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feat: Day 11 - landing page polish, SDK README, PyPI publish as vectry-agentlens

Browse Source 
- Landing page: pip install snippet, How it Works section, dual code examples (decorator + OpenAI wrapper), Integrations section, Open Source badge
- SDK README: quickstart, OpenAI/LangChain/Custom integrations, API reference, architecture diagram
- Published vectry-agentlens v0.1.0 to PyPI (import as agentlens)
- Fixed pyproject.toml: hatchling.build backend, wheel package mapping
This commit is contained in:
Vectry
2026-02-10 01:27:00 +00:00
parent 93e69105ea
commit 0cd242447c
4 changed files with 615 additions and 71 deletions
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368
apps/web/src/app/page.tsx
View File

@@ -7,6 +7,14 @@ import {
GitBranch, GitBranch,
Cpu, Cpu,
Zap, Zap,
Terminal,
Code2,
Eye,
Package,
Link2,
Bot,
Star,
Clipboard,
} from "lucide-react"; } from "lucide-react";
export default function HomePage() { export default function HomePage() {
@@ -16,13 +24,27 @@ export default function HomePage() {
<section className="relative overflow-hidden border-b border-neutral-800/50"> <section className="relative overflow-hidden border-b border-neutral-800/50">
<div className="absolute inset-0 bg-gradient-to-b from-emerald-500/5 via-transparent to-transparent" /> <div className="absolute inset-0 bg-gradient-to-b from-emerald-500/5 via-transparent to-transparent" />
<div className="absolute inset-0 bg-[radial-gradient(ellipse_80%_50%_at_50%_-20%,rgba(16,185,129,0.1),transparent)]" /> <div className="absolute inset-0 bg-[radial-gradient(ellipse_80%_50%_at_50%_-20%,rgba(16,185,129,0.1),transparent)]" />
{/* Subtle grid pattern for depth */}
<div className="absolute inset-0 bg-[linear-gradient(rgba(255,255,255,0.012)_1px,transparent_1px),linear-gradient(90deg,rgba(255,255,255,0.012)_1px,transparent_1px)] bg-[size:64px_64px]" />
<div className="relative max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 pt-20 pb-24"> <div className="relative max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 pt-20 pb-24">
<div className="text-center"> <div className="text-center">
<div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-emerald-500/20 bg-emerald-500/5 text-emerald-400 text-sm mb-8"> {/* Top badges row */}
<div className="flex flex-wrap items-center justify-center gap-3 mb-8">
<div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-emerald-500/20 bg-emerald-500/5 text-emerald-400 text-sm">
<Zap className="w-4 h-4" /> <Zap className="w-4 h-4" />
<span>Agent Observability Platform</span> <span>Agent Observability Platform</span>
</div> </div>
<a
href="https://gitea.repi.fun/repi/agentlens"
target="_blank"
rel="noopener noreferrer"
className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-neutral-700/50 bg-neutral-800/30 text-neutral-400 text-sm hover:border-neutral-600 hover:text-neutral-300 transition-all duration-200"
>
<Star className="w-3.5 h-3.5" />
<span>Open Source</span>
</a>
</div>
<h1 className="text-6xl sm:text-7xl md:text-8xl font-bold tracking-tight mb-6"> <h1 className="text-6xl sm:text-7xl md:text-8xl font-bold tracking-tight mb-6">
<span className="bg-gradient-to-br from-emerald-400 via-emerald-300 to-emerald-500 bg-clip-text text-transparent"> <span className="bg-gradient-to-br from-emerald-400 via-emerald-300 to-emerald-500 bg-clip-text text-transparent">
@@ -30,16 +52,31 @@ export default function HomePage() {
</span> </span>
</h1> </h1>
<p className="text-xl sm:text-2xl text-neutral-400 max-w-3xl mx-auto mb-10 leading-relaxed"> <p className="text-xl sm:text-2xl text-neutral-400 max-w-3xl mx-auto mb-8 leading-relaxed">
See why your AI agents make the decisions they make. <br className="hidden sm:block" /> See why your AI agents make the decisions they make. <br className="hidden sm:block" />
Complete observability for multi-agent systems. Complete observability for multi-agent systems.
</p> </p>
{/* pip install snippet */}
<div className="flex justify-center mb-10">
<div className="inline-flex items-center gap-3 px-5 py-3 rounded-full bg-neutral-800/80 border border-neutral-700/50 backdrop-blur-sm">
<Terminal className="w-4 h-4 text-neutral-500 flex-shrink-0" />
<code className="text-sm sm:text-base font-mono text-emerald-400 tracking-wide select-all">
pip install vectry-agentlens
</code>
<div className="w-px h-5 bg-neutral-700" />
<Clipboard className="w-4 h-4 text-neutral-500 flex-shrink-0" />
</div>
</div>
<div className="flex flex-col sm:flex-row gap-4 justify-center items-center"> <div className="flex flex-col sm:flex-row gap-4 justify-center items-center">
<button className="group px-8 py-4 bg-emerald-500 hover:bg-emerald-400 text-neutral-950 font-semibold rounded-lg transition-all duration-200 flex items-center gap-2 shadow-lg shadow-emerald-500/25 hover:shadow-emerald-500/40"> <a
href="/dashboard"
className="group px-8 py-4 bg-emerald-500 hover:bg-emerald-400 text-neutral-950 font-semibold rounded-lg transition-all duration-200 flex items-center gap-2 shadow-lg shadow-emerald-500/25 hover:shadow-emerald-500/40"
>
Get Started Get Started
<ArrowRight className="w-5 h-5 group-hover:translate-x-1 transition-transform" /> <ArrowRight className="w-5 h-5 group-hover:translate-x-1 transition-transform" />
</button> </a>
<a <a
href="https://gitea.repi.fun/repi/agentlens" href="https://gitea.repi.fun/repi/agentlens"
target="_blank" target="_blank"
@@ -84,7 +121,7 @@ export default function HomePage() {
</div> </div>
<h3 className="text-xl font-semibold mb-3">Context Awareness</h3> <h3 className="text-xl font-semibold mb-3">Context Awareness</h3>
<p className="text-neutral-400 leading-relaxed"> <p className="text-neutral-400 leading-relaxed">
Monitor context window utilization in real-time. Track what's being fed into your agents and what's being left behind. Monitor context window utilization in real-time. Track what&apos;s being fed into your agents and what&apos;s being left behind.
</p> </p>
</div> </div>
@@ -102,11 +139,102 @@ export default function HomePage() {
</div> </div>
</section> </section>
{/* How it Works Section */}
<section className="py-24 border-b border-neutral-800/50 relative">
<div className="absolute inset-0 bg-[radial-gradient(ellipse_60%_40%_at_50%_50%,rgba(16,185,129,0.04),transparent)]" />
<div className="relative max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
<div className="text-center mb-16">
<div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-neutral-700 bg-neutral-800/30 text-neutral-400 text-sm mb-6">
<Zap className="w-4 h-4" />
<span>Quick Setup</span>
</div>
<h2 className="text-3xl sm:text-4xl font-bold mb-4">
Up and running in 3 steps
</h2>
<p className="text-lg text-neutral-400 max-w-2xl mx-auto">
Go from zero to full agent observability in under five minutes
</p>
</div>
<div className="grid md:grid-cols-3 gap-6 lg:gap-8">
{/* Step 1: Install */}
<div className="relative p-8 rounded-2xl border border-neutral-800/50 bg-neutral-900/30">
<div className="absolute -top-4 left-8">
<span className="inline-flex items-center justify-center w-8 h-8 rounded-full bg-emerald-500 text-neutral-950 text-sm font-bold shadow-lg shadow-emerald-500/25">
1
</span>
</div>
<div className="w-12 h-12 rounded-xl bg-emerald-500/10 flex items-center justify-center mb-5 mt-2">
<Package className="w-6 h-6 text-emerald-400" />
</div>
<h3 className="text-lg font-semibold mb-2">Install</h3>
<p className="text-neutral-400 text-sm mb-4">
One command to add AgentLens to your project.
</p>
<div className="px-4 py-2.5 rounded-lg bg-neutral-800/80 border border-neutral-700/50">
<code className="text-sm font-mono text-emerald-400">pip install vectry-agentlens</code>
</div>
</div>
{/* Step 2: Instrument */}
<div className="relative p-8 rounded-2xl border border-neutral-800/50 bg-neutral-900/30">
<div className="absolute -top-4 left-8">
<span className="inline-flex items-center justify-center w-8 h-8 rounded-full bg-emerald-500 text-neutral-950 text-sm font-bold shadow-lg shadow-emerald-500/25">
2
</span>
</div>
<div className="w-12 h-12 rounded-xl bg-emerald-500/10 flex items-center justify-center mb-5 mt-2">
<Code2 className="w-6 h-6 text-emerald-400" />
</div>
<h3 className="text-lg font-semibold mb-2">Instrument</h3>
<p className="text-neutral-400 text-sm mb-4">
Add the <code className="text-emerald-400/80 font-mono text-xs bg-emerald-500/5 px-1.5 py-0.5 rounded">@trace</code> decorator or use <code className="text-emerald-400/80 font-mono text-xs bg-emerald-500/5 px-1.5 py-0.5 rounded">wrap_openai()</code>.
</p>
<div className="px-4 py-2.5 rounded-lg bg-neutral-800/80 border border-neutral-700/50">
<code className="text-sm font-mono text-emerald-400">@trace</code>
<span className="text-neutral-600 text-sm font-mono"> / </span>
<code className="text-sm font-mono text-emerald-400">wrap_openai()</code>
</div>
</div>
{/* Step 3: Observe */}
<div className="relative p-8 rounded-2xl border border-neutral-800/50 bg-neutral-900/30">
<div className="absolute -top-4 left-8">
<span className="inline-flex items-center justify-center w-8 h-8 rounded-full bg-emerald-500 text-neutral-950 text-sm font-bold shadow-lg shadow-emerald-500/25">
3
</span>
</div>
<div className="w-12 h-12 rounded-xl bg-emerald-500/10 flex items-center justify-center mb-5 mt-2">
<Eye className="w-6 h-6 text-emerald-400" />
</div>
<h3 className="text-lg font-semibold mb-2">Observe</h3>
<p className="text-neutral-400 text-sm mb-4">
See every decision in the real-time dashboard.
</p>
<div className="px-4 py-2.5 rounded-lg bg-neutral-800/80 border border-neutral-700/50">
<code className="text-sm font-mono text-emerald-400">agentlens.vectry.tech</code>
</div>
</div>
</div>
{/* Connecting arrows decoration */}
<div className="hidden md:flex items-center justify-center mt-10">
<div className="flex items-center gap-2">
<div className="w-16 h-px bg-gradient-to-r from-transparent to-emerald-500/30" />
<ArrowRight className="w-4 h-4 text-emerald-500/40" />
<div className="w-16 h-px bg-emerald-500/30" />
<ArrowRight className="w-4 h-4 text-emerald-500/40" />
<div className="w-16 h-px bg-gradient-to-l from-transparent to-emerald-500/30" />
</div>
</div>
</div>
</section>
{/* Code Example Section */} {/* Code Example Section */}
<section className="py-24 border-b border-neutral-800/50"> <section className="py-24 border-b border-neutral-800/50">
<div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8"> <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
<div className="grid lg:grid-cols-2 gap-12 items-center"> <div className="grid lg:grid-cols-2 gap-12 items-start">
<div> <div className="lg:sticky lg:top-8">
<div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-neutral-700 bg-neutral-800/30 text-neutral-400 text-sm mb-6"> <div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-neutral-700 bg-neutral-800/30 text-neutral-400 text-sm mb-6">
<Cpu className="w-4 h-4" /> <Cpu className="w-4 h-4" />
<span>Python SDK</span> <span>Python SDK</span>
@@ -136,45 +264,211 @@ export default function HomePage() {
</ul> </ul>
</div> </div>
{/* Code Block */} {/* Code Blocks - Two patterns stacked */}
<div className="space-y-6">
{/* Decorator Pattern */}
<div className="rounded-xl overflow-hidden border border-neutral-800 bg-neutral-900/50 backdrop-blur-sm"> <div className="rounded-xl overflow-hidden border border-neutral-800 bg-neutral-900/50 backdrop-blur-sm">
<div className="px-4 py-3 border-b border-neutral-800 flex items-center gap-2"> <div className="px-4 py-3 border-b border-neutral-800 flex items-center justify-between">
<div className="flex gap-2"> <div className="flex items-center gap-2">
<div className="w-3 h-3 rounded-full bg-neutral-600" /> <div className="flex gap-1.5">
<div className="w-3 h-3 rounded-full bg-neutral-600" /> <div className="w-3 h-3 rounded-full bg-neutral-700" />
<div className="w-3 h-3 rounded-full bg-neutral-600" /> <div className="w-3 h-3 rounded-full bg-neutral-700" />
<div className="w-3 h-3 rounded-full bg-neutral-700" />
</div> </div>
<span className="ml-4 text-sm text-neutral-500">example.py</span> <span className="ml-3 text-sm text-neutral-500">decorator_pattern.py</span>
</div> </div>
<pre className="p-6 overflow-x-auto text-sm"> <span className="text-xs font-medium px-2.5 py-1 rounded-full bg-emerald-500/10 text-emerald-400 border border-emerald-500/20">
@trace
</span>
</div>
<pre className="p-6 overflow-x-auto text-sm leading-relaxed">
<code className="text-neutral-300"> <code className="text-neutral-300">
<span className="text-purple-400">from</span> <span className="text-neutral-300">agentlens</span> <span className="text-purple-400">import</span> <span className="text-emerald-300">init</span><span className="text-neutral-300">,</span> <span className="text-emerald-300">trace</span> <span className="text-purple-400">from</span>{" "}
<br /> <span className="text-neutral-300">agentlens</span>{" "}
<br /> <span className="text-purple-400">import</span>{" "}
<span className="text-emerald-300">init</span>
<span className="text-neutral-300">,</span>{" "}
<span className="text-emerald-300">trace</span>
{"\n"}
{"\n"}
<span className="text-neutral-500"># Initialize AgentLens</span> <span className="text-neutral-500"># Initialize AgentLens</span>
<br /> {"\n"}
<span className="text-emerald-300">init</span><span className="text-neutral-300">(</span> <span className="text-emerald-300">init</span>
<br /> <span className="text-neutral-300">(</span>
&nbsp;&nbsp;&nbsp;&nbsp;<span className="text-orange-300">api_key</span><span className="text-neutral-300">=</span><span className="text-emerald-300">"your-api-key"</span><span className="text-neutral-300">,</span> {"\n"}
<br /> {" "}
&nbsp;&nbsp;&nbsp;&nbsp;<span className="text-orange-300">endpoint</span><span className="text-neutral-300">=</span><span className="text-emerald-300">"https://agentlens.vectry.tech"</span> <span className="text-orange-300">api_key</span>
<br /> <span className="text-neutral-300">=</span>
<span className="text-emerald-300">&quot;your-api-key&quot;</span>
<span className="text-neutral-300">,</span>
{"\n"}
{" "}
<span className="text-orange-300">endpoint</span>
<span className="text-neutral-300">=</span>
<span className="text-emerald-300">&quot;https://agentlens.vectry.tech&quot;</span>
{"\n"}
<span className="text-neutral-300">)</span> <span className="text-neutral-300">)</span>
<br /> {"\n"}
<br /> {"\n"}
<span className="text-neutral-500"># Trace your agent function</span> <span className="text-neutral-500"># Trace your agent function</span>
<br /> {"\n"}
<span className="text-purple-400">@trace</span><span className="text-neutral-300">(</span><span className="text-orange-300">name</span><span className="text-neutral-300">=</span><span className="text-emerald-300">"research-agent"</span><span className="text-neutral-300">)</span> <span className="text-purple-400">@trace</span>
<br /> <span className="text-neutral-300">(</span>
<span className="text-purple-400">async</span> <span className="text-purple-400">def</span> <span className="text-emerald-300">research</span><span className="text-neutral-300">(</span><span className="text-blue-300">topic</span><span className="text-neutral-300">:</span> <span className="text-blue-300">str</span><span className="text-neutral-300">):</span> <span className="text-orange-300">name</span>
<br /> <span className="text-neutral-300">=</span>
&nbsp;&nbsp;&nbsp;&nbsp;<span className="text-neutral-500"># Your agent logic here</span> <span className="text-emerald-300">&quot;research-agent&quot;</span>
<br /> <span className="text-neutral-300">)</span>
&nbsp;&nbsp;&nbsp;&nbsp;<span className="text-purple-400">return</span> <span className="text-emerald-300">f"Researching: {"{topic"}"</span> {"\n"}
<span className="text-purple-400">async</span>{" "}
<span className="text-purple-400">def</span>{" "}
<span className="text-emerald-300">research</span>
<span className="text-neutral-300">(</span>
<span className="text-blue-300">topic</span>
<span className="text-neutral-300">:</span>{" "}
<span className="text-blue-300">str</span>
<span className="text-neutral-300">):</span>
{"\n"}
{" "}
<span className="text-neutral-500"># Your agent logic here</span>
{"\n"}
{" "}
<span className="text-purple-400">return</span>{" "}
<span className="text-emerald-300">f&quot;Researching: {"{topic}"}&quot;</span>
</code> </code>
</pre> </pre>
</div> </div>
{/* OpenAI Wrapper Pattern */}
<div className="rounded-xl overflow-hidden border border-neutral-800 bg-neutral-900/50 backdrop-blur-sm">
<div className="px-4 py-3 border-b border-neutral-800 flex items-center justify-between">
<div className="flex items-center gap-2">
<div className="flex gap-1.5">
<div className="w-3 h-3 rounded-full bg-neutral-700" />
<div className="w-3 h-3 rounded-full bg-neutral-700" />
<div className="w-3 h-3 rounded-full bg-neutral-700" />
</div>
<span className="ml-3 text-sm text-neutral-500">openai_wrapper.py</span>
</div>
<span className="text-xs font-medium px-2.5 py-1 rounded-full bg-purple-500/10 text-purple-400 border border-purple-500/20">
wrap_openai
</span>
</div>
<pre className="p-6 overflow-x-auto text-sm leading-relaxed">
<code className="text-neutral-300">
<span className="text-purple-400">from</span>{" "}
<span className="text-neutral-300">agentlens.integrations.openai</span>{" "}
<span className="text-purple-400">import</span>{" "}
<span className="text-emerald-300">wrap_openai</span>
{"\n"}
<span className="text-purple-400">import</span>{" "}
<span className="text-neutral-300">openai</span>
{"\n"}
{"\n"}
<span className="text-neutral-500"># Wrap the OpenAI client</span>
{"\n"}
<span className="text-neutral-300">client</span>{" "}
<span className="text-neutral-300">=</span>{" "}
<span className="text-neutral-300">openai.</span>
<span className="text-emerald-300">OpenAI</span>
<span className="text-neutral-300">()</span>
{"\n"}
<span className="text-neutral-300">client</span>{" "}
<span className="text-neutral-300">=</span>{" "}
<span className="text-emerald-300">wrap_openai</span>
<span className="text-neutral-300">(client)</span>
{"\n"}
{"\n"}
<span className="text-neutral-500"># Use as normal - traces automatically</span>
{"\n"}
<span className="text-neutral-300">response</span>{" "}
<span className="text-neutral-300">=</span>{" "}
<span className="text-neutral-300">client.chat.completions.</span>
<span className="text-emerald-300">create</span>
<span className="text-neutral-300">(</span>
{"\n"}
{" "}
<span className="text-orange-300">model</span>
<span className="text-neutral-300">=</span>
<span className="text-emerald-300">&quot;gpt-4&quot;</span>
<span className="text-neutral-300">,</span>
{"\n"}
{" "}
<span className="text-orange-300">messages</span>
<span className="text-neutral-300">=</span>
<span className="text-neutral-300">[</span>
<span className="text-neutral-300">{"{"}</span>
<span className="text-emerald-300">&quot;role&quot;</span>
<span className="text-neutral-300">:</span>{" "}
<span className="text-emerald-300">&quot;user&quot;</span>
<span className="text-neutral-300">,</span>{" "}
<span className="text-emerald-300">&quot;content&quot;</span>
<span className="text-neutral-300">:</span>{" "}
<span className="text-emerald-300">&quot;Hello!&quot;</span>
<span className="text-neutral-300">{"}"}</span>
<span className="text-neutral-300">]</span>
{"\n"}
<span className="text-neutral-300">)</span>
</code>
</pre>
</div>
</div>
</div>
</div>
</section>
{/* Integrations Section */}
<section className="py-24 border-b border-neutral-800/50 relative">
<div className="absolute inset-0 bg-[radial-gradient(ellipse_50%_50%_at_50%_50%,rgba(16,185,129,0.03),transparent)]" />
<div className="relative max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
<div className="text-center mb-16">
<div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-neutral-700 bg-neutral-800/30 text-neutral-400 text-sm mb-6">
<Link2 className="w-4 h-4" />
<span>Integrations</span>
</div>
<h2 className="text-3xl sm:text-4xl font-bold mb-4">
Works with your stack
</h2>
<p className="text-lg text-neutral-400 max-w-2xl mx-auto">
First-class support for the most popular AI frameworks. Drop in and start tracing.
</p>
</div>
<div className="grid sm:grid-cols-3 gap-6 max-w-3xl mx-auto">
{/* OpenAI */}
<div className="group flex flex-col items-center p-8 rounded-2xl border border-neutral-800/50 bg-neutral-900/30 hover:border-emerald-500/20 transition-all duration-300">
<div className="w-16 h-16 rounded-2xl bg-neutral-800/80 border border-neutral-700/50 flex items-center justify-center mb-5 group-hover:border-emerald-500/30 transition-colors duration-300">
<Cpu className="w-8 h-8 text-neutral-300 group-hover:text-emerald-400 transition-colors duration-300" />
</div>
<h3 className="text-lg font-semibold mb-1">OpenAI</h3>
<p className="text-sm text-neutral-500">GPT-4, GPT-3.5, o1</p>
<span className="mt-3 text-xs font-medium px-3 py-1 rounded-full bg-emerald-500/10 text-emerald-400 border border-emerald-500/20">
wrap_openai()
</span>
</div>
{/* LangChain */}
<div className="group flex flex-col items-center p-8 rounded-2xl border border-neutral-800/50 bg-neutral-900/30 hover:border-emerald-500/20 transition-all duration-300">
<div className="w-16 h-16 rounded-2xl bg-neutral-800/80 border border-neutral-700/50 flex items-center justify-center mb-5 group-hover:border-emerald-500/30 transition-colors duration-300">
<GitBranch className="w-8 h-8 text-neutral-300 group-hover:text-emerald-400 transition-colors duration-300" />
</div>
<h3 className="text-lg font-semibold mb-1">LangChain</h3>
<p className="text-sm text-neutral-500">Chains, Agents, Tools</p>
<span className="mt-3 text-xs font-medium px-3 py-1 rounded-full bg-emerald-500/10 text-emerald-400 border border-emerald-500/20">
Auto-instrumented
</span>
</div>
{/* Custom Agents */}
<div className="group flex flex-col items-center p-8 rounded-2xl border border-neutral-800/50 bg-neutral-900/30 hover:border-emerald-500/20 transition-all duration-300">
<div className="w-16 h-16 rounded-2xl bg-neutral-800/80 border border-neutral-700/50 flex items-center justify-center mb-5 group-hover:border-emerald-500/30 transition-colors duration-300">
<Bot className="w-8 h-8 text-neutral-300 group-hover:text-emerald-400 transition-colors duration-300" />
</div>
<h3 className="text-lg font-semibold mb-1">Custom Agents</h3>
<p className="text-sm text-neutral-500">Any Python agent</p>
<span className="mt-3 text-xs font-medium px-3 py-1 rounded-full bg-emerald-500/10 text-emerald-400 border border-emerald-500/20">
@trace decorator
</span>
</div>
</div> </div>
</div> </div>
</section> </section>
@@ -203,7 +497,7 @@ export default function HomePage() {
</div> </div>
<div className="text-sm text-neutral-500"> <div className="text-sm text-neutral-500">
MIT License © 2026 Vectry MIT License &copy; 2026 Vectry
</div> </div>
</div> </div>
</div> </div>

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# AgentLens Python SDK # AgentLens Python SDK
AgentLens provides observability for AI agents by tracing decisions, not just API calls. [![PyPI version](https://img.shields.io/pypi/v/vectry-agentlens)](https://pypi.org/project/vectry-agentlens/)
[![Python 3.9+](https://img.shields.io/badge/python-3.9%2B-blue)](https://www.python.org/downloads/)
[![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)
## Installation Agent observability that traces **decisions**, not just API calls.
```bash ## What is AgentLens?
pip install agentlens
``` AgentLens is an observability SDK for AI agents. Unlike generic LLM tracing tools that only capture request/response pairs, AgentLens captures the **decision points** your agent makes: which tool it chose, what alternatives it considered, and why. This gives you a decision tree view of agent behavior, not just a flat log of API calls.
## Quick Start ## Quick Start
```python ```bash
from agentlens import init, trace pip install vectry-agentlens
# Initialize AgentLens
init(api_key="your-api-key", endpoint="https://agentlens.vectry.tech")
# Trace your agent functions
@trace(name="research-agent")
async def research(topic: str) -> str:
return f"Researching: {topic}"
``` ```
## Features ```python
import agentlens
- **Decision Tracing**: Log and visualize agent decisions with alternatives # Initialize once at startup
- **Context Awareness**: Monitor context window utilization agentlens.init(api_key="your-api-key")
- **Cost Intelligence**: Track token usage and costs per operation
- **Integrations**: Native support for LangChain and OpenAI
## Documentation # Trace any function with a decorator
@agentlens.trace(name="research-agent", tags=["research"])
def research(topic: str) -> str:
# Your agent logic here
return f"Results for: {topic}"
Full documentation available at [https://agentlens.vectry.tech/docs](https://agentlens.vectry.tech/docs) research("quantum computing")
```
The `@trace` decorator works with both sync and async functions. Traces are batched and sent to the AgentLens API automatically.
You can also use `trace` as a context manager:
```python
with agentlens.trace(name="my-operation", session_id="user-123"):
# Everything inside is traced
result = do_work()
```
## Integrations
### OpenAI
Auto-capture every `chat.completions.create` call with token counts, cost estimation, and tool-call decisions.
```bash
pip install vectry-agentlens[openai]
```
```python
import openai
import agentlens
from agentlens.integrations.openai import wrap_openai
agentlens.init(api_key="your-api-key")
client = openai.OpenAI()
client = wrap_openai(client)
# All calls are now traced automatically
@agentlens.trace(name="assistant")
def ask(question: str) -> str:
response = client.chat.completions.create(
model="gpt-4o",
messages=[{"role": "user", "content": question}],
)
return response.choices[0].message.content
ask("What is the capital of France?")
```
`wrap_openai` instruments the client in-place. For each call it creates an LLM span with:
- Model name, temperature, and max_tokens
- Token usage (prompt, completion, total)
- Estimated cost in USD (built-in pricing for GPT-4, GPT-4o, GPT-3.5-turbo variants)
- Automatic `TOOL_SELECTION` decision points when the model invokes function/tool calls
Streaming is also supported transparently.
### LangChain
Drop in a callback handler to trace chains, agents, LLM calls, and tool invocations.
```bash
pip install vectry-agentlens[langchain]
```
```python
import agentlens
from agentlens.integrations.langchain import AgentLensCallbackHandler
agentlens.init(api_key="your-api-key")
handler = AgentLensCallbackHandler(
trace_name="langchain-agent",
tags=["production"],
session_id="user-456",
)
# Pass the handler to any LangChain chain or agent
result = chain.invoke(
{"input": "Summarize this document"},
config={"callbacks": [handler]},
)
```
The handler automatically creates spans for LLM calls, tool calls, and chain execution. Agent tool selections are logged as `TOOL_SELECTION` decision points.
It also works inside an existing trace context:
```python
@agentlens.trace(name="my-pipeline")
def run_pipeline(query: str):
handler = AgentLensCallbackHandler()
return chain.invoke({"input": query}, config={"callbacks": [handler]})
```
### Custom Agents
For any agent framework (or your own), use `log_decision()` to record decision points manually.
```python
import agentlens
from agentlens import log_decision
agentlens.init(api_key="your-api-key")
@agentlens.trace(name="routing-agent")
def route_request(query: str) -> str:
# Your routing logic
chosen_agent = "research-agent"
log_decision(
type="ROUTING",
chosen={"name": chosen_agent, "confidence": 0.92},
alternatives=[
{"name": "support-agent", "confidence": 0.45, "reason_rejected": "not a support query"},
{"name": "sales-agent", "confidence": 0.12, "reason_rejected": "no purchase intent"},
],
reasoning="Query contains research keywords",
context_snapshot={"tokens_used": 1200, "tokens_available": 6800},
cost_usd=0.003,
duration_ms=45,
)
return dispatch(chosen_agent, query)
```
Decision types include: `TOOL_SELECTION`, `ROUTING`, `RETRY`, `ESCALATION`, `MEMORY_RETRIEVAL`, `PLANNING`, and `CUSTOM`.
## API Reference
### `agentlens.init()`
Initialize the SDK. Call once at application startup.
```python
agentlens.init(
api_key="your-api-key", # Required. Your AgentLens API key.
endpoint="https://...", # API endpoint (default: https://agentlens.vectry.tech)
flush_interval=5.0, # Seconds between batch flushes (default: 5.0)
max_batch_size=10, # Traces per batch before auto-flush (default: 10)
enabled=True, # Set False to disable sending (e.g., in tests)
)
```
### `agentlens.trace()`
Decorator or context manager that creates a trace (or a nested span if already inside a trace).
```python
# As decorator
@agentlens.trace(name="my-agent", tags=["v2"], session_id="user-789", metadata={"env": "prod"})
def my_agent():
...
# As context manager
with agentlens.trace(name="sub-task") as ctx:
...
```
| Parameter | Type | Description |
|-------------|------------------|--------------------------------------|
| `name` | `str` | Name for the trace or span |
| `tags` | `list[str]` | Tags for filtering in the dashboard |
| `session_id`| `str` | Group traces by user session |
| `metadata` | `dict` | Arbitrary key-value metadata |
### `agentlens.log_decision()`
Record a decision point inside an active trace.
```python
agentlens.log_decision(
type="TOOL_SELECTION",
chosen={"name": "search", "confidence": 0.95},
alternatives=[{"name": "calculator", "confidence": 0.3}],
reasoning="User asked a factual question",
context_snapshot={"tokens_used": 500},
cost_usd=0.001,
duration_ms=23,
)
```
| Parameter | Type | Description |
|-------------------|--------------|------------------------------------------------|
| `type` | `str` | Decision type (see types above) |
| `chosen` | `dict` | The selected option (`name`, `confidence`, etc.) |
| `alternatives` | `list[dict]` | Rejected options with reasons |
| `reasoning` | `str` | Why this option was chosen |
| `context_snapshot`| `dict` | State at decision time (tokens, memory, etc.) |
| `cost_usd` | `float` | Cost of this decision in USD |
| `duration_ms` | `int` | Time taken to make the decision |
### `wrap_openai()`
Instrument an OpenAI client for automatic tracing.
```python
from agentlens.integrations.openai import wrap_openai
client = wrap_openai(openai.OpenAI())
```
Returns the same client instance with `chat.completions.create` wrapped. All calls automatically generate LLM spans and tool-call decision points.
### `AgentLensCallbackHandler`
LangChain callback handler for automatic tracing.
```python
from agentlens.integrations.langchain import AgentLensCallbackHandler
handler = AgentLensCallbackHandler(
trace_name="my-chain", # Trace name (if no active trace exists)
tags=["prod"], # Optional tags
session_id="user-123", # Optional session ID
)
```
## Architecture
```
Your Agent Code
│
▼
AgentLens SDK ── @trace, log_decision(), wrap_openai()
│
▼
Batched HTTP Transport ── Collects traces, flushes every 5s or 10 traces
│
▼
AgentLens API ── https://agentlens.vectry.tech/api/traces
│
▼
Dashboard ── Decision trees, analytics, real-time streaming
```
The SDK is lightweight and non-blocking. Traces are serialized and batched in a background thread, so your agent code is never slowed down by observability.
## Dashboard
View your traces at [agentlens.vectry.tech](https://agentlens.vectry.tech):
- **Decision Trees** - Visualize the full decision path of every agent run
- **Analytics** - Token usage, cost breakdowns, latency percentiles
- **Real-time Streaming** - Watch agent decisions as they happen
- **Session Grouping** - Track multi-turn conversations by session ID
## Development
```bash
cd packages/sdk-python
pip install -e ".[all]" # installs openai + langchain extras
python -m pytest tests/ -v
```
## License ## License
MIT © 2026 Vectry MIT - Built by [Vectry](https://vectry.tech)

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[build-system] [build-system]
requires = ["hatchling"] requires = ["hatchling"]
build-backend = "hatchling.backends" build-backend = "hatchling.build"
[project] [project]
name = "agentlens" name = "vectry-agentlens"
version = "0.1.0" version = "0.1.0"
description = "Agent observability that traces decisions, not just API calls" description = "Agent observability that traces decisions, not just API calls"
readme = "README.md" readme = "README.md"
@@ -25,7 +25,10 @@ dependencies = [
[project.optional-dependencies] [project.optional-dependencies]
langchain = ["langchain-core>=0.1.0"] langchain = ["langchain-core>=0.1.0"]
openai = ["openai>=1.0.0"] openai = ["openai>=1.0.0"]
all = ["agentlens[langchain,openai]"] all = ["vectry-agentlens[langchain,openai]"]
[tool.hatch.build.targets.wheel]
packages = ["agentlens"]
[project.urls] [project.urls]
Homepage = "https://agentlens.vectry.tech" Homepage = "https://agentlens.vectry.tech"