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 cwensel/arcaneum --skill arc-indexesgit clone --depth 1 https://github.com/cwensel/arcaneumWrote 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/cwensel/arcaneum/arc-indexes)<a href="https://agentmods.dev/skills/cwensel/arcaneum/arc-indexes"><img src="https://agentmods.dev/badge/skills/cwensel/arcaneum/arc-indexes/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/cwensel/arcaneum/arc-indexes"><img src="https://agentmods.dev/badge/skills/cwensel/arcaneum/arc-indexes.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 | $0.00045 | $0.00357 |
| Opus 5 | $0.00023 | $0.00179 |
| Sonnet 5 | $0.00009 | $0.00071 |
| Haiku 4.5 | $0.00005 | $0.00036 |
Grade A, and why
arc-indexes 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 9d 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
MeiliSearch Index Management
# List all indexes
arc indexes list
arc indexes list --json
# Create index
arc indexes create MyIndex
arc indexes create MyIndex --type source-code # Code-optimized settings
arc indexes create MyIndex --type pdf-docs # PDF-optimized settings
arc indexes create MyIndex --type markdown-docs # Markdown-optimized settings
# View index info
arc indexes info MyIndex
arc indexes info MyIndex --json
# List indexed items
arc indexes items MyIndex
arc indexes items MyIndex --limit 50
arc indexes items MyIndex --json
# Verify index health
arc indexes verify MyIndex
arc indexes verify MyIndex --json
# Update index settings
arc indexes update-settings MyIndex --type source-code
# Export index
arc indexes export MyIndex -o backup.jsonl
arc indexes export MyIndex -o backup.jsonl --json
# Import index
arc indexes import backup.jsonl
arc indexes import backup.jsonl --into NewIndex
# Delete index
arc indexes delete MyIndex --confirm
Index Types
- source-code (or
code): Optimized for code search with language filtering - pdf-docs (or
pdf): Optimized for document search with page filtering - markdown-docs (or
markdown): Optimized for documentation with heading search
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.
- 9d ago First seen · 53 lines · 45 tokens per session scan A 3b7adf85fee9
arc-indexes is a skill published in the GitHub repository cwensel/arcaneum (7 stars, last pushed 4d ago), licensed MIT. It adds 45 tokens to every session and 357 once invoked, about $0.0002 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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