agk — app-gui-kit Python server SDK
A small framework for building local, single-user GUIs for simulation / agent
applications. One AgkApp gives you a Flask server implementing the
app-gui-kit protocol, and the bundled frontend kit (framework-less Web
Components) gives you a ready-made shell — composer, streaming task log, and
pluggable result viewers (glTF / STL / FEM mesh / 2D fields / WebGPU / media /
cards / markdown / deck).
from agk import AgkApp
def runner(req, ctx):
ctx.emit.task("t1", "running", title="Analyze")
ctx.emit.text("working…")
if req.get("options", {}).get("step"):
ctx.gate("Proceed?") # human-in-the-loop gate
ctx.emit.artifact("gltf", url="/artifact/result.glb")
ctx.emit.task("t1", "done")
ctx.emit.done(summary="finished")
AgkApp("My Agent App", runner, capabilities=("step",)).run()
<!-- index.html — zero build step -->
<link rel="stylesheet" href="/agk/agk.css">
<script type="module" src="/agk/agk.js"></script>
<script type="module" src="/agk/agk-viewer-gltf.js"></script>
<agk-shell app="My Agent App"></agk-shell>
What AgkApp provides
POST /stream— SSE event streaming (single-flight), plus a polling transport for clients that cannot use SSEPOST /cancel/POST /reset/POST /intervene(HITL gates)GET /artifact/<path>(traversal-safe) andPOST /uploadGET /agk/<path>— serves the bundled frontend kit/alive+/byewindow-lifecycle watchdog (auto-exit when the tab closes)/agent/*remote-job queue for headless (LLM) driving/voice_status+/transcribewith a pluggable transcriber
Scaffolding
agk new my-sim-app --viewer field2d # Python app
Notes
- The protocol, endpoints, design tokens and viewer interface are specified in
the app-gui-kit repository (
spec/). - The bundled frontend (
agk/static/) includes three.js (MIT, © Three.js Authors); its license banner is retained in the bundle.
1 maintainer
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