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 rhoulihan/mneme/plugin install mnemeWrote 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/rhoulihan/mneme/retrieval)<a href="https://agentmods.dev/skills/rhoulihan/mneme/retrieval"><img src="https://agentmods.dev/badge/skills/rhoulihan/mneme/retrieval.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 | $0.00057 | $0.00380 |
| Opus 5 | $0.00028 | $0.00190 |
| Sonnet 5 | $0.00011 | $0.00076 |
| Haiku 4.5 | $0.00006 | $0.00038 |
Grade A, and why
retrieval scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Before reinventing, check what the organization already knows.
- Resolve the binary:
"$CLAUDE_PLUGIN_ROOT/bin/mneme"ifCLAUDE_PLUGIN_ROOTis set, elsebin/mneme. - Run
mneme search "<a few words describing the need>"— terms are OR-matched and ranked, so cast wide. Filter with--kind skillor--kind factand--plugin <name>when the target is known. - Top hits are entry points: skills route onward through their own SKILL.md; facts carry their category, tags, and verified date. For structured lookups use
mneme db query "SELECT ... FROM units WHERE ..."(read-only). - Read stderr, not just the hits. A
warning: index is stale for <repos>line means the corpus predates a merge, a pull, or an edit — so a thin or empty result may be the index rather than the organisation. Say so before concluding nobody knows this, runmneme index rebuild --stale, and search again; the second answer is the one to rely on. - If the index is not built (
index not builton stderr), fall back to reading the registered plugins' files directly —mneme registry listshows their paths — and suggestmneme db enableto the user once. - If retrieved knowledge turns out wrong or stale, flag it:
mneme flag --kind knowledge-issue "<what is wrong>".
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 · 14 lines · 57 tokens per session scan A ccc9e137b638
retrieval is a skill published in the GitHub repository rhoulihan/mneme (6 stars, last pushed 13d ago), licensed Apache-2.0. It adds 57 tokens to every session and 380 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 2026-08-31.
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