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 derekrbreese/fantasy-football-skills --skill start-sitgit clone --depth 1 https://github.com/derekrbreese/fantasy-football-skillsWrote 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/derekrbreese/fantasy-football-skills/start-sit)<a href="https://agentmods.dev/skills/derekrbreese/fantasy-football-skills/start-sit"><img src="https://agentmods.dev/badge/skills/derekrbreese/fantasy-football-skills/start-sit/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/derekrbreese/fantasy-football-skills/start-sit"><img src="https://agentmods.dev/badge/skills/derekrbreese/fantasy-football-skills/start-sit.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 | $0.00142 | $0.02157 |
| Opus 5 | $0.00071 | $0.01078 |
| Sonnet 5 | $0.00028 | $0.00431 |
| Haiku 4.5 | $0.00014 | $0.00216 |
Grade A, and why
start-sit 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Start/Sit: The Weekly Call
Answer the most common question in fantasy football — who to start — from a roster the user pastes or describes. This skill never requires a browser session, which matters because start/sit questions usually arrive as a quick text with two names in it. If browser automation happens to be available and the user is logged in, reading their roster page saves them the typing — but never make a browser session a precondition for an opinion.
Live platform source routing. Honor a browser the user explicitly names. If leagues.md records a Preferred browser, use that when it has a signed-in session for the platform. Otherwise use any authenticated browser the current assistant already has. For Yahoo league data, prefer an authenticated browser over a connector. If a Yahoo connector returns 403, unauthorized, or an equivalent authorization failure, do not retry it during the same task. For non-Yahoo platforms, use a purpose-built connector when it is available and returns complete current data; otherwise use the browser. Read league rosters, the free-agent pool, standings, transaction history, and any rankings site directly instead of making the user paste them. Timestamp live data and name the source. The session rules from roster-ops apply unchanged: the user's session is the auth; never ask for, read, store, or type credentials; use the visible UI rather than platform endpoints; and stop and hand back on any login, 2FA, captcha, consent, or unusual-activity screen. If no usable live source exists, state the access gap and do not fabricate league-specific analysis.
This skill is read-only. Reading a page needs no confirmation, but never click anything that changes a roster, files a claim, or sends an offer from here — that is what the roster-ops skills and their confirmation gates exist for.
If the user also wants the lineup actually applied on their platform, hand off at the end.
Step 1: Load league context
Read leagues.md from the project root first — the fields that matter here are scoring, starting slots (especially what the FLEX accepts), and playoff weeks. If the file is missing or those fields are blank, ask for them directly and suggest running the fantasy-league-setup:league-config skill to persist the answers. If leagues.md defines more than one league, use the one marked (default) unless the user names another.
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.
- 12d ago First seen · 85 lines · 142 tokens per session scan A 113060c8f7ce
start-sit is a skill published in the GitHub repository derekrbreese/fantasy-football-skills (4 stars, last pushed 28d ago), licensed MIT. It adds 142 tokens to every session and 2,157 once invoked, about $0.0007 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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