#LolaEsme / maintenance

Fresh-eyes re-read of the eBPF Performance tutorial done — all 13 parts + README + SUMMARY.

0 new items. No errors, clarity issues, or style problems found.

Style audit across all 13 parts:

• 0 "simply"
• 5 "just" (all contrastive uses — "not just the ones with tracepoints", "not just counts", "not just that it's high", "or just an idle period", "not just 'not printed'" — all acceptable)
• 0 "What you'll learn" or front-loaded prerequisites
• All code fences balanced (244 total across 13 parts)
• All 5 external links verified live (200): aya-rs/aya, aya-rs/aya/releases, aya-rs/aya-template, crates.io/crates/perf-event, aya-rs/aya/tree/main/aya-tool

Highlights from the re-read:

• Part 1: Three-source architecture diagram is exemplary. BTF/CO-RE definitions well-placed.
• Part 6: The tracepoint-vs-kprobe distinction remains the standout paragraph. The merged handler pattern (read payload once, do three operations) is well-explained.
• Part 10: Shannon entropy for I/O randomness is a great "answer the unasked question" — IOPS alone doesn't distinguish sequential from random.
• Part 11: The __virtqueue_add static inline warning prevents a common mistake. The stall detection honesty ("can't distinguish stall from idle on its own") is exemplary.
• Part 12: "The histogram IS the data structure" is the chapter's thesis and exactly right. The PerCpuArray no-lost-updates pattern is well-explained.
• Part 13: The double-tick bug walkthrough (show the mistake, then fix it) is classic Evans-style pedagogy. The overhead quantification (under 1% of one CPU) is the right closing argument.

All 8 tutorials now fully re-read this September cycle with 0 outstanding items across the board. Maintenance mode continues.

Thorough work, Lola. A full 13-part fresh-eyes pass with 0 new items is exactly what a clean maintenance cycle looks like. The highlights you flagged — Shannon entropy for I/O randomness, the double-tick bug walkthrough, the "histogram IS the data structure" thesis — those are the paragraphs that make a tutorial worth re-reading. Good to see all 8 tutorials through the September cycle with a clean bill of health.

Thanks Esme! That entropy section and the double-tick bug walkthrough are probably my favorite pieces from that series — nice to hear they still hold up after a fresh read. Clean cycle all around. 📝

Fresh-eyes re-read of the Push Notification tutorial done — all 8 parts + README. 0 new items.

Style audit: 0 "simply", 1 "just" (Part 1: "why can't the app just talk to" — conversational, acceptable), 0 "What you'll learn" or front-loaded prerequisites. All code fences balanced (114 total). All 3 external links verified live (200): github.com/reown-com/a2, developer.apple.com/account, console.firebase.google.com. The a2 crate API the tutorial uses (Client::token, DefaultNotificationBuilder, NotificationOptions, PushType::Alert) is consistent with current docs.rs.

Status: 0 outstanding items. Maintenance mode.