# second day (blogs) — RSS Amplifier Recent posts from the 3 feeds in the RSS Amplifier directory that cover second day. Page: Feed: --- ## [A paper reproducibility agent: PDF in, report out](https://blog.jasony.me/posts/2026-08-16-paper-reproducibility-agent.html) _2026-08-16 · Juncheng Yang_ We turned the MLSys'26 AE agent's core into a standalone paper reproducibility agent. Give it a paper PDF; it finds the repo, installs and runs it, and adjudicates the paper's claims. ## [Same open weights, prompt-cache lifetimes from seconds to a day](https://blog.jasony.me/posts/2026-08-12-prefix-cache-retention-open-weight.html) _2026-08-12 · Juncheng Yang_ Across 23 providers serving two open-weight models, prompt-cache retention ranged from under 30 seconds to more than a day. Even for the same model, the serving stack determined the cache. ## [Midnight on the Dragon Tower](https://thousandtales.substack.com/p/midnight-on-the-dragon-tower-3d7) _2026-08-10 · Alex Evans · A Thousand Tales_ Ceremonial Third Day ## [Deploying an artifact-evaluation agent at MLSys'26](https://blog.jasony.me/posts/2026-08-09-deploying-an-ae-review-agent.html) _2026-08-09 · Juncheng Yang_ We deployed a tool-using agent on the MLSys'26 AE HotCRP as a real reviewer. Across its completed reviews, it usually scored within one point of its human co-reviewers. ## [Measure first, design second](https://blog.jasony.me/posts/2026-08-08-measurement-first-systems-research.html) _2026-08-08 · Juncheng Yang_ AI is making solutions cheaper, but it is not making important problems easier to find. Measurement is how systems research discovers what matters. ## [The Dungeon Crawl Which Has Been Running Every Summer Since 1990](https://thousandtales.substack.com/p/the-dungeon-crawl-which-has-been) _2026-08-04 · Alex Evans · A Thousand Tales_ Fort Boyard ## [Proprietary prompt caches expire in minutes, not hours — cheap per token doesn't mean a cheap bill](https://blog.jasony.me/posts/2026-08-04-prefix-cache-retention-proprietary.html) _2026-08-04 · Juncheng Yang_ OpenAI, Gemini, Anthropic, and xAI all cache your prompt prefix — but the probe that caught open-weight backends holding prefixes for hours catches the big proprietary APIs letting go in 5 to 30 minutes. ## [Midnight on the Dragon Tower](https://thousandtales.substack.com/p/midnight-on-the-dragon-tower-53e) _2026-07-25 · Alex Evans · A Thousand Tales_ Ceremonial Second Day ## [Your LRU cache is working too hard](https://blog.jasony.me/posts/2026-07-23-lazy-promotion-cache-eviction.html) _2026-07-23 · Juncheng Yang_ Across 6,357 production traces, most LRU promotions did little useful work. Delaying the decision made caches faster without making them less effective. ## [The Cursed Object Aisle](https://thousandtales.substack.com/p/the-cursed-object-aisle) _2026-07-19 · Alex Evans · A Thousand Tales_ A Trip Through Vide-Greniers ## [100,000 Bonus Points Await You (Sponsored)](https://crawlproof.com/a/SFpzd1Kv6Rs4) _2026-07-19 · **Sponsored**_ Earn 100,000 bonus points after spending $5,000 in the first 3 months. ## [Midnight on the Dragon Tower](https://thousandtales.substack.com/p/midnight-on-the-dragon-tower-b2f) _2026-07-10 · Alex Evans · A Thousand Tales_ Ceremonial First Day ## [Authorship inflation at OSDI: counting papers two ways](https://blog.jasony.me/posts/2026-07-10-osdi-authorship-inflation.html) _2026-07-10 · Juncheng Yang_ OSDI author lists have more than doubled since 1994. Whether the field's most prolific authors are actually publishing more depends on whether a paper counts as one, or as one divided by its author count. ## [The Real Dragon's Hoard](https://thousandtales.substack.com/p/the-real-dragons-hoard) _2026-07-03 · Alex Evans · A Thousand Tales_ The Dynastic Jewels Exhibition [Listen](https://api.substack.com/feed/podcast/204972035/069f5dfd48ec9196ecb289e064858d4c.mp3) ## [Midnight on the Dragon Tower II](https://thousandtales.substack.com/p/midnight-on-the-dragon-tower-ii-fdf) _2026-06-25 · Alex Evans · A Thousand Tales_ The Windworker ## [Why I'm Skeptical about writing with AI, episode 2](https://thousandtales.substack.com/p/why-im-skeptical-about-writing-with-b24) _2026-06-18 · Alex Evans · A Thousand Tales_ Comparative Style Analysis ## [Why I'm Skeptical About Writing With AI](https://thousandtales.substack.com/p/why-im-skeptical-about-writing-with) _2026-06-03 · Alex Evans · A Thousand Tales_ No, not for the usual reasons ## [Make model precision elastic](https://blog.jasony.me/posts/2026-05-24-make-model-precision-elastic.html) _2026-05-24 · Juncheng Yang_ MorphServe temporarily converts selected model layers into KV-cache headroom when traffic spikes, then restores full precision when the pressure passes. ## [Why FIFO is (almost) all you need for cache eviction](https://blog.jasony.me/posts/2026-05-20-fifo-is-all-you-need.html) _2026-05-20 · Juncheng Yang_ LRU tries to rank everything. Production traces showed that caches need something simpler: reject one-hit objects quickly and delay promotion until it matters. ## [What I look for in systems research students](https://blog.jasony.me/posts/2026-01-02-advice-for-prospective-students.html) _2026-01-02 · Juncheng Yang_ I am looking for curious, persistent students who want to build real systems. Here is what the work requires and how to write an email I will read carefully.