Heroku CLI v10: Support for Next Generation Heroku Platform

Summary

Heroku CLI v10.0.0 updates the command-line tool for the next-generation Fir platform while introducing breaking changes and a Node.js 20 runtime. Fir users must replace several legacy command forms, including logs and ps:stop/ps:restart arguments, and use heroku run:inside because heroku run, ps:exec, ps:copy, ps:forward, and ps:socks do not work with Fir apps. New Fir support includes heroku telemetry commands for OpenTelemetry, a generation selector for spaces:create, generation details in space commands, Fir-aware pipeline and buildpack output, and real-time log streaming with --tail. The release also upgrades oclif to v4.14.36, updates GitHub workflows to Node 20, fixes log color rendering, and is available through heroku update.

Takeaways

1. 1

   Fir apps require --process-type or --dyno-name for relevant logs, ps:stop, and ps:restart usage; older forms remain available for Cedar apps with deprecation warnings.

2. 2

   The new heroku telemetry command suite integrates Fir apps with OpenTelemetry, while spaces commands expose space generation and spaces:create accepts a --generation flag.

3. 3

   Several existing commands do not work with Fir apps, including heroku run, heroku ps:exec, heroku ps:copy, heroku ps:forward, and heroku ps:socks; heroku run:inside is the replacement.