# Claim Writing > Blind-rewrite a citing sentence (citance) from another paper into a single atomic, independently-verifiable claim (SciFact's annotation protocol) — never looking at the cited paper's content while rewriting. Use this when you have a specific citing sentence and want it decomposed into checkable atomic claims, as the first step before rationale-selection and claim-label-prediction. - Skill: `yogsoth-ai/claim-writing` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add yogsoth-ai/claim-writing` - Raw SKILL.md: https://api.skillmd.com/api/skills/yogsoth-ai/claim-writing/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: yogsoth-ai (https://skillmd.com/u/yogsoth-ai) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/yogsoth-ai/claim-writing --- # Claim Writing Blind rewrite of a citance into an atomic verifiable claim — first step of the SciFact 3-chain. ## Execution Subagent — spawned via spawn-agent skill. ## Input Requirement This Package Cannot Auto-Supply SciFact's own method requires a citance — a sentence FROM ANOTHER PAPER that cites the paper under study. `paper-fetch` only ever retrieves the text of the single paper being read; it has no mechanism to discover or supply a citance about that paper. Callers using this SOP must supply `citance` themselves (e.g. from a specific citation-verification task they already have in hand) — this SOP cannot be exercised end-to-end starting only from a `paper_ref`, unlike every other SOP in this package. Do not "fix" this by having paper-fetch search for citing sentences; that would break paper-fetch's decoupled, single-purpose design (spec §9). ## Available SOPs | SOP | When to use | | --- | --- | | spawn-agent | Spawn a customized CC subagent with full MCP tool access. |