Get started with AgentPrompt in minutes

Step 1 — paste your prompt versions

Open AgentPrompt and paste prompt version A and version B. They can be system prompts, task prompts, or any instruction text. AgentPrompt compares them without you re-reading both in full.

Example:

A: "You are a support agent. Always cite a KB article." B: "You are a support agent. Cite a KB article and offer a refund under $20."

Step 2 — pick what to show

Choose Diff (the semantic delta — what behavior changed), Regression (did B drop a guardrail A had?), or Both. The regression check is what tells you the edit weakened the agent, not just that it changed it.

Step 3 — review and gate

Read the behavioral diff and the regression result. If a guardrail was lost, fix version B before it ships — the same discipline as a failing unit test. Attach the result to the change so a teammate can review in seconds.

Step 4 — keep the history

Save the version, roll back a bad edit with one click, and export the history (version + diff + regression result + timestamp) for audit. Re-run on every release, because drift is the default.

An honest limit

AgentPrompt reduces obvious failure modes and makes behavior reproducible. It does not guarantee the agent is safe or compliant, and it is not a legal opinion. Conformity stays the deployer's responsibility across the full system.

Authoritative references

EU AI Act (Reg. 2024/1689): https://eur-lex.europa.eu/eli/reg/2024/1689/oj
AI Act explorer: https://artificialintelligenceact.eu/
OWASP LLM Top 10 (2025): https://owasp.org/www-project-top-10-for-large-language-model-applications/

FAQ

How fast can I get from two prompts to a regression result?

Paste version A and B, pick Regression (or Both), and AgentPrompt returns whether a guardrail present in A was lost in B, with the specific instruction called out.

Do I need to write the diff myself?

No. AgentPrompt renders the semantic delta — what behavior changed — and runs the regression check. You review the result, not the raw text comparison.

Can AgentPrompt roll back a bad edit?

Yes. Every version is saved; you restore a known-good version in one click and can prove why it was good from its diff and regression history.

Does AgentPrompt replace a human reviewer?

No. It makes the change reviewable in seconds; a person still approves the ship. For high-risk uses, human oversight (Art. 14) remains required.

Is AgentPrompt a legal opinion?

No. It is decision-support that helps you version, diff, and regression-test prompts. It is not a legal opinion, a certification, or a guarantee of conformity.

## Disclaimer

Disclaimer (decision-support, not legal advice): AgentPrompt is a tool that helps teams version, diff, and regression-test agent prompts. It is not a legal opinion, a compliance certificate, or a guarantee that an agent is safe or compliant. EU AI Act conformity depends on the full deployed system and is the responsibility of the deploying organization. Verify current obligations and effective dates with qualified counsel before relying on any timeline.

Try AgentPrompt — paste two prompt versions and catch a lost guardrail before it ships — try AgentPrompt.