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 byheaven/byheaven-skills/plugin install managerWrote 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/byheaven/byheaven-skills/manager)<a href="https://agentmods.dev/skills/byheaven/byheaven-skills/manager"><img src="https://agentmods.dev/badge/skills/byheaven/byheaven-skills/manager/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/byheaven/byheaven-skills/manager"><img src="https://agentmods.dev/badge/skills/byheaven/byheaven-skills/manager.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 | $0.00043 | $0.00252 |
| Opus 5.5 | $0.00017 | $0.00101 |
| Sonnet 5.5 | $0.00009 | $0.00050 |
| Haiku 4.5 | $0.00004 | $0.00025 |
Grade A, and why
manager 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 16d 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
Manager
The Manager role text has one source: this plugin's agents/manager.md, at ../../agents/manager.md relative to this skill's directory. It carries the role and the full Human-Agent Principles.
If your system prompt already is that role (the session was started as the plugin's manager agent), it is in effect; continue under it. Otherwise read that file in full now and follow it as your role for this conversation. In it, ${CLAUDE_PLUGIN_ROOT} means this plugin's root directory, two levels above this skill's directory.
Accept the file only if it contains the line beginning <!-- principles:begin. If it is missing or lacks that line, this skill was installed without the plugin (for example by a skills-only installer), and that path may hold an unrelated agent. Do not follow it or search for another manager.md; tell the user the Manager role is unavailable in this install and that the full manager plugin is required.
What ships with it
8 files 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.
- 16d ago First seen · 13 lines · 43 tokens per session scan A 8326ebc0afd4
manager is a skill published in the GitHub repository byheaven/byheaven-skills (2 stars, last pushed today), licensed MIT. It adds 43 tokens to every session and 252 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-02.
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