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 lakpriya1s/agent-rack --skill session-startgit clone --depth 1 https://github.com/lakpriya1s/agent-rackWrote 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/lakpriya1s/agent-rack/session-start)<a href="https://agentmods.dev/skills/lakpriya1s/agent-rack/session-start"><img src="https://agentmods.dev/badge/skills/lakpriya1s/agent-rack/session-start/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/lakpriya1s/agent-rack/session-start"><img src="https://agentmods.dev/badge/skills/lakpriya1s/agent-rack/session-start.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 | $0.00018 | $0.00434 |
| Opus 5.5 | $0.00007 | $0.00174 |
| Sonnet 5.5 | $0.00004 | $0.00087 |
| Haiku 4.5 | $0.00002 | $0.00043 |
Grade A, and why
session-start 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 1mo 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
Start a background sub-agent session through agent-rack's agent_session_create MCP tool.
Raw slash-command arguments:
$ARGUMENTS
Parsing
Same shape as /agent-rack:run: first word is the agent id, the rest (minus flags) is the
prompt. Recognized flags: --workspace <path>, --mode <mode>.
If no agent id is given, call mcp__plugin_agent-rack_agent-rack__agent_list_available and ask rather than
guessing.
When to prefer this over /agent-rack:run
Use this instead of the synchronous /agent-rack:run when the task is long-running, or the
user wants to keep working while it runs in the background, or they'll want to send follow-up
input mid-task.
Execution
Call mcp__plugin_agent-rack_agent-rack__agent_session_create with agent and prompt, plus workspace/mode
if given. It returns immediately with a sessionId and status: "running" — it does not block.
Output
Report the sessionId clearly and tell the user how to follow up:
/agent-rack:session-status <sessionId>for current status/summary/agent-rack:session-logs <sessionId>to tail the raw event stream/agent-rack:session-send <sessionId> <message>to send follow-up input/agent-rack:session-cancel <sessionId>to stop it early
Do not poll status yourself in this command — starting the session is the entire job.
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.
- 1mo ago First seen · 42 lines · 18 tokens per session scan A 511b0eeabfbc
session-start is a skill published in the GitHub repository lakpriya1s/agent-rack (2 stars, last pushed 2mo ago), licensed MIT. It adds 18 tokens to every session and 434 once invoked, about $0.0001 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 2026-08-31.
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