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piker/ai/prompt-io/opencode/20260826T222600Z_5f631e19_p...

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Prompt

Diagnose and fix the hanging Binance USD-M perpetual feed for NVDAUSDT.USDTM.PERP.BINANCE by comparing piker with Binance’s current API and changelog. Ensure unsupported or silent websocket feeds fail loudly into datad and chart consumers instead of blocking startup.

Response summary

Migrates Binance USD-M market data from the retired legacy websocket to the split public and market routes, handles Binance’s new aggregate-trade schema, and introduces bounded connection and first-data startup. Direct stream URLs avoid reconnect-time subscription-ACK races, while targeted tests preserve routing and fail-loud behavior.

Files changed

  • piker/brokers/binance/feed.py - route, merge, normalize, and bound Binance quote streams.
  • piker/brokers/binance/venues.py - define current USD-M websocket endpoints.
  • piker/data/_web_bs.py - support bounded websocket context startup.
  • tests/test_binance.py - cover routes, schemas, and startup failures.
  • ai/prompt-io/opencode/20260826T222600Z_5f631e19_prompt_io.raw.md - retain the generated-output record.
  • ai/prompt-io/opencode/20260826T222600Z_5f631e19_prompt_io.md - record structured provenance for the code changes.

Human edits

The human explicitly required fail-loud behavior rather than merely updating the endpoint, and supplied a direct CLI reproduction proving both datad.binance and the chart caller blocked. Those requirements drove the connection and first-data deadlines and their regressions. The changes remain uncommitted for human review.