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 madguyevans-creator/resale-agent-skill-hub --skill broker-authgit clone --depth 1 https://github.com/madguyevans-creator/resale-agent-skill-hubWrote 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/madguyevans-creator/resale-agent-skill-hub/broker-auth)<a href="https://agentmods.dev/skills/madguyevans-creator/resale-agent-skill-hub/broker-auth"><img src="https://agentmods.dev/badge/skills/madguyevans-creator/resale-agent-skill-hub/broker-auth/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/madguyevans-creator/resale-agent-skill-hub/broker-auth"><img src="https://agentmods.dev/badge/skills/madguyevans-creator/resale-agent-skill-hub/broker-auth.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 | $0.00108 | $0.00368 |
| Opus 5 | $0.00054 | $0.00184 |
| Sonnet 5 | $0.00022 | $0.00074 |
| Haiku 4.5 | $0.00011 | $0.00037 |
Grade A, and why
broker-auth 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
broker-auth: Bind Platform Accounts
Handles the "bind once, reuse" account authorization flow.
How It Works
- User selects platform(s) to bind (Xianyu, Zhuanzhuan, eBay, Depop)
- Script opens a Chromium browser to the platform's login page
- User logs in manually (scan QR code, enter credentials)
- Browser closes → cookies are persisted to
~/.broker/sessions/<platform>_session.json - Subsequent skills reuse the session transparently
- Sessions auto-expire after 30 days; when expired, user is prompted to re-bind
Script
python3 -m broker_core.session_manager login <platform>
# Opens browser, captures cookies, saves session
python3 scripts/auth.py # Wrapper for broker-auth flow
Important Notes
- This is NOT web scraping. The user authorizes Claude to use their own account session for search and publish operations.
- Cookie files are stored locally in
~/.broker/sessions/. Never shared. - No passwords are stored — only browser cookies.
- The session is used exclusively for: searching listings, publishing items, checking listing status, and delisting.
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 · 34 lines · 0 tokens per session scan A 9d283293a4da
broker-auth is a skill published in the GitHub repository madguyevans-creator/resale-agent-skill-hub (94 stars, last pushed 3mo ago), licensed MIT. It adds 108 tokens to every session and 368 once invoked, about $0.0005 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 2026-08-30.
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