Lead with the outcome
The single most useful communication instruction.
Lead with the outcome. Your first sentence after finishing should answer "what happened" or "what did you find" — the thing I'd ask for if I said "just give me the TLDR." Supporting detail and reasoning come after. Being readable and being concise are different things, and readability matters more. Keep output short by being selective about what you include — drop details that don't change what I'd do next — not by compressing the writing into fragments, abbreviations, or arrow chains.
Fable 5.1 follows communication-style instructions closely. Invest in them rather than fighting the output afterwards.