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 skills add Vortx-AI/emem --skill emem-long-horizon-memorygit clone --depth 1 https://github.com/Vortx-AI/ememWrote 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/vortx-ai/emem/emem-long-horizon-memory)<a href="https://agentmods.dev/skills/vortx-ai/emem/emem-long-horizon-memory"><img src="https://agentmods.dev/badge/skills/vortx-ai/emem/emem-long-horizon-memory/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vortx-ai/emem/emem-long-horizon-memory"><img src="https://agentmods.dev/badge/skills/vortx-ai/emem/emem-long-horizon-memory.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00144 | $0.01853 |
| Opus 5.5 | $0.00058 | $0.00741 |
| Sonnet 5.5 | $0.00029 | $0.00371 |
| Haiku 4.5 | $0.00014 | $0.00185 |
Grade A, and why
emem-long-horizon-memory scanned grade A with 1 finding 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 17d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| curl -sf -X POST https://emem.dev/mcp -H 'content-type: application/json' \ How it starts
The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
emem-long-horizon-memory
Network use. The commands in this skill send and receive JSON (and, where a step says so, an image or a raster file) to
https://emem.devonly, the service the plugin's MCP server connects to. Nothing they download is executed. The files underscripts/read local files and make no network calls.
A context window ends; a note in your namespace does not. The note is
signed with your key, so the session that reads it back can check that
it is the note you wrote and not something that was put in its place.
For handing work to a different agent, see
emem-multi-agent-handoff.
What survives a reset
| Survives | Lost unless you wrote it down |
|---|---|
| your seed file, if you persisted it: the only proof the namespace is yours | the key, if the seed lived only in the context |
every note at its path, and every version by file_cid (blobs are never deleted) |
which file_cid was current when you last looked |
| the inbox, recomputed on every call | anything that arrived on /v1/memory/sse while you were away: SSE is a live tail with no backfill |
emem:fact: tokens you cited, which resolve to the same signed bytes |
the values you paraphrased beside them |
So a checkpoint should hold tokens and file_cids, not prose summaries of numbers.
Set up once
SIGN="${CLAUDE_SKILL_DIR}/../emem-sign-and-attest/scripts/sign_write.py"
python3 "$SIGN" --init # creates ~/.config/emem/agent_identity.json once, mode 600
mcp() { # mcp TOOL ARGS_JSON OUT_FILE
jq -n --arg n "$1" --argjson a "$2" \
'{jsonrpc:"2.0",id:1,method:"tools/call",params:{name:$n,arguments:$a}}' \
| curl -sf -X POST https://emem.dev/mcp -H 'content-type: application/json' \
-H 'accept: application/json, text/event-stream' -d @- -o "$3"
}
PK8=$(python3 "$SIGN" --whoami | jq -r .namespace | cut -d/ -f4)
--init never overwrites an existing identity. Writes are MCP tools;
there is no REST write route.
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.
- 17d ago Changed · +2 lines 82c49e7bdb1c
- 18d ago First seen · 129 lines · 144 tokens per session scan A f7a0615c76f3
emem-long-horizon-memory is a skill published in the GitHub repository Vortx-AI/emem (71 stars, last pushed today), licensed Apache-2.0. It adds 144 tokens to every session and 1,853 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-29.
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