The Index

Update (April 24, 2026): Anthropic published a post-mortem on April 23 acknowledging three issues: a reasoning effort default change (March 4–April 7), a caching bug

Previously in this series: How to Get a 99% Cache Hit Rate and Keeping Your Cache Warm with /coffee. Three things shipped in v2.1.117 that

In our cache investigation series, we documented how prompt cache bugs were causing 10-20x cost inflation on Max plans. We built a fetch interceptor to

Update (April 17, 2026): This post was drafted April 7. In the 10 days since, the investigation expanded significantly: The interceptor now fixes 8+ cache

Opus 4.7 update (April 16, 2026): This post is more urgent than when we wrote it. Opus 4.7 introduces high-resolution image support (2576px, up from

Anthropic has moved enterprise plans to per-token billing. The seat fee covers platform access; all usage across Claude, Claude Code, and Cowork is billed separately

Two Ways to Lose Your Cache: The TTL Mechanisms Nobody Told You About In Part 3, we described the quota monitoring we built into our

How to Get 99.5% Cache Hit Rate on Your Claude Code Subscription VSITS — April 2026 We just finished a 61-hour Claude Code session on

What Does 5x Actually Mean? VSITS LLC — April 2026 "That '5x' is utterly meaningless because you don't know what it's 5x of." — bakugo,

The Three-Layer Gate: What Actually Happens When You Cross Your Claude Code Quota VSITS LLC — April 2026 This post is a follow-up to Friday's

Update (2026-04-13): Our original recommendation to pin Claude Code to v2.1.81 is now outdated. Anthropic has partially fixed the resume-scatter bug in v2.1.90 and further