What is persistent-agent-memory?

A file-based memory system for sub-agents and skills. It defines where to store information, which kinds of memories to keep, and how to index them in MEMORY.md.

It helps sub-agents and skills save, find, and reuse learnings across coding sessions.

It preserves useful information between sessions, so agents can save and later recall user preferences, feedback, project details, and reference material.

persistent-agent-memory — Skill by MiguelAPerez/agent-skills.md

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 MiguelAPerez/agent-skills.md --skill persistent-agent-memory

Clone the repo

git clone --depth 1 https://github.com/MiguelAPerez/agent-skills.md

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/miguelaperez/agent-skills.md/persistent-agent-memory/github.svg)](https://agentmods.dev/skills/miguelaperez/agent-skills.md/persistent-agent-memory)

Your own site

<a href="https://agentmods.dev/skills/miguelaperez/agent-skills.md/persistent-agent-memory"><img src="https://agentmods.dev/badge/skills/miguelaperez/agent-skills.md/persistent-agent-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/miguelaperez/agent-skills.md/persistent-agent-memory"><img src="https://agentmods.dev/badge/skills/miguelaperez/agent-skills.md/persistent-agent-memory.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,716 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00065	$0.01716
Opus 5.5	$0.00026	$0.00686
Sonnet 5.5	$0.00013	$0.00343
Haiku 4.5	$0.00006	$0.00172

Measured 2mo ago against content hash b77df6f60b1f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

persistent-agent-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 2mo 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.

persistent-agent-memory/SKILL.md · 174 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

2mo ago First seen · 174 lines · 65 tokens per session scan A b77df6f60b1f

Subscribe to this mod's changes

persistent-agent-memory is a skill published in the GitHub repository MiguelAPerez/agent-skills.md (2 stars, last pushed 21d ago), with no licence file. It adds 65 tokens to every session and 1,716 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 2026-08-31.

Memory and context

persistent-agent-memory next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
persistent-agent-memoryMiguelAPerez/agent-skills.md	Skill	2	21d ago	none	A	65	Claude Code, Codex
knowledge-ingestopenclaw/openclaw	Skill	394k	today	MIT	A	80	Claude Code, Codex
mem0-oss-to-platformmem0ai/mem0	Skill	69k	yesterday	Apache-2.0	A	217	Claude Code, Codex
forgetasgeirtj/system_prompts_leaks	Skill	71k	yesterday	CC0-1.0	A	0	Claude Code, Codex
Cortexdanielmiessler/LifeOS	Skill	20k	2d ago	MIT	A	184	Claude Code
ha-data-storesshiwenwen/hope-agent	Skill	1.9k	today	MIT	A	115	Claude Code, Codex
memoryopensquilla/opensquilla	Skill	7.1k	7d ago	Apache-2.0	A	44	Claude Code, Codex