prefer_cli_tools

A set of instructions telling coding agents to use command-line tools for logs, database queries, configuration, and administrative work instead of dashboards.

In plain words
What is it for?
Use it when checking logs, querying databases, configuring services, installing dependencies, managing resources, or checking service status.
Why use it?
It makes these tasks easier to automate, repeat, and include in development workflows.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/markmhendrickson/foundation/prefer_cli_tools
Clone the repo
git clone --depth 1 https://github.com/markmhendrickson/foundation

Made for: Cursor.

Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,478 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00030 $0.01478
Opus 5 $0.00015 $0.00739
Sonnet 5 $0.00006 $0.00296
Haiku 4.5 $0.00003 $0.00148

Measured yesterday against content hash b0c55c23c057, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prefer_cli_tools scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

3. **Script-based tools** (curl + API, custom scripts)
.cursor/rules/prefer_cli_tools.mdc · 234 lines

How it starts

The opening of the file, as written. The whole thing — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prefer CLI Tools Rule

Reference: foundation/agent_instructions/cursor_rules/configuration_management.md - Configuration management

Purpose

Ensures agents always prefer CLI tools over dashboard/UI access when checking logs, configuring services, querying data, or performing administrative tasks. CLI tools are more automatable, scriptable, and provide better integration with development workflows.

Trigger Patterns

When any of the following occur, agents MUST use CLI tools instead of dashboard/UI:

  • Checking logs (Supabase, SendGrid, application logs)
  • Querying databases (Supabase, PostgreSQL)
  • Configuring services (Supabase settings, SMTP, environment variables)
  • Managing resources (users, projects, deployments)
  • Checking status (service health, configuration state)
  • Installing dependencies (package managers, tools)

Agent Actions

Step 1: Check for Available CLI Tools

Before suggesting dashboard access, check if CLI tools are available:

  1. Check if tool is installed:

    which supabase
    which op
    which gh
    which aws
    
  2. Check if tool can be installed:

    • Package managers: brew, npm, pip
    • Official installers
    • Documentation for installation
  3. Verify CLI has required functionality:

    • Check CLI documentation
    • Test basic commands
    • Verify authentication/configuration

Step 2: Use CLI Tools

For Supabase:

  • Use supabase CLI for logs, configuration, database queries
  • Install if not available: brew install supabase/tap/supabase
  • Authenticate: supabase login

For 1Password:

  • Use op CLI for credential access
  • Already required for environment variable management

For Git/GitHub:

  • Use git CLI for all git operations
  • Use gh CLI for GitHub API operations

For Cloud Services:

  • Use aws CLI for AWS services
  • Use gcloud CLI for Google Cloud
  • Use service-specific CLIs when available

Step 3: Provide Installation Instructions

Read the full file on GitHub · 234 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 234 lines · 30 tokens per session scan A b0c55c23c057

Subscribe to this mod's changes

prefer_cli_tools is a cursor rule published in the GitHub repository markmhendrickson/foundation (2 stars, last pushed 1mo ago), licensed MIT. It adds 30 tokens to every session and 1,478 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.