jo32/DeepDeck
C3Build and reuse WebMCP tools in a macOS desktop workspace for DeepSeek Harness.
★ 10+ · jo32/DeepDeck source on GitHub · this plugin in the registry
jo32/DeepDeck is a DeepSeek Harness plugin rated C3 — powerful capability combined with sensitive behavior. It patches the dsh runtime, can rewrite the system prompt, gates tool execution, executes system commands.
Installable plugin — declares a dsh.bundle manifest
What it can do
| Capability | Flag | Evidence |
|---|---|---|
| patches the dsh runtime | runtime_patch | ./cordis.patch.yml |
| can rewrite the system prompt | prompt_surface | systemPrompt, webServer, system-prompt/assemble, tools/pre-execute |
| gates tool execution | tool_gate | hook: tools/pre-execute |
| executes system commands | exec | ×78 in authored code, e.g. scripts/build-desktop-package.mjs:1, scripts/build-desktop-package.mjs:55 |
| decodes base64 payloads | base64_decode | ×15 in authored code, e.g. apps/desktop/scripts/browser-passkeys-fixture.cjs:85, apps/desktop/scripts/browser-passkeys-fixture.cjs:98 |
| starts a network server | net_server | ×28 in authored code, e.g. apps/desktop/scripts/browser-composer-fixture.cjs:17, apps/desktop/scripts/browser-composer-fixture.cjs:39 |
| reads credential-class env vars | token_env | DEEPDECK_BENCHMARK_TOKEN, DEEPDECK_PASSKEY_TRACE, R2_ACCESS_KEY_ID, R2_SECRET_ACCESS_KEY, VL_NATIVE_KEY |
Services it injects
agentPresets agents appConversations attachments bunPluginBuilder configForms connection deepdeckBrandComposition deepdeckCharacter deepdeckComputerUse desktopActions desktopPnpm desktopProfiles loader locale modules remote sessionController sessionProjections sessions settings skills slots systemPrompt theme tools uiSession uiWorkspace web webRuntime webServer workspaceRegistry workspaces
Hooks it attaches
agent-preset/selected agent/created agent/disposed agent/pre-step domain/changed session/event settings/document-updated system-prompt/assemble theme/change tools/pre-execute
Outbound domains
deepdeck.getmegaportal.com tigerbeetle.com api.dshfind.com deploymentsafety.openai.com sakana.ai dsh-marketplace.qilewl.net bun.com web-platform-tests.org chatgpt.com schema.org
Environment variables it reads
DEEPDECK_BROWSER_TEST_BUNDLE DEEPDECK_BROWSER_TEST_PROFILE DSH_HOME DEEPDECK_UI_TEST_SCREENSHOT DEEPDECK_BROWSER_CORE_ASSETS DEEPDECK_COMPOSER_SCREENSHOT DEEPDECK_PASSKEY_TRACE DEEPDECK_KEEP_RUNTIME_TEMP GITHUB_OUTPUT DEEPDECK_COMPOSER_SCOPE
How to read this
Levels measure capability surface and transparency, not maliciousness. A C3 plugin can be entirely legitimate — a desktop shell genuinely needs subprocesses. The point is that you can see this before installing. See the levels explained and how dsh plugins work.
Findings come from static analysis of shipped code; nothing is executed. Think a flag is wrong? Open an issue — every flag cites the file and line it came from.