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Systems, products
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Day 035 / APIs / Reliability
Retry Budget Calculator
A dependency-free Python CLI that calculates how many capped exponential-backoff retries fit inside a fixed wait budget, with an optional conservative jitter allowance.View project ↗Day 036 / APIs / Rate Limits
Rate Limit Visualizer
A dependency-free Python CLI that evaluates sanitized request timestamps against a fixed-window limit and visualizes usage, remaining capacity, status and reset timing.View project ↗Day 037 / APIs / Data Conversion
CSV-to-JSON Converter
A dependency-free Python CLI that validates UTF-8 CSV data and converts it to a JSON array or JSON Lines while preserving every field as text.View project ↗Day 038 / APIs / Data Profiling
Data Shape Profiler
A dependency-free Python CLI that profiles field presence, missing and null counts, and observed JSON types without printing source values.View project ↗Day 039 / APIs / Test Data
Mock API Fixture Builder
A dependency-free Python CLI that turns a bounded JSON blueprint into deterministic synthetic API fixtures in JSON array or JSON Lines format.View project ↗Day 040 / APIs / OpenAPI
OpenAPI Endpoint Index
A dependency-free Python CLI that turns a local OpenAPI 3.x JSON document into a deterministic, review-friendly endpoint catalog.View project ↗