2026 DeepSeek Harness Code-Signing Environment Acceptance

Signing succeeded, but the environment may still be unacceptable.

The fastest fix is to approve the setup only after you verify four boundaries: separated build and signing stages, a dedicated execution identity, the smallest required certificate scope, and a reversible handoff.

This guide is for you if you need a remote Mac to run archive, exportArchive, or codesign through DeepSeek Harness. It is also for security, DevOps, and procurement teams responsible for certificates, private keys, release permissions, and delivery evidence.

The acceptance decision

Treat DeepSeek Harness code signing acceptance as a security acceptance exercise, not as a successful build demonstration.

DeepSeek Harness can schedule commands when its execution permissions allow them, but its official project documentation does not establish that it should custody Apple code-signing private keys or export passwords. The project is also described as being in developer preview, with compatibility-breaking changes possible. That makes observable evidence more important than a single successful run. Review the official DeepSeek Harness repository and its developer-preview status.

Your acceptance result should be one of three outcomes:

• Approved for signing: the process identity, signing identity, authorization path, logs, and recovery procedure all meet the agreed boundary.
• Restricted approval: archive and unsigned build work, but signing remains manually approved or limited to a controlled operator.
• Rejected: the provider cannot prove who signed, which private key was used, where secrets were stored, or how the environment will be cleaned up.

A code-signing identity is not the same as a certificate file. The identity requires the certificate and the matching private key. Apple explicitly notes that a certificate contains public information and cannot sign code by itself. Read Apple’s certificate and private-key explanation.

Execution identity

The first metric is not “does the command return success?” It is which macOS account actually ran the command.

Check object

Record the identity of all actors in the chain:

• The account that starts the DeepSeek Harness session.
• The account used by the background service, shell, SSH session, or remote desktop session.
• The account that runs xcodebuild, codesign, notarization commands, or export scripts.
• The account that owns the workspace, temporary files, archives, and Keychain.
• Any administrator account used during installation or setup.

Do not accept a shared account merely because it makes setup easier. A shared administrator account weakens attribution, expands file access, and makes it difficult to determine whether a release was initiated by the Harness, a human operator, or an unrelated process.

Evidence product

Your acceptance package should contain:

• A task identifier.
• The source revision or commit identifier.
• The macOS execution account.
• The command family that ran.
• The archive or export result.
• A timestamp generated by the execution system.
• A sanitized process or session record showing the account context.

The evidence does not need to expose a customer Team ID, certificate name, private-key path, or personal account details. Use redacted identity summaries and stable fingerprints where necessary.

Reject if

Reject the environment when:

• The provider cannot identify the account that performed signing.
• The Harness uses an administrator account for ordinary analysis or build work.
• The visible SSH account differs from the account used by the actual signing process without an approved reason.
• A task cannot be linked to a source revision and signing result.
• Interactive login is required, but the delivery description claims unattended operation.

A remote Mac is not automatically isolated because it is remote. Account separation, process attribution, and workspace ownership must be demonstrated.

Certificate and private-key boundary

Apple’s documentation describes the code-signing identity as a certificate paired with its private key. The certificate can be copied and inspected. The private key is the asset that must remain controlled. See Apple’s code-signing identity guidance.

Check object

Verify that:

• The required signing identity exists.
• Its certificate is valid for the intended distribution channel.
• The matching private key is present and usable by the approved process.
• The identity is associated with the intended Keychain.
• No unrelated distribution identities are available to the Harness account.
• The provisioning and export settings match the approved release path.

A certificate list or Keychain screenshot is not sufficient evidence of private-key usability. It proves, at most, that a certificate object is visible. The acceptance test must perform a controlled signing operation and record the identity summary without exposing secrets.

Evidence product

Request a redacted identity report containing:

• Certificate type or role.
• Validity status.
• Public certificate fingerprint.
• Keychain classification.
• Signing command result.
• Verification result from the signed output.

Do not request a screenshot that reveals personal names, customer identifiers, private-key labels, filesystem paths, or account email addresses. If a private key is transferred in a password-protected identity file, document who generated it, who approved the transfer, who imported it, and who is responsible for backup and deletion. Anyone who obtains an exported signing identity and its password may distribute software appearing to come from the developer account. Review Apple’s signing-certificate sharing guidance.

Reject if

Reject the delivery when:

• The provider calls the certificate file “the private key.”
• The private key was exported without an owner and deletion record.
• The environment exposes several release identities without a documented need.
• The provider cannot explain whether backup copies exist.
• The signing identity is valid only because a human manually unlocked or approved it, while the requested service is unattended.

The minimum acceptable scope is not “all certificates needed by the team.” It is the smallest identity set required for the specific archive, export, or release task.

Keychain authorization

The central remote Mac question is not whether a Keychain exists. It is whether the exact process context can use the intended signing identity without receiving access to unrelated secrets.

A login Keychain may contain the developer’s private key because Apple’s certificate creation process can generate the key pair there. A dedicated Keychain can provide a cleaner operational boundary, but it still requires explicit configuration and authorization. Read Apple’s Keychain implementation notes.

Test matrix

Run the same controlled signing operation in four states:

• An interactive local terminal session.
• A remote terminal or SSH session.
• The actual DeepSeek Harness process context.
• A locked or newly initialized environment after the approved Keychain setup.

Record whether the operation:

• Succeeds without a prompt.
• Shows an authorization dialog.
• Fails because the Keychain is locked.
• Fails because the identity is not visible.
• Uses a different identity than expected.
• Writes secret material to standard output or logs.

Apple documents that codesign searches available Keychains unless a specific Keychain is supplied, while selecting a Keychain can narrow the search to that file. That behavior makes explicit Keychain selection and identity verification important during acceptance. Review the relevant codesign behavior.

Reject if

Reject the setup when:

• The interactive terminal passes but the Harness process fails.
• The team disables Keychain prompts for the whole account to avoid an authorization dialog.
• A password is placed in a prompt, project file, script argument, environment dump, or Harness session transcript.
• The process can unlock unrelated Keychain items.
• The test passes only while a developer is actively logged in through a graphical session.

Authorization must be narrow. Approve only the tools and identities required for the signing stage. Do not turn a convenience workaround into account-wide secret access.

Build and signing separation

Separate ordinary code work from release authority.

A safe workflow lets DeepSeek Harness inspect code, run tests, and produce an unsigned build before it can access signing capability. Only a reviewed release stage should load the signing identity, unlock the dedicated Keychain, or invoke export and notarization actions.

This separation limits the effect of malicious repository content, unreviewed scripts, third-party plugins, and generated instructions. A build task that can read and modify a workspace does not automatically need release credentials.

Use this acceptance path:

• Run code analysis without any signing identity available.
• Run a clean unsigned build.
• Store the build result and test logs.
• Review the source revision and generated scripts.
• Start a separate signing stage with a new task identifier.
• Permit only the required signing tools.
• Verify the archive, exported package, and signature.
• Close the signing stage and remove temporary authorization.

Apple’s documented distribution workflow separates archive creation from export. The command-line path uses xcodebuild for the archive and then exportArchive to produce the distribution-signed output. Follow Apple’s archive and export workflow.

Reject a design where every Harness session can sign by default. Also reject a design where unreviewed scripts can silently change the signing identity, export options, or destination.

Logs and build artifacts

Logs must prove what happened without becoming a secret storage system.

Check object

Inspect:

• DeepSeek Harness session output.
• Shell and Bash output.
• Xcode and xcodebuild logs.
• Archive metadata.
• Export logs.
• Notarization or release checks.
• Temporary directories.
• Workspace history and shell history.
• Failed command output.

Search for passwords, private-key filenames, Keychain passwords, sensitive account names, environment variable dumps, access tokens, and unredacted identity paths.

Evidence product

Keep only what a reviewer needs to locate the failure:

• Task and source revision.
• Stage name.
• Archive status.
• Signing status.
• Export status.
• Notarization status, if applicable.
• Redacted identity fingerprint.
• Verification result.
• Failure category and exit status.

The evidence should tell you whether the failure happened during archive, signing, export, or notarization. It should not disclose the value that allowed the operation.

Reject if

Reject the environment when:

• The log contains a password or private-key material.
• A failed command prints all environment variables.
• The exported archive includes temporary signing files.
• The evidence cannot distinguish an archive failure from a Keychain authorization failure.
• The Harness can read prior sessions containing secrets.

Do not rely on log deletion alone. Confirm that caches, workspace copies, shell history, temporary archives, and session storage are also covered by the cleanup plan.

Revocation and handoff

A remote Mac handoff is incomplete until the old environment fails safely.

Simulate three events:

• The project moves to another operator.
• A person with signing access leaves the project.
• The rental or temporary access period ends.

For each event, verify the removal or replacement of:

• Signing certificates and private keys, according to the agreed responsibility.
• Dedicated and temporary Keychains.
• Provisioning profiles and export configuration.
• Environment variables.
• Shell history entries.
• Workspace copies and archives.
• Exported application packages.
• Cached credentials.
• DeepSeek Harness session data.
• Automation scripts containing identity references.

Then revoke or replace credentials where required. Run the same controlled signing task after cleanup. The old environment must fail because the signing identity is absent, the Keychain is unavailable, or authorization has been removed. A new environment should succeed only after a documented import and approval process.

Apple’s code-signing guidance notes that moving to another Mac may require exporting and importing the private key separately. That makes private-key ownership and backup responsibility part of delivery acceptance, not an optional administrative detail. Read Apple’s code-signing task documentation.

Five-step acceptance run

Use this sequence when you receive a remote Mac for DeepSeek Harness work:

1. Freeze the scope. Write down the intended archive, export, signing, and release actions. Exclude unrelated identities, repositories, plugins, and administrator functions.

2. Verify the account. Start a task that records the effective macOS account, workspace owner, process parent, and source revision. Repeat this through the remote connection and the actual Harness process.

3. Prove the identity. Inspect the redacted certificate fingerprint, confirm the matching private key can perform the controlled operation, and verify that the identity belongs to the intended distribution path.

4. Test authorization boundaries. Run unsigned build, interactive signing, remote signing, and Harness signing separately. Record prompts, locks, identity selection, and failures. Do not place passwords in prompts or files.

5. Revoke and retest. Remove temporary assets, apply the agreed credential changes, and rerun the signing command. Issue an approval, restricted approval, or rejection based on observable evidence.

Keep the acceptance package tied to the task, source revision, account, identity summary, stage result, and cleanup result. Never include real certificate names, customer Team IDs, passwords, or private-key paths.

FAQ

The questions below cover the operational issues that most often cause a remote signing acceptance to fail.

Can DeepSeek Harness access a signing certificate in Keychain?

Yes, but only if the actual process account can see the intended Keychain, the certificate has a matching private key, and the required authorization has been granted. Certificate visibility alone proves very little. Test the exact Harness process, not only a developer’s interactive terminal, and record a redacted identity fingerprint with the signing result.

Why does unattended signing show an authorization prompt?

The usual causes are an unlocked interactive session, a different execution account, an unapproved tool, a locked Keychain, or a command that searches a different Keychain than expected. Reproduce the failure through the remote connection and the Harness process. Do not solve it by granting broad access to the entire account.

Which Keychain should hold the signing identity?

A dedicated signing Keychain is generally easier to limit and remove, while the login Keychain may be simpler for an existing Xcode setup. The correct choice depends on the exact archive and export workflow. Accept either only after testing identity discovery, authorization, unattended execution, and cleanup under the same account that will run the release task.

How do you confirm that a private key did not leak during cloud Mac delivery?

Ask for process evidence, not a certificate screenshot. The delivery record should explain who generated, imported, backed up, and deleted the private key, while sanitized logs prove that no password or key file entered the session, workspace, archive, or shell history. A handoff without a post-delivery cleanup test is incomplete.

What should be deleted when the rental ends?

Remove the dedicated Keychain, private-key material under the agreed responsibility, provisioning files, environment variables, archives, exported packages, workspace copies, cached credentials, shell history entries, and Harness session data. Revoke or replace credentials where necessary. Then prove that the old Mac cannot sign and that a new Mac requires controlled reauthorization.

Current setup versus a controlled Mac signing environment

A shared Windows or Linux runner can handle source inspection and parts of a cross-platform build, but it is not the best long-term answer for Apple archive and signing work. It introduces a separate Mac handoff, weaker visibility into Keychain state, more manual intervention for Xcode export, and unclear responsibility for the private key. A generic shared cloud VM creates similar problems when multiple projects use the same administrator boundary or persistent workspace.

A controlled Mac environment gives you a more direct path for Xcode archive, export, Keychain testing, account isolation, and cleanup. It is still not automatically suitable for every project: long-running, high-volume signing may justify a dedicated internal fleet, and workflows requiring physical devices or hardware tokens need explicit hardware access planning.

If you need a temporary acceptance environment, a release rehearsal, or a controlled remote Mac for DeepSeek Harness, compare the available Mac use cases and review the service FAQ before committing. When you need a defined rental period rather than another shared runner, check the current KVMFLUX options and ask for the account, Keychain, evidence, and revocation boundaries in writing.

Start with a blank acceptance worksheet. Check the execution account, signing identity, unattended authorization, log sanitization, and end-of-rental cleanup in that order. Approve continuous signing only when every boundary has evidence; otherwise keep signing manually gated while using the Mac for analysis, archive, and unsigned build work.

FAQ