Use case · Secure vibe coding

Every feature now starts as a prompt. Security has to start there too.

Vibe coding moves at the speed of a prompt. Reykur sits inside the agent loop and reviews every plan against your threat model before a single line of code is written.

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Watch a session

Works with Claude Code · Codex · Cursor and other major coding agents

One real session

A flaw caught before the code is written.

One prompt, one plan, one interjection. The whole review happens inside the agent loop, in seconds.

agent session · billing-portalWaiting for promptAgent planningReykur reviewingPlan revisingApproved

Add SSO to the billing portalDrafting a plan…1. Add OIDC provider config2. Wire callback route3. Store session token, signed HS256

Reykur · 7 requirements from your threat model

CritSign session tokens with RS256, never HS256ASVS 3.5.2

HighValidate the OIDC state parameterASVS 51.2.1

HighBind the session cookie to SameSite and SecureASVS 3.4.1

+ 4 more, scoped to this task

Revising the plan…3. Store session token, signed RS2564. Set cookie SameSite=Strict; Secure5. Validate state + ID token issuer

Plan approved · 0 open requirements · the agent writes secure code from here

The same flaw, two lives

Caught in the plan, it costs ~30 seconds.

Caught in production, the same flaw means a rewrite, a second review and weeks of lost time. Sometimes worse.

Without a reviewer in the looptotal: ~4 weeks

Minute 0PromptAgent plans, HS256 flaw inside

Hour 2MergedFlaw is now code, tests pass

Day 1DeployedForgeable session tokens in prod

Week 3Pen-test findingCritical: auth bypass

Week 4Rewrite & re-reviewKey rotation, forced re-login, a week lost

With Reykur in the looptotal: + ~30 seconds

Minute 0PromptAgent plans, HS256 flaw inside

+ ~30 secondsReykur interjectsRequirement injected, plan corrected before any code

Hour 2Merged cleanRS256, state validated, cookies bound

Day 1Deployed ✓Nothing to find three weeks later

Not generic AI advice

Every requirement has a paper trail.

Nothing is invented in the moment. Each interjection traces from a threat in your model, through a deterministic control library, into the plan the agent executes.

Threat · your modelSession token forgeryFrom the living threat model Reykur keeps for your product.

Control · libraryASVS 3.5.2: asymmetric token signingCurated libraries built on OWASP ASVS, SOC 2 and more. 300+ requirements.

Requirement · in the plan“Sign session tokens with RS256”Risk-based mapping surfaces only what matters for this change. Seven, not 300+.

Shipped · on recordSecure and compliant, by designThe feature ships with every requirement addressed and the decision trail stored for audit.

How it fits the threat model

New product · no model yetThe plan becomes the first model.Components, data and boundaries are read out of the agent's plan into a first threat model, and the review runs against that from the very first prompt.

Existing product · new featureThe plan updates the model.Whatever the plan changes about the product, a new component, a new flow, a moved boundary, is written back into the threat model. The integration reads the model and enriches it. It never works from a stale copy.

For security teams

See the risks that matter, and skip the noise.

Every plan the team ships is stored and searchable: what was built, which risks it carried and how each one was mitigated. Posture you can measure.

Example: one team, one month

4critical flaws stopped before code

17high flaws stopped before code

312plans reviewed

Vibe coding is not the risk.Doing it without a threat model is.

Live in under 2 minutes: one token, one install. Your agents keep shipping while your threat model starts reviewing.

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Continuous threat modeling

From the user story, into the ticket, verified at the PR.

Explore Traditional threat modeling

Run a design review on a collaborative canvas, without it dying on a whiteboard.

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