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The setup agent now gets its instructions and model from the ldcli-setup-agent AI Config on catfood. The CLI evaluates the config locally with the Go AI SDK, with the detected facts as context attributes, so targeting can give each kind of project its own instructions and model. When the config loads, its instructions decide the task, and the first message gives only the facts from setup. No SDK key is on the user's machine. The SDK gets the placeholder key ldcli-placeholder, and a loopback proxy adds the user's access token in LD-CLI-Token and forwards each request to the relay at /internal/ldcli-setup-agent/sdk under the user's base URI. The relay adds the real key. The proxy accepts requests only under a random path. The SDK client polls once, because setup reads the config once per run. A quick check before the SDK starts makes a refusal fall back at once, and it reads the environment ID from the relay. The CLI sets every SDK option in code, because the SDK reads LD_ variables that ldcli also uses, and it turns the SDK's logging off. If the user is not logged in, or the config cannot load, setup uses the built-in instructions. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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This adds the Go AI SDK (
github.com/launchdarkly/go-ai-sdk, pinned to commit 6152dc9) and reads theldcli-setup-agentAI Config through the SDK relay in gonfalon. No SDK key is on the user's machine.How it works
127.0.0.1under a random path.ldcli-placeholder, and every SDK option points at the proxy. The CLI sets each option in code, because the SDK readsLD_variables that ldcli also uses.LD-CLI-Tokenand forwards to<base-uri>/internal/ldcli-setup-agent/sdk/.... The relay adds the real key. The header does not start withX-LD-, because gonfalon strips client headers with that prefix.A quick check before the SDK starts makes a refusal fall back at once (the Go SDK retries a refused stream until its timeout), and it reads the environment ID from the
LD-Setup-Agent-Environment-IDheader. The SDK's logging is off, so it does not break the wizard's screen. If the config cannot load, setup uses the built-in instructions.Testing
A test starts the real AI SDK through the proxy against a fake relay. Other tests cover the proxy (token header, path mapping, secret path, streaming), refusals and an unreachable relay (fallback in less than one second), the options, the context, and the provider mapping. The path was tested end to end against a local gonfalon with the relay stack (launchdarkly/gonfalon#75196 to #75199) and a catfood config.
Stack
This is one of six PRs for the
ldcli setupagent. Review and merge them in order, after #877 (Go 1.26):They replace #876 and #878.
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