Indie founders keep rewriting “who is this for?” in a notes app. clarify-saas-idea is a free Cursor / Claude Code Agent Skill that forces a decision-ready page: one ICP, a wedge, non-goals, MVP In/Out.
Jian AI Lab cloned commit e1e48741d6bd (GitHub id 1357550091) on 2026-09-05 and followed the README.
Install is a copy, not a PyPI package. pip install clarify-saas-idea failed in 0.992s with “No matching distribution found”. mkdir -p then cp -R skills/clarify-saas-idea into .cursor/skills, .claude/skills, and .agents/skills succeeded in 0.030s. Three SKILL.md files, 3830 bytes each, matched the source.
Empty input: the harness stopped in 0.048s with BLOCKED_MISSING_INPUTS and did not write docs/saas-one-pager.md.
Documented demo prompt (302 bytes): watch competitor pricing pages, sell to solo B2B founders, about four weekends, distribute on X. First draft at 09:44:38 was 499 English words, over the skill’s “≤ ~400 words” bar. Trimmed file at 09:45:49: 2543 bytes, 399 words, all ten required headings, seven In bullets. Wall clock from over-limit draft to passing draft: 71 seconds. We did not time a handwritten one-pager, so we do not invent that number.
Author listing mentions a paid pack; we did not pay and did not test checkout.
Repo: https://github.com/zhang7700/clarify-saas-idea
Public X archive: @KaiZhang_AI — read-only, no reply.
Lab write-up: https://jianailab.com/experiments/clarify-saas-idea-ab56a7d8
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