Agentic AI Is Finally Useful: The New Stack We Actually Use For Clients

Most teams still think “AI agent” means a chatbot that hits a context limit and gives up.

That era is over.

A new stack of specialist models is quietly turning deep research and coding into industrial-grade workflows. As an AI agency, this is the toolbox that actually moves the needle for clients, not another “smart assistant” bolted onto a dashboard.

Here is how the modern agent stack is evolving - and how we use it.

1. Deep research that behaves like a researcher, not a parrot

Traditional LLM search flows:

User asks question → model searches a bit → spits out a pretty summary → half the claims are unverifiable.

New wave: models like DR Tulu are trained specifically for deep research:

• Starts by drafting a search plan
• Uses tools to search, browse, and gather sources
• Builds a structured, citation-rich report
• Every claim is tied back to a traceable reference

On benchmarks like ScholarQA and medical-style question sets, DR Tulu-level systems are matching or beating closed deep-research agents, despite being smaller and cheaper. That matters for us because:

• We can run targeted, domain-specific research for clients
• We can show every source and every step
• We can tune the depth to the actual business question, not overkill everything

Result: research outputs that you can send to a board deck or an investor without praying no one checks the links.

2. Search that writes the deliverable while you explore

Search is also mutating into a full workbench.

Recent updates from tools in the Perplexity class now let users:

• Search the live web
• Get structured, cited answers
• And directly edit slides, sheets, and docs inside the same interface

For an agency, that means:

• Strategy docs built as we research
• Competitive analyses that land as polished decks, not raw notes
• Less context switching between “research” and “creation”

This is where we plug in: we design the workflows, prompts, and templates that turn that environment into repeatable assets for marketing, sales, ops, or product.

3. Coding agents that can actually own a task

On the build side, new models like Claude Opus 4.5 plus agentic dev tools are finally making “AI as junior engineer” real:

• Better code generation, refactors, and migrations with fewer tokens
• An “effort” parameter to trade speed vs depth
• Large-context workflows for multi-step tasks
• Tool use that breaks fewer flows and survives longer chains

Layer that with environments like Jules-style dev agents, where you can:

• Spin up projects without a repo
• Upload context files, mocks, or specs
• Let the agent plan, code, and test asynchronously
• Wire it into CLI or CI so tasks run in the background

For clients, we use this stack to:

• Bootstrap internal tools and prototypes
• Automate boring integration work
• Migrate or refactor legacy systems faster than a human-only team
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4. Code review that actually understands your entire codebase

Code reviewers used to die at the 100-file mark.

Systems like Greptile flip that:

• Build a code graph across millions of lines
• Understand cross-file logic, dependencies, and security issues
• Catch 3x more bugs than typical AI reviewers
• Slash merge times from “full-day slog” to “under 2 hours”

In practice, that means:

• We can drop into a client’s repo and ramp almost instantly
• We get automated review on style, security, and architecture issues
• Teams can ship faster without playing merge ping-pong for a week

This is where AI goes from “assistant” to “second pair of eyes that never sleeps.”

5. Modular tools instead of bloated prompts

One of the biggest unlocks: treating tools as clean code modules instead of stuffing every detail into the context window.

Approaches like modular code packages for agents let us:

• Wrap capabilities (APIs, databases, internal tools) as reusable modules
• Call them on demand, not preload them into every conversation
• Manage state and tool use like a proper backend, not prompt soup

The result is:

• Less hallucination
• More predictable flows
• Systems that scale across projects and teams

What this means if you work with an AI agency

Working with us is no longer “let’s add a chatbot.” It is:

• Deep research flows that produce board-ready outputs with receipts
• Coding agents that build, refactor, and integrate reliably
• Code review systems that understand the entire repo, not one file
• Modular tool stacks that are maintainable instead of brittle

If your AI roadmap still revolves around “a bot on the website,” you are 18 months behind.

The game now is orchestration: stacking the right specialists into one coherent pipeline.