Trader Copycat
The Reverse Engineer.
Install
npx skills add Jakeschincariol/trader-skill --skill trader-copycat -g -a claude-code -y- Repository
- Jakeschincariol/trader-skill1.1k
- Category
- Business
- Updated
- 21d ago
- License
- MIT
- Context cost
- Mediumabout 1,718 tokens
- Runs scripts
- Yes, review before use
What it does
The Reverse Engineer. Reads a famous investor's public SEC filings (the quarterly 13F-HR, plus Form 4 if you want the insider trades) and rebuilds their portfolio as weights you can copy: every position, its share of the fund, what they bought, added, trimmed and sold since the last quarter, with tickers matched to every CUSIP. Then it writes trader/targets.json so the budget skill can size it to your money. Use when the user says "copy Buffett", "copy Berkshire", "what does Ackman own", "reverse engineer this investor", "show me their 13F", "what did they buy last quarter", "copy the top 5", or names any fund or famous investor.
trader-copycat
Copying an investor starts with what they are legally required to show: a 13F-HR, filed with the SEC every quarter by any investment manager with over $100 million in US-listed stocks and other 13(f) securities. This skill reads it straight from SEC EDGAR, rebuilds the portfolio, and turns it into target weights for your own account.
Tool in this folder (standard library Python, no keys):
python3 "${CLAUDE_SKILL_DIR}/edgar13f.py" --help
SEC asks every program to identify itself with a name and email. Set it once
in trader/config.json ("sec_user_agent": "Your Name you@example.com", with
the user's real name and email) or export SEC_USER_AGENT=.... The tool
refuses to call SEC without it and says how to fix it. Ask the user for it;
never invent one.
What it writes
trader/targets.json: the weights to copy, in the shape every other trader skill reads:{ "source", "as_of", "weights": [ {"ticker", "name", "weight"} ] }, weights in % with 2 decimals summing to 100 over the stock sleeve (keep the 2 decimals: budget sizing needs them), plus the 13F share, value, CUSIPs, what was skipped and why, and the caveats.trader/tickers.json(optional, yours): CUSIP to ticker fixes the tool will always use first, as{"650111107": "NYT"}.
targets.example.json in this folder is the real output of the reel's run
(Berkshire, top 5).
