Can Cursor Handle Customer Code Privacy After Joining SpaceX in 2026? Project Approval Checklist

A customer review fails after a developer shares production secrets and database structure with a cloud agent, even though Privacy Mode is enabled.

Fastest fix: do not approve Cursor for every project at once. Continue with public or low-sensitivity work after checking the current settings and contract; isolate high-sensitivity code, production credentials, and regulated data on a customer-approved local or remote Mac.

Who should use this project approval guide?

You are an independent developer checking whether your account settings satisfy a confidentiality clause.

You lead an outsourcing team and need one rule that can change by customer and project.

You review security or delivery evidence and need screenshots, model details, and data-path records instead of verbal assurances.

Last updated: August 22, 2026. This review was checked against Cursor’s official data-use, security, API key, and Cloud Agents documentation, plus the official announcements about Cursor joining SpaceX and Grok 4.6. Policies and product settings can change, so the current in-product settings and customer contract take priority.

Why Cursor SpaceX customer code privacy cannot have one answer

The announced corporate change does not create a universal “safe” or “unsafe” verdict. Cursor officially announced on August 14, 2026 that it had become part of SpaceX, while SpaceXAI announced Grok 4.6 separately. Cursor’s official material also distinguishes privacy commitments from the way requests, models, and agent environments handle data. Read the Cursor joining SpaceX announcement and the Grok 4.6 announcement as event sources, not as proof that every project has the same data path.

Four statements are often treated as if they mean the same thing:

• The data is not used for model training.
• The request is not retained.
• The request passes through a provider backend.
• The repository or environment is copied into a cloud agent workspace.

They are different controls.

A no-training commitment does not automatically mean no storage. A short-lived request can still be processed by a backend. An API key can change the model billing or authentication path without proving that the editor bypasses Cursor’s own services. A cloud agent can create a separate repository and environment lifecycle even when ordinary inline assistance is configured differently.

Third-party discussion has raised claims about standard Privacy Mode and Grok training. Those claims remain third-party statements. Do not record them as established policy. Use the current Cursor Data Use and Privacy Overview, the Cursor Privacy and Security documentation, the product settings, and the customer’s written requirements.

Approval rule: approve a project-feature combination, not “the editor” as a whole.

Scenario one: public repositories versus customer demos

Public open-source repositories, public documentation, and demonstrations without real business data are usually the easiest projects to approve. The exposure impact is lower because the source is already public or contains synthetic material.

That does not make every session harmless. A developer can paste an unpublished roadmap, a private vulnerability report, a customer email, or a real access token into a conversation while working on public code. The repository classification describes the source tree. It does not classify every prompt, attachment, terminal output, or environment variable.

What you can allow

• Public source code and public issue context.
• Synthetic datasets and disposable demo credentials.
• Inline completion or chat after the current Privacy Mode state is recorded.
• Models whose current retention and provider labels have been checked.
• A limited agent workflow only when the repository contains no confidential material and the customer has no restriction against cloud processing.

What you must block

• Production secrets, even for a quick debugging request.
• Customer names, private incident details, or unreleased product plans.
• Private packages copied from another customer repository.
• Terminal output containing tokens, personal information, or internal hostnames.
• Any model or agent path that the reviewer cannot identify.

Evidence required for release

Keep a screenshot of the current Privacy Mode setting. Record the Cursor client version, selected model, account type, repository classification, and verification date. Store the evidence with the project approval record, not in a developer’s private notes.

Can Cursor still be used for customer private repositories after joining SpaceX? Yes, but the answer depends on the project contract, the enabled features, the selected model, and the documented data path. The corporate announcement alone is not sufficient approval.

Scenario two: private customer repositories with ordinary sensitivity

A normal customer repository needs two checks: contract permission and technical routing. Many teams complete only the second one.

Start with the customer agreement. Look for restrictions on third-party processing, cross-border transfers, external model providers, subprocessors, repository replication, support access, and deletion. A clause that says “confidential code” may not answer whether an AI coding service is allowed. If the contract is unclear, treat the ambiguity as a hold, not as consent.

Then inspect the actual Cursor workflow. Confirm the current Privacy Mode state, the model name, any provider or retention warning, and whether the request uses an ordinary editor feature or an agent feature. Cursor’s API key documentation should be used to understand the configured authentication route. Do not describe an API key as a privacy-direct connection.

A customer-approved API key may control access to a model provider. It does not, by itself, prove that Cursor does not receive request metadata, context, telemetry, or agent-related content. It also does not establish that every feature supports the same endpoint behavior.

Continue only when all of these are true

• The customer contract permits the relevant external processing.
• The current Privacy Mode status is captured.
• The model and its current data-use label are recorded.
• The request path is understood well enough for the customer’s review standard.
• The repository contains no production credentials or regulated records.
• The team has disabled features outside the approved scope.

Limit the workflow when one control is missing

Use the smallest code fragment that reproduces the issue. Remove identifiers, secrets, customer records, and proprietary business rules. Work from an isolated branch or sanitized fixture. Keep repository indexing narrow. Do not paste full configuration files when only one function is needed.

A .cursorignore file and repository exclusions can reduce accidental context transfer. They are not access control. They do not replace a separate account, a restricted repository, network policy, secret management, or a customer-approved execution environment.

Review reminder: “Privacy Mode enabled” is an evidence item, not a complete approval. Record what was enabled, which model was used, which feature was used, and what the customer contract allows.

Scenario three: secrets, regulated data, and core intellectual property

Treat a project as high sensitivity when it contains production credentials, personal information, regulated records, undisclosed vulnerabilities, core algorithms, customer security architecture, or material that could create contractual or legal exposure if copied.

For this class, the default decision is isolation.

Do not put real secrets into prompts, indexed folders, terminal transcripts, environment snapshots, or agent setup scripts. Do not assume that deleting a secret from the visible chat removes it from every derived log, workspace, cache, or provider system. Do not use a real production database dump to make an AI-generated test pass.

Approved use may be possible only in a separated environment

A customer-approved local model can be appropriate when the customer accepts the model, the hardware, the operating system, and the update process. A separately controlled remote Mac can also be appropriate when the customer requires Apple tooling but does not permit the code to enter a shared cloud agent workflow.

In either case, define:

• Which repository is mounted.
• Which user account can access it.
• Which network destinations are allowed.
• Whether telemetry is disabled or restricted.
• Where logs are stored.
• How secrets are injected and removed.
• How the environment is deleted after delivery.
• Who can approve software and model updates.

A local model is not automatically private. It may still call an external endpoint, download telemetry, expose logs, or run inside a poorly controlled shared host. The isolation claim must describe the entire path from editor to model and from terminal to network.

What is allowed, restricted, or denied

Allowed: sanitized code, synthetic records, approved local inference, and customer-approved remote development with documented access controls.

Restricted: ordinary Cursor assistance against a redacted branch, only if the customer contract explicitly allows the route and the reviewer can verify the model and settings.

Denied: production keys, live personal data, undisclosed exploit details, and unapproved cloud execution.

Which customer projects should move to an isolated local-model environment? Move them when the customer forbids external model processing, when data residency cannot be demonstrated, when the model provider is not approved, or when the workflow needs real secrets or regulated data. Do not make development speed an exception to a confidentiality requirement.

Scenario four: Cursor Cloud Agents need a separate approval

Cloud Agents are not just another completion setting. Cursor’s official documentation states that an agent can clone a repository and run work inside an isolated virtual machine. That creates additional objects to review: the repository connection, the virtual machine, environment variables, network access, agent conversation, generated artifacts, and deletion behavior. Read the official Cloud Agents documentation before approving the feature.

The relevant question is not only whether the virtual machine is isolated from other tenants. You must also ask where the repository is cloned, how long the workspace remains, whether the agent can reach external services, what appears in logs, and how secrets are supplied. The Cloud Agent security and network documentation describes the network controls that must be checked against your customer policy.

Cloud Agent release conditions

• The customer permits repository cloning into a provider-managed environment.
• The customer permits the relevant model and external service route.
• The repository connection is limited to the approved project.
• Environment snapshots contain no uncontrolled secrets.
• Network egress is restricted to documented destinations.
• Secrets use an approved configuration rather than prompt text.
• The team understands the retention and deletion mechanism.
• The reviewer records the approval date and policy version.

Automatic rejection conditions

Reject Cloud Agents when the customer prohibits cloud storage of source code, prohibits repository copies, requires a customer-controlled execution host, or requires a model provider that the agent cannot use. Privacy Mode does not override those restrictions.

Could Cursor Cloud Agents retain customer code? Their repository clone, runtime environment, logs, conversation context, and generated files must be reviewed as separate data objects. Do not promise zero retention unless the current official policy and the configured workflow explicitly support that conclusion.

First step: build the project record before opening the editor

Create one record per project. Do not reuse a team-wide approval memo for every customer.

Record the project sensitivity level, customer name or internal identifier, contract restrictions, approved account, approved models, allowed Cursor features, prohibited features, repository scope, and reviewer. Mark whether the project can use ordinary requests, API key mode, Cloud Agents, or an isolated environment.

A useful record also contains:

• Current Privacy Mode status.
• Cursor client version.
• Model name and provider label.
• Verification date.
• Repository and branch scope.
• Secret-handling method.
• Network and endpoint decision.
• Evidence file locations.
• Next review trigger.

The review date must be renewed when Cursor changes privacy wording, model labels, default models, Cloud Agent retention, account controls, or terms. The August 14 corporate announcement and the arrival of Grok 4.6 make this a time-sensitive review, but neither source replaces the product settings or the customer contract.

Second step: test the smallest possible data path

Use a disposable repository. Put in synthetic code and a marker string that contains no customer information. Send one request through the exact feature you plan to approve. Record the model, feature, account, endpoint configuration, and resulting logs.

Do not call this a privacy test that proves the whole product. It verifies only that the selected workflow behaves as expected at the time of testing. Repeat the test separately for ordinary chat, inline completion, terminal actions, and Cloud Agents if more than one feature is being considered.

If you cannot identify the route or the retention rule, stop the release. Escalate to the customer’s security contact or move the project to isolation.

Third step: validate settings and model exceptions

Open the current Privacy Mode and team settings. Capture the visible state. Check whether the account is personal or team-managed. Confirm whether a policy is locked, inherited, or overridden.

Next, inspect the selected model’s current label and provider terms. A setting that applies to one model or feature may not apply identically to another. Cursor’s official data-use explanation should be read alongside the security overview, not substituted with community summaries.

Do not treat reports on DEV.to or developer forums as proof of training or retention. They can identify questions worth testing, but official documentation and current settings are the evidence standard.

Fourth step: remove data that the workflow does not need

Before indexing or prompting:

• Replace production credentials with placeholders.
• Remove personal and regulated records.
• Use fixtures instead of database exports.
• Delete private incident narratives from issue context.
• Narrow the workspace to the relevant package.
• Exclude deployment files containing secrets.
• Prevent shell history and logs from capturing tokens.
• Use a separate branch for sanitized reproduction.

This step reduces exposure but does not make an unapproved provider acceptable. Redaction is a risk reduction measure. It is not customer authorization.

Fifth step: approve, limit, or migrate

Use these conditions as the final decision tool:

• If the repository is public or synthetic, the current settings and model are documented, and no customer restriction applies, choose continue.
• If the repository is private but the contract allows external processing and only the data path or feature scope is uncertain, choose limited use. Permit sanitized snippets and approved features; block Cloud Agents and real secrets until the missing evidence is resolved.
• If the project contains trade secrets, production credentials, regulated data, or an unapproved provider, choose an isolated local or remote Mac environment.
• If Cloud Agents clone code into a provider-managed environment and the customer forbids cloud repository copies, reject Cloud Agents even when Privacy Mode is enabled.
• If you cannot prove the route, retention position, model approval, or customer authorization, choose isolation rather than relying on developer convenience.

Keep the approval evidence with the delivery record. A reviewer should be able to reproduce the decision without asking the original developer what happened.

Choosing the migration path without creating a new privacy problem

For an isolated workflow, decide whether the customer needs local inference on controlled hardware or a separately managed remote Mac. The decision depends on physical access, Apple-specific build requirements, network controls, model approval, and the customer’s deletion policy.

If the team needs a temporary controlled host, review MacHTML’s remote Mac console for the available management workflow. If the security reviewer needs operational details before approving the environment, use the MacHTML help documentation as the next verification point. These links explain the service workflow; they do not replace the customer’s own security approval.

A remote Mac is not automatically suitable for long-term heavy workloads, regulated production access, or projects that require a physical hardware interface. Self-hosted hardware may be better when the customer needs permanent control, fixed network boundaries, or an internal support process. The isolated option is valuable when the requirement is temporary development, Apple tooling, or a controlled migration away from cloud agents.

The practical weakness of the current unrestricted workflow is clear: it can mix customer repositories with provider-managed agent copies, expose secrets through prompts or environment snapshots, and leave the team unable to prove the exact model and retention path during an audit. Renting a separately managed Mac through MacHTML can offer a cleaner boundary for temporary isolated development, provided you verify the node, access, logging, deletion, and customer-approved model path before connecting sensitive code.

Use that option for projects that need a controlled test or delivery environment, not as a blanket claim that every workload belongs on rented hardware. After classification, keep the project record, the settings evidence, and the environment handoff materials together. That gives the customer a defensible answer: continue with defined limits, or migrate before confidential code enters an uncontrolled cloud path.