AI Summaries

Anthropic API key

Use claude-haiku-4-5 via the Anthropic API.

Get an API key

Create a key at console.anthropic.com. Keys start with sk-ant-.

Setup via init wizard

bash

larkx init

? AI summaries — how do you want to generate them?
    Skip  (recommended — summaries cost extra tokens)
    Local Claude  (uses your Claude subscription — no key needed)
  ❯ Anthropic API key

If ANTHROPIC_API_KEY is already set in your environment, larkx uses it automatically — no prompt. Otherwise the wizard asks you to paste your key, which is stored in .larkx/config.json (gitignored).

Setup via environment variable (alternative)

bash

# macOS / Linux
export ANTHROPIC_API_KEY=sk-ant-...

# Windows PowerShell
$env:ANTHROPIC_API_KEY="sk-ant-..."

# Then run
larkx index --ai

If ANTHROPIC_API_KEY is set in the environment but no AI provider is configured in config.json, larkx falls back to using it automatically for backward compatibility.

Model used

Summaries use claude-haiku-4-5 — Anthropic's fastest, lowest-cost model. Each summary is limited to 100 output tokens (one sentence). Files longer than 200 lines are truncated to the first 100 + last 20 lines before being sent.

Generate summaries

bash

larkx index --ai

larkx confirms before starting. Progress saves every 5 files so interrupted runs pick up where they left off.