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 UTCWhen 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.mdWhat 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
| Section | Purpose |
|---|---|
| Header | Version, effective date, owners |
| Action required | Numbered steps with deadlines |
| Breaking changes | API, behavior, CI |
| Migration | Copy-paste snippets |
| Verification | Commands that mirror CI |
| Support | Channel, hours, runbook link |
Audience layering
| Audience | What they read |
|---|---|
| Service lead | Action table + due dates |
| IC upgrading | Migration snippets + verification |
| SRE | Runtime notes, canary, rollback |
| PM | FAQ on schedule impact |
Distribution checklist
- Post to engineering newsletter.
- Pin in
#go-platformwith @here on effective week. - Open CI ticket template pre-filled with steps.
- Add entry to platform changelog repo.
- 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 synccallout 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
| Alternative | Use When | Don't Use When |
|---|---|---|
| Email only | Tiny consumer set (<5 teams) | Org-wide toolchain |
| Automated GitHub Release | Open module with many external users | Mixed internal Slack culture |
| Loom walkthrough | Large breaking UI-like DX change | Simple one-line API add |
| Deprecation window only | Soft removals | Security-forced immediate bump |
FAQs
How long before effective date should notes ship?
Two weeks minimum for breaking changes.
Four weeks for Go toolchain jumps affecting every service.
Should notes include non-breaking features?
Yes in a "Highlights" section below actions.
Never bury actions below feature marketing.
Where should notes live?
docs/platform/releases/ in a central repo plus Slack archive.
Link from CI failure messages when possible.
How handle teams that miss the date?
CI enforcement with escape hatch ticket requiring EM approval and dated remediation.
Do consumers need semver training?
Notes should say exact go get path and version.
Semver rules link in appendix.
What about retracted module versions?
Note must say retract directive added and minimum safe version.
Should product managers receive notes?
CC on toolchain or compliance releases that move feature dates.
Skip routine patch lib updates.
How version notes themselves?
Date-based (2026-09-01-go-1.26) or match module tag.
Stay consistent in changelog index.
Include rollback steps?
Yes for runtime and CI changes.
Link runbook section with GOEXPERIMENT or image pin steps.
Can bots generate notes?
Bots draft from semver diff and go fix summary.
Human edits for actions, dates, and policy.
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).