build: upgrade to Go 1.26.0

Update Go version across the project:
- go.mod: 1.24.7 → 1.26.0
- CI workflows (ci.yml, build.yml): 1.25.0 → 1.26.0
- CI plugin workflows (ci-python, ci-kotlin, ci-typescript): 1.24.1 → 1.26.0
- Dockerfile: 1.25.5 → 1.26.0
- CLAUDE.md: update prerequisite version

https://claude.ai/code/session_01WLKDmB7kemgPsjsj9KFEXa

Author: claude

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     - uses: actions/checkout@v6
     - uses: actions/setup-go@v6
       with:
-        go-version: '1.25.0'
+        go-version: '1.26.0'
     - name: install ./...
       run: go build ./...
       env:

.github/workflows/ci-kotlin.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
-          go-version: '1.24.1'
+          go-version: '1.26.0'
       - name: install ./...
         run: go install ./...
       - uses: actions/checkout@v6

.github/workflows/ci-python.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
-          go-version: '1.24.1'
+          go-version: '1.26.0'
       - name: install ./...
         run: go install ./...
       - uses: actions/checkout@v6

.github/workflows/ci-typescript.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
-          go-version: '1.24.1'
+          go-version: '1.26.0'
       - name: install ./...
         run: go install ./...
       - uses: actions/checkout@v6

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v6
     - uses: actions/setup-go@v6
       with:
-        go-version: '1.25.0'
+        go-version: '1.26.0'
     - run: go build ./...
       env:
         CGO_ENABLED: "0"
@@ -28,7 +28,7 @@ jobs:
     - uses: actions/checkout@v6
     - uses: actions/setup-go@v6
       with:
-        go-version: '1.25.0'
+        go-version: '1.26.0'
 
     - name: install gotestsum
       run: go install gotest.tools/gotestsum@latest

CLAUDE.md

@@ -6,7 +6,7 @@ This document provides essential information for working with the sqlc codebase,
 
 ### Prerequisites
 
-- **Go 1.25.0+** - Required for building and testing
+- **Go 1.26.0+** - Required for building and testing
 - **Docker & Docker Compose** - Required for integration tests with databases (local development)
 - **Git** - For version control
 

Dockerfile

@@ -1,5 +1,5 @@
 # STEP 1: Build sqlc
-FROM golang:1.25.5 AS builder
+FROM golang:1.26.0 AS builder
 
 COPY . /workspace
 WORKDIR /workspace

go.mod

@@ -1,6 +1,6 @@
 module github.com/sqlc-dev/sqlc
 
-go 1.24.7
+go 1.26.0
 
 require (
 	github.com/antlr4-go/antlr/v4 v4.13.1