Fastly chunked-config GC: reclaim orphaned chunk entries on re-push (last-writer-wins) - #314

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spec/fastly-chunk-gc

Commits on Jul 8, 2026

Spec: Fastly chunked-config GC to reclaim orphaned chunk entries on re-push
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Spec review v2: fix file map (cli.rs, not the unmerged split), validate+scope prior_chunk_keys, offline cloud dry-run, local root inference, warning semantics, invert stale no-GC test
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Spec review v3: thread logical roots (--key is free-form, infix inference unsound); Value-first prior_chunk_keys so invalid pointer-kind warns; drop 'atomic' overclaim; define local dry-run degrade…
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Add Fastly chunk-GC implementation plan, reconciled with spec v3
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Self-review fixes (spec+plan): expand new_keys in local dry-run so identical re-push counts 0 (was over-counting); enumerate all 10 writer call sites + roots args; forbid --all on delete; reword fa…
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Review v4 (spec+plan): close cloud GC concurrency hole via post-commit root read-back guard (invariant 5); build keep-sets from per-root expand_root instead of prefix-scanning flattened entries; ma…
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Review v5 (spec+plan): document cloud GC as single-writer/best-effort (drop 'race-safe' overclaim, add Concurrency model section + plan precondition gate); correct cost note for the post-commit rea…
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Reframe cloud concurrency as last-writer-wins (per decision)
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Plan/spec tighten-ups (non-blocking): non-vacuous local suspicious-pointer test (seed real chunk keys, assert they survive); expand_root errors on empty instead of silent default; reserved-key erro…
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feat(fastly): add prior_chunk_keys for chunk GC (Value-first, v1-validated, prefix-scoped) + unit tests
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feat(fastly): add chunk-GC planning helpers (expand_root, orphan_chunk_keys, reject_reserved_root_keys, FastlyConfigGcPlan) + unit tests
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feat(fastly): prune prior config chunks on local re-push
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feat(fastly): reclaim prior config chunks after cloud re-push (last-writer-wins)
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chore(fastly): satisfy strict clippy for chunk-GC code; render fake fastly via handlebars
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chore(fastly): hoist fake-fastly TEMPLATE const above statements (items_after_statements)
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test(fastly): close self-review coverage gaps
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Commits on Jul 9, 2026

fix(fastly): dry-run classifies malformed local state as unknown; test delete argv + cloud shrink-to-direct
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Commits on Jul 12, 2026

fix(fastly): redact describe payloads from diagnostics (P1); reject duplicate root keys (P2)
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Commits on Jul 13, 2026

Commits on Jul 14, 2026

Commits on Jul 15, 2026

feat(cli): wire `config gc` into the bundled + app-demo CLIs
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Commits on Jul 17, 2026

Commits on Jul 18, 2026

Commits on Jul 19, 2026

Commits on Jul 20, 2026

Restore v1 byte threshold on read, pin exact split boundaries
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Commits on Jul 21, 2026

Compile the fastly+cli wasm32-wasip1 combination cleanly
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Commits on Jul 23, 2026

Restore raw ConfigStore contract; atomic local rewrite; align GC with runtime
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Commits on Jul 26, 2026

Serialise local pushes with a lock; refine GC foreign-value handling
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Commits on Jul 27, 2026

Fix GC unknown-kind data loss, widen manifest lock, harden staging
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Commits on Jul 28, 2026

Make corrupt generations repairable; symmetric unknown-kind protection
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Commits on Jul 29, 2026

Refine read taxonomy: repairable corruption vs infra/unknown; local symmetry
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Commits on Jul 30, 2026

Fail closed on future formats, ambiguous chunk not-found; generic repair
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Commits on Aug 1, 2026

Type future-format through resolution; fail closed on ambiguous root/store reads
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Commits on Aug 2, 2026

Schema-agnostic future detection; confirmed-absence reads; store returns verbatim
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