DEPL_2026.05.30
Portfolio Agent
Streaming chat agent — FastAPI + LangGraph + Anthropic
This is the agent answering questions about the portfolio in the panel below. A Nuxt/Nitro route proxies each message to a FastAPI service on a Hetzner VPS, which runs the turn through a LangGraph state graph backed by Anthropic's Claude (Haiku) and streams tokens back to the browser over Server-Sent Events.
Redis does the unglamorous work: a sliding-window rate limit and a daily token budget gate every request before it reaches the model, and an AsyncRedisSaver checkpointer persists each conversation by thread id so the graph resumes context across messages.
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Agent Tools
Tool
Purpose
Effect
set_theme
Restyle the whole UI from a seven-colour palette the model chooses — every shade in the interface is derived from those seeds.
Emits a theme directive; the page recolours instantly, independent of the light/dark setting.
set_theme
Purpose
Restyle the whole UI from a seven-colour palette the model chooses — every shade in the interface is derived from those seeds.
Effect
Emits a theme directive; the page recolours instantly, independent of the light/dark setting.
tailor_portfolio
Reorder and emphasise the skills panel and rebuild the downloadable CV around this visitor's stated role or interest.
Emits a tailor directive; the right panel reorders and the CV regenerates from the same selection.
tailor_portfolio
Purpose
Reorder and emphasise the skills panel and rebuild the downloadable CV around this visitor's stated role or interest.
Effect
Emits a tailor directive; the right panel reorders and the CV regenerates from the same selection.
The model calls these mid-conversation; each effect streams back as an SSE directive and applies live, without a page reload.