hopper-pi
A transparent, hackable modeling agent for computational designers who want AI inside their real workflow — not locked behind a black-box SaaS.
Install
pi install npm:hopper-pi
Installs from npm into ~/.pi/agent/.
Add -l for project-local (.pi/). Manage with pi list / pi update / pi remove.
What this package can reach
Detected automatically from the source at
version 0.1.80.
This describes access, not safety — you decide whether it's appropriate for what
the package claims to do.
- Behavior — Changes how the agent thinks Modifies the system prompt, injects messages, or rewrites conversation context.
- Commands — Runs shell commands Spawns processes on your machine.
- Files — Reads files outside your project Touches paths beyond the working directory, such as your home folder.
- Tool control — Can switch pi's tools on and off Calls setActiveTools, so it can disable built-ins — including safety-relevant ones.
- New tools — Adds model-callable tools Gives the agent new abilities. Additive and visible, unlike an override.
- UI — Draws its own interface Renders widgets, footers, dialogs or full-screen views.
What it actually did when run
observedLoaded in a sandbox with no network, a read-only filesystem and a recording stand-in for pi's API. This is what it called — not what the source suggests it might.
Tools registered rh_run_scriptrh_query_objectsrh_view_controlgh_apply_graphgh_param_rhinogh_create_widgetgh_mutate_widgetgh_edit_componentsgh_edit_paramgh_edit_wiregh_edit_groupgh_edit_scriptgh_get_canvasgh_list_componentsgh_get_canvas_errorspick_optionask_user
Events subscribed agent_endagent_startbefore_agent_startmodel_selectsession_shutdownsession_start
APIs called getActiveToolsgetActiveTools.filtergetActiveTools.includesgetAllToolsgetAllTools.findregisterCommandregisterToolsetActiveToolsui.notify
3 calls the source scan did not predict
getActiveTools.filter · getActiveTools.includes · getAllTools.find
Reached through a value the scan could not follow — passed as an argument, stored on another object, or returned by a helper.
Run against version 0.1.80 on 2026-08-02.
Registration-time behaviour under default settings; other configurations may differ.
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