What a campaign needs before it can be created

Returns the full specification for one campaign type: required and optional fields, text and asset limits, the objective matrix, the minimum budget, what Adako creates in what order, and the pitfalls that cause most rejections. Free, instant, offline — it calls no platform. Use when: the user wants to create a campaign and you need to know what to ask them for; before writing any draft; when a create was rejected for a length, a count or an objective pairing. When not to use: you already have a draft — run validate_campaign_draft instead, which checks the draft against this same spec. Returns markdown tables plus the machine-readable spec. If the (platform, campaign_type) pair is unknown it errors and lists the valid pairs; it never improvises a spec for a campaign type Adako has not encoded.