The situation
The problem addressed, the context, the people involved and the known constraints.
Cortex · Continuity for your AI tools Start with Codex.
Start with Codex.
Continue with Claude.
Your work does not start over.
Cortex connects the work you carry out in your AI tools. It preserves the trajectory of situations, decisions and their outcomes, then prepares the context useful for what comes next.
The model can change. The experience stays in your environment.
Beyond history
A session keeps messages. It does not keep the experience.
A history can be re-read. A file can be found again.
But resuming work requires something else: knowing what had been understood, why a decision was made, what has changed since and what remains to be resolved.
Cortex maintains that trajectory across your sessions and your tools.
A trajectory, not a copy of the chat
Each step stays tied to what gives it meaning.
The hypotheses
What you believed true, what remained uncertain and what still had to be verified.
The decisions
The conclusion retained, the elements supporting it and the options set aside.
The outcomes
What actually happened after the decision and what that experience allows to revisit.
At the next session, Cortex does not return the whole history. It prepares the material relevant to the present situation.
In your usual tools
You keep working as you do today.
Cortex does not impose a new chat. It sits beneath the applications and terminals you already use.
Codex 
Claude + nothing changes here → freeze the contractor access scope
→ rollout in two waves
↩ resumed: SSO does not cover externals
Cortex beneath your applications · on your machine Workspace · Product Subject · Contractor access
An organisation that follows the work
Cortex files things without asking you to file everything.
The Workspace defines the boundary of your environment: a company, a product, a client or an activity.
Inside it, Cortex first looks for continuity with existing Subjects. When a new trajectory appears, it can create one. When material is still missing, it waits rather than forcing a wrong classification.
- create a Subject
- explicitly choose where to attach a piece of work
- rename
- move
- correct Cortex
Customisation remains possible. It is no longer required for it to work.
Workspace · Product Billing12 sessions · 4 decisions Onboarding7 sessions · 2 decisions Access migrationnew trajectory detected
1 item pending · not enough material to decide
The engine can change
Your experience does not change owner.
Codex may be the best tool for one step. Claude may suit the next. Another provider may replace them tomorrow. Cortex stays beneath these engines.
Start in Codex
Work in the application or terminal you already know.
Resume in Claude
Continue with the trajectory, the decisions and the open points.
Switch provider
Your environment does not start over because the engine changed.
Cortex does not ask the model to own your experience. It prepares, for each situation, the part of past work that can genuinely serve now.
Retrieving is not enough
The proximity of a text does not decide its relevance.
A RAG can retrieve a document or a passage close to a request.
Semantic search proposes candidates. It does not decide alone what comes back into context.
Cortex must also know
whether the information is still validin what context it was establishedwhether it has been contradicted sincewhether it genuinely applies to the present situationwhether it should still be able to influence a decision
The past does not become an eternal rule
What is no longer true does not keep deciding.
Information may have been correct six months ago and no longer be so today. An experience may be useful in one team and inapplicable in another. A conclusion may be reinforced, limited, challenged or revoked.
Scope · Product team Conclusion
SSO covers contractor access.
revisedExternals remain outside the SSO scope.
established 6 months ago today
- 01
Provenance
A conclusion stays linked to the situations and evidence that produced it.
- 02
Temporality
The former state is not confused with the current one.
- 03
Scope
A learning stays limited to the context in which it was established.
- 04
Revision
What is no longer valid can lose its influence without being erased.
Cortex preserves the history without automatically granting every old piece of information the right to influence the present.
Beyond the chat boundaries
One piece of work can span several days and several tools.
A technical session is a constraint of the model. It is not necessarily the right unit for understanding your work.
Cortex connects the sessions that belong to a single trajectory.
Without manually rebuilding everything that had already been established.
interrupt a piece of workswitch toolcome back several days laterresume with another model
Not one more chat
Cortex does not replace your AI tools. It gives them continuity.
You keep writing in Codex, Claude or compatible tools. Cortex operates beneath the surface.
What you see · your usual tool
capture the trajectoryattach the work to its environmentbuild the continuity elementsprepare the context of the next exchangepreserve provenance and revisions
You do not have to manage technical sessions, workers or the graph.
Your environment stays yours
Your experience stays under your control.
Cortex runs on your machine. Your Workspaces, Subjects, trajectories, decisions and persistent states stay stored locally.
Local storage is not presented as necessarily local inference. The boundary stays explicit.
Stays on your machine
Workspaces & Subjectsthe boundary of your environment
Trajectories & decisionswith their reasons and evidence
Persistent statesrevisable, never erased
what is prepared for the work in progress
Sent to the selected engine Only the material prepared for the situation. The provider does not own your experience.
Independent of the model
You do not lose everything when you change tool.
Your work trajectories
The problems addressed, the steps crossed and the points still open.
Your decisions
The conclusions and the reasons that supported them.
Your outcomes
What actually worked, failed or required a correction.
Your governance rules
What can be mobilised, what must be verified and what must no longer influence the present.
Your freedom to choose the engine
The experience stays in Cortex, not in the provider used that day.
Learning from real work
An agent should be different after having worked with you.
Accumulating conversations is not learning. Cortex is designed to connect a situation, a decision, an action and its outcome, so that this experience can change how a future situation is approached.
The goal is simple: after several months in your environment, an agent should no longer work exactly as on day one.
Try Cortex in your work
Carry the experience forward, not just the files.
Install Cortex, choose your Workspace and connect the AI tools you already use. Start in one. Resume in the other. Cortex maintains the trajectory.
Priority access
Get priority access to Cortex.
The beta opens progressively. Just leave your address to be notified when a new access wave becomes available.
Your request has been registered.
We will let you know when a new wave of access to Cortex opens.