The Classifier Agent: Creating A Self-Improving Secret Detection Loop

user profileexternal writer image
Data Scientist, Security Analyst

Every secret scanner produces a pile of detections it can’t fully categorize. They get labeled as “generic”: high-entropy strings that look like secrets but don’t match any known provider pattern. For security teams, this label is the most difficult to handle. The gap between “We found something” and “We know what it is” gets bridged by hours of manual triage.

Closing that gap used to require manual research and constant fine-tuning of static-detection logic – a process with weeks of lead time. That model is obsolete in the AI era, where code and embedded secrets ship at machine speed, requiring a system that evolves as fast as the threats themselves.

So we rebuilt the loop. Cycode’s new Classifier Agent is an agentic system that continuously analyzes generic detections, identifies its own coverage gaps, drafts the detectors to close them, and routes those drafts to a human reviewer on a recurring cadence. The result for security teams: less noise and faster coverage of new secret types.

Every secret scanner produces a pile of detections it can’t fully categorize. They get labeled as “generic”: high-entropy strings that look like secrets but don’t match any known provider pattern. For security teams, this label is the most difficult to handle. The gap between “We found something” and “We know what it is” gets bridged by hours of manual triage.

Closing that gap used to require manual research and constant fine-tuning of static-detection logic – a process with weeks of lead time. That model is obsolete in the AI era, where code and embedded secrets ship at machine speed, requiring a system that evolves as fast as the threats themselves.

So we rebuilt the loop. Cycode’s new Classifier Agent is an agentic system that continuously analyzes generic detections, identifies its own coverage gaps, drafts the detectors to close them, and routes those drafts to a human reviewer on a recurring cadence. The result for security teams: less noise and faster coverage of new secret types. 

The Self-Evolving Loop

In the traditional security model, organizations are often at the mercy of a vendor’s manual update cycle. When new risk patterns emerge – such as new cloud providers, AI APIs, or internal tooling – security teams are left with “generic” detections that require manual triage until a static rule is eventually released. In the meantime, those secrets remain hidden in the generic bucket.

Cycode has mitigated that delay and replaced that friction with a unified Classifier Agent architecture. By treating detection and improvement as a single, continuous motion, the system identifies its own gaps, drafts the necessary policy refinements, and routes them for human review in real time.

The breakthrough isn’t in any one component – it’s in the way the entire engine now sharpens itself as it works. 

Here’s how that loop comes together:

  1. Periodic batch classification. On a scheduled cadence, the agent pulls the latest cohort of generic detections from a high volume of repos and sorts each one into one of three buckets:
  • Existing detector fixes – secrets that match a known provider but slipped past the existing detectors. The agent drafts a refined detector that automatically closes the gap.
  • New provider candidates – clusters of structurally similar secrets from sources we don’t yet have dedicated coverage for. The agent groups them, infers the provider, and drafts a new detector that will be reviewed by our security analyst.
  • Noise – The agent identifies non-sensitive data, such as random GUIDs, test credentials, and placeholders, and labels them as non-secrets. Our new architecture effectively slashes detection noise by nearly 70%, filtering out false positives and preventing alert fatigue.
  1. Human-in-the-loop review. Every drafted detector – whether a refinement to an existing or a brand-new provider rule – flows through the same review path as any other detector change at Cycode. Security analysts conduct research and approve, reject, or refine before anything ships to customer environments. The agent accelerates the work – it doesn’t bypass the safeguards.
  2. Closed-loop learning. Approved detectors feed back into the next classification cycle. Detections that previously landed in the generic bucket now resolve cleanly into their correct category, freeing the agent to focus on the next layer of unknowns. Coverage sharpens with every run.

What the Loop Surfaced

In practice, the agent navigated thousands of public generic detections to uncover a wealth of new variants and fresh providers for our policies, while effortlessly filtering out look-alikes as noise. On its very first iteration, the agent increased the total number of covered detectors by 19%. In addition, 30% of our existing detectors were updated and refined based on the agent’s direct suggestions.

And for every finding, it didn’t just raise the flag. It handed us the upgrade.

What used to take weeks of head-down triage now takes only moments. Every time a new batch of public generic detections is released, the Classifier Agent steps in, sorts signals from noise, drafts the next round of detectors, and pushes them through review. Coverage broadens. Noise quiets. The system improves itself. This reflects a broader pattern across our platform: detection systems that learn from their own output rather than waiting for the next manual rule update.

How We Built the Foundation

The agent is the headline, but it only works because of the work underneath it. Achieving this meaningful improvement required overhauling every stage of our pipeline, from data collection to model learning.

1. Modern Architecture & Scaled Data

We migrated to a state-of-the-art, high-capacity model architecture. To fuel the new engine, we significantly expanded our training footprint, more than tripling the volume of repositories used for data collection. This massive increase in diversity ensures the model understands security context across thousands of different coding styles.

2. High-Fidelity AI Annotation

A model is only as good as its labels. We built a sophisticated annotation pipeline using advanced Large Language Models to act as Security Experts. These LLMs analyzed tens of thousands of suspicious code snippets, generating a massive, highly accurate dataset. This high-quality ground truth was essential for training our modern architecture. By implementing explicit “Do NOT flag” rules for things like ports, placeholders, and dummy variables, we taught the model to prioritize actual credentials over structural noise.

3. Smarter Training & Partitioning Logic

To ensure our results are grounded in reality, we redesigned our data partitioning logic. We implemented Anti-Leakage splitting, preventing the model from memorizing specific strings and forcing it to learn the actual logic of what makes a secret look like a secret.

The Bottom Line

For security teams, the practical impact of this self-improving loop is straightforward:

  • Less alert fatigue: A ~70% reduction in noise means your team spends time on real credentials, not GUIDs and placeholders.
  • Faster coverage for new secret types: New provider patterns get drafted by the agent on a recurring cadence, eliminating the traditional engineering backlog.
  • No stone unturned: While we’ve expanded our ability to tag specific providers for faster remediation, we continue to fully support generic secret detection. Not every secret has a brand, and combining specific tagging with robust generic detection ensures you always have the full picture.

By combining a more powerful model architecture with a Classifier Agent that continuously discovers its own gaps, we are providing a detection engine that gets sharper every single day. Welcome to the new era of secret security.

A Note on Data Privacy

As security professionals, we’re often asked about the source of our training data. At Cycode, we never use customer data to train our AI models. All training, annotation, and testing data are sourced exclusively from public integrations and open-source repositories.