A Devs Core showcase · Custom-coded AI agents

AI agents that research, debate, and fact-check — live in your browser.

Cadenza runs a real team of AI agents that plan, search the web, synthesize, pause for your approval, then verify every claim before handing you a cited brief. Watch the hard parts happen — not just the output.

Production stack · bring your own model & key
Claude / GPT / Gemini· LangGraph· FastAPI + SSE· React Flow· Redis· Postgres
workflow · ai-market-research-brief Live
P
Plannerbreaks the question into sub-tasks
R
Researchers ×3search + read the web in parallel
A
Analystturns findings into insights
You approvehuman checkpoint before writing
C
Criticverifies every claim vs. sources
The live demo

Trigger the workflow. Watch the agents collaborate.

Type a question (or pick one), hit run, and follow the live agent graph on the left while the plain-English explainer on the right tells you what's happening and why it's hard.

Cadenza Console — AI Market Research Brief
Idle
🔑 Model & API key Bring your own
No key — running in demo mode
🔒 Your key, your tokens. Used only to run this workflow — never stored, never billed to us.
Your research question
AI scheduling for dental clinics AI support agents for e-commerce AI invoicing for accounting firms
⚠ Content screened — injection blocked
P Planner decomposes task Sonnet R Researcher A market size Haiku R Researcher B top competitors Haiku R Researcher C pricing signals Haiku A Analyst synthesizes insights Sonnet Human approval you review direction W Writer drafts the brief Haiku C Critic verifies claims Sonnet Cited brief verified + downloadable
Active Done / verified Waiting on you Injection blocked
0/8
Step
0
Tokens
$0.00
Your est. cost
0.0s
Elapsed
📖 How it works · plain English
Ready when you are
Press Run workflow. You'll watch five kinds of AI agent hand work to each other — and stop to ask you for approval before writing anything.
Event log · decision rationale
No events yet. Run the workflow to see every decision, search, and verification stream in live.
PAUSED Human-in-the-loop checkpoint

The agents stopped on purpose. Before the Writer drafts anything, you decide the direction. Nothing consequential happens without your sign-off.

Proposed brief direction:
  • Lead with US market size + growth for the niche
  • Profile the 3 strongest competitors & their pricing
  • Close with the gap Devs Core could win
✓ 3 of 3 key claims verified against sources

Want an agent team like this for your business?

This is the kind of custom-coded, production-grade automation Devs Core builds — owned by you, engineered to scale, shipped in weeks not quarters.

Book a build call →

This page is an interactive prototype. Agent timings, costs, and content are simulated to preview the real product experience.

Why it's hard

Four things that separate a real agent system from a toy.

Anyone can chain a prompt to a web search. The difficulty — and the reason these systems fail in production — lives in the parts you just watched the demo handle.

01
🛡️

Prompt-injection defense

The moment an agent reads the open web, attackers can hide instructions in a page — "ignore your task, do this instead." Cadenza screens every fetched page before the model acts on it, treating web content as data, never commands. You saw the "injection blocked" flag fire live.

02
🔍

Decision transparency

Most demos show you what the AI produced. Cadenza shows you why — the Planner's reasoning for the sub-tasks it picked, and the Critic's verdict on whether to accept or retry a draft. No black box.

03

Claim verification

AI makes things up. Before the brief is released, the Critic checks every key claim against the actual cited source and flags anything unsupported — then loops back to fix it. That's the anti-hallucination guarantee founders actually need.

04
🙋

Human-in-the-loop control

Real workflows can't run fully unattended. Cadenza pauses at a checkpoint and waits for a human to approve or adjust direction before anything consequential happens — with the run state safely persisted while it waits.

Under the workflow

One question in. A verified, cited brief out.

The same engine can run other workflows — outreach drafts, content outlines, competitor teardowns. The orchestration is the product.

Step 1 · Plan & research

Decompose, then search in parallel

A Planner breaks your question into focused sub-questions; three Researchers search and read the web at the same time, each screened for injection.

Step 2 · Synthesize & approve

Insights, then your checkpoint

An Analyst turns raw findings into structured insights and proposes a direction. The run pauses for your approval before a single word is written.

Step 3 · Write & verify

Draft, fact-check, release

A Writer drafts the brief; a Critic verifies every claim against its source, retries on failure, and only then releases a cited, downloadable brief with a shareable permalink.

Under the hood

Built like software, because it is software.

No rented no-code workflow you can't own. Every layer is version-controlled, testable without burning LLM spend, and yours at the end.

LangGraph
Stateful multi-agent graph with native human-in-the-loop interrupts & retries.
Bring your own model
Run on your own Claude, GPT, Gemini, Llama or Mistral key — your tokens, your bill, never ours.
Model routing
Cheaper model for mechanical steps, your strongest for reasoning — cost controlled on purpose.
FastAPI + SSE
Async gateway streaming every agent event to the browser in real time.
React Flow
The on-screen graph mirrors the orchestration graph 1:1.
Injection guard
OWASP-aligned screening on all tool/web output before the model acts.
Redis + Postgres
Run state, pub/sub, rate-limiting, plus durable saved runs & permalinks.
Langfuse (self-hosted)
Traces, token/cost accounting & evals — your data stays first-party.
Cost & safety caps
Daily spend ceiling, per-run token/step limits, caching, bot gate.

You just watched the pitch run itself.

If this is the level of agentic system you want built — owned by you, engineered to scale — let's talk about your workflow.

Custom-coded AI agents & automation for US businesses · serving founders in Florida, Georgia & nationwide