Life-Arc 流年 (Cross-Tradition Year-by-Year) (流年人生轴（跨系統）)

A CHART-AWARE, YEAR-BY-YEAR reading for a whole life — click any single year of the life arc (birth → ~90, past years as much as future) and read what it holds. BaZi 流年 is the spine: per year the annual Gānzhī with its Ten God vs the day master, Twelve Stage, elements, animal and 纳音; the annual branch/stem read against the FOUR natal pillars — 六冲/六合/六害/六破/刑/自刑 (branch) and 天干五合 (stem), plus any 三合/半合/三会 the annual branch COMPLETES with the natal branches, each tagged with the natal palace it touches (year=ancestry, month=parents/career, day=spouse/self, hour=children) — the signal that makes a year eventful rather than flat; and the 神煞 the annual branch activates against the natal anchors (桃花/驿马/天乙贵人/羊刃/红鸾/天喜 …). Five life-domain leans (career/wealth/relationship/health/study, a 0–100 lean + a note each), an overall 0–100 favorability SCORE + rating band for at-a-glance colouring, and a deterministic 2–3 sentence NARRATIVE per year in the requested language (zh/en). A crossLens rides along — the SAME year seen through five OTHER annual traditions: the Hellenistic profection Lord-of-Year, the Vimśōttarī daśā lords, the Tajika Varshaphala year-lord, the Western Solar Return, and the Zǐwēi 太歲 palace — shown side by side as lenses, never reconciled. Pull one decade (chapter) at a time via fromYear/toYear or fromAge/toAge; the span is capped at 15 years/call. The 0–100 leans and score are a DISCLOSED heuristic, not a measured probability; symbolic reflection, not a validated predictor. Billing: 15 TIAN per call with the LLM arc, 8 TIAN structured-only (interpretation:false). Deterministic core; the per-year narratives return even when the LLM is skipped or down. OMITTED INPUTS DISCLOSED (same contract as bazi.chart): no gender → genderAssumption (the Da Yun direction assumption), no birth time → hourAssumption naming the hour-palace interactions as assumptions and the measured 晚子時 day-roll.

Cost: 15 TIAN Points per call. tRPC procedure tian.annual.