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 Advent-AI/truenorth-cli --skill truenorthgit clone --depth 1 https://github.com/Advent-AI/truenorth-cliWrote 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/advent-ai/truenorth-cli/truenorth)<a href="https://agentmods.dev/skills/advent-ai/truenorth-cli/truenorth"><img src="https://agentmods.dev/badge/skills/advent-ai/truenorth-cli/truenorth/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/advent-ai/truenorth-cli/truenorth"><img src="https://agentmods.dev/badge/skills/advent-ai/truenorth-cli/truenorth.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 | $0.00017 | $0.00282 |
| Opus 5 | $0.00009 | $0.00141 |
| Sonnet 5 | $0.00003 | $0.00056 |
| Haiku 4.5 | $0.00002 | $0.00028 |
Grade A, and why
truenorth 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 10d 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
TrueNorth agent tools
Use the CLI's runtime discovery instead of assuming that a tool name or schema is still current.
Workflow
- Run
tn tools --json --schemato discover tools and their current schemas. - Select a tool from that response.
- Run
tn call <tool> ... --jsonfor one call, ortn batch ... --jsonfor independent calls that can run together. - Summarize the returned
resultvalues for the user.
The CLI is a thin wrapper around the agent-tools API. Never invent tool names or arguments. Refresh discovery when a call reports an unknown tool or input validation error.
See examples.md for invocation syntax.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 10d ago First seen · 27 lines · 17 tokens per session scan A 6ba99ff9a8d9
truenorth is a skill published in the GitHub repository Advent-AI/truenorth-cli (8 stars, last pushed 29d ago), licensed MIT. It adds 17 tokens to every session and 282 once invoked, about $0.0001 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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