forget

forget is a skill for Claude Code, Codex from asgeirtj/system_prompts_leaks. It costs 74 tokens per session (1,374 once invoked), scanned A, original, CC0-1.0.

A memory-cleanup tool that removes a personal fact, preference, relationship detail, topic, or past event from the agent's active memory and related copies.

In plain words
What is it for?
It helps carry out requests such as forgetting something about the user or stopping an old detail from being brought back by existing automations.
Why use it?
It handles a request to forget information across stored memory and related reminders or created items, rather than deleting only one note.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit It helps carry out requests such as forgetting something about the user or stopping an old detail from being brought back by existing automations.

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Install with agentmods
npx agentmods add skills/asgeirtj/system_prompts_leaks/forget
About the project

System Prompts Leaks is a collection of captured system instructions used to guide AI chatbots and coding agents before they receive user messages. It serves researchers and developers studying how different AI assistants are directed.

asgeirtj/system_prompts_leaks · 69,084 stars · on GitHub

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.

Any agent
npx skills add asgeirtj/system_prompts_leaks --skill forget
Clone the repo
git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for forget

README.md
[![agentmods](https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/forget/github.svg)](https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/forget)
Your own site
<a href="https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/forget"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/forget/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for forget

Your own site · 80×15
<a href="https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/forget"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/forget.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,374 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00074 $0.01374
Opus 5.5 $0.00030 $0.00550
Sonnet 5.5 $0.00015 $0.00275
Haiku 4.5 $0.00007 $0.00137

Measured 3d ago against content hash 3ffe3787b0d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

forget 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 3d 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.

Meta/muse-agent/skills/forget/SKILL.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Forget

Treat forgetting as cleanup across Muse, not as editing one memory note. Information may also live in conversation history, other notes, preferences, goals, scheduled work, created items, search results, or active work that can write it back.

Use everyday language with the user and do not expose internal machinery. Say "memory," "reminders," "created items," "shared items," "logs," or "backups" instead of file names, database tables, indexes, projections, telemetry systems, tool names, agent types, or runtime machinery. Keep exact locators and technical details inside the private work. Get technical only when the user does or when they explicitly ask how the cleanup works.

Make a plan

Call forget.plan once with {}. It starts an ordinary untyped subagent with the normal tool catalog that derives the subject from the current conversation, so do not repeat sensitive text in tool arguments. Wait for its handoff instead of polling or doing a parallel search. Muse pins this child to muse-special, or to private Avocado on a confidential VM, independently of the active model selection.

The planner reads references/artifact-inventory.md, stays read-only, and checks:

  • original places and copies with the same meaning;
  • memory, search results, conversation context, and summaries made from it;
  • reminders, scheduled or active work, and outside sources that can recreate the information;
  • shared or published copies and anything Muse cannot erase.

It returns a concise plan covering what it found, what should change, how it will verify the cleanup, and known limits. Keep the handoff discreet; refer to "that information" instead of copying it into a new memory, todo, filename, or report. Use conversations privately to find downstream copies and future activity, but do not present the continued visibility or retention of the chat itself as a cleanup limit.

Ask, then execute

Show the user the plan's scope, irreversible actions, and important limits, translated into the everyday categories above, then ask one direct confirmation question. Silence, ambiguity, partial approval, or a changed scope is not confirmation.

Read the full file on GitHub · 122 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 122 lines · 74 tokens per session scan A 3ffe3787b0d1

Subscribe to this mod's changes

forget is a skill published in the GitHub repository asgeirtj/system_prompts_leaks (69,084 stars, last pushed today), licensed CC0-1.0. It adds 74 tokens to every session and 1,374 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-05.