LINEアプリ開発のための Claude Code活用基盤の構築

by LINEヤフーTech (LY Corporation Tech)

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@giginet LINEΞϓϦ։ൃͷͨΊͷ Claude Code׆༻ج൫ͷߏங Development with Agents Meetup #1

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ࣗݾ঺հ • @giginet (X / GitHub: @giginet) • 2022/7 : چLINEೖࣾ • LINEΞϓϦ։ൃSBU ϞόΠϧσϕϩούʔΤΫεϖϦΤϯενʔϜ • LINE iOSΞϓϦͷϏϧυγεςϜ։ൃ΍ɺ։ൃऀମݧͷվળɺAIਪਐͳͲΛ ͍ͯ͠·͢

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ࠓ೔࿩͢͜ͱ • LINEΞϓϦ։ൃʹ͓͚ΔClaude Codeج൫ΛͲͷΑ͏ʹઃܭ͍ͯ͠Δ͔ • ΠςϨʔγϣϯߏஙͷॏཁੑ • ΠϯετϥΫγϣϯߏஙͷݪଇ • Skill/SubagentΛͲͷΑ͏ʹ࢖͍෼͚Δ͔ • ۩ମతͳSkill/Subagentͷ׆༻ྫ

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LINE iOS/AndroidΞϓϦ iOS Android ࣮૷ݴޠ Swift + Objective-C Kotlin + Java ίʔυߦ਺ ໿235ສߦ ໿268ສߦ Ϟδϡʔϧ਺ ໿650 ໿440 ϑΝΠϧ਺ ໿25000 ໿31800 2026/2/10ݱࡏ

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LINEΞϓϦݻ༗ͷ՝୊ • ΠςϨʔγϣϯ଎౓ʹ՝୊͕͋Δ • Ϗϧυ͕࣌ؒ௕͍ • ಠࣗͷ։ൃϧʔϧ΍ϓϩδΣΫτߏ଄ • Ϗϧυઃఆͷఆٛํ๏ɺϞδϡʔϧ͝ͱͷσΟϨΫτϦߏ଄ɺΫϦʔϯΞʔ ΩςΫνϟͳͲ • ։ൃऀ͕ଟ͘ɺྖҬʹΑͬͯඞཁͱ͢Δ஌͕ࣝҟͳΔ

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https://code.claude.com/docs/en/best-practices#give-claude-a-way-to-verify-its-work Best Practices for Claude Code

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LINE iOSΞϓϦͷ։ൃΠςϨʔγϣϯ

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Give Claude a way to verify its work • Claude Codeཱ͕ࣗతʹ݁ՌΛݕূͰ͖ΔΑ͏ʹ͢ΔͱɺύϑΥʔϚϯε͕ܶ తʹྑ͘ͳΔ • ϞόΠϧΞϓϦͷ৔߹΋࣮૷ͱϏϧυɾςετ࣮ߦͷϧʔϓ͕ߴ଎ʹճΔΑ ͏ʹ͠ͳ͍ͱͳΒͳ͍ • AI͕շదʹϑΟʔυόοΫϧʔϓΛճͤΔΑ͏ʹ஌ࣝ΍πʔϧΛ੔උ͢Δඞཁ ͕͋Δ

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LINE iOSΞϓϦ։ൃΛߴ଎Խ͢ΔClaude Codeج൫ͷઃܭࢥ૝ https://techblog.lycorp.co.jp/ja/20260119a

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Instructions • Instructionsͱ͍͏ޠኮΛఆٛ • Memory File (CLAUDE.md, Rules), Skills, SubagentͳͲͷΧελϜϓϩϯϓ τͷ૯শ

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Instructionsߏஙͷ3ݪଇ • ίϯςΩετ΢Οϯυ΢Λ࠷దԽ͢Δ • ΨʔυϨʔϧΛద੾ʹઃܭ͢Δ • ܧଓతͳվળΛՄೳʹ͢Δ

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ίϯςΩετ΢Οϯυ΢ͷ࠷దԽ • ίϯςΩετ΢Οϯυ΢͸ެڞͷࡒ࢈ 1. Memory fi les(CLAUDE.md)Λ࠷దԽ͢Δ • ৗʹϩʔυ͞ΕΔͨΊʹ࠷దԽͷ༨஍͕͋Δ • Skills΍RulesΛ࢖͑Δ৔໘Ͱ͸ͦͪΒΛ࢖͏ 2. SkillsͱSubagentΛద੾ʹ࢖͏

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Memory fi lesͷ࠷దԽ • CLAUDE.md(Memory fi les)͸খ͘͞อͭ • ࠷େ150ߦΛ໨҆ʹʢLINE iOS͸ݱࡏ80ߦ΄Ͳʣ • ੝ΓࠐΉ৘ใ͸࠷খݶʹߜΔ • ॻ͘ඞཁ͕ແ͍͜ͱ͸ॻ͔ͳ͍ • Ұൠతͳ஌ࣝ͸ॻ͔ͣɺϓϩδΣΫτݻ༗ͷ஌ࣝͷΈʹཹΊΔ

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LINE iOSΞϓϦͷ։ൃΠςϨʔγϣϯ Use running-tests skill Use generating-projects skill

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LINE iOSΞϓϦͰͷMemory Filesͷྫ w ΞϓϦશମͷϏϧυΛ཈ࢭɻʮϑϧϏϧυېࢭʯ w ෦෼Ϗϧυɺςετͷ෦෼࣮ߦͷͨΊʹಛఆͷ4LJMM΍4VCBHFOUΛ࢖͏Α͏ʹ ࢦࣔ w σΟϨΫτϦߏ଄ͷ୳ࡧ΍ɺϏϧυઃఆͷมߋɺΫϦʔϯΞʔΩςΫνϟΛѻ ͏ͨΊͷ4LJMMΛڭ͑Δ

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/context

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Agent SkillsΛߏங͢ΔࡍͷࠔΓ • SkillsͱSubagentͷͲͪΒʹInstructionΛॻ͚͹ྑ͍͔ʁ • context: forkͱ͔ɺskills: ͱ͔frontmatterͷࢦఆͷ۠ผ͕෇͔ͳ͍ • SkillΛͲΕ͙Β͍ͷཻ౓ʹ෼ׂ͢΂͖͔Θ͔Βͳ͍

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Claude CodeͷSubagentͱcontext: fork͸Կ͕ҧ͏ͷ͔ https://giginet.hateblo.jp/entry/2026/01/27/202636

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Reference ContentsͱTask Contents • Reference Contents • ݱࡏͷ࡞ۀʹ௥Ճ͢Δ஌ࣝΛ༩͑ΔSkill • ίʔσΟϯάن໿ɺυϝΠϯ஌ࣝɺελ ΠϧΨΠυͳͲ • Task Contents • ಛఆͷΞΫγϣϯʹରͯ͠ஈ֊తͳࢦࣔ Λ༩͑ΔSkill • Ϗϧυͷ࣮ߦɺίʔυੜ੒ɺPRΛ։͘ ͳͲ https://code.claude.com/docs/en/skills#types-of-skill-content

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࠷దͳSkillߏ଄ • Skill͸Reference Contentsʢ஌ࣝʣͱTask Contentsʢૢ࡞ʣͷཻ౓Ͱ෼ׂ Reference Contents Task Contents Skillͷ໾ׂ ৗʹಡΈࠐ·ΕΔઐ໳తͳ஌ࣝ ஈ֊తͳࢦࣔ SubagentԽͷख๏ Subagent಺Ͱskill: ࢦఆͰSkillΛϩʔυ context: forkͰSkill͔ΒSubagentΛىಈ ओͳ༻్ υϝΠϯ஌ࣝʹج͍ͮͨઃܭͷݕࠪͳͲ ϏϧυλεΫͷ࣮ߦͳͲ

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ྫɿΞʔΩςΫνϟͷߏ଄Λݕࠪ • ΞʔΩςΫνϟͷ஌ࣝΛReference ContentsͳSkillͱ࣮ͯ͠૷ • ΞʔΩςΫνϟͷߏ଄Λݕࠪ͢ΔSubagentΛ࡞ΓɺͦͷதͰSkillΛϩʔυɺ Subagent಺Ͱ͸ݕ߲ࠪ໨ͳͲͷৼΔ෣͍Λఆٛ --- name: tla-compliance-checker skills: tla-architecture-guide --- SubagentͷFrontmatter

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ྫɿϞδϡʔϧ͝ͱͷϏϧυ࣮ߦ • ϏϧυઃఆΛ࡞ΓɺϏϧυΛ࣮ߦ͢ΔTask ContentsͳSkillΛఆٛ • Ϗϧυઃఆ(Xcode build scheme)ͷੜ੒͸CLIπʔϧʹͯ҆͠શੑΛ୲อ • context: forkΛࢦఆͯ͠ɺαϒΤʔδΣϯτͰϏϧυΛ࣮ߦɻ݁ՌͷΈΛड͚ औΔ w Ϗϧυϩά͕ϝΠϯΤʔδΣϯτͷίϯςΩετ΢Οϯυ΢Λফඅ͠ͳ͍Α ͏ʹͳΓɺϏϧυ࣮ߦͷΈΛผͷ"HFOUͰ࣮ߦͰ͖ΔΑ͏ʹͳͬͨ

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·ͱΊ w *OTUSVDUJPOT͸ίϯςΩετ΢Οϯυ΢ʹ࠷దԽͨ͠ઃܭʹ͢Δ w .FNPSZ'JMFT͸࠷খݶʹೲΊΔ w 4LJMMT 3VMFTͳͲͰ୅ସͰ͖Δ͜ͱ͸$-"6%&NEʹॻ͔ͳ͍ w "HFOU4LJMMT͸$POUFOUTΛҙࣝͯ͠ద੾ͳઃܭΛߟ͑Δ w 3FGFSFODF$POUFOUTɺ5BTL$POUFOUTͷҧ͍Λҙࣝͯ͠ద੾ʹઃܭ͢Δ w ଞʹ΋ฉ͖͍ͨํ͸࠙਌ձͰʂʂʂ w ͦͷଞͷ4LJMMɺ"*ར༻࣮ଶͷଌఆɺ.BSLFUQMBDFͷ׆༻ͳͲ

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͝ਗ਼ௌ ͋Γ͕ͱ͏ ͍͟͝·ͨ͠