EverOS is a Python library and local-first memory runtime that gives AI agents a portable memory layer across apps, devices, and workflows. It stores conversations, files, and agent activity as readable Markdown while maintaining local indexes for retrieval and reuse. The catalogue add-ons provide commands, skills, hooks, and settings for using EverOS with coding agents.
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.
npx agentmods add skills/evermind-ai/everos/add-memory-kindnpx skills add EverMind-AI/EverOS --skill add-memory-kindgit clone --depth 1 https://github.com/EverMind-AI/EverOSWrote 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.
[](https://agentmods.dev/skills/evermind-ai/everos/add-memory-kind)<a href="https://agentmods.dev/skills/evermind-ai/everos/add-memory-kind"><img src="https://agentmods.dev/badge/skills/evermind-ai/everos/add-memory-kind.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00055 | $0.02655 |
| Opus 5 | $0.00028 | $0.01327 |
| Sonnet 5 | $0.00011 | $0.00531 |
| Haiku 4.5 | $0.00006 | $0.00265 |
Grade A, and why
add-memory-kind 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.
How it starts
The opening of the file, as written. The whole thing — 309 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/add-memory-kind — Add a new business memory kind
When to invoke
Adding a new persisted business entity (Episode, Case, Skill, AtomicFact, Foresight, Profile, or something custom). Multiple storage layers may be involved; this skill walks the decision then the wiring.
1. Decide the storage combination
A memory kind does not have to use all three layers. Pick by what the kind actually needs:
| Need | Markdown | SQLite | LanceDB |
|---|---|---|---|
| Human-readable / agent-editable source-of-truth text | ✅ | ||
| Structured state, ACID transactions, joins, predicates | ✅ | ||
| Vector / BM25 / hybrid retrieval | ✅ |
Common combinations seen in EverOS:
| Combo | Example | Rationale |
|---|---|---|
| md only | scratch notes / dump bins | text-of-truth, no index needed |
| md + lancedb | episode / memcell / case | text-of-truth + semantic retrieval |
| md + sqlite | profile / playbook / soul.md state | text-of-truth + structured state to query |
| md + sqlite + lancedb | full-blown business records | when you need both transactional state AND retrieval |
| sqlite only | audit log / task queue / LSN watermark | system state, never user-facing |
| lancedb only | rare; usually you still want md | derived embeddings without text-of-truth |
Rule of thumb: markdown is the truth; sqlite and lancedb are derived indexes that can be rebuilt from md. Drop md only when the kind has no human-readable form (pure system state).
2. Pick the markdown storage strategy (if md is in your combo)
Three strategies — declared in the EverOS Markdown First spec:
| Strategy | Filename | Mutation | Examples |
|---|---|---|---|
| Daily-log append | <prefix>-YYYY-MM-DD.md |
append entries | memcell / episode / case / atomic_fact / foresight |
| Skill-named in-place | skill_<name>.md |
overwrite the file | skills (procedural memory) |
| Single-file rewrite | user.md / agent.md / soul.md / behaviors.md / tools.md |
overwrite the file | profiles / playbooks |
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.
- 6d ago First seen · 309 lines · 55 tokens per session scan A fe912761c8d0
add-memory-kind is a skill published in the GitHub repository EverMind-AI/EverOS (12,722 stars, last pushed 2d ago), licensed Apache-2.0. It adds 55 tokens to every session and 2,655 once invoked, about $0.0003 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.
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