add-memory

add-memory is a skill for Claude Code from Abilityai/abilities. It costs 24 tokens per session (1,349 once invoked), scanned A, original, MIT.

A memory layer for an AI coding agent, with options such as a searchable file index, connected notes, structured JSON state, or project tracking across sessions.

In plain words
What is it for?
Use it to search project files, store linked knowledge, update structured state, or manage projects, sessions, and archives.
Why use it?
It helps the agent retain useful information between sessions instead of starting with no organised record of past work.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

Part of the agent-dev plugin — 47 skills shipped together

Good fit Use it to search project files, store linked knowledge, update structured state, or manage projects, sessions, and archives.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/abilityai/abilities/add-memory
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 Abilityai/abilities --skill add-memory
Clone the repo
git clone --depth 1 https://github.com/Abilityai/abilities

Made for: Claude Code.

Or install agent-dev, the plugin that ships this one along with the rest of its 47 skills.

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 add-memory

README.md
[![agentmods](https://agentmods.dev/badge/skills/abilityai/abilities/add-memory/github.svg)](https://agentmods.dev/skills/abilityai/abilities/add-memory)
Your own site
<a href="https://agentmods.dev/skills/abilityai/abilities/add-memory"><img src="https://agentmods.dev/badge/skills/abilityai/abilities/add-memory/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 add-memory

Your own site · 80×15
<a href="https://agentmods.dev/skills/abilityai/abilities/add-memory"><img src="https://agentmods.dev/badge/skills/abilityai/abilities/add-memory.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,349 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 $0.00024 $0.01349
Opus 5.5 $0.00010 $0.00540
Sonnet 5.5 $0.00005 $0.00270
Haiku 4.5 $0.00002 $0.00135

Measured 6d ago against content hash cd964f4f6adf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

add-memory 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 6d 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.

plugins/agent-dev/skills/add-memory/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Memory

ℹ️ First, set expectations: before anything else, print one short line with this skill's version and its most recent change — the top entry of metadata.changelog above — e.g. add-memory vX.Y — recent: <summary>. Then proceed.

Add a memory system to an existing agent. Memory skills are COPIED into the agent's .claude/skills/ directory — the agent becomes self-contained with no plugin dependency.

Memory Types

Type Description Skills Installed
file-index File system awareness — creates and maintains a searchable file index setup-index, refresh-index, search-files
brain Zettelkasten-style knowledge graph — atomic notes with connections setup-brain, create-note, search-brain, find-connections
json-state Structured JSON state with jq-based updates and action logging setup-memory, load-memory, update-memory, memory-jq
workspace Multi-session project tracking — organized folders, sessions, archives setup-projects, create-project, create-session, archive-project

Process

Step 1: Determine Agent Directory

Check if we're in an agent directory (has CLAUDE.md) or if user specified a path.

# Check current directory
if [ -f "CLAUDE.md" ]; then
  AGENT_DIR="$(pwd)"
else
  # Ask user for agent path
fi

If no CLAUDE.md found, ask:

  • Question: "What agent should I add memory to?"
  • Hint: "Enter the path to the agent directory (should contain CLAUDE.md)"

Step 2: Check Argument or Ask Memory Type

If user provided an argument (e.g., /agent-dev:add-memory brain), use that.

Otherwise, use AskUserQuestion:

  • Question: "What kind of memory does this agent need?"

  • Header: "Add Memory"

  • Options:

    1. File awareness (file-index) — "I need the agent aware of workspace files"

      • Creates a searchable index of files in the workspace
      • Good for: agents that need to find and reference files
    2. Knowledge graph (brain) — "I need connected notes, evolving knowledge"

      • Zettelkasten-style atomic notes with connections
      • Good for: research agents, knowledge management, idea linking

Read the full file on GitHub · 139 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. 6d ago Changed · +1 lines cd964f4f6adf
  2. 1mo ago First seen · 138 lines · 24 tokens per session scan A 0fff8cfe502f

Subscribe to this mod's changes

add-memory is a skill published in the GitHub repository Abilityai/abilities (12 stars, last pushed 3d ago), licensed MIT. It adds 24 tokens to every session and 1,349 once invoked, about $0.0001 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 2026-08-30.

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