Render weather as a Kitty terminal background in Pi TUI
Session from pi-extensions-sessions on Hugging Face by thomasmustier · MIT · condensed by Coders Talk
Make the weather widget appear as an ambient background behind Pi's text instead of an overlay/widget, exploring terminal image layering options within Pi's TUI extension system.
- +0Prompt · +0Can we make the weather widget appear in Pi's background rather than as a widget/overlay?
- +0mAgent did · +0mInvestigated Pi's TUI/extension/theme APIs; concluded there's no true background layer and overlays composite on top, not behind, text.
- +8mIntervention · +8mDeveloper recalled seeing a genuinely semi-transparent image in a separate pi-nes project and asked the agent to check how that worked instead of accepting 'not possible'.Why: I remembered actually seeing this work before, so I pushed back instead of accepting the 'terminal can't do this' answer — that's what unlocked the real solution (Kitty z=-1).
- +24mAgent did · +24mBuilt WeatherBackground using Kitty graphics protocol at z=-1: extracted ansi-buffer.ts, created weather-bg.ts renderer, wired /weather-bg command into index.ts, verified via esbuild bundling.
- +40mFail · +40mNo image appeared at all after toggling /weather-bg; widget-based positioning placed the image only near the bottom of the screen, mostly off-screen.
- +50mFail · +50mAfter switching to direct terminal writes, image still didn't render due to a cols/columns property name bug found via debug logging; once fixed, the image appeared but corrupted TUI layout and caused components to shift upward on every render.
- +56mAgent did · +56mMoved rendering back into the widget cycle with C=1 cursor-lock, added zlib compression and 4x cell upscaling for resolution/perf, and created a custom 'weather' theme with transparent message backgrounds.
- +1h 37mIntervention · +1h 37mDeveloper reported borders still weren't showing, HUD fills flickering/duplicating background shapes, and explicitly told the agent not to patch Pi core.Why: The agent kept probing Pi's core rendering internals for a fix — I wanted to keep this scoped to our extension only, not touch core.
- +1h 52mFail · +1h 52mAfter several rounds of z-index and pause/throttle fixes, footer widget still rendered inconsistently, input box shifted vertically, and message fills kept flickering during streaming.
- +2h 6mAgent did · +2h 6mAbandoned live-animated background approach in favor of a static snapshot mode (one-time weather capture rendered once as background), and wrote a retrospective doc of what was tried and learned.
- +2h 8mOutcome · +2h 8mShipped static-snapshot weather background as /weather-bg, documented the live-animation investigation in .docs/weather-background-retrospective.md, excluded from npm package via .npmignore.
I'd start by asking directly whether Kitty's z-index image layering was available, since that's what ultimately worked — a lot of early exploration time went into overlay/theme APIs that were dead ends. The correction that did the work was pushing back on the agent's 'terminal can't do transparency' conclusion by pointing at a real prior example (pi-nes) instead of accepting it. In the end the live-animated background was too fragile (flicker, layout shifts, duplicate images) and we settled for a static snapshot, which I should have considered sooner given how much back-and-forth debugging the animated version took.