using-memory

using-memory is a skill for Claude Code from Yupcha/memXT. It costs 59 tokens per session (646 once invoked), scanned A, original, MIT.

Instructions for using a local memory system that stores and retrieves project decisions, code context, and past work between sessions. The memory stays on the local machine.

In plain words
What is it for?
Searching compact memory entries, loading the full notes that matter, saving important decisions, and removing outdated stored information.
Why use it?
It prevents repeated investigation and helps recover earlier decisions when a task refers to previous work or an established project choice.

Skill for Claude Code

Written for Claude Code: SessionStart hook event.

Part of the memxt plugin — 1 skill, 2 commands, 3 hooks, 1 MCP server shipped together

Good fit Searching compact memory entries, loading the full notes that matter, saving important decisions, and removing outdated stored information.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yupcha/memxt/using-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 Yupcha/memXT --skill using-memory
Clone the repo
git clone --depth 1 https://github.com/Yupcha/memXT

Made for: Claude Code.

Or install memxt, the plugin that ships this one along with the rest of its 1 skill, 2 commands, 3 hooks, 1 MCP server.

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 using-memory

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/yupcha/memxt/using-memory"><img src="https://agentmods.dev/badge/skills/yupcha/memxt/using-memory.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 646 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 $0.00059 $0.00646
Opus 5.5 $0.00024 $0.00258
Sonnet 5.5 $0.00012 $0.00129
Haiku 4.5 $0.00006 $0.00065

Measured 1mo ago against content hash 518989b2a7d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

using-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 1mo 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.

claude-plugin/skills/using-memory/SKILL.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Using memxt memory

You have a persistent, local memory palace via the memory MCP server. It survives across sessions. Nothing leaves this machine. No cloud LLM is used to compress or store memory (unlike claude-mem-style pipelines).

Progressive disclosure (save tokens)

Always prefer this 2-step flow:

  1. memory_search — default detail=index returns compact hits (#id, wing/room, source, ~100-char snippet). Cheap.
  2. memory_get — pass promising id or ids to load full verbatim bodies only for what you need.

Do not pass detail=full unless the query is tiny or you already know you need every body (wastes context).

Example:

memory_search({ query: "cart limit", limit: 5 })
→ #42 decisions/… "Cart is capped at 37…"
memory_get({ ids: [42] })
→ full drawer text

Other tools

  • memory_wake_up — continuity brief (also auto-injected at SessionStart).
  • memory_profile — stable project facts; no embedding model.
  • memory_store — persist a decision / constraint / fact (verbatim). Prefer room: "decisions" for architecture choices.
  • memory_forget — delete by drawer id.
  • memory_stats / memory_dream — health / consolidation.

When to recall

Before answering "what / why / how did we …", "last time", "remember when", "our convention for …", or anything that depends on history:

  1. memory_search (index)
  2. memory_get on relevant ids
  3. Cite #id / source when you use a memory

When to store

After a real decision ("let's use X because Y"), a discovered constraint, a correction the user makes, or a fact you'd want next session, call memory_store. One crisp memory per fact.

Good:

"Cart is capped at 37 items because the Brightwell ERP rejects larger orders (0x5C error)."

Bad: "we talked about the cart."

Hooks already autosave session tails on Stop + PreCompact (local, verbatim). Still call memory_store for important decisions so they land in the profile, not only as a long episode.

Read the full file on GitHub · 72 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. 1mo ago First seen · 72 lines · 59 tokens per session scan A 518989b2a7d3

Subscribe to this mod's changes

using-memory is a skill published in the GitHub repository Yupcha/memXT (49 stars, last pushed 2mo ago), licensed MIT. It adds 59 tokens to every session and 646 once invoked, about $0.0002 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.

Related

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recall

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