{"rewrite":{"id":"r_899ad038abb88069aec2b2a1","clusterId":"c_ce3a8a2bc53e4fb140f9cdf4","slug":"openai-builds-pando-backend-to-keep-git-working-at-monorepo-scale","model":"deepseek-v4-1-flash","headline":"OpenAI Builds Pando Backend to Keep Git Working at Monorepo Scale","summary":"OpenAI has developed Pando, an in-house Git backend for its giant code monorepo, GIGAZINE reports. Commit volume grew more than 14-fold from the first quarter of 2024 to the third quarter of 2026, and push failures and merge delays had pushed reliability below 90 percent by late 2025. Pando, written in Rust by one engineer over 10 weeks, went into production in April 2026, and OpenAI says merge success now sits near 100 percent.","whyItMatters":"OpenAI chose to fix Git from underneath rather than replace it, so the tool its engineers already used stayed in place while the scaling problem moved to a backend layer, and the knowledge it fed back to the Git community appears to be the only public part of the work.","webCardHtml":"\u003cp\u003ePando is a backend, not a replacement. OpenAI kept its existing Git workflows and changed the layer beneath them, coordinating update order per branch instead of for the whole repository and reusing Packfiles rather than generating one per client. The company says the system now delivers 57 terabytes per hour and close to 1 petabyte per day.\u003c/p\u003e\u003cp\u003eThe core design was handled by one engineer and implemented in Rust using Codex, reaching production in 10 weeks. Formal verification with Lean and TLA+ is run through GPT-6 Astra, with attack resistance testing by the security AI Daybreak. Pando is not open source, but OpenAI is sharing the bugs and knowledge with the Git development community.\u003c/p\u003e","blueskyPost":"Pando was built by one engineer in 10 weeks as an in-house patch for a monorepo whose merge success had fallen below 90 percent. OpenAI now owns a Git backend most companies would have waited on a vendor to ship.","twitterPost":"Pando started as one engineer's 10-week Rust project after OpenAI's push failures got bad enough to justify replacing its Git backend in-house.","threadsPost":"Pando is one engineer's 10-week Rust project, deployed to production in April 2026 after OpenAI's monorepo pushed merge success below 90 percent by late 2025. The backend now sits at roughly 100 percent, which makes the fix look less like a platform bet and more like an emergency repair.","newsletterBlurb":"OpenAI has built Pando, an in-house backend that lets Git handle its giant monorepo. Push failures and merge delays had cut reliability below 90 percent as commit volume grew more than 14-fold from early 2024 to the third quarter of 2026. The system has run in production since April 2026 and is closed source, though OpenAI is passing its findings to the Git development community.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20261104-openai-git-pando/\",\"title\":\"OpenAI develops \\\"Pando\\\" backend for running ultra-large repositories in Git\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":5535,"outputTokens":774,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1793769607,"createdAt":"2026-11-04T05:15:56.000Z","publishedAt":"2026-11-04T05:18:55.000Z","updatedAt":"2026-11-04T05:18:55.000Z"},"cluster":{"id":"c_ce3a8a2bc53e4fb140f9cdf4","canonicalTitle":"OpenAIがGitで超大規模リポジトリを運用するためのバックエンド「Pando」を開発","representativeArticleId":"a_5f814dd8f6b788c11ffdaaed","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Pando\"],\"studios\":[],\"people\":[],\"type\":\"announcement\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-11-04T04:31:00.000Z","lastSeenAt":"2026-11-04T04:31:00.000Z","updatedAt":"2026-11-04T05:18:53.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20261104-openai-git-pando/","title":"OpenAIがGitで超大規模リポジトリを運用するためのバックエンド「Pando」を開発"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Pando"],"studios":[],"people":[],"type":"announcement","domain":"other","is_roundup":false},"keyFacts":["OpenAI developed Pando as a backend for Git to support its large-scale monorepo.","OpenAI's commit volume grew more than 14-fold from the first quarter of 2024 to the third quarter of 2026.","Pando entered production operation in April 2026 and took 10 weeks from start of development, written in Rust using Codex.","OpenAI has not open-sourced Pando but shares knowledge and bugs with the Git development community."],"pageLinks":{"healthSlugs":["pando"],"storySlugs":[],"entities":[{"slug":"pando","supported":0,"disputed":0,"contradicted":0,"unverified":1,"overall":"unverified","story_count":1,"has_dossier":true}],"stories":[],"entitiesOk":true,"storiesOk":true}}