v1.8.4

1.8.4 (November 2, 2026)

✨ Features

• Custom Session Manager documents – Add ssm_document to use a custom port-forwarding document when ssh_interface is session_manager. (#718)
• Session Manager reconnection after reboot – Add opt-in session_manager_reconnect_on_reboot to restart the port-forwarding session when the instance's SSM agent disconnects. Requires ssm:GetConnectionStatus permission and defaults to false. (#719)
• IPv6 instance metadata endpoint – Add http_protocol_ipv6 support in metadata_options for on-demand and Spot instances. (#709)

🐛 Bug Fixes

• Updated EBS performance limits – Allow gp3 volumes with up to 80,000 IOPS and 2,000 MiB/s throughput, and io2 volumes with up to 256,000 IOPS. Update validation and documentation for the supported limits. (#723)

📦 Dependencies

• Bump github.com/hashicorp/packer-plugin-sdk from 0.6.11 → 0.6.13 and github.com/hashicorp/hcl/v2 from v2.24.0 → v2.25.0. (#713)
• Update the Go requirement from 1.26.8 → 1.26.10 and refresh dependencies, including golang.org/x/crypto to v0.58.0. (#722)
• Bump github.com/go-jose/go-jose/v4 from v4.1.4 → v4.1.7 and golang.org/x/net from v0.58.0 → v0.62.0.

🧹 Maintenance

• Refresh acceptance-test base images and test configuration. (#716)
• Add/update copyright headers. (#721)

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