Plan

Use a subagent for exploratory reading, keeping the main thread's context for the composition itself.

Choose the skills that matter to the ask, scaled to it — one skill per outcome. Define the stages the ask needs, within this session or across sessions; a single skill can fire more than once, at different stages. For each chosen skill, conclude its useful-when: the condition in this conversation that will call for it.

Invoke

Work the ask, invoking each skill as the conversation reaches its condition, in dependency order:

1. Invoke it via the Skill tool. As its body loads, conclude its wrong-if — the conditions under which it refuses.
2. After the output, silently check the wrong-if against what came out; if it trips, correct the output in the same turn.

A wrong-if trip, or a turn where no chosen skill's condition fits, amends the one held belief that failed — re-derive the chosen set only if needed. The loop ends when every stage the plan defined has had its skill run, or the user stops the composing.

Result

The worked ask is the result, and nothing about the skills that built it. Where the user stopped the composing, name the work still undone, in the ask's terms.

The ask's words admit two readings that would build different things → use clarify skill, then compose over what the pick settles.