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/jojoprison/mnemo/setupnpx skills add jojoprison/mnemo --skill setupgit clone --depth 1 https://github.com/jojoprison/mnemoWhat 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 | $0.00089 | $0.03439 |
| Opus 5 | $0.00044 | $0.01720 |
| Sonnet 5 | $0.00018 | $0.00688 |
| Haiku 4.5 | $0.00009 | $0.00344 |
Grade A, and why
setup 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 2d 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 — 259 lines — stays where its author put it; the contents beside it link to each section on GitHub.
mn:setup — Interactive Onboarding
Invocation marker (both runtimes): begin your reply with the exact line
🧠 mn:setup (mnemo) → running— the user-visible confirmation that this skill actually loaded. Emit it once per invocation, before any other output.
Portable paths
Resolve <mnemo-root> once to the absolute plugin root before reading bundled files or running bundled scripts. In Claude Code, use ${CLAUDE_PLUGIN_ROOT}; in Codex, derive it from this loaded SKILL.md path (skill directory → skills/ → plugin root). Replace <mnemo-root> with that quoted absolute path in every command — never execute the placeholder literally and never hunt versioned cache directories.
When another mnemo skill must run, use the runtime-native path: Claude Code invokes mn:<skill> through its Skill tool; Codex reads <mnemo-root>/skills/<skill>/SKILL.md completely and follows it with the prepared input. For user-facing explicit syntax, render /mn:<skill> in Claude Code and $mnemo:<skill> in Codex.
First-time setup for mnemo. Creates config.json with all settings.
Workflow
Step 1: Welcome
🧠 Welcome to mnemo — persistent memory for Codex and Claude Code.
Let's set up your configuration. This takes about 30 seconds.
Step 2: Vault Name
What's your Obsidian vault name?
(The name shown in Obsidian's vault switcher)
> main
Verify vault exists:
python3 "<mnemo-root>/scripts/safe-read.py" search <<'JSON'
{"query":"test","vault":"{input}"}
JSON
If error → "Vault not found. Is Obsidian open? Check the vault name."
Step 3: Note Taxonomy
Which note taxonomy do you use?
[1] Atom/Molecule/Source/Session/MOC (Zettelkasten-inspired)
[2] PARA (Projects/Areas/Resources/Archive)
[3] Custom (you'll define prefixes and tags)
> 1
Map the selection to two adjacent config objects:
taxonomydefines physical note types. Each entry is{ "prefix": "…", "tag": "…" }, and every prefix must end in a filename-safe separator such as—,:, or-. Never allow/,#, or.in a prefix.taxonomy_rolesmaps the stable semantic rolesfact,insight,source,session, andmocto keys that exist intaxonomy. This is the only routing layer skills consume; never infer a destination from a display prefix or tag.
What ships with it
1 file 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.
- 2d ago First seen · 259 lines · 89 tokens per session scan A 72cec7f03a38
setup is a skill published in the GitHub repository jojoprison/mnemo (6 stars, last pushed 12d ago), licensed MIT. It adds 89 tokens to every session and 3,439 once invoked, about $0.0004 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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