Show HN: Hidden Tape v2 — local-first swing-trading dashboard with AI-verified whale flow

I shipped v6.4.0 of Swing Deck today, completing 3 of the 4 Hidden Tape v2 modules. Solo dev project, \~6 months building, just opened the Founding 100 program.

\*\*What it is:\*\* a local-first dashboard for US-equity swing trading. Runs as a Python HTTP server on \`localhost:8001\`, opens a browser tab against your own machine. Positions, broker tokens, AI keys all stay local; nothing proxies through me.

\*\*What just shipped (Hidden Tape v2):\*\*

1. \*\*AI verification layer\*\* — Anthropic Claude Haiku 4.5 with \`web\_search\` cross-checks the framework's whale-sentiment scores against SEC EDGAR Form 4 + 13F filings, FINRA short volume, public dark-pool aggregators. Returns agreement % + cited sources + override flags. Calibration on 6 tickers showed 35–72% agreement spread (no rubber-stamping), willing to disagree.

2. \*\*Structural classifier\*\* — TRAP / FADE / CHASE / CLEAN / NEUTRAL based on 10 local-compute S/R sources + RSI exhaustion + bar geometry + tape lean overlay. AI synthesizer generates r/R\-quantified better-entry alternatives + breaking-news risk via web\_search. Cost: \~$0.03/call.

3. \*\*SEC Form 4 insider chip\*\* — per-card chip showing 90-day insider buy/sell with $-shorthand. Free SEC EDGAR fetcher with 24h cache. Calibration on PLTR caught $435M of insider selling (Thiel + various execs) the framework alone would have missed.

\*\*Architecture trade-offs people might find interesting:\*\*

\- BYOK everywhere (Anthropic, Polygon, Databento, SEC EDGAR is free). I don't proxy or resell data.

\- Hybrid Polygon Starter ($29/mo) + Databento PAYG (\~$0-6/mo) = \~$30/mo total for the killer dark-pool tape feature, vs \~$199/mo for Polygon Advanced alone.

\- Anthropic prompt caching with \`cache\_control: ephemeral\` on the static system blocks. Caching wins are real on v6.3 ($75-110/call), modest on v6.4 ($30-36/call) because the v6.4 prompt is below Haiku's 2048-token cache minimum.

\- 429 retry/backoff with Retry-After header parsing — bounded \~3 min worst case (vs the silent 15-min hangs we saw before adding it).

\- Hallucination guard: every cited level price must match a provided level within 0.5%; every cited source must have non-empty URL/source field.

\*\*Pricing:\*\*

Free tier (5 tickers, no broker writes), $29/mo Pro standard, \*\*$14.50/mo Founding 100 locked forever\*\* for the first 100 paying users. Hard cap, then it closes. Perpetual fallback after 12 months continuous subscription (JetBrains-style).

\*\*What's still missing:\*\*

\- v6.6 Entry/Exit Optimizer (the synthesis layer that stacks v6.3 × v6.4 × v6.5 into a single TRIGGER OK/WAIT/AVOID). Shipping end of May.

\- Gamma walls as structural levels (deferred to v6.5).

\- Alpaca BYOK adapter (in progress, alternative to Databento for users with funded Alpaca brokerage).

Roadmap + technical writeup + calibration findings doc: [https://swing-deck.com](https://swing-deck.com)

Happy to discuss architecture, AI prompt design, BYOK economics, or anything in the comments.