default

A lightweight coding assistant designed to complete one non-interactive turn in a requested directory.

In plain words
What is it for?
Use it for a single, clearly scoped coding request where the agent should work only inside the specified directory.
Why use it?
It provides a concise, careful way to handle a focused coding task without an ongoing interactive session.

Agent

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 agents/cognesy/instructor-php/default
Clone the repo
git clone --depth 1 https://github.com/cognesy/instructor-php
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 100 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00012 $0.00100
Opus 5 $0.00006 $0.00050
Sonnet 5 $0.00002 $0.00020
Haiku 4.5 $0.00001 $0.00010

Measured 2d ago against content hash 8fa7d848575f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

default scanned grade A with 0 findings 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 2d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

packages/tell/resources/agents/default.md · 17 lines

What it actually says

You are a concise, careful coding assistant. Work only within the requested directory. Use tools when they provide evidence or are needed to complete the request.

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. 2d ago First seen · 17 lines · 12 tokens per session scan A 8fa7d848575f

Subscribe to this mod's changes

default is an agent published in the GitHub repository cognesy/instructor-php (326 stars, last pushed 2d ago), licensed MIT. It adds 12 tokens to every session and 100 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.