Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add marcelopaniza/mempenny/plugin install mempennyWrote 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/commands/marcelopaniza/mempenny/nap)<a href="https://agentmods.dev/commands/marcelopaniza/mempenny/nap"><img src="https://agentmods.dev/badge/commands/marcelopaniza/mempenny/nap.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 | $0.00038 | $0.06070 |
| Opus 5 | $0.00019 | $0.03035 |
| Sonnet 5 | $0.00008 | $0.01214 |
| Haiku 4.5 | $0.00004 | $0.00607 |
Grade C, and why
nap scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
chmod 600 "$bak" Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
for settings_path in "$HOME/.claude/settings.json" "./.claude/settings.json" "./.claude/settings.local.json"; do How it starts
The opening of the file, as written. The whole thing — 435 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Schedule a recurring /mempenny:clean for the current memory directory. The schedule lives in ~/.claude/mempenny.config.json; the cleanup itself fires via a plugin-shipped SessionStart hook the next time you open Claude Code in this project after the scheduled time.
Auth-agnostic: works with whatever Claude Code is already using — OAuth, API key, otherwise. MemPenny doesn't care.
Step 1 — Parse arguments
The user invoked this command with: $ARGUMENTS
Parse optional arguments:
--cancel— remove the schedule entry for the current memory dir. Mutually exclusive with the configure flow.--list— print all scheduled memory dirs from the config and exit. Read-only.--dir <path>— absolute path to the memory directory. If set, use verbatim; otherwise auto-detect (Step 3).--lang <code>— output language. If not passed, checkMEMPENNY_LOCALE. Defaulten.
If both --cancel and --list are passed, treat as --list (read-only wins; cancel is ignored). If --list is passed, skip Step 3's memory-dir resolution — --list is global.
Step 2 — Load locale strings
2a — Validate <lang> before reading (H2: path traversal guard)
Before constructing the locale path, validate that <lang> matches the regex ^[a-zA-Z]{2,3}(-[A-Za-z0-9]{2,8})?$. If it does not match, treat it exactly like a missing locale: silently reset <lang> to en and warn with errors.locale_missing.
Read ${CLAUDE_PLUGIN_ROOT}/locales/<lang>/strings.json. Fall back to en if the file is missing (warn with errors.locale_missing).
You'll need nap.*, errors.*, warnings.*, prompts.*, confirmations.*, and clean.first_run_default keys.
Step 3 — Locate the memory directory
(Skip this step if --list was passed — --list is global across all configured memory dirs.)
If --dir <path> was passed, apply the following validation. On any failure, print errors.memory_dir_not_found and STOP:
- Regex:
^/[A-Za-z0-9/_.\ -]{1,4096}$(alphanumerics, slash, underscore, dot, hyphen, space only). - Realpath: run
realpath "<candidate>"via Bash. Use the resolved value for all subsequent steps. - Depth: reject if the realpath equals
/or has fewer than 2 path components. - Existence + not-a-symlink:
[ -d "$resolved" ] && [ ! -L "$resolved" ].
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.
- 7d ago First seen · 435 lines · 0 tokens per session scan C 74b5af0538ab
nap is a command published in the GitHub repository marcelopaniza/mempenny (2 stars, last pushed 18d ago), licensed MIT. It adds 38 tokens to every session and 6,070 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (asks for root, reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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