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Copilot CLI

Use GitHub Copilot CLI for multi-model cloud analysis powered by GitHub's AI infrastructure. Copilot CLI supports Claude, GPT, and Gemini model families through a single tool.

Requirements

  • copilot CLI installed.

  • GitHub authentication completed (copilot auth login or active GitHub session).

Setup

  1. Install CLI:

brew install copilot-cli

  1. Authenticate:

copilot auth login

  1. Verify locally:

copilot -p "hello"

  1. Configure in AI Backend settings tab.

Configuration

Setting
Value

Preferred Backend

copilot-cli

Copilot CLI Command

copilot or full path

Model examples:

The extension does not maintain a Copilot model allowlist: it forwards the configured command. Available models therefore depend on the installed Copilot CLI version and the authenticated account; use copilot --help to confirm identifiers before saving one.

Notes

Large Prompt Fallback

For prompts above 32_000 characters, the extension writes the combined prompt to a burp_uv_prompt_*.txt temp file (POSIX 0600 where supported) and passes its path to Copilot with an instruction to read the file. The temp file is deleted in a finally block once the response is consumed. This avoids OS-level argv/stdin length limits on long contexts.

Non-Interactive Mode

The extension invokes Copilot CLI with -p (non-interactive) flag, which executes the prompt and exits after completion.

Windows

npm-installed CLI shims are resolved automatically on Windows. The extension detects .cmd siblings and uses them instead of shell script shims that Java cannot execute directly.

Troubleshooting

  • command not found: use full binary path (e.g., /opt/homebrew/bin/copilot).

  • Windows: npm shim paths are resolved automatically. If auto-resolution fails, use the full .cmd path.

  • Auth issues: re-run copilot auth login or verify GitHub session.

  • Empty output: check Burp extension output/errors tabs and model flag validity.

  • Model errors: verify model name matches available choices with copilot --help.

Related Pages

PreviousCodex CLI
NextOpenCode CLI

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