DeepSeek Harness Plugin Safety Guide

DeepSeek Harness plugins can run code, call services, access files, and register tools inside an agent environment. Installing one should be treated like installing any other third-party software—not like enabling a harmless theme. This directory helps discovery; inclusion is not a security certification.

Before installation

Confirm the identity. Make sure the repository owner, package name, install target, and linked project all agree. Be cautious of look-alike names and recently transferred repositories.
Read the source and build scripts. Review package scripts, downloaded binaries, post-install actions, generated files, and native dependencies. A short README is not a substitute for source review.
Check maintenance evidence. Look at recent commits, releases, open security issues, archived status, and whether maintainers respond. Popularity alone is not proof of safety.
Map permissions. List filesystem paths, subprocesses, environment variables, network destinations, browser access, and external accounts the plugin can reach.
Protect secrets. Never paste a credential into source or a public issue. Use the runtime's secret mechanism and confirm the plugin does not expose secrets through logs, UI, errors, or model context.
Check compatibility. Compare the plugin's tested Harness version with your own. Developer-preview APIs can change, and an old plugin may fail in unsafe or confusing ways.

Each plugin detail page separates confirmed repository evidence from directory-declared records and avoids inventing installation commands when evidence is missing.

Install in an isolated profile

Use a disposable or least-privileged Harness profile first. Back up relevant configuration, pin a reviewed revision where practical, and grant only the minimum required access. Do not begin with production credentials or sensitive repositories.

After installation:

inspect the effective profile configuration;
exercise only the intended capability;
watch network requests, created files, child processes, and logs;
verify denied operations fail safely;
unload or remove the plugin and confirm its effects disappear.

See How to Install DeepSeek Harness Plugins for the current profile-scoped workflow.

Review model-facing tools

A tool description can influence when a model calls it, but it does not enforce security. Verify that the implementation validates arguments, constrains paths and commands, limits output, handles timeouts, and requires approval for consequential actions. Treat prompts, webpages, repository text, and tool output as untrusted data that may contain prompt injection.

Updates and supply-chain changes

Review updates as new software. A safe version today does not prove a future release is safe. Compare the changed source and lockfile, check new dependencies and build scripts, and repeat the isolated test before upgrading a sensitive environment.

Prefer reproducible versions or commits over an unbounded moving branch when the installation mechanism supports it. Record which version is deployed so rollback is possible.

Removal and incident response

Before production use, know how to disable and remove the plugin. If unexpected behavior appears:

stop the affected Harness profile;
revoke exposed credentials and sessions;
preserve relevant logs without publishing secrets;
remove or disable the plugin and inspect remaining files/processes;
restore known-good configuration;
report the issue privately to the maintainer when it may be a vulnerability.

Use this site's report form for inaccurate directory data. Security issues in a plugin should also be sent to that plugin's maintainer through its documented security channel.

Quick safety checklist

Repository and package identity verified
Source, scripts, binaries, and dependencies reviewed
Permissions and network destinations understood
Secrets isolated from source, logs, UI, and model context
Harness compatibility evidence checked
Tested in a disposable least-privileged profile
Update strategy and rollback version recorded
Removal tested and security contact identified