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opencode / packages /tui /src /context /thinking.ts

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	import { createMemo, type Setter } from "solid-js"
	import { useKV } from "./kv"

	export type ThinkingMode = "show" \| "hide"

	const MODES: readonly ThinkingMode[] = ["show", "hide"] as const

	// OpenAI's Responses API surfaces reasoning summaries that start with a bolded
	// title block: "Inspecting PR workflow\n\n<body>". Treat that first block,
	// or a complete title still awaiting its body while streaming, as disclosure
	// metadata so the TUI can style its header independently from the markdown body.
	export function reasoningSummary(text: string) {
	const content = text.trim()
	const match = content.match(/^\\([^\n]+)\\*(?:\r?\n\r?\n\|$)/)
	if (!match) return { title: null, body: content }
	return { title: match[1].trim(), body: content.slice(match[0].length).trimEnd() }
	}

	export function isThinkingMode(value: unknown): value is ThinkingMode {
	return typeof value === "string" && (MODES as readonly string[]).includes(value)
	}

	// Cycle order matches the slash command: show → hide → show.
	export function nextThinkingMode(current: ThinkingMode): ThinkingMode {
	const idx = MODES.indexOf(current)
	return MODES[(idx + 1) % MODES.length] ?? "show"
	}

	export function useThinkingMode() {
	const kv = useKV()
	// Capture pre-state before `kv.signal` seeds a default, so we can detect
	// first-time users with a legacy `thinking_visibility` boolean and migrate.
	// The KVProvider only renders children once kv.ready, so reads here are safe.
	const hadStored = kv.get("thinking_mode") !== undefined
	const legacy = kv.get("thinking_visibility")
	const [stored, setStored] = kv.signal<ThinkingMode>("thinking_mode", "hide")

	// The kv signal exposes its setter typed as `Setter<T>` which carries Solid's
	// overload set; passing an updater fn through a property access loses the
	// bivariance trick the existing `setX((prev) => ...)` callsites rely on.
	// Wrap it in a sane shape so consumers can just call `set(next)` or pass
	// an updater.
	const set = (next: ThinkingMode \| ((prev: ThinkingMode) => ThinkingMode)) => {
	if (typeof next === "function") setStored(next as Setter<ThinkingMode>)
	else setStored(() => next)
	}

	// Preserve previous experience for users who had explicitly toggled the
	// legacy `thinking_visibility` boolean. First-time users (no legacy key)
	// get the new "hide" default (collapsed thinking).
	if (!hadStored) {
	if (legacy === true) set("show")
	else if (legacy === false) set("hide")
	}

	if ((stored() as string) === "minimal") set("hide")

	const mode = createMemo<ThinkingMode>(() => {
	const value = stored()
	return isThinkingMode(value) ? value : "hide"
	})

	return {
	mode,
	set,
	}
	}