Most responses leave out rules. Linear publishes some rules on its own brand page (linear.app/brand). The page says which colors to use with the wordmark. It also says that nobody can alter its graphics or use them to imply endorsement.
None of the observed endpoints, which read the public website, returned these rules. One of them carried a rule-like field of its own. The two maintained responses, prepared from sources added for the brand, carried naming rules, logo rules, and claim limits.
| Endpoint | Key | What it returned for linear.app |
|---|---|---|
| Brandfetch Brand Context API | brand.voice.avoid |
["breathless hype", "folksy banter"] |
| Rainbrand Brand Skill | references/copywriting.md |
Write "Linear" with a capital L. Never "Linear app" or lowercase "linear" |
| Rainbrand Brand Skill | references/logo.md |
Keep the artwork intact. Do not combine it with other graphics or imply endorsement |
| Rainbrand Brand Skill | references/positioning.md |
"Ground claims in specific workflows", and use the legal entity name in legal writing |
| Rainbrand Brief | guidance |
The source text that limits claims about Loops, a date limit, and the claims that the hero copy and image must not make |
The Brandfetch Brand API, Context.dev, Firecrawl, and Logo.dev returned no rules.
get_brief over MCPRainbrand Brief{"status": "completed","skill_id": "e16b6239-d74f-4922-97c1-d65c6ae3d882","guidance": "… As of November 11, 2026, do not call it newly launched, upcoming, or a first-time release unless independently verified …"1The task said "announcing". Loops launched in July.}Task limits
The Brief above was for a hero section that announces Loops, a Linear feature. Linear announced Loops on 20 July 2026. We added the Linear brand to Rainbrand from linear.app on 15 October, and its sources did not mention Loops. A Brief from that version treated the feature as the premise of the task, not as a fact.
On 11 November, we added the Loops announcement to the brand. The next Brief quoted it as the limit for claims: "Loops let you define scheduled or event-driven operations for Linear Agent to run across your workspace." It also listed what not to claim: "integrations, pricing, availability/access, setup, permissions, performance, outcomes, or degree of autonomy". The Brandfetch Brand Context API, read on 16 October, listed Loops with a price. See Dates and versions.
How to pass rules to a model
- State each rule as an instruction on its own line in the system prompt, for example "Write 'Linear' with a capital L."
- Put claim limits next to the task, not in a general brand section. The limits change with each piece of work.
- If no endpoint gives you rules, write the few rules that your product needs: naming, legal lines, and what the company does not offer. The system prompt template has a place for them.
Last updated 12 November 2026