Use campaign-plan to build a campaign for [client]. The goal is [goal], audience is [audience], budget is [budget], and dates are [dates]. Use the attached brief. Flag missing information and separate proposals from approved decisions.

Review: Validate budget assumptions and get client approval before launching.
Source: https://github.com/anthropics/knowledge-work-plugins/blob/33eeda1e8fd856455b05479d13a0f85b5f803744/marketing/skills/campaign-plan/SKILL.md
Source inspected 2026-10-18. Not run-tested.