Buffer activation command output, show summary on success

[Copilot]

Activation command output was displaying ANSI escape codes as literal text ([0;32m) instead of rendered colors in the output channel.

Changes

Before: Streamed all activation command output directly to output channel, showing raw ANSI codes

After:

• Buffer stdout/stderr during command execution
• Success (exit code 0): Display only "Activation command completed successfully"
• Failure (non-zero exit or error): Display command, buffered output, and error details

Extracted showFailureOutput() helper to avoid duplication between error and close handlers.

// Success case - clean output
outputChannel?.appendLine(`Activation command completed successfully`);

// Failure case - full diagnostic output
showFailureOutput();
outputChannel?.appendLine(`\nProcess exited with code ${code}`);

This eliminates the ANSI rendering issue while providing a cleaner activation experience.

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:

• github-production-user-asset-6210df.s3.amazonaws.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns 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

---

This section details on the original issue you should resolve

<issue_title>Activation command ANSI codes don't render as expected in extension output</issue_title>
<issue_description>

• Options are to ensure they render correctly
• Unlesss activation command fails just summarise that it worked</issue_description>

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

• Fixes Activation command ANSI codes don't render as expected in extension output #30

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[mtharrison]

Manually tested this, confirmed failed activation command ouputs error, otherwise just summarises success.

[github-actions]

🎉 This PR is included in version 5.4.2 🎉

The release is available on:

• v5.4.2
• GitHub release

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