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
2026-05-15
Digest model
claude-sonnet-4-6 · 16,351 in · 3,040 out
Roundup model
claude-haiku-4-5-20251001 · 17,013 in · 1,813 out
Sources
50/68 ok · 1 failed · 0 blocked · 17 empty
Items
252 fetched · 150 sent to LLM
Duration
98.7 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
68
feeds in registry
Fetched
252
items after dedup · 370.6% of previous · 370.6% of start
Considered
150
reached an LLM · 59.5% of previous · 220.6% 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

50 ok 17 empty 1 failed 0 blocked
Source Status Items ms Notes
Simon Willison ok 12 102
OpenAI News ok-discovered 12 1851
Endpoints News ok 12 407
STAT News ok 12 211
r/MachineLearning ok 12 906
r/ClaudeAI ok 12 1390
r/LocalLLaMA ok 12 1484
r/LLMDevs ok 12 1513
r/medicine ok 12 781
r/biotech ok 12 1436
r/ExperiencedDevs ok 12 1553
r/devops ok 12 1812
r/pharmacy ok 12 1344
Vercel Blog ok 9 297
Hacker News (front page) ok 8 301
The Economist — Finance & Economics ok 7 98
Latent Space ok 7 154
Stratechery (Ben Thompson) ok 5 49
Mo Bitar (YouTube) ok-discovered 5 3005
r/biotechnology ok 5 1572
Tomasz Tunguz ok 4 148
Two Minute Papers ok 4 1391
r/pharmaindustry ok 4 1729
Data Science Weekly ok 3 69
The Pragmatic Engineer ok 3 74
Cloudflare Blog ok 3 392
Google AI / DeepMind ok 2 221
Not Boring (Packy McCormick) ok 2 91
Ground Truths (Eric Topol) ok 2 90
Andrej Karpathy (YouTube) ok 2 227
Yannic Kilcher ok 2 1330
Interconnects (Nathan Lambert) ok 1 121
The Batch (deeplearning.ai) ok-html-fallback 1 1782
Alpha Signal ok-html-fallback 1 2059
Artificial Analysis ok-html-fallback 1 1759
Stripe Engineering ok-html-fallback 1 1827
Shopify Engineering ok-html-fallback 1 2029
Discord Engineering ok-html-fallback 1 1685
LangChain Blog ok-html-fallback 1 1853
Hunter Walk ok 1 89
Bessemer Atlas ok-html-fallback 1 2210
a16z News ok-html-fallback 1 2046
Anthropic News ok-html-fallback 1 9133
Health Tech Nerds ok-html-fallback 1 2040
Out-Of-Pocket ok-html-fallback 1 1845
Decoding Bio ok 1 69
In The Pipeline (Derek Lowe) ok-html-fallback 1 1779
Asimov Press ok-html-fallback 1 1735
Andrej Karpathy (GitHub) ok-html-fallback 1 2452
BioCentury ok-html-fallback 1 3044
Sebastian Raschka no-items 0 109
Eugene Yan no-items 0 77
Chip Huyen no-items 0 484
Fly.io Blog no-items 0 119
Netflix TechBlog rss-error 0 230 The XML document is not well-formed
PostHog Engineering no-items 0 191
All Things Distributed (Werner Vogels) no-items 0 50
The Diff (Byrne Hobart) no-items 0 79
The Generalist (Mario Gabriele) no-items 0 116
Kwokchain (Kevin Kwok) no-items 0 109
Above the Crowd (Bill Gurley) no-items 0 67
Elad Gil no-items 0 1766
AVC (Fred Wilson) no-items 0 2454
Fierce Pharma no-items 0 85
Fierce Biotech no-items 0 78
Robert Wachter no-items 0 63
Rock Health Insights no-items 0 498
Acquired no-items 0 111

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.