Tool packs and a Task tool for orchestration

[gregjkal]

Summary

Two follow-ons to making everything a tool call (#30): group tools into importable "tool packs", and expose orchestration as a Task tool so fanout is no longer Lua-only.

Tool packs

From #cppa-wg21-org on 2026-09-09:

• It is annoying for every prompt to import basic tools like StrReplace, AppendFile, Grep, RG one by one.
• Tools should be namespaced into packs. Importing, for example, PFBasics brings in the basic store tools.
• Ties into the global tool namespacing question raised on 2026-09-10 (Agent persistence: record every tool call and assistant response, restore agent windows by replay #29).

Task tool

• fanout is expressible as tool calls to a Task tool. Today fanout is only available from Lua, which bifurcates the language.
• If a prompt adds the Task tool to what the LLM is offered, the LLM can orchestrate subagents itself. The same primitive serves Lua and the model.

Tool name translation (later)

• Cursor advertises its tools under different names depending on the model. Eventually PromptForge wants a translation layer, transparent to the prompt, that mutates tool names for better model performance.

Related

• Store as a tool: Replace the bespoke store Lua object with ordinary tool calls #30
• Agent persistence: Agent persistence: record every tool call and assistant response, restore agent windows by replay #29