Category
AI & Development
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N° 001Latest dispatch
The Invisible Tax: Hidden Quota Burns and Phantom Rate Limits in Claude Code
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 that continuously cleared thinking on
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N° 002AI & Development
The Bugs Go Deeper: Silent Context Degradation in Claude Code
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
8 min read -
N° 003AI & Development
What Debugging Claude Code’s Cache Taught Us About AI Tooling Economics
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
8 min read -
N° 004AI & Development
Images That Won’t Die and Directories That Shouldn’t Be There
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
7 min read -
N° 005AI & Development
The Undocumented TTL Downgrade: How Exceeding Your Quota Makes Everything Worse
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
10 min read -
N° 006AI & Development
How to Get 99.5% Cache Hit Rate on Your Claude Code Subscription
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
10 min read -
N° 007AI & Development
What Does 5x Actually Mean?
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,
10 min read -
N° 008AI & Development
The Three-Layer Gate: What Actually Happens When You Cross Your Claude Code Quota
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
25 min read -
N° 009AI & Development
The 5-Minute Baseline: What We Found in Claude Code’s Tools Array
Update (2026-04-13): Our original recommendation to pin Claude Code to v2.1.81 is now outdated.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
17 min read -
N° 010AI & Development
Building a Fetch Interceptor to Fix Claude Code’s Cache — Without Touching Claude Code
In Part 2, we mapped out three bugs that break Claude Code's prompt caching: resume block scatter, fingerprint instability, and non-deterministic tool ordering. Each one
8 min read -
N° 011AI & Development
How Claude Code’s Prompt Cache Actually Works — And Three Ways It Breaks
In Part 1, we showed that Claude Code sessions were burning through quota at 26-28% per turn — because the prompt cache was being rebuilt
7 min read -
N° 012AI & Development
We Taught Our AI Agents to Take Coffee Breaks (And It Saved Us Real Money)
We Taught Our AI Agents to Take Coffee Breaks (And It Saved Us Real Money) Here's something nobody tells you about Claude Code: when you
8 min read