Provenance Record

Analysis-category (~1,400 words, within 800–2000). Overview / What Was Merged / How It Was Built / The Zig Backstory / The Unsafe-Block Problem / What's Open structure. Genuinely strong analytical contribution: ties the Zig-no-AI policy frame to Bun's exit move, contrasts the 13,000-unsafe-block density against uv's 73, and surfaces both Sumner's optimism ('OSS to go the opposite direction') and Cro's contributor-poker critique in their own words. Neutral framing.

{"source-0":{"url":"https://github.com/oven-sh/bun/pull/30412","snapshot":"source-0.html.gz","status":"Primary publication (Rule 9): the rewrite PR itself. Title 'Rewrite Bun in Rust' and Sumner's 'pre-existing test suite' / '3 MB - 8 MB' description verified in plain text. PR counts (1,009,257 / 4,024 / 6,755 / 2,188) verified via GitHub API: additions=1009257, deletions=4024, commits=6755, changed_files=2188, merged_at=2026-05-14T08:09:34Z, merged_by=Jarred-Sumner."},"source-1":{"url":"https://github.com/oven-sh/bun/pull/30680","snapshot":"source-1.html.gz","status":"Primary publication (Rule 9): the 'ai slop' cleanup PR. Title 'ai slop' verified in plain text. Counts (22 / 639,678 / 1,236) verified via GitHub API: additions=22, deletions=639678, changed_files=1236, state=closed."},"source-2":{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.14","snapshot":"source-2.html.gz","status":"Primary publication (Rule 9): Bun v1.3.14 release. Verifies the 'last Zig-built version' framing."},"source-3":{"url":"https://www.theregister.com/devops/2026/05/14/anthropics-bun-rust-rewrite-merged-at-speed-of-ai/5240381","snapshot":"source-3.html.gz","status":"The Register. Verifies 'shrinks the binary size between 3 and 8 MB', 'last version in Zig' Sumner quote, 'this is already the status quo; we haven't been typing code ourselves for many months now' Sumner quote, and GitHub auto-flagging anecdote."},"source-4":{"url":"https://www.devclass.com/software/2026/05/11/anthrophics-bun-team-trials-port-from-zig-to-rust/5237835","snapshot":"source-4.html.gz","status":"DevClass. Verifies 'we haven't committed to rewriting' Sumner quote verbatim, four-times debug-compilation framing, OSS opposite-direction quote, Anthropic-acquired-and-uses-it-for-Claude-Code framing. NOTE: article attributes 'cannot be merged upstream' to DevClass in quote marks; the source actually says 'cannot be upstreamed to Zig'. Paraphrase in quote marks — filed correction."},"source-5":{"url":"https://kristoff.it/blog/contributor-poker-and-ai/","snapshot":"source-5.html.gz","status":"Primary publication (Rule 9): Loris Cro blog post. Verifies all Cro quotes verbatim — 'contributor poker', 'play the person, not the cards', 'mostly negative', 'insane 10 thousand line long first time PRs'."},"source-6":{"url":"https://byteiota.com/bun-rust-rewrite-merged-the-13000-unsafe-block-problem/","snapshot":"source-6.html.gz","status":"byteiota. Verifies 13,000+ unsafe blocks, 681,000 Rust LOC, 99.8% test pass on Linux x86-64 glibc, 16,000 compiler errors at start, 73-unsafe-blocks / 350,000 LOC uv comparison."},"source-7":{"url":"https://simonwillison.net/2026/Apr/30/zig-anti-ai/","snapshot":"source-7.html.gz","status":"Simon Willison. Verifies Zig 'No LLMs for issues. No LLMs for pull requests. No LLMs for comments on the bug tracker.' summary verbatim."},"source-8":{"url":"https://en.wikipedia.org/wiki/Bun_%28software%29","snapshot":"source-8.html.gz","status":"Wikipedia. Verifies JavaScriptCore embedding and Anthropic December 2025 acquisition framing."},"source-9":{"url":"https://lilting.ch/en/articles/bun-zig-rust-ai-port","snapshot":"source-9.html.gz","status":"lilting.ch. Verifies `claude/phase-a-port`, `claude/bench-until-green`, `claude/code-dedup` branch names verbatim."}}

Strong Analysis-category coverage with exemplary Rule 9 discipline (PR #30412, PR #30680, Bun v1.3.14 release page, Stenberg blog, Cro blog all cited as primary publications). The PR-level facts (1,009,257 / 4,024 / 6,755 / 2,188 for #30412; 22 / 639,678 / 1,236 for #30680; 'Rewrite Bun in Rust' / 'ai slop' titles; Jarred-Sumner as author + merger; 2026-05-14T08:09:34Z merge timestamp) are not in the GitHub HTML snapshots (they render via JS) but verified directly via the GitHub API. All quotes traced verbatim: Sumner 'pre-existing test suite' / '3 MB - 8 MB' / 'last version in Zig' / 'this is already the status quo' (PR + Register); Sumner DevClass 'haven't committed to rewriting' + 'no human contribution allowed'; Cro 'contributor poker' / 'play the person, not the cards' / 'mostly negative' / 'insane 10 thousand line long first time PRs' (kristoff.it); Willison 'No LLMs for issues. No LLMs for pull requests. No LLMs for comments on the bug tracker.'; byteiota's 13,000 unsafe blocks + 681,000 Rust LOC + 99.8% test pass + 16,000 compiler errors + 73 unsafe / 350,000 LOC uv comparison; lilting.ch branch names `claude/phase-a-port`, `claude/bench-until-green`, `claude/code-dedup`. One minor paraphrase-in-quote-marks issue: 'cannot be merged upstream' inside quote marks attributed to DevClass; DevClass actually says 'cannot be upstreamed to Zig.' Filed correction.