@4fu/pi-bin-hints
Automatically detects modern Unix tools and injects AI prompts
Install & Use
Copy this prompt and send it to your AI assistant (Claude / Cursor / TRAE / Codex / WorkBuddy etc.) to auto-install:
Help me install this AI Skill: @4fu/pi-bin-hints. It is used for: Automatically detects modern Unix tools and injects AI prompts Full Skill content: https://321skill.com/skills/4fu-pi-bin-hints/raw/index.md Read that page and install it.
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This Skill addresses the issue where AI coding assistants default to using legacy Unix tools (grep, find, sed, cat). Even when developers have installed more efficient alternatives (such as rg, fd, sd, bat, etc.), the model still tends to call the older commands, resulting in inefficient execution. At the start of each session, this Skill scans the PATH environment variable to detect the presence of approximately 30 predefined modern tools. It then injects the detection results as a one-line constant into the system prompt, guiding the model to prioritize using the faster tools.
Usage is extremely simple: after installation, it works fully automatically with no manual configuration required. Detection is performed once per session upon startup, and the results are cached until the session ends. This ensures the injected prompt line remains byte-consistent for every subsequent interaction within the session, preventing prompt cache invalidation. If none of the candidate tools are detected, nothing is injected, resulting in zero interference. Developers can simply issue commands in natural language as usual (e.g., "search the logs for errors"), and the model will automatically opt for the detected modern tools.
It is ideal for backend, full-stack, and agent developers who have already installed modern tool alternatives like rg, fd, bat, eza, jq, etc. It is particularly suitable for teams or individuals using pi (an AI coding agent) as a daily development assistant and who want the model to automatically recognize the local toolchain, reducing the need to manually specify tools. For users pursuing ultimate development efficiency and low token consumption, this Skill is an ideal choice.
It is recommended for use when standardizing team development environments to ensure all members have the same set of modern tools installed, maximizing its effectiveness. Note that detection occurs only once at the start of a session; if new tools are installed mid-session, a session restart is required for them to be recognized. This Skill is designed specifically for the pi system and is not applicable to other AI coding assistants.
Key Features
Unlike manually hardcoding a tool list in the system prompt, it automatically detects the binaries actually installed in the local PATH, dynamically generates the prompt line, and performs detection only once to avoid scanning PATH on every call, significantly reducing token consumption and latency.
Limitations
Only applicable to the pi system; relies on the PATH environment variable; requires PATHEXT support on Windows; only detects approximately 30 predefined candidate tools and cannot automatically discover tools not on the list.
FAQ
How can I add custom tools to the detection list?
Currently, custom extensions are not supported. However, you can modify the candidate list in the source code and use it via local linking.
What is the detection frequency? Will it impact performance?
Detection occurs only once per session (taking milliseconds), after which the results are cached. PATH is not scanned on every interaction, resulting in minimal performance impact.
Installation guide for AI assistants
If your AI coding assistant (Claude Code, Cursor, TRAE etc.) can see this page, send it this message to auto-install:
Visit https://321skill.com/skills/4fu-pi-bin-hints/raw/index.md to read the original Skill definition (Markdown format) for @4fu/pi-bin-hints, and install it according to the instructions.
Raw Markdown URL for AI: /skills/4fu-pi-bin-hints/raw/index.md