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/cloto-dev/cpersona/cpersona-memorynpx skills add Cloto-dev/CPersona --skill cpersona-memorygit clone --depth 1 https://github.com/Cloto-dev/CPersonaWrote 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/cloto-dev/cpersona/cpersona-memory)<a href="https://agentmods.dev/skills/cloto-dev/cpersona/cpersona-memory"><img src="https://agentmods.dev/badge/skills/cloto-dev/cpersona/cpersona-memory.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 | $0.00139 | $0.06111 |
| Opus 5 | $0.00069 | $0.03055 |
| Sonnet 5 | $0.00028 | $0.01222 |
| Haiku 4.5 | $0.00014 | $0.00611 |
Grade A, and why
cpersona-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 today.
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 — 451 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CPersona — persistent memory for Claude
CPersona is an MCP server that gives Claude
persistent memory across sessions. It stores memories in a single local SQLite
file and retrieves them with a 3-layer hybrid search (vector + FTS5 + keyword,
merged by Reciprocal Rank Fusion). It has zero LLM dependency — the server
never calls a model, so memory adds no generative API cost and stays out of
your token budget; the calling agent (you) does all summarization. (Embedding
is separate: EMBEDDING_MODE=api bills per store and per recall against
CPERSONA_EMBEDDING_API_URL. The local http mode and none cost nothing.)
- 31 tools, single SQLite file, MIT licensed.
- Works with Claude Desktop, Claude Code, and any MCP host.
- Repo: https://github.com/Cloto-dev/cpersona
This skill has two jobs: (1) help the user install and configure CPersona, and (2) use it correctly once it is connected.
When to use this skill
Activate this skill when any of the following is true:
- The user asks Claude to remember something across sessions, or complains that Claude forgets context between conversations.
- The user asks to install / set up / configure CPersona or "a memory server".
- CPersona MCP tools (
store,recall,archive_episode, …) are connected and the current turn contains a decision, a standing rule/preference, a bug finding, or a session boundary (start/end). - A
recallresponse carries anadvisoryfield, astoreresponse comes backembedded: false, or the user reports that memory search has got worse.
If CPersona tools are not connected and the user wants memory, go to Setup. If they are connected, go to Usage — or to When recall is degraded if a signal in the last bullet is what brought you here.
Setup
CPersona is a Python MCP server. Installing it has two parts: the memory server and a strongly recommended embedding server (it powers the vector-search layer). Running without an embedding backend is supported as a fallback — CPersona then serves FTS5 + keyword only — but it is not recommended for normal operation.
What ships with it
2 files 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.
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.
- today Changed · +61 lines · +24 tokens per session 45510d83862b
- 5d ago First seen · 390 lines · 115 tokens per session scan A 770e380f6eab
cpersona-memory is a skill published in the GitHub repository Cloto-dev/CPersona (6 stars, last pushed today), licensed MIT. It adds 139 tokens to every session and 6,111 once invoked, about $0.0007 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 2026-08-31.
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