Append-only JSON ledger of every value-relevant change to tracked AI coding plans: price moves, usage-ceiling and rate-limit changes, model additions and removals, plan launches and discontinuations, subscriber-affecting policy changes. Each entry dated, with old/new values, source URL, and verification date. Use it to track how plan value shifts over time.

Per-provider JSON cost rules for computing requests-per-dollar on AI coding plans: per-token USD rates or credit budgets with per-model rates, 5h/weekly credit limits, monthly per-model caps, and confidence levels (exact/proxy). The input dataset for a subscription cost calculator.

Full JSON catalog of verified AI coding-subscription plans across 31 providers (Claude, OpenAI, Cursor, Gemini, and more). Each record: monthly price and cadence, included models, usage ceilings and rate-limit windows, coding-tool lock-in, and pricing provenance with lastChecked dates. Use it to pick the right plan for an agent workload or to compare providers.