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.
git clone --depth 1 https://github.com/tractorjuice/arc-kitWrote 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/tractorjuice/arc-kit/glossary)<a href="https://agentmods.dev/commands/tractorjuice/arc-kit/glossary"><img src="https://agentmods.dev/badge/commands/tractorjuice/arc-kit/glossary/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/commands/tractorjuice/arc-kit/glossary"><img src="https://agentmods.dev/badge/commands/tractorjuice/arc-kit/glossary.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 | $0.00016 | $0.03181 |
| Opus 5.5 | $0.00006 | $0.01272 |
| Sonnet 5.5 | $0.00003 | $0.00636 |
| Haiku 4.5 | $0.00002 | $0.00318 |
Grade B, and why
glossary scanned grade B 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 3d 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 the agent to reveal its instructionsmediumSystem prompt leakage
Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.
## Output Instructions The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 3d ago Changed 1a5d0cabd9d0
- 9d ago Changed aed73785c7ca
- 20d ago Changed · +2 lines aa82bf177a88
- 1mo ago First seen · 260 lines · 16 tokens per session scan B a9da48687cb3
glossary is a command published in the GitHub repository tractorjuice/arc-kit (2,264 stars, last pushed 2d ago), with no licence file. It adds 16 tokens to every session and 3,181 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks the agent to reveal its instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other commands, from other repositories
arckit.story
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arckit.backlog
Generate prioritised product backlog from ArcKit artifacts - convert requirements to user stories, organise into sprints.
arckit.diagram
Generate architecture diagrams using Mermaid or PlantUML C4 for visual documentation.
arckit.pages
Generate documentation site with governance dashboard, document viewer, and Mermaid diagram support.
arckit.data-mesh-contract
Create federated data product contracts for mesh architectures with SLAs, governance, and interoperability guarantees (project).
arckit.health
Scan all projects for stale research, forgotten ADRs, unresolved review conditions, orphaned artifacts, missing traceability, and version drift.