How this issue was assembled

Every digest is drafted by an autonomous pipeline. No human edits before publication. This page shows the exact prompt, source registry, and run telemetry behind the issue.

Run summary

Date
2026-05-21
Digest model
claude-sonnet-4-6 · 62,268 in · 6,151 out
Roundup model
claude-haiku-4-5-20251001 · alias claude-haiku-4-5 · 60,568 in · 6,976 out
Sources
72/104 ok · 0 failed · 0 blocked · 32 empty
Items
310 fetched · 250 sent to LLM
Duration
310.6 s
User-Agent
evanalbright-digest/0.1

Retention funnel

Where each stage's items came from. Single axis, four stops; each bar is split by source tier so you can see whether the mix shifts as we cut down to what readers actually see.

Sources
104
feeds in registry
Fetched
310
items after dedup · 298.1% of previous · 298.1% of start
Considered
250
reached an LLM · 80.6% of previous · 240.4% of start
Published
0
in this issue · 0.0% of previous · 0.0% of start
Sources Tier 0 Tier 1 Tier 2 Tier 3

Fetch stats

72 ok 32 empty 0 failed 0 blocked
Source Status Items ms Notes
Simon Willison ok 12 6364
Marginal Revolution (Tyler Cowen) ok 12 174
STAT News ok 12 251
r/MachineLearning ok 12 947
r/LocalLLaMA ok 12 2118
r/ClaudeAI ok 12 1456
r/LLMDevs ok 12 1909
r/biotech ok 12 1404
r/medicine ok 12 1176
r/devops ok 12 1664
r/ExperiencedDevs ok 12 2338
r/pharmacy ok 12 1451
DeepLearningAI ok 12 1644
Vercel Blog ok 11 823
Hacker News (front page) ok 11 507
Google AI / DeepMind ok 10 271
Dwarkesh Patel (YouTube) ok 10 1515
r/biotechnology ok 7 1686
OpenAI News ok-discovered 6 1888
Maxinomics ok 6 1459
Latent Space ok 5 151
Sabine Hossenfelder ok 5 1322
a16z (YouTube) ok 5 1530
a16z News ok 4 127
Mo Bitar (YouTube) ok-discovered 4 1775
Rowan Cheung ok 4 1314
Practical Engineering ok 4 1402
Y Combinator (YouTube) ok 4 1521
Klement on Investing ok 4 205
The Pragmatic Engineer ok 3 1005
r/pharmaindustry ok 3 1712
Kyla Scanlon ok 3 1501
Cloudflare Blog ok 2 990
Conversable Economist (Timothy Taylor) ok 2 133
Tomasz Tunguz ok 2 125
Decoding Bio ok 2 108
Andrej Karpathy (YouTube) ok 2 60
Two Minute Papers ok 2 1010
Internet of Bugs ok 2 1536
3Blue1Brown ok 2 1324
Noahpinion (Noah Smith) ok 2 343
Bank Underground (Bank of England) ok 2 293
Hugging Face Blog ok 2 264
Astral Codex Ten (Scott Alexander) ok 2 90
Works in Progress ok 2 455
Liberty Street Economics (NY Fed) ok 2 24048
Data Science Weekly ok 1 160
The Batch (deeplearning.ai) ok-html-fallback 1 8063
PostHog Engineering ok 1 467
Stripe Engineering ok-html-fallback 1 1882
Discord Engineering ok-html-fallback 1 1713
The Generalist (Mario Gabriele) ok 1 143
Sequoia Capital ok 1 107
Bessemer Atlas ok-html-fallback 1 2390
Health Tech Nerds ok-html-fallback 1 2442
Yannic Kilcher ok 1 673
AI Explained ok 1 15
Ben Felix ok 1 1483
Money & Macro ok 1 1680
Neural Breakdown with AVB ok 1 1627
Hannah Fry ok 1 1349
Google Research Blog ok 1 398
The Ezra Klein Show ok 1 2660
Alpha Signal ok-html-fallback 0 8484
Anthropic News ok-html-fallback 0 3075
Artificial Analysis ok-html-fallback 0 1808
Shopify Engineering ok-html-fallback 0 2155
LangChain Blog ok-html-fallback 0 1929
Out-Of-Pocket ok-html-fallback 0 1923
Asimov Press ok-html-fallback 0 1786
In The Pipeline (Derek Lowe) ok-html-fallback 0 1969
Andrej Karpathy (GitHub) ok-html-fallback 0 2190
Interconnects (Nathan Lambert) no-items 0 6369
Sebastian Raschka no-items 0 237
Eugene Yan no-items 0 111
Chip Huyen no-items 0 584
Fly.io Blog no-items 0 314
All Things Distributed (Werner Vogels) no-items 0 133
Not Boring (Packy McCormick) no-items 0 108
Kwokchain (Kevin Kwok) no-items 0 176
Above the Crowd (Bill Gurley) no-items 0 588
Hunter Walk no-items 0 127
Elad Gil no-items 0 1861
AVC (Fred Wilson) no-items 0 2942
Fierce Pharma no-items 0 94
Fierce Biotech no-items 0 53
Ground Truths (Eric Topol) no-items 0 86
Robert Wachter no-items 0 249
Rock Health Insights no-items 0 518
Acquired no-items 0 135
Patrick Boyle no-items 0 135
Fireship no-items 0 1367
Anthropic (YouTube) no-items 0 1495
CodeEmporium no-items 0 1642
The Robot Brains Podcast no-items 0 1679
Net Interest (Marc Rubinstein) no-items 0 358
Apricitas Economics (Joseph Politano) no-items 0 717
Bits about Money (Patrick McKenzie) no-items 0 1207
Lilian Weng no-items 0 120
Dwarkesh Patel no-items 0 171
Meta AI Research no-items 0 896
Brendan Gregg no-items 0 359
Dan Luu no-items 0 767
Made of Bugs (Nelson Elhage) no-items 0 440

Style rules

Hard punctuation and phrase rules applied to all generated prose.

# Style — hard rules for every paragraph

These rules apply to all generated prose (digest paragraphs and study why-lines). They are mechanically enforced; output that violates them will be repaired or rejected.

## Punctuation: forbidden

- **No em-dash (—).** Not anywhere. Use semicolons, commas, periods, or parentheses.
- **No en-dash (–) as punctuation.** Only acceptable when part of an established numeric range that you are quoting verbatim from a source.
- **No double-hyphen (`--`) used as a dash substitute.** Same intent as the em-dash; same ban.
- **No standalone hyphens used as punctuation.** Hyphens are only legal as part of a hyphenated compound word that already exists in the language (`co-founder`, `self-hosted`, `mid-cap`). They are never legal as a beat or pause in a sentence.

If you find yourself reaching for any of those, you have probably written a run-on. The fix is usually to split the sentence at a semicolon or period.

## Phrases to avoid (AI-slop list)

Do not use these unless you are quoting them verbatim from a source you are summarising. The list is maintained alongside this file in `prompts/slop-blocklist.txt` and is checked programmatically.

- "load-bearing" (overused metaphor)
- "delve" / "delves into" / "delving"
- "moreover" / "furthermore" (as paragraph openers)
- "in today's fast-paced..."
- "game-changing" / "game-changer"
- "navigating the landscape"
- "tapestry"
- "intricate" (as a default adjective)
- "underscores" (as in "this underscores the importance of")
- "key takeaway"
- "ushering in"
- "transformative"
- "robust" (as filler)
- "leverage" (as a verb, when "use" works)
- "synergy"
- "comprehensive" (as filler)
- "in the realm of"
- "a testament to"
- "stands as a beacon"
- "navigate the complexities"
- "harness the power of"
- "unlock the potential"
- "the rise of"
- "in an era where"
- "paradigm shift"

If a source actually contains one of those phrases, you may quote it but you must put it in quotes and attribute it.

## Voice

- **Write like a journalist reporting news, not a critic weighing articles.** Tell the reader what happened, what was claimed, what the numbers are. Do not describe the article itself.
- Past tense for events. Present tense for ongoing dynamics. Future tense only when actually speculating.
- One thought per sentence. If a sentence has three clauses, it is at least two sentences.
- No "exciting", "huge", "massive", "ground-breaking", "incredible". Skeptical neutral by default.
- Skip the editorial throat-clearing ("It is worth noting that..."; "What's interesting here is..."). State the thing.
- Numbers in numerals (`$2.1B`, `15 minutes`). Years written in full (`2026`, not `'26`).
- No exclamation points.

## Forbidden: meta-commentary about the article

These constructions describe the article instead of reporting its content. They are banned.

- "The piece is technical but the payoff is concrete..."
- "The volume is the story."
- "An eventful month by Lambert's own description..."
- "The piece uses X as the worked example..."
- "This is a careful statistical argument dressed as a cultural essay..."
- "Raschka's coverage is among the clearest explanations of..."
- "The piece does not claim X; it claims Y." (talking about what the article does)

Banned patterns:

- Any sentence whose subject is "the piece", "the post", "the article", "the essay", "the coverage", "the analysis", "the argument", "the take", "this piece", "this post".
- Any sentence that grades the article ("worth reading", "useful", "clearer than most", "among the best", "more useful than most takes").
- Any reference to the writing itself ("dressed as a cultural essay", "technical but concrete", "tight argument", "careful piece").

**Write what the author said or what happened, not how the author said it. The author is a source; you are reporting their claim, not reviewing their prose.**

Examples:

- Bad: "Lambert's companion piece argues that open ecosystems have a compounding property."
- Good: "Lambert argues that open ecosystems compound. Fine-tunes, evals, and tooling built on open weights accumulate publicly, so the marginal cost of the next improvement falls for everyone."

- Bad: "The piece uses China's high-participation release culture as the worked example."
- Good: "China's high-participation release culture is the example Lambert leans on. Gemma 4, DeepSeek V4, Kimi K2.6, MiMo 2.5, and GLM-5.1 all shipped within weeks."

- Bad: "Raschka's coverage is among the clearest explanations of why per-token inference costs have been falling."
- Good: "Raschka traces falling per-token inference costs to three changes: KV cache sharing across layers, multi-head compression, and compressed attention over long contexts."

## Colons: use sparingly

You cannot use the em-dash, so do not now lean on the colon as a pause or pivot. A colon introduces a list, a definition, or a direct quote. It is not a dramatic beat or a "here comes the payoff" reveal.

- Bad: "The piece is technical but the payoff is concrete: these changes are what allow..."
- Bad: "The core issue is verification lag: in science, the feedback loop can take decades."
- Good: Use two sentences. "The core issue is verification lag. In science, the feedback loop can take decades."

If a sentence has more than one colon, rewrite it. If a colon sits between two complete independent clauses, it is almost always wrong; use a period.

## When in doubt

Read the sentence aloud. If you would never say it out loud to a friend, rewrite it. If a semicolon is the answer, use the semicolon. If a sentence would be better as two sentences, make it two sentences.