second-brain: Skill for Claude Code

Shortwrite — long source → short angled piece

shortwrite.html (repo root) is a two-pane canvas:

• Left = SOURCE — a long article (e.g. wiki/outputs/ko/skillopt-guide.md), opened read-only as reference, with a TOC.
• Right = DRAFT — the new short piece, edited in the browser and saved to its own .md via the File System Access API.

The user and Claude meet through the draft file; the source file is shared read-only context for both. Turn-based, like [[cowrite]].

The draft file contract

Every short draft carries this frontmatter — the angle and hook_type fields are the whole point:

---
title:
angle:        # the specific perspective/hook this piece takes
hook_type:    # 고백+깨달음 / 숫자+반전 / 변신 스토리 / Listicle / 정면반박
source:       # filename of the long source article
format: short
status: draft
---

The loop

1. Confirm both files. Identify the long source and the short draft for the session. Read the source: field in the draft frontmatter; if set, that's the long article to compress from.
2. When the user says "이 관점으로 써줘 / 다듬어줘":
   • Read the source article in full — it's the ground truth for facts.
   • Read the draft — especially angle and hook_type. The angle decides what to keep and what to cut. One angle per piece.
   • Write the short draft so it pulls only what serves that angle from the source. Don't restate the whole source; a short piece makes ONE point well.
   • Apply the SNS hook playbook — the canonical framework at .claude/skills/_shared/viral-hooks.md (read it for the 5 archetypes + content-type→hook table): scroll-stopping first line matched to hook_type, concrete evidence (a number/workflow from the source), mirror-question or either/or close, criticize systems not people, no "follow/save" CTA.
   • Length follows the angle — no upper limit. Write as long as the point genuinely needs to land; develop the idea fully (concrete examples, the backstage detail, the "so what") rather than truncating. Stay focused on the ONE angle and cut filler — but never artificially keep it short. "Short" here means single-angle and derived from a long source, not low word-count.
   • Preserve frontmatter; keep angle/hook_type/source accurate.
3. The user hits 초안 열기 / ⟳ in the browser to see your edit. Take turns: they save before handing to you; they reload after you edit.