release 0.47.0 — 2026-09 pricing (Fable 5.1 cache reads, Sonnet 5, 1M windows, fast mode off the wire) + the docs the UI arc shipped without

[lroolle]

Release PR for 0.47.0. Two commits on top of main (#104 #105 #107 merged today).

Pricing follows the 2026-09-01 docs (src/pricing.ts, src/summarize.ts, src/cost.ts)

• Cache reads on Claude Fable 5.1 / Mythos 5.1 are 0.025x input ($0.25 per MTok; Fable 5 / Mythos 5 stay $1) - the embedded offline table now says so. models.dev (the live source) carried the change within the day, so live pages were already right.
• Sonnet 5's $2/$10 launch price is the standard price; the planned $3/$15 increase was cancelled.
• Long context on Claude 4.6+ is standard-rate across the full 1M window - what cctrace always assumed. The window's offline fallback follows the same rule: Opus 4.6+/5, Sonnet 4.6/5, Fable/Mythos = 1M; earlier tiers and every Haiku = 200k; an unversioned family = 0 (no %, never a wrong one).
• Two modifiers are read off the wire in ONE place (pairRates) so the per-pair cost and the cache-bump arithmetic agree: fast mode - the response's usage.speed is "fast" (Opus 5 / 4.8; a silently downgraded request says "standard" and is not fast) - doubles every rate with the cache multipliers on top; US-only inference (inference_geo: "us") is 1.1x on every class. The cost tooltip names the modifiers. No existing trace carries either field.
• Tests: pricing (5.1 cache read, Sonnet 5, pairRates, costTitle), cost (a fast-mode step bills 2x; a downgraded one does not), summarize (the two fields), context (the window fallback table). One grammar test that pinned Opus 4.6 at 200k now accepts the 1M window.

Release surfaces

• CHANGELOG folded: 0.47.0 = feat(replay): the trajectory bar — always on top, collapsible, synced with the turns; the loop-row diagram removed #104 + fix(view): /view/<run-id> budgets the page it renders and states the drop #105 + feat: cctrace insights — windowed usage aggregates + the cctrace-insights skill #107 + this.
• README (en + zh): the replay bullet still described the loop-row diagram removed in feat(replay): the trajectory bar — always on top, collapsible, synced with the turns; the loop-row diagram removed #104 and the pre-inspector Context deck; both rewritten (trajectory bar with turn blocks, the inspector), plus an insights bullet and the pricing note. docs/web-ui.md: the inspector, the bar, replay, the cost modifiers. The version badge's fresh-off-the-wire list refreshed.
• package.json 0.47.0.

Verified: bun test 900 pass / 0 fail, make build clean.

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