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今からでも間に合う!速習Devin入門とその活用方法

 今からでも間に合う!速習Devin入門とその活用方法

2025/12/10(水) に開催された『Devin 1st Anniversary Meetup Japan』( https://aid.connpass.com/event/375543/ ) の資料です。

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Izumu KUSUNOKI

December 10, 2025
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  1. PROBLEM "*։ൃπʔϧͷ ΧΦε͔Β ൈ͚ग़͢ ࣍ʑͱొ৔͢Δ"*πʔϧɻ બ୒ࢶͷଟ͕͞ɺ৽ͨͳʮ໎͍ʯΛੜΜͰ͍·͢ɻ Github Copilot Cursor Windsurf

    Devin πʔϧͷരൃతͳ૿Ճ (JU)VC$PQJMPU͔Β࢝·Γɺ$VSTPSɺ8JOETVSGɺͦͯ͠%FWJOɻ ࣍ʑͱ৽͍͠πʔϧ͕ొ৔͠ଓ͚͍ͯ·͢ɻ ݱ৔ͷࠞཚ ʮ݁ہͲΕ͕ԿͰɺͲ͏࢖͍෼͚Δͷ͔ʁʯ ΤϯδχΞͷؒͰڞ௨ೝ͕ࣝ࣋ͯͣɺࠞཚ͕ੜ͍ͯ͡·͢ɻ ຊηογϣϯͷΰʔϧ このカオスを整理する「地図」を提供します
  2. CLASSIFICATION "*ۦಈ։ൃπʔϧͷ෼ྨ *%&౷߹ܕ ໾ׂɿΞγελϯτ "TTJTUBOU ΤσΟλ಺Ͱ ϦΞϧλΠϜʹ։ൃऀΛࢧԉ ίʔυิ׬ɺνϟοτܗࣜͰͷ࣭໰Ԡ౴ͳͲɺ ͋͘·Ͱਓ͕ؒओಋݖΛ࣋ͭɻ REPRESENTATIVE

    TOOLS Cursor Windsurf GitHub Copilot ΤʔδΣϯτܕ ໾ׂɿಉ྅ $PMMFBHVF ಠཱ؀ڥͰ ࣗ཯తʹλεΫΛ਱ߦ ܭըཱҊ͔Β࣮૷ɺΤϥʔमਖ਼·Ͱɺ ਓؒͷհೖͳ͠ʹ׬݁ͤ͞ΔೳྗΛ࣋ͭɻ %&7*/4104*5*0/ ੈքॳͷ "*ιϑτ΢ΣΞΤϯδχΞ REPRESENTATIVE TOOLS Devin Claude Code Desktop
  3. CORE CONCEPTS ࣗ཯ܕ"*ιϑτ΢ΣΞΤϯδχΞ %FWJOΛߏ੒͢Δͭͷப 01 ࣗ཯ੑ "VUPOPNZ ਓؒͷհೖͳ͠ʹࣗΒܭըΛཱ࣮ͯߦ͠ ɺΤϥʔ͕͋Ε͹ࣗݾमਖ਼Λߦ͏ೳྗɻ Plan

    & Execute 02 ִ཭ੑ *TPMBUJPO ҆શͳαϯυϘοΫε؀ڥͰ࡞ۀ͠ɺϩ ʔΧϧ؀ڥΛԚͣ͞ʹ։ൃΛ׬݁ͤ͞Δ ɻ Safe Sandbox 03 ฒྻੑ $PODVSSFODZ ෳ਺ͷλεΫΛಉ࣌ʹฒྻ࣮ߦ͠ɺ։ൃ ଎౓Λܶతʹ޲্ͤ͞ΔεέʔϥϏϦς Οɻ Multi-tasking
  4. ENVIRONMENT & EXTENSIBILITY %FWJOͷ࡞ۀ৔ͱ֦ுੑ αϯυϘοΫε؀ڥ SECURE WORKSPACE %FWJO͸҆શͳִ཭؀ڥͰ࡞ۀ͠·͢ɻ ϩʔΧϧ؀ڥΛԚ͢͜ͱͳ͘ɺλεΫ͝ͱʹಠཱͨ͠؀ڥཱ͕ ্͕ͪΓ·͢ɻ

    ׬උ͞Εͨπʔϧ܈ Shell Devin IDE Browser Isolated Secure Reproducible .$1 MODEL CONTEXT PROTOCOL ֎෦πʔϧͱ҆શʹ࿈ܞ͢ΔͨΊͷΦʔϓϯϓϩτίϧɻ %FWJOͷೳྗΛ֎෦Ϧιʔε΁ͱ֦ு͠·͢ɻ γʔϜϨεͳ࿈ܞઌ PostgreSQL GitHub Slack Jira Datadog 4UBOEBSEJ[FE1SPUPDPM 4FDVSF$POOFDUJPO 6OMJNJUFE1PTTJCJMJUZ
  5. MINDSET ৺ߏ͑ɿ%FWJOΛʮ৽ਓΤϯδχΞʯͱͯ͠ѻ͏ ຐ๏ͷ৛Ͱ͸ͳ͘ɺڞʹ੒௕͢Δύʔτφʔͱͯ͠઀͢Δ ظ଴ͯ͠͸͍͚ͳ͍͜ͱ COMMON PITFALLS ᐆດͳࢦࣔͰ׬ᘳͳ੒Ռ෺ ʮ͍͍ײ͡ʹ͓ئ͍ʯ͸௨͡·ͤΜɻίϯςΩετෆ଍͸ࣦഊ ͷݩͰ͢ɻ ߴ౓Ͱෳࡶͳઃܭͷؙ౤͛

    ΞʔΩςΫνϟશମͷઃܭͳͲɺந৅౓ͷߴ͗͢ΔλεΫ͸· ͩۤखͰ͢ɻ ʮۭؾΛಡΉʯ͜ͱ ҉໧ͷྃղ΍νʔϜಠಛͷ׳श͸ɺ໌จԽ͠ͳ͍ݶΓཧղͰ͖ ·ͤΜɻ ஸೡͳΦϯϘʔσΟϯάʢυΩϡϝϯτ੔උɾϧʔϧڞ༗ʣ͕%FWJO׆༂ͷΧΪ ظ଴Ͱ͖Δ͜ͱ DEVIN'S SUPERPOWERS ໌֬ͳࢦࣔʹجͮ͘ߴ଎ͳ࣮૷ ࢓༷͕໌֬Ͱ͋Ε͹ɺਓؒΛ྇կ͢Δ଎౓ͰίʔυΛੜ੒ɾमਖ਼ ͠·͢ɻ ఆܕ࡞ۀͷࣗಈԽ ϥΠϒϥϦߋ৽΍ςετ࡞੒ͳͲɺ൓෮తͳλεΫΛർΕ஌Βͣ Ͱ࣮ߦ͠·͢ɻ ࣗݾֶशʹΑΔ੒௕ ϑΟʔυόοΫΛ༩͑Ε͹ɺमਖ਼ύλʔϯΛֶश͠ɺ࣍ճ͔Βਫ਼ ౓͕޲্͠·͢ɻ
  6. PRACTICE 01 ࣮ફᶃɿྑ͍ࢦࣔ WTѱ͍ࢦࣔ ࢦࣔͷ۩ମੑ͕੒ޭΛࠨӈ͢Δ BAD PROMPT ユーザー統計エンドポイントを追加して ͳͥμϝͳͷ͔ʁ ཁ͕݅ᐆດ͗͢Δ

    ࢓༷ʢύεɺϨεϙϯεʣ͕ෆ໌ ׬ྃ৚݅ʢςετʣ͕ͳ͍ GOOD PROMPT ͕͜͜ྑ͍ʂ Create /users/stats endpoint Follow the pattern in /orders/stats Must pass StatsController.test.js // Implementation should include proper error handling > Goal: Context: Validation: Output:
  7. ࣮ફᶄ"*΁ͷࢦࣔॻ "(&/54NE νʔϜͷʮ͓࡞๏ʯΛ%FWJOʹ఻͑Δ README.md 5BSHFU)VNBOT ։ൃऀ޲͚ ϓϩδΣΫτͷ֓ཁɾഎܠ ओཁػೳͷઆ໌ εΫϦʔϯγϣοτ΍σϞ ਓؒ޲͚ͷηοτΞοϓखॱ

    PURPOSE ਓ͕ؒϓϩδΣΫτΛཧղ͢ΔͨΊͷυΩϡϝϯτ AGENTS.md 5BSHFU"* %FWJO޲͚ # Setup Command $ pnpm install # Code Style Use ESLint & Prettier configs # Testing $ pnpm test PURPOSE "*͕໎Θͣ࡞ۀ͢ΔͨΊͷʮݫີͳࢦࣔॻʯ PRACTICE 02 VS
  8. ࣮ફᶅɿνʔϜͷ҉໧஌Λܗࣜ஌ʹ Š ,OPXMFEHF ηογϣϯΛԣஅֶͯ͠श͠ɺνʔϜઐ༻ͷΤʔδΣϯτ΁ҭͯΔ IMPACT ࢖͑͹࢖͏΄ͲɺνʔϜͷ޷ΈΛཧղͨ͠ʮѨჴͷݺٵʯ͕Ͱ͖Δಉ྅ʹҭͪ·͢ɻ ηογϣϯͰͷ ΍ΓऔΓ %FWJOͱͷ࡞ۀதʹɺνʔϜ ಛ༗ͷϧʔϧ΍޷ΈΛࢦࣔ

    ͢Δ৔໘͕ൃੜɻ ϑΟʔυόοΫ ʮ͜ͷϓϩδΣΫτͰ͸ɺς ετϑΝΠϧ͸ `__tests__` ʹஔ͍ͯʯͱ मਖ਼ґཔɻ ,OPXMFEHFԽ ࢦࣔΛʮ,OPXMFEHFʯͱ͠ ͯঝೝɾอଘɻ҉໧஌͕ܗࣜ ஌ͱͯ͠ه࿥͞ΕΔɻ  ࣍ͷηογϣϯͰ ׆༻ ৽͍͠ηογϣϯ։࢝࣌ɺ ,OPXMFEHFΛࣗಈࢀরɻಉ ͡ࢦఠΛ͢Δඞཁ͕ͳ͘ͳ Δɻ    PRACTICE 03
  9. ࣮຿ᶆ4FDSFUT؅ཧ ͭͷείʔϓ ACCESS SCOPE ೝূ৘ใ͸ར༻ൣғʹԠͯ͡ద੾ͳείʔϓͰ؅ཧɻ (MPCBM 0SHBOJ[BUJPO ૊৫શମͰར༻ՄೳɻҰ౓ઃఆ͢Ε͹Ӭଓతʹ࢖༻Մೳɻ 3FQPTJUPSZ 1SPKFDU

    ಛఆͷϦϙδτϦ಺ͰͷΈར༻ՄೳɻϓϩδΣΫτݻ༗ͷΩʔʹ ࠷దɻ 4FTTJPO 5FNQPSBSZ ݱࡏͷηογϣϯͷΈ༗ޮɻҰ࣌తͳೝূ΍࣮ݧతͳར༻ʹɻ छྨͱϕετϓϥΫςΟε SECURE MANAGEMENT औΓѻ͑Δ4FDSFUͷछྨ 3BX4FDSFU "1*Ωʔɺ44),FZɺΞΫηετʔΫϯͳͲ 4JUF$PPLJFT ϩάΠϯঢ়ଶͷอ࣋ɺηογϣϯ৘ใͷڞ༗ 5051 ཁૉೝূʢ'"ʣίʔυͷੜ੒ʹରԠ #FTU1SBDUJDF %FWJOઐ༻ΞΧ΢ϯτΛ࡞੒͢Δ [email protected] ݸਓͷೝূ৘ใΛڞ༗͢ΔͷͰ͸ͳ͘ɺ%FWJOΛνʔϜͷҰһͱͯ͠ѻ͍ɺ ઐ༻ͷΞΧ΢ϯτΛ෇༩͢Δ͜ͱ͕ਪ঑͞Ε·͢ɻ PRACTICE 04
  10. ࣮ફᶇɿఆܕ࡞ۀͷࣗಈԽ Š 1MBZCPPL ܁Γฦ͠࡞ۀΛʮखॱॻʯςϯϓϨʔτԽͯ͠ޮ཰Խ͢Δ 64&$"4& όάใࠂͷτϦΞʔδ *TTVF͕࡞੒͞ΕͨΒࣗಈͰௐࠪΛ։࢝͠ɺ࠶ݱ ੑͷ֬ೝ͔Βϥϕϧ෇͚·ͰΛ࣮ߦɻ 1 ࠶ݱखॱͷݕূɾ֬ೝ

    2 ద੾ͳϥϕϧͷ෇༩ 3 ༏ઌ౓ͷఏҊɾઃఆ 64&$"4& ϥΠϒϥϦఆظߋ৽ ґଘؔ܎ͷΞοϓσʔτΛݕ஌͠ɺ҆શʹόʔδϣ ϯΞοϓΛߦ͏ϓϩηεΛࣗಈԽɻ 1 ӨڹൣғνΣοΫ 2 มߋཤྺͷཁ໿ 3 ςετ࣮ߦͱ13࡞੒ 64&$"4& "1*਽ܗ࡞੒ ৽͍͠ΤϯυϙΠϯτ͕ඞཁʹͳͬͨࡍɺϓϩδΣ Ϋτن໿ʹԊͬͨϑΝΠϧΛҰׅੜ੒ɻ 1 ࢓༷ςϯϓϨಡࠐ 2 ࣮૷ίʔυੜ੒ 3 ςετ਽ܗͷੜ੒ PRACTICE 05
  11. COLLABORATION 01 ίʔυϕʔεͷ ࣗಈυΩϡϝϯτԽ %FFQ8JLJ ৽͍͠ϝϯόʔͷΦϯϘʔσΟϯάՃ଎΍ɺ ෳࡶͳίʔυϕʔεͷཧղΛܶతʹޮ཰Խ͠·͢ɻ .devin/wiki.json Documentation Indexing

    ϦϙδτϦͷࣗಈΠϯσοΫεԽ ϦϙδτϦશମΛղੳ͠ɺΞʔΩςΫνϟਤɺιʔε΁ͷϦϯΫɺ ίʔυϕʔεͷཁ໿ΛؚΉ8JLJΛࣗಈੜ੒͠·͢ɻ "TL%FWJOͱͷڧྗͳ࿈ܞ %FFQ8JLJͷ৘ใΛ׆༻͢Δ͜ͱͰɺίʔυʹؔ͢Δ࣭໰ʹରͯ͠ɺ ίϯςΩετΛ౿·͑ͨߴਫ਼౓ͳճ౴Λ࣮ݱ͠·͢ɻ ॊೈͳΧελϚΠζ੍ޚ EFWJOXJLJKTPOͰ8JLJੜ੒Λ੍ޚՄೳɻ ྫSFQP@OPUFT QBHFT ͷઃఆͰඞཁͳ৘ใ͚ͩΛؚΊΔ͜ͱ͕Ͱ͖·͢ɻ
  12. COLLABORATION 2 ର࿩ʹΑΔܭըमਖ਼ͱ໰୊ղܾ *OUFSBDUJWF1MBOOJOH PROACTIVE GUIDANCE %FWJO͸࡞ۀ։࢝લʹৄࡉͳ࣮ߦܭըΛఏࣔ͠·͢ɻ ਓ͕ؒ͜ͷܭըΛ֬ೝɾमਖ਼͢Δ͜ͱͰɺ࡞ۀͷํ޲ੑΛૣظ ʹίϯτϩʔϧͰ͖·͢ɻ ख໭ΓΛະવʹ๷͙

    1MBO3FWJFX $PVSTF$PSSFDUJPO &BSMZ'FFECBDL Review Edit Approve "TL%FWJO ON-DEMAND ASSISTANCE ࡞ۀதʹٙ໰͕ੜͨ͡ΓɺΤϥʔ͕ൃੜͨ͠৔߹͸ɺ͍ͭͰ΋ %FWJOʹ࣭໰Ͱ͖·͢ɻ %FFQ8JLJͱ࿈ܞ͠ɺจ຺Λཧղͨ͠ճ౴Λఏڙ͠·͢ɻ %FFQ8JLJͱͷڧྗͳ࿈ܞ $POUFYU"XBSF $PEF&YQMBOBUJPO &SSPS3FTPMVUJPO 2VFSZ $POUFYU"OBMZTJT 4PMVUJPO
  13. COLLABORATION & WORKFLOW ϦΞϧλΠϜڠಇͱ࣮ફϫʔΫϑϩʔ %FWJO*%& REAL-TIME COLLABORATION %FWJOͷ࡞ۀ؀ڥΛϦΞϧλΠϜͰ೷͖ɺඞཁʹԠ ͯ͡ਓ͕ؒ௚઀ίʔυΛฤूͯ͠հೖͰ͖·͢ɻ ࡞ۀͷಁ໌ੑ

    ίϚϯυ࣮ߦ΍ϑΝΠϧฤूΛϦΞϧλΠϜͰ ؂ࢹ ௚઀հೖ ෳࡶͳमਖ਼΍ํ਑స׵࣌ʹ௚઀ίʔυΛमਖ਼Մ ೳ ࣮ફϫʔΫϑϩʔ TEAM INTEGRATION PATTERNS 4MBDL࿈ܞͰଈ࣌ґཔ όάใࠂεϨουͰ%FWJOΛϝϯγϣϯ͢Δ͚ͩͰɺίϯςΩετΛಡΈ औΓमਖ਼Λ։࢝ɻ *%&ͰλεΫҕৡ ϦϑΝΫλϦϯά΍ςετ࡞੒ͳͲɺίϯςΩετεΠονͷίετ͕ߴ ͍࡞ۀΛ೚ͤΔɻ ேձҰׅىಈϫʔΫϑϩʔ ࡉ͔͍λεΫΛேҰ൪Ͱෳ਺ฒྻ࣮ߦɻਓ͕ؒଞͷ࡞ۀΛ͍ͯ͠Δؒʹ׬ ྃͤ͞ɺனʹϨϏϡʔɻ
  14. GAME CHANGER %BUB"OBMZTU "HFOU %"/" σʔλ෼ੳʹಛԽͨ͠ΤʔδΣϯτ %FWJOͷೳྗΛσʔλྖҬʹ֦ுɻ ෳࡶͳσʔλϕʔεߏ଄Λཧղ͠ɺ෼ੳλεΫΛઐ໳ʹ୲౰͠·͢ɻ ࣗવݴޠͰґཔ ˠଈ࣌݁Ռ

    ʮઌ݄ͷച্ਪҠΛݟͤͯʯͱ࿩͔͚͠Δ͚ͩɻ ΫΤϦ࡞੒͔Βάϥϑඳը·Ͱɺ਺෼Ͱ׬݁͠·͢ɻ ։ൃͱσʔλͷؔΘΓํ͕Ұม͢Δ͔ σʔλநग़଴ͪͷ࣌ؒΛθϩʹɻ ։ൃऀ͕ʮσʔλυϦϒϯͳҙࢥܾఆʯΛࣗ཯తʹߦ͑ΔΑ͏ʹͳΓ ·͢ɻ
  15. %"/"%&.0 %"/"׆༻Πϝʔδ ࣗવݴޠͰ σʔλ ෼ੳΛґཔ ʮ͜Εूܭͯ͠ʯͱνϟοτͰཔΉ͚ͩɻ 42-΋1ZUIPO΋ɺ%"/"͕શͯॻ͍࣮ͯߦ͠·͢ɻ Natural Language Auto

    SQL Visualization ۩ମతͳࢦࣔͷྫ ʮઌ݄ͷ՝ۚϢʔβʔͷ-57Λɺొ࿥ܦ࿏ผʹूܭͯ͠άϥϑԽͯ͠ʯ ࣗಈ࣮ߦͱ݁Ռ %"/"͕%#ʹΫΤϦΛ࣮ߦ͠ɺ෼ੳ݁ՌΛଈ࠲ʹάϥϑԽͯ͠ฦ͠·͢ɻ ѹ౗తͳϝϦοτ 42-Λॻ͘ඞཁ͸Ұ੾͋Γ·ͤΜ
  16. TAKEAWAYS ຊ೔ͷ·ͱΊ %FWJOΛ࢖͍͜ͳͨ͢Ίͷͭͷݤ    ໌֬ͳࢦࣔ ظ଴஋ௐ੔ KEY 01

    : MINDSET ʮ৽ਓΤϯδχΞʯ ͱͯ͠ѻ͏ ຐ๏ͷ৛Ͱ͸͋Γ·ͤΜɻஸೡͳΦϯϘ ʔσΟϯάͱ໌֬ͳࢦࣔग़͕͠ɺ൴ͷೳ ྗΛ࠷େݶʹҾ͖ग़͠·͢ɻ "(&/54NE ,OPXMFEHF 4FDSFUT 1MBZCPPL KEY 02 : MECHANISM ࢓૊ΈͰ ҭͯΔ ݸผͷࢦ͚ࣔͩͰͳ͘ɺυΩϡϝϯτ΍ ϧʔϧϒοΫΛ੔උ͢Δ͜ͱͰɺνʔϜ ઐ༻ͷΤʔδΣϯτ΁ਐԽ͠·͢ɻ %FFQ8JLJ %"/" KEY 03 : LEVERAGE ߴ౓ͳػೳͰ Ճ଎͢Δ ίʔυཧղ΍σʔλ෼ੳͳͲɺઐ໳తͳ λεΫΛ೚ͤΔ͜ͱͰɺਓؒ͸ΑΓ૑଄ తͳ՝୊ղܾʹूதͰ͖·͢ɻ