packages / pi-fairy-tales
extension Modes & workflows

pi-fairy-tales

Fairy-Tales-class harness for pi: subagents, memory, plan mode, ultraplan, hooks, todos, smart compaction, status line, web fetch, artifacts

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Install

$ pi install npm:pi-fairy-tales

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 0.15.0. 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.
  • 📡
    Extension bus — Talks to other extensions Uses pi.events to emit or listen on a shared channel, so it can coordinate with — or be driven by — other installed extensions.
  • 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.
  • Intercepts tools — Can block or rewrite tool calls Subscribes to tool_call/tool_result/input. Can change a command after you approved the one displayed.
  • 🌐
    Network — Talks to the internet Makes outbound network requests. Check the destinations are ones you expect.
  • 🔀
    Tool control — Can switch pi's tools on and off Calls setActiveTools, so it can disable built-ins — including safety-relevant ones.
  • 🛠
    Tool override — Replaces pi's built-in tools Intercepts built-ins like bash, edit, read or write — sees and can rewrite every use.
  • 🔧
    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

observed

Loaded 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.

Replaces pi's built-in tool: todo. Every use of that tool goes through this package instead of pi.

Tools registered artifactcodebase_intelrememberforgetexit_plantodofetch

Events subscribed before_agent_startcontextfairy-tales:agents:statusfairy-tales:clip:markfairy-tales:cost:addfairy-tales:plan:changedinputmessage_endmodel_selectsession_before_compactsession_before_forksession_before_switchsession_compactsession_shutdownsession_starttool_resultturn_end

APIs called events.onexecgetActiveToolsgetActiveTools.mapgetActiveTools.map.filtergetCommandsgetCommands.filtergetCommands.filter.mapgetCommands.filter.map.sortgetContextUsageregisterCommandregisterFlagregisterShortcutregisterToolsessionManager.getBranchui.confirmui.customui.notifyui.setStatus

6 calls the source scan did not predict

events.on · getActiveTools.map · getActiveTools.map.filter · getCommands.filter · getCommands.filter.map · getCommands.filter.map.sort

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 0.15.0 on 2026-08-02. Registration-time behaviour under default settings; other configurations may differ.

Review before you install. pi packages run with your full system permissions. Check the source, pin versions, and prefer authors you trust.

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