Release Notes for Internal Go Platform Changes

Internal Go platform releases (shared modules, Go toolchain bumps, linter baselines) fail when service owners learn about breaking changes from CI red builds on Monday morning.

Good release notes read like a product launch for engineers: what changed, who must act, by when, and how to get help.

Summary

Publish notes before the change hits default CI.

Lead with effective date and required actions.

Document breaking API changes with before/after snippets.

List verification commands (go test, go fix, govulncheck).

Provide office hours or a Slack channel with named owners.

Archive notes in-repo for audit and onboarding.

Recipe

Release note skeleton for a shared module major bump.

# Release: github.com/acme/platform/auth/v3
 
**Version:** v3.2.0
**Effective:** 2026-08-15 (CI enforces on `main`)
**Owner:** @platform-auth
 
## Action required
1. Bump `require github.com/acme/platform/auth/v3 v3.2.0`
2. Replace `Verify(token)` with `Verify(ctx, token)`
3. Run `go test ./...` and `golangci-lint run`
 
## Breaking changes
- `AuthClient.Verify` now requires `context.Context` (deadline propagation)
 
## Migration
\`\`\`go
// before
ok, err := client.Verify(token)
// after
ok, err := client.Verify(ctx, token)
\`\`\`
 
## Support
- #go-platform-auth
- Office hours Tue 10:00-11:00 UTC

When to reach for this:

• Shared internal module major or minor with API breaks
• Org-wide Go toolchain upgrades
• golangci-lint config changes that fail CI
• New required interceptors or auth middleware

Working Example

Full internal note for Go 1.26 monorepo upgrade plus module publish.

# Platform release: Go 1.26 toolchain + libs/common/v2
 
**Effective:** 2026-09-01
**CI gate:** PRs must pass on `go1.26.x` after Aug 25
**Owners:** @platform-toolchain, @platform-common
 
## Summary
All services must build with Go 1.26.x. `libs/common/v2` adds structured logging helpers; v1 deprecated.
 
## Action required (every service team)
| Step | Command / task | Due |
|------|----------------|-----|
| Update devcontainer / local Go | `go version` → 1.26.x | Aug 20 |
| Bump module directive | `go get go@1.26.0 && go mod tidy` | Aug 25 |
| Modernize | `go fix ./...` (run twice) | Aug 25 |
| Bump common lib | `go get github.com/acme/libs/common/v2@v2.0.0` | Sep 1 |
| Canary | Deploy 10% and watch p99 + GC CPU 48h | Sep 3 |
 
## Breaking: libs/common/v2
- `log.Printf` wrappers removed; use `slog` helpers in `common/slogx`
- Import path: `github.com/acme/libs/common/v2/slogx`
 
\`\`\`go
// migration
import "github.com/acme/libs/common/v2/slogx"
 
slogx.Info(ctx, "invoice exported", "invoice_id", id)
\`\`\`
 
## Non-breaking runtime notes
- Green Tea GC default in 1.26 - watch `go_gc_duration_seconds` during canary
- Rollback lever: `GOEXPERIMENT=nogreenteagc` documented in runbook (link)
 
## Verification
\`\`\`bash
go test -race ./...
go vet ./...
govulncheck ./...
\`\`\`
 
## FAQ
**Q:** Can we stay on 1.24 until Q4?
**A:** No - security policy requires 1.26.1 by Sep 15.
 
## Support
#go-platform | Office hours Wed 15:00 UTC | Runbook: docs/platform/go-1.26.md

What this demonstrates:

• Effective date separate from CI enforcement date
• Tabular actions with due dates for program tracking
• Breaking changes include import path and snippet
• Runtime notes connect to observability stakeholders care about
• Policy exceptions answered directly in FAQ

Deep Dive

How It Works

Release note sections

Audience layering

Distribution checklist

1. Post to engineering newsletter.
2. Pin in #go-platform with @here on effective week.
3. Open CI ticket template pre-filled with steps.
4. Add entry to platform changelog repo.
5. Present 5 minutes in eng all-hands for major breaks.

Go Notes

# Changelog entry in repo docs/platform/CHANGELOG.md
## 2026-09-01 - Go 1.26 + common/v2
- ACTION: all modules on go 1.26.x
- BREAKING: common/v2 slogx migration

• Tag git releases on platform modules matching note version.
• Use go work sync callout when monorepo uses workspaces.

Gotchas

• Effective date surprise - Teams on vacation miss window. Fix: Two-week minimum notice for breaking changes; CI warning period first.
• Snippet without module path - Copy-paste fails. Fix: Full import paths and versions in every example.
• Breaking buried in changelog - Nobody reads paragraph 12. Fix: Breaking section at top after actions.
• No verification block - "Works on my machine" PRs. Fix: Mirror exact CI commands.
• Missing owner - Questions go unanswered. Fix: Named owner and backup in header.
• Silent lint rule additions - CI fails on style debates. Fix: Separate note for linter with autofix commands.

Alternatives

FAQs

Related

• Planning Go Version Upgrades Across a Monorepo - upgrade playbook
• Prioritizing Features vs Platform Work in Go - scheduling platform releases
• Stakeholder Collaboration Basics - release note skeleton example
• Risk Registers for Go Migration Projects - risks tied to platform changes

Stack versions: This page was written for Go 1.26.x (Green Tea GC default, go fix modernizers - verify patch at build), chi (latest - verify at build), gin (latest - verify at build), echo (latest - verify at build), google.golang.org/grpc (latest - verify at build), sigs.k8s.io/controller-runtime (latest - verify at build), kubebuilder (latest - verify at build), tinygo (latest - verify board targets at build), wazero (latest - verify at build), and golangci-lint (latest - verify linter set at build).