fix: make the staging-store kit mandatory and align the record ceiling with the block limit - #1310
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This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: Path: .coderabbit.yaml Review profile: CHILL Plan: Pro Plus Run ID: WalkthroughThe change lowers the engine content ceiling from 4 MiB to 2 MiB and updates DAG coverage. It also makes staging-store failure checks mandatory through one backing-aware conformance kit across in-memory, desktop, WASM, and browser hosts. ChangesContent size ceiling
Staging-store conformance
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to The staging-store conformance and record-ceiling changes are covered by the supplied passing checks; the remaining redundant comment has no runtime or user impact, so no actionable merge-blocking risk remains. Sequence Diagram(s)sequenceDiagram
participant BrowserWorker
participant WasmBridge
participant StagingKit
participant OpfsStagingStore
BrowserWorker->>BrowserWorker: Reset IndexedDB and OPFS for each backing
BrowserWorker->>WasmBridge: runStagingStoreConformance(open_backing, arm_failed_put)
WasmBridge->>StagingKit: check(open, arm_failed_put)
StagingKit->>OpfsStagingStore: Open Ordering, FailedReplacement, and FailedFirstPut
StagingKit->>OpfsStagingStore: Execute durability and failure-atomicity checks
BrowserWorker->>OpfsStagingStore: Verify staged-directory entry counts
Possibly related PRs
Suggested labels: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@packages/client/test/browser/conformance.worker.ts`:
- Line 178: Remove the redundant comment above runStagingConformance; do not
replace it unless documenting a concise, non-obvious reason the helper requires
isolated stores.
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📒 Files selected for processing (17)
blueprint/core.mdcrates/desktop-seams/tests/conformance.rscrates/engine/kat/vectors/content/dag_capacity_accept.jsoncrates/engine/kat/vectors/content/dag_capacity_reject.jsoncrates/engine/src/content/dag.rscrates/engine/src/content/limits.rscrates/engine/src/content/profile.rscrates/engine/src/testkit/conformance/mod.rscrates/engine/src/testkit/conformance/staging_store.rscrates/engine/src/testkit/fakes/mod.rscrates/engine/src/testkit/fakes/staging_store.rscrates/engine/tests/conformance_fakes.rscrates/engine/tests/content_wipe.rscrates/engine/tests/staging_atomic_put.rscrates/wasm/src/conformance.rspackages/client/test/browser/conformance.spec.tspackages/client/test/browser/conformance.worker.ts
💤 Files with no reviewable changes (1)
- packages/client/test/browser/conformance.spec.ts
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| Filename | Overview |
|---|---|
| crates/engine/src/testkit/conformance/staging_store.rs | Consolidates all staging-store contract phases into one required check using distinct durable backings. |
| crates/desktop-seams/tests/conformance.rs | Adapts the desktop store to the unified kit with platform-portable failure levers. |
| crates/wasm/src/conformance.rs | Replaces separate staging conformance exports with a backing-aware WASM bridge. |
| packages/client/test/browser/conformance.worker.ts | Runs the complete staging kit under both OPFS fault modes and verifies per-backing debris counts. |
| crates/engine/src/content/limits.rs | Lowers the resolved-record ceiling to 2 MiB and adds a compile-time production-profile invariant. |
| crates/engine/src/content/profile.rs | Makes content profiles exceeding the sealed-block ceiling unrepresentable. |
| crates/engine/src/content/dag.rs | Updates DAG capacity boundary tests and reservation checks for the reduced ceiling. |
Flowchart
%%{init: {'theme': 'neutral'}}%%
flowchart LR
Check[Unified staging-store check]
Check --> Ordering[Ordering backing]
Check --> Replacement[Failed-replacement backing]
Check --> FirstPut[Failed-first-put backing]
Ordering --> Reopen1[Reopen and verify durability]
Replacement --> Arm1[Arm fault]
Arm1 --> Verify1[Verify previous bytes survive]
FirstPut --> Arm2[Arm fault]
Arm2 --> Verify2[Verify key remains absent]
Reviews (2): Last reviewed commit: "test: say why the staging kit's stores a..." | Re-trigger Greptile
…limit MAX_RESOLVED_RECORD_BYTES was 4 MiB while Kubo block/put refuses anything over 2 MiB, so the engine would author, sign and hand off a head or DAG root between the two that its own ingress then rejects. Lower the ceiling to the block limit, so HeadTooLarge/RootTooLarge fire client-side as permanent, actionable errors. Add a const assertion tying the shipped sealed-leaf size to the ceiling: one extra framing byte would make every content block the engine authors unpinnable, and a compile-time check cannot be stripped in release. The flat-DAG ceiling halves with the cap, so the KAT capacity vectors are regenerated through the committed generator. Closes #915
… check check_failed_put and check_failed_first_put were entry points beside check, so a host that called check and stopped was held to half the contract with nothing at compile time, in CI, or in review to say a case was skipped - the same shape as the seam drift the failed-put case was written to catch. The fault lever is now a parameter of check, and the three phases each take their own named backing, so omitting the lever is a compile error rather than an omission. Every other kit already had a single entry point, so the shape is uniform again. The desktop first-put lever is now portable: it removes the still-empty staged directory rather than denying writes to it, which Windows honours where it honours no denial on a path that does not exist yet, so the case no longer skips on Windows. Closes #1195
…iling The const assertion covers only the shipped profile, but ContentProfile is injected and ContentProfile::new accepts any nonzero chunk size, so an oversized profile would frame leaves this engine's own read_block rejects. ContentProfile::new now fails closed on that the same way it fails closed on zero, which is the release-active half of the rule 8 pair. Also fold the sizing-vs-encoder refusal agreement into the existing over-cap test rather than a second pass over 65k-link DAGs.
Backing::ALL is exported through the wasm bridge so the browser host prepares and asserts over the kit's own backing set instead of a transcribed copy, and the desktop host's lever match is exhaustive so a new backing breaks the build rather than silently arming the wrong store.
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Review dispositionCodeRabbit:
The suggestion was to delete the comment or state why the helper owns isolated stores. Deleting it would have dropped the second half: This push also rebases onto |
1 participant
Two contracts that documented more than they enforced.
The staging-store kit is one mandatory
checkcheck_failed_putandcheck_failed_first_putwere entry points besidecheck, so a host that calledcheckand stopped was held to half theStagingStorecontract with nothing at compile time, in CI, or in review tosay a case had been skipped. That is the same shape as the browser/desktop seam
drift the failed-put case was written to catch.
The fault lever is now a required parameter of the single
check, and the kitruns three phases against three named backings (
Backing::Ordering,FailedReplacement,FailedFirstPut) — each its own initially empty durablestate, reopened on repeat asks. Dropping the lever from a host's call no longer
compiles. Every other kit in
testkit/conformancealready had exactly onecheck, so the shape is uniform again; the module header now states the rule.Hosts moved with it:
FileStagingStore— one test instead of three,crates/desktop-seams/tests/conformance.rsStagingStoreAdapter— one wasm export (runStagingStoreConformance) instead of threeInMemoryStagingStore— a newInMemoryStagingBackingsfake hands one store per backingBacking::ALLis exported through the bridge asstagingStoreBackings(), sothe browser host prepares and asserts over the set the kit declares rather than
a transcribed copy of it, and the desktop host's lever match is exhaustive.
The
#[cfg(unix)]hazard: made portable, gate removedfile_staging_store_passes_the_failed_first_put_kitwas Unix-only because theWindows lever denies a read-only sidecar, and a first put has no sidecar yet.
Rather than keep a platform gate on a now-mandatory case, the first-put lever
changed: it removes the still-empty
staged/directory, soatomic_write'stemp file has nowhere to land. That fails the put identically on both platforms
(the Unix lever also fails at
File::createinstaged/), loses nothing —the backing is empty by definition in that phase — and
FileStagingStore::openrecreates the directory for the kit's read-back. No
#[cfg]remains on anystaging-store conformance test.
Browser leg
The kit now runs end to end under both OPFS write faults (short write and
throwing write) rather than only the failed-put phases, and still asserts the
staged-directory entry counts afterwards — the debris check no kit assertion
can make. Each fault pass uses its own store names: the kit's handles stay
open, and an IndexedDB delete under an open connection blocks rather than
clears.
Negative controls still fire, one per failure phase: a host that destroys the
previous bytes is caught by the replacement phase, and a host that strands a
partial record where the key held none is caught by the first-put phase. The
in-memory fake's strand injector now strands only when the key is absent, so it
is honest on replacement and reaches the phase it is a control for.
Closes #1195
The record ceiling is the IPFS block ceiling
MAX_RESOLVED_RECORD_BYTESwas 4 MiB whileblock/putrefuses anything over2 MiB, so a head or DAG root between the two was authorable, signable, and then
refused by the engine's own ingress. Lowered to the block limit, so
HeadTooLarge/RootTooLargefire client-side as permanent, actionable errors.Rule 8 cover for the sealed leaf is a pair, because the chunk size is injected:
constassertion incontent/limits.rspins the shippedContentProfile::PRODUCTIONagainst the ceiling at build time, where nothingcan strip it;
ContentProfile::newnow returnsNonefor a chunk size that seals past theceiling, exactly as it already does for zero. That is the release-active
half, and it covers every injected profile — a profile that frames leaves
this engine's own
read_blockrejects is unrepresentable rather than merelyguarded.
new_rejects_a_chunk_size_that_seals_past_the_block_ceilingand thewhole
content::suite were run undercargo test --release.assemble_accepts_a_root_just_under_the_block_capwas re-authored rather thandeleted: 100k links (~3.8 MiB) no longer fit, so it now assembles 54k links and
asserts the root is both under the cap and within a tenth of it, so the
accepting side of the guard is exercised at the boundary instead of far below
it.
Closes #915
Fallout the issue did not list
Regenerated through the committed generator
(
cargo run -p cipherbox-engine --example kat_gen): 110375 links → 55187.root_block_len_matches_the_assembled_rootcompared the sizing arithmeticagainst the encoder at leaf counts that are now over-cap. Its counts drop to
the reachable range, and the over-cap agreement moved into
assemble_fails_closed_when_the_root_exceeds_the_block_cap, which nowasserts the reservation arithmetic refuses the same root at the same size.
content_wipe.rs's assembly-buffer growth test framed 2 MiB chunks, whosesealed leaves are now over-cap. Its chunk size drops to 1 MiB, which still
overruns the preallocation. This touches a file another PR is editing.
blueprint/core.mdcited "the 4 MiB block ceiling" for the coupledhistory-link retention bound.
Known duplication, not addressed here
The 2 MiB ingress ceiling is now declared in three places:
content/limits.rs,crates/load/src/plan.rs(MAX_BLOCK_BYTES), andapps/api/src/app-setup.ts(DEFAULT_MAX_UPLOAD_BYTES, overridable byMAX_UPLOAD_BYTES). Unifying them means widening the engine constant'svisibility and reaching into two other packages; the live contract suite is the
right place to pin the relationship instead.
Verification
cargo fmt --all --check,cargo clippy --all-targets(clean),cargo test --workspace(green),cargo test --release -p cipherbox-engine --lib content::,the Playwright browser conformance suite (9 passed),
pnpm typecheck,pnpm lint,pnpm lint:md,pnpm lint:tracker-refs./simplifyand/security-reviewwere run on this diff. The security passfound no HIGH or MEDIUM findings: the ceiling change is monotonically more
restrictive on the decode side, every encode site reads the same constant, the
regenerated KAT vectors still bind, and the conformance kit is gated out of
every production build (
test-kit/conformancefeatures).The Windows leg of the desktop kit cannot be run locally; it rests on
fs::remove_dirof an empty directory andFile::createunder a missingparent, both platform-neutral in
std.Summary by CodeRabbit
Bug Fixes
Tests
Documentation
Note
Reduce the block size ceiling to 2 MiB and make the staging-store kit mandatory
MAX_RESOLVED_RECORD_BYTESfrom 4 MiB to 2 MiB in limits.rs; any assembled root or fetched block exceeding this limit is rejected, and the DAG capacity test vectors are updated accordingly.ContentProfile::newnow rejects chunk sizes whose sealed leaf would exceed the 2 MiB ceiling, preventing construction of profiles that would produce unpinnable content.check(open, arm_failed_put)entrypoint parameterized by aBackingenum, replacing three separate test runners across Rust, WASM, and browser conformance layers.runStagingStoreFailedPutConformanceandrunStagingStoreFailedFirstPutConformance; callers must now supply per-backingopenandarm_failed_putcallbacks to the unified runner.Macroscope summarized 63d9aa1.