feat: stamp scaffold provenance as a Cella-Base trailer, drop .cella/base#12
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…base Record the upstream commit a scaffold was created from as a `Cella-Base: <sha>` trailer on the initial commit instead of writing a committed .cella/base file. The trailer rides in git history, so it travels with push/clone, needs no worktree metadata, and is read by the sync CLI (cella-cli) to bootstrap the first merge-base; when it is absent or stale, cella-cli falls back to tree-similarity inference. The .cella/base file was never read by the current sync CLI, so this also removes dead scaffolding. Co-Authored-By: Claude Fable 5 <[email protected]>
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Summary
Record the upstream commit a scaffold was created from as a
Cella-Base: <sha>trailer on the initial commit, and drop the committed.cella/basefile — which the current sync CLI never read.The trailer rides in git history, so it travels with push/clone (a teammate cloning the fork before its first sync still bootstraps), needs no worktree metadata, and puts provenance where it belongs:
git log. cella-cli reads it from the root commit to bootstrap the first merge-base, falling back to tree-similarity inference when it is absent or stale (see companion PR cellajs/cella-cli#4).downloadGithubTemplatereturns the cloned HEAD SHA again;create()stamps it as the trailer (Initial commit\n\nCella-Base: <sha>)Initial commit, as before — cella-cli's inference now covers them (they previously could not sync at all)src/utils/write-scaffold-base.tsdeleted; no.cella/directory is writtenTests
github:cellajs/cellascaffold) asserts the trailer is present on the root commit and no.cella/directory exists; 33 tests pass, tsc/biome clean.🤖 Generated with Claude Code