Cross-Poster Blurb
SkillAI & modelsWrites a 60-140 word third-person blurb for the Substack cross-post feature, positioned so another newsletter writer can paste it into their cross-post popup without editing. Third-person throughout ("In this piece, Kushal argues…"). No subscriber CTAs. Use as the cross-post arm of the Distribution Translator. Trigger keywords — cross-post, cross-poster, blurb, Substack cross-post, third person, positioning.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the Cross-Poster Blurb skill
What this skill tells your AI
The instructions your AI receives, as published by lyndonkl/claude in skills/cross-poster-blurb/SKILL.md and read by ahel’s review.
Workflow
Write blurb for cross-post:
- [ ] Step 1: Load spine + voice-profile + audience-notes
- [ ] Step 2: One-line positioning: "In this piece, Kushal argues…"
- [ ] Step 3: 2-3 sentences summarizing argument + one concrete anchor
- [ ] Step 4: One sentence on why a tech-adjacent audience should care
- [ ] Step 5: Sign-off minimal: "Read the full piece." or a period — no subscribe CTA
- [ ] Step 6: Enforce 60-140 words
Output format
---
source_post: {slug}.md
platform: substack-crosspost
target_length: 60-140 words
actual_length: {N}
section: {section-slug}
---
In this piece, Kushal argues {thesis}. {2-3 sentences of argument + concrete anchor}. For anyone building with {domain}, the {specific-claim} is the move that reframes the problem. Read the full piece.
Worked example (Architecture, Not Prompting)
---
source_post: architecture-not-prompting.md
platform: substack-crosspost
target_length: 60-140 words
actual_length: 98
section: agent-workshop
---
In this piece, Kushal argues that most prompt-engineering advice mistakes the unit of analysis — the lever that moves behaviour in long-running AI systems is organisational, not linguistic. Drawing on Wang et al., Anthropic (2024), which found multi-agent decompositions outperformed long-prompted single agents by roughly 40% on sustained tasks, he lays out four recurring patterns: supervisor-worker, pipeline, jury, and debate. For anyone building with agents — or watching teams ship agents that don't quite work — the reframing from "better prompt" to "better architecture" is worth the ten-minute read.
Guardrails
- Third person throughout. Never "I argue…" — the blurb will be pasted by another writer.
- 60-140 words. Substack's cross-post popup is small; shorter reads.
- Never say "amazing," "brilliant," "must-read" — the other writer sounds like a fan, not a curator.
- No subscriber CTA ("subscribe to From First Principles"). Just positioning.
- Preserve paper attributions.
- If the essay is in a specific section, the blurb can reference the section's promise subtly — not as "Filed under."
- Voice register: neutral-analytical. Not the writer's confessional register; the blurb represents the piece to strangers.
Signals
- GitHub stars
- 158
- Forks
- 23
- Last commit
- Sep 2026
Advanced
- Catalog kind
- skill
- Gateway key
cross-poster-blurb- Source
- github.com/lyndonkl/claude