Brummel
43b1b6fc25
The semantic index was ~90 896 per-entry files (index/embeddings/<safe-model>/
<sha256>.f32), a deployment liability: the file count — not the 356 MB — is
hostile to container layers, object storage, and Git-LFS, and Pipeline::load
opened every one individually. This packs a complete per-file store into one
self-describing matrix file loaded in a single read.
New src/packed.rs owns the format: 4-byte magic "AIPK", u32 LE format_version,
u32 LE header length, a JSON PackedHeader {n_rows, dim, embed_model,
corpus_sha256, corpus_name}, pad to a 4-byte boundary, then row-major
little-endian f32 payload in corpus order (row i = corpus entry i). write_packed
is atomic (temp+rename); read_packed rejects a wrong magic, a newer-than-
supported version, a malformed header, or a payload length inconsistent with
n_rows×dim. corpus_sha256 hashes the raw corpus file bytes.
Pipeline::load now calls a free fn load_packed_or_store(cfg, entries) that
prefers the packed file and falls back to today's all-or-nothing per-file store,
reporting which path it took via a new IndexStatus {Ok, Absent, Mismatch}
carried into Diagnostics. `alpha-id index --pack` writes the file from a
complete store (refusing an incomplete one with exit 2), recording corpus_sha256
+ embed_model in the header as the artifact-binding data.
Iteration boundary (deliberate): this is iteration 1 of the packed-versioned-
bundle cycle. load_packed_or_store validates the packed file STRUCTURALLY only
(magic/version/payload length via read_packed, plus n_rows == entries.len());
it does NOT yet compare the header's corpus_sha256/embed_model against the live
config, and IndexStatus::Mismatch fires only on structural corruption. The
load-time mismatch warning, the index= token on the diagnostics line, and the
Hybrid-degrade-names-reason wiring are iteration 2 (issue #4), which consumes
the binding data this commit writes. The per-file store is untouched — it stays
the build/resume path; the packed file is an additive serve-path artifact.
mmap was considered and rejected: the brute-force full-scan cosine search
touches every row per query, so memory-mapping yields no runtime benefit over a
single read and would add an unsafe dependency (spec § Out of scope).
Verification: cargo test green (61 tests; 9 new — 3 format round-trip/hash/bad-
magic, 4 load-path incl. packed-beats-store and structural n_rows mismatch, 2
--pack CLI incl. exit-2 refusal). An end-to-end seam test writes the packed
file via the CLI, removes the per-file store, and asserts the pipeline builds
its index from the packed file alone as IndexStatus::Ok (#3 acceptance b).
Spec: docs/specs/2026-05-31-packed-versioned-index-bundle.md
Plan: docs/plans/2026-06-01-packed-versioned-bundle-iter1.md
closes #3
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
74 lines
2.5 KiB
Rust
74 lines
2.5 KiB
Rust
use alpha_id::model::{AlphaIdEntry, Config, IndexStatus};
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use alpha_id::packed::{packed_path, write_packed, PackedHeader};
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use alpha_id::pipeline::load_packed_or_store;
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fn entry(text: &str) -> AlphaIdEntry {
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AlphaIdEntry {
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alpha_id: "X".to_string(),
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valid: true,
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icd_primary: "A00".to_string(),
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icd_star: String::new(),
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icd_addon: String::new(),
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icd_primary2: String::new(),
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orpha: String::new(),
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text: text.to_string(),
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}
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}
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fn cfg_in(dir: &std::path::Path) -> Config {
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let mut cfg = Config::load("config/default.toml").unwrap();
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cfg.index_dir = dir.to_str().unwrap().to_string();
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cfg.embed_model = "test/model".to_string();
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cfg
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}
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#[test]
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fn index_status_defaults_to_absent() {
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assert_eq!(IndexStatus::default(), IndexStatus::Absent);
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}
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#[test]
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fn index_status_serializes_externally_tagged() {
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let j = serde_json::to_string(&IndexStatus::Mismatch("x".to_string())).unwrap();
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assert!(j.contains("Mismatch"), "got {j}");
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}
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#[test]
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fn packed_beats_store_builds_without_store() {
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let dir = tempfile::tempdir().unwrap();
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let cfg = cfg_in(dir.path());
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let entries = vec![entry("a"), entry("b")];
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let rows = vec![vec![1.0f32, 0.0], vec![0.0f32, 1.0]];
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let h = PackedHeader {
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n_rows: 2,
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dim: 2,
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embed_model: cfg.embed_model.clone(),
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corpus_sha256: "irrelevant-in-iter1".to_string(),
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corpus_name: "c.txt".to_string(),
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};
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write_packed(&packed_path(&cfg.index_dir, &cfg.embed_model), &h, &rows).unwrap();
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// No per-file store populated in `dir`; the index must come from the packed file.
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let (vector, status) = load_packed_or_store(&cfg, &entries);
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assert!(vector.is_some());
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assert_eq!(status, IndexStatus::Ok);
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}
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#[test]
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fn n_rows_mismatch_yields_mismatch_none() {
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let dir = tempfile::tempdir().unwrap();
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let cfg = cfg_in(dir.path());
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let entries = vec![entry("a"), entry("b"), entry("c")]; // 3 entries
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let rows = vec![vec![1.0f32, 0.0], vec![0.0f32, 1.0]]; // packed claims 2 rows
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let h = PackedHeader {
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n_rows: 2,
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dim: 2,
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embed_model: cfg.embed_model.clone(),
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corpus_sha256: "x".to_string(),
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corpus_name: "c.txt".to_string(),
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};
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write_packed(&packed_path(&cfg.index_dir, &cfg.embed_model), &h, &rows).unwrap();
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let (vector, status) = load_packed_or_store(&cfg, &entries);
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assert!(vector.is_none());
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assert!(matches!(status, IndexStatus::Mismatch(_)));
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}
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