Bump minimum Go version from 1.24 to 1.25

Update go.mod, CI matrix, devcontainer, README, and CLAUDE.md to
require Go 1.25 as the minimum supported version, with CI now
testing against Go 1.25 and 1.26.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jackc

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/devcontainers/go:2-1.25-trixie
+FROM mcr.microsoft.com/devcontainers/go:2-1.26-trixie
 
 RUN apt-get update && apt-get install -y postgresql-common \
     && yes | /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh \

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        go-version: ["1.24", "1.25"]
+        go-version: ["1.25", "1.26"]
         pg-version: [14, 15, 16, 17, 18, cockroachdb]
         include:
           - pg-version: 14
@@ -133,7 +133,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        go-version: ["1.24", "1.25"]
+        go-version: ["1.25", "1.26"]
 
     steps:
       - name: Setup PostgreSQL

CLAUDE.md

@@ -4,7 +4,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Project Overview
 
-pgx is a PostgreSQL driver and toolkit for Go (`github.com/jackc/pgx/v5`). It provides both a native PostgreSQL interface and a `database/sql` compatible driver. Requires Go 1.24+ and supports PostgreSQL 14+ and CockroachDB.
+pgx is a PostgreSQL driver and toolkit for Go (`github.com/jackc/pgx/v5`). It provides both a native PostgreSQL interface and a `database/sql` compatible driver. Requires Go 1.25+ and supports PostgreSQL 14+ and CockroachDB.
 
 ## Build & Test Commands
 
@@ -70,4 +70,4 @@ Supporting packages:
 - **Tracer interfaces** — observability via `QueryTracer`, `BatchTracer`, `CopyFromTracer`, `PrepareTracer` on `ConnConfig.Tracer`.
 - **Formatting** — always run `goimports -w .` after making changes to ensure code is properly formatted. CI checks formatting via `gofmt -l -s -w . && git diff --exit-code`. `gofumpt` with extra rules is also enforced via `golangci-lint`.
 - **Linters** — `govet` and `ineffassign` only (configured in `.golangci.yml`).
-- **CI matrix** — tests run against Go 1.24/1.25 × PostgreSQL 14-18 + CockroachDB, on Linux and Windows. Race detector enabled on Linux only.
+- **CI matrix** — tests run against Go 1.25/1.26 × PostgreSQL 14-18 + CockroachDB, on Linux and Windows. Race detector enabled on Linux only.

README.md

@@ -92,7 +92,7 @@ See the presentation at Golang Estonia, [PGX Top to Bottom](https://www.youtube.
 
 ## Supported Go and PostgreSQL Versions
 
-pgx supports the same versions of Go and PostgreSQL that are supported by their respective teams. For [Go](https://golang.org/doc/devel/release.html#policy) that is the two most recent major releases and for [PostgreSQL](https://www.postgresql.org/support/versioning/) the major releases in the last 5 years. This means pgx supports Go 1.24 and higher and PostgreSQL 14 and higher. pgx also is tested against the latest version of [CockroachDB](https://www.cockroachlabs.com/product/).
+pgx supports the same versions of Go and PostgreSQL that are supported by their respective teams. For [Go](https://golang.org/doc/devel/release.html#policy) that is the two most recent major releases and for [PostgreSQL](https://www.postgresql.org/support/versioning/) the major releases in the last 5 years. This means pgx supports Go 1.25 and higher and PostgreSQL 14 and higher. pgx also is tested against the latest version of [CockroachDB](https://www.cockroachlabs.com/product/).
 
 ## Version Policy
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/jackc/pgx/v5
 
-go 1.24.0
+go 1.25.0
 
 require (
 	github.com/jackc/pgpassfile v1.0.0