Dexter — A Financial Research Agent in Bun

Fri, 08 May 2026 00:00:00 +0000

Dexter is an autonomous research agent for financial analysis. You ask a question, it plans the steps, pulls income statements, balance sheets, and cash flows from the Financial Datasets API, validates its own answer, and iterates until it’s done. The README pitches it as “Claude Code, but for financial research” — that framing is closer to honest than most.

The part I’d steal first is the scratchpad. Every query writes a .dexter/scratchpad/<timestamp>_<hash>.jsonl file with newline-delimited entries: the original question, every tool call with its raw result, the LLM summary of that result, and the agent’s reasoning steps. JSONL on disk, not a hosted trace UI, not OpenTelemetry — just a file you can grep. For an agent that touches numbers people will act on, an auditable log isn’t optional, and most agent projects bolt this on later.

Finance on cloud_affects

Dexter — A Financial Research Agent in Bun