Fix OpenCode installation: switch from .zip to .tar.gz

[Copilot]

OpenCode releases changed asset format from .zip to .tar.gz, breaking installation with 404 errors.

Changes

• Download URL: Changed asset extension from .zip to .tar.gz
• Extraction: Replaced unzip -q with tar -xzf
• Dependencies: Swapped unzip for tar package
• Fallback version: Updated from 0.10.4 to 1.0.107 (first version with tar.gz support)

# Before
ASSET_NAME="opencode-${PLATFORM}-${ARCH_SUFFIX}.zip"
unzip -q "${ASSET_NAME}"

# After
ASSET_NAME="opencode-${PLATFORM}-${ARCH_SUFFIX}.tar.gz"
tar -xzf "${ASSET_NAME}"

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• containers.dev
  • Triggering command: /usr/local/bin/node node /usr/local/bin/devcontainer features test -f opencode -i ubuntu:latest (dns block)
• docker-images-prod.6aa30f8b08e16409b46e0173d6de2f56.r2.cloudflarestorage.com
  • Triggering command: /usr/local/bin/node node /usr/local/bin/devcontainer features test -f opencode -i ubuntu:latest (dns block)
• https://api.github.com/repos/sst/opencode/releases/latest
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
  • Triggering command: /usr/bin/curl curl -s -H Accept: application/vnd.github.v3+json REDACTED (http block)
  • Triggering command: /usr/bin/curl curl -s --max-time 10 REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Opencode feature fails with 404 because opencode releases updated endpoints</issue_title>
<issue_description>Current implementation pulls this giving a 404 https://github.com/sst/opencode/releases/download/v1.0.107/opencode-linux-x64.zip

Opencode updated the endpoint to https://github.com/sst/opencode/releases/download/v1.0.107/opencode-linux-x64.tar.gz</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Opencode feature fails with 404 because opencode releases updated endpoints #73

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[jsburckhardt]

Lgtm