]
}

package main

import (
	"fmt"
	"os"

	"google.golang.org/genproto/googleapis/rpc/code"
	"google.golang.org/genproto/googleapis/rpc/errdetails"
	"google.golang.org/genproto/googleapis/rpc/status"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/types/known/anypb"
)

func assert(cond bool, msg string) {
	if !cond {
		fmt.Fprintf(os.Stderr, "contract failure: %s\n", msg)
		os.Exit(1)
	}
}

func main() {
	// 1. code.Code_INVALID_ARGUMENT has numeric enum value 3
	assert(code.Code_INVALID_ARGUMENT == 3, "Code_INVALID_ARGUMENT must equal 3")
	assert(int32(code.Code_INVALID_ARGUMENT) == 3, "int32(Code_INVALID_ARGUMENT) must equal 3")
	assert(code.Code_INVALID_ARGUMENT.Number() == 3, "Code_INVALID_ARGUMENT.Number() must equal 3")

	// 2. code.Code_INVALID_ARGUMENT string formatting and lookup tables (Code_name and Code_value) round-trip
	assert(code.Code_INVALID_ARGUMENT.String() == "INVALID_ARGUMENT", "Code_INVALID_ARGUMENT.String() must be INVALID_ARGUMENT")
	assert(code.Code_name[int32(code.Code_INVALID_ARGUMENT)] == "INVALID_ARGUMENT", "Code_name[3] must be INVALID_ARGUMENT")
	assert(code.Code_value["INVALID_ARGUMENT"] == int32(code.Code_INVALID_ARGUMENT), "Code_value[INVALID_ARGUMENT] must be 3")

	// 3. status.Status with Code_INVALID_ARGUMENT marshals and unmarshals via protobuf preserving code and message
	st := &status.Status{
		Code:    int32(code.Code_INVALID_ARGUMENT),
		Message: "invalid argument: request_id must be non-empty",
	}
	assert(st.GetCode() == int32(code.Code_INVALID_ARGUMENT), "status code must equal Code_INVALID_ARGUMENT")

	wire, err := proto.Marshal(st)
	assert(err == nil && len(wire) > 0, "proto.Marshal(status) must succeed")

	var decoded status.Status
	err = proto.Unmarshal(wire, &decoded)
	assert(err == nil, "proto.Unmarshal(status) must succeed")
	assert(code.Code(decoded.GetCode()) == code.Code_INVALID_ARGUMENT, "decoded status code must match Code_INVALID_ARGUMENT")
	assert(decoded.GetMessage() == "invalid argument: request_id must be non-empty", "decoded status message must match")

	// 4. status.Status with Code_INVALID_ARGUMENT attaches and unpacks errdetails.BadRequest field violations
	badReq := &errdetails.BadRequest{
		FieldViolations: []*errdetails.BadRequest_FieldViolation{
			{
				Field:       "request_id",
				Description: "request_id must be a non-empty string",
			},
		},
	}
	detailAny, err := anypb.New(badReq)
	assert(err == nil, "anypb.New(BadRequest) must succeed")

	st.Details = []*anypb.Any{detailAny}
	var unpacked errdetails.BadRequest
	err = st.GetDetails()[0].UnmarshalTo(&unpacked)
	assert(err == nil, "UnmarshalTo(BadRequest) must succeed")
	assert(len(unpacked.GetFieldViolations()) == 1, "expected 1 field violation")
	assert(unpacked.GetFieldViolations()[0].GetField() == "request_id", "field violation name must match")

	fmt.Println("contract passed")
}