Lǐ Jiè 李誡 (?–1110), courtesy name Míngzhòng 明仲, was a senior Northern-Sòng building official and the principal compiler of the KR2m0056 Yíngzào fǎshì 營造法式 (1100; printed 1103), the canonical Sòng state architectural manual. His career was almost entirely within the Imperial Workshops (Jiāngzuò jiàn 將作監): rising to Tōngzhí láng 通直郎 and Acting Junior Director (Jiāngzuò shǎojiàn 將作少監) under Sòng Huīzōng, he supervised the construction of imperial-clan secondary residences in the eastern capital Biànliáng 汴梁 (modern Kāifēng) and of the various banner-troop barracks. Sòng Zhézōng commissioned him in Shàoshèng 4 (1097) to revise the Yíngzào fǎshì; he submitted the new redaction in Yuánfú 3 (1100), and Chóngníng 2 (1103) saw its imperial promulgation. Lù Yǒurén’s Yánběi zázhì 硯北雜誌 records six other works by him — a Xù Shānhǎi jīng in 10 juǎn, a Gǔzhuàn shuōwén in 10 juǎn, a Xù tóngxìngmíng lù in 2 juǎn, a Pípá lù in 3 juǎn, a Mǎjīng in 3 juǎn, and a Liùbó jīng in 3 juǎn — none of which survive. CBDB id 420 records death 1110, no birth year, index year 1047. The catalog meta birth-year 1035 (also given in some Chinese-architecture handbooks) is not supported by CBDB; the conservative Western reference (Wilkinson) gives “?–1110”.
The Sìkù tíyào defends the form 誡 of his given name (preserved on the Fànshì Tiānyī gé photo-copy of the Sòng edition and in the Sòngshǐ Yìwén zhì) against the variant 誠 in Lù Yǒurén. Note that there is also an unrelated late-Táng / early-Sòng 李誡 in CBDB (189196, d. 828) and a third (213960) without dates — neither is the architect.