Vane

Facts

Openness

Open source

Licence

MIT

Language

TypeScript

Pinned version

9e8d883 (2026-04-09)

Topics checked

29 of 33

Kind of agent

General framework

Source repository (opens another site)

What it does notably well

• Loop discipline

  Vane picks the research loop's iteration bound from the request mode (speed 2, balanced 6, quality 25) and runs a bounded indexed for loop to that bound.

• Retrieval quality

  In Vane's quality mode a web search skips the cosine stage: an LLM picker chooses at most 3 result URLs, each is scraped with Playwright and extracted with Readability, split…

  Vane puts all research findings and widget outputs into the writer system prompt inside <search_results> and <widgets_result> tags, the writer prompt requires a [number] citation…

• Stopping

  Vane's research loop ends in three ways: the iteration cap (loop bound by mode), a turn with no tool calls, or a done call; all three then return the findings gathered so far.

• Streaming

  Vane emits newline-delimited JSON block frames (block, updateBlock, researchComplete, messageEnd) over a TransformStream, with same-process reconnect replay through POST…

• System prompt

  Vane assembles its answer front-loaded: all search findings and widget outputs are gathered first and placed as <search_results> and <widgets_result> inside the writer's system…