How do I install the Cross Poster Blurb skill?

Run npx skillmds add lyndonkl/cross-poster-blurb in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Cross Poster Blurb safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Cross Poster Blurb?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Cross Poster Blurb free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Cross Poster Blurb?

lyndonkl (@lyndonkl) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Cross Poster Blurb by lyndonkl — Agent Skill

Name: Cross Poster Blurb
Rating: 4.5 (4 reviews)
Author: lyndonkl

Cross Poster Blurb

Writes 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.

lyndonkl 19131d2 2.8 KB Updated Sep 9, 2026

File contents

Cross-Poster Blurb

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.

---name: cross-poster-blurbdescription: Writes 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.--- # Cross-Poster Blurb ## 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 ```markdown --- 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) ```markdown --- 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 1. Third person throughout. Never "I argue…" — the blurb will be pasted by another writer. 2. 60-140 words. Substack's cross-post popup is small; shorter reads. 3. Never say "amazing," "brilliant," "must-read" — the other writer sounds like a fan, not a curator. 4. No subscriber CTA ("subscribe to From First Principles"). Just positioning. 5. Preserve paper attributions. 6. If the essay is in a specific section, the blurb can reference the section's promise subtly — not as "Filed under." 7. Voice register: neutral-analytical. Not the writer's confessional register; the blurb represents the piece to strangers.

Frequently asked questions