Retention recovery, crash-matrix evidence, reader fence, and model-based transitions (item 6) - #99
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Retention publication refuses every retained stage as recovery-required, and nothing yet decides what a retained stage means. This adds the storage-independent half of that decision. assess_root_stage, assess_manifest_stage, and assess_head_stage classify each fixed stage as absent, complete, truncated, or corrupt, using the decoders' own truncation variants so a crash mid-write and a complete-looking record that fails a checksum are told apart. RetentionRecoveryEvidence binds those assessments to the observed current state and to whether each pool already holds the entry a complete stage names. plan_retention_recovery is pure over that evidence and applies the documented classification: a truncated stage with no later-ordered effect is discarded; a complete root or manifest stage is linked into its pool and retained as a recovery-protected orphan; a complete head over linked stages is finalized and both stages removed; stages the published head already names are cleaned up; everything else is a typed RetentionRecoveryRefusal before any effect. Eleven laws over the golden version-two records cover every crash prefix the recovery page names, including the successor case against a published generation. No I/O happens here; the storage port and executor follow. Refs #19
RetentionRecoveryStorage names one durable capability per recovery step: discard a truncated stage, link a complete root or manifest stage into its pool, finalize the head, and remove a retained stage after its link is proven. Each capability owns its complete effect and the synchronization that makes it durable, so an implementation cannot report a step done before its evidence would survive process death. execute_retention_recovery runs a plan in order, calling exactly one capability per step, and stops at the first refusal with the refused step, the completed prefix, and the storage's error as source; the caller re-observes and re-plans rather than continuing from stale evidence. The receipt records the executed steps and the plan's outcome. Three laws against a recording fake storage pin the mapping, the empty plan, and the refusal prefix. Refs #19
FilesystemRetentionPublicationAuthority::recover observes the published state, reads root.next, manifest.next, and head.next within their format bounds (one byte past the bound so an oversized stage is corrupt rather than truncated), looks up the pool entries the complete stages name, plans through plan_retention_recovery, and executes the plan as the RetentionRecoveryStorage implementation under the retained writer lock. Complete stages are reopened through the new FilesystemRetentionStage::reopen, which binds the handle and the named entry to their identity exactly as a freshly created stage is, so link, replace, and remove refuse a substituted stage during recovery too. A truncated stage is discarded only after its kind, length, and identity match what was observed. Every step synchronizes the directory it changed before returning. Four laws build real crash prefixes by driving the publication phases directly and stopping: a clean store is clean; a root stage written and synchronized is linked and retained as a protected orphan; a head stage synchronized before the crash is finalized, the stages are removed, and the byte-identical retry reports AlreadyCommitted; a truncated root stage is discarded. Publication does not yet call recover itself; that wiring follows. Refs #19
…ted state The retention fixture now drives all 18 storage-port phases in RetentionPublicationPhase::ALL order and stops after any prefix, which is the exact state a process death after that phase leaves behind. Three laws use it. The first walks every prefix from 0 through 18 in a fresh store and requires the documented recovery steps and outcome, the stages left behind, idempotent re-recovery, and the forward retry's result: published after a clean prefix, refused as recovery-required while protected orphans remain, already committed once the head is finalized. The second truncates each stage mid-write and requires only that stage discarded. The third replays successor prefixes over a published generation and requires the committed head to name the successor. recovery.md states that storage execution now exists and only process-death evidence remains; the RETENTION-007 ledger cell names the laws. Refs #19
The retention publication page has always listed "completes recovery of every
fixed retention stage" as publication's first step, and until now the
filesystem writer refused every retained stage instead, which left an
interrupted publication waiting for a human.
verify_current now calls recover before anything else. A clean or committed
outcome continues; a protected outcome (complete orphans awaiting explicit
disposition) refuses RetainedStage as before; recovery's planning refusal and
step failure travel as RecoveryRefused { source } and RecoveryStepRefused
{ source } through RetentionCurrentStateRefusal, so callers keep recovery's
own reason.
Three laws that pinned the refuse-everything doctrine now pin the recovered
behaviour: a truncated manifest stage is discarded and publication publishes
(this law failed before the change), a complete orphan root stage still
refuses and stays retained and linked, and a complete head stage without its
manifest refuses with recovery's ambiguity. README, the version-two overview,
the retention page, and the ledger nonclaims describe the recovered behaviour
and name the two remaining waits: complete orphans until disposition (#21)
and process-death evidence (#19).
Refs #19 #21
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Summary by CodeRabbit
WalkthroughThis change adds version-two retention recovery, fenced reader snapshots, model-based transition checks, fixed-field checks for interrupted records, and retention publication coverage in the durability crash matrix. ChangesVersion-two retention
Priority: ➖ Normal Estimated code review effort: 5 (Critical) | ~90 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Authority as FilesystemRetentionPublicationAuthority
participant Observation as RetentionRecoveryObservation
participant Planner as plan_retention_recovery
participant Executor as execute_retention_recovery
participant Storage as RetentionRecoveryStorage
Authority->>Observation: Observe stages and pools
Observation->>Planner: Provide RetentionRecoveryEvidence
Planner-->>Authority: Return plan or refusal
Authority->>Executor: Execute recovery plan
Executor->>Storage: Invoke planned capabilities
Storage-->>Executor: Return capability result
Merge Risk: 🟡 Moderate · up to The retention recovery and snapshot changes have several open review concerns. Resolve the snapshot catalog-loading consistency gap and the crash-point contract test failure before merging. The rest are minor test and documentation cleanups. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to Recovery has substantial identity and consistency checks. However, the new snapshot path can reload catalog data through a replaced filesystem path while retaining the original store’s lock and retention state. This requires control of the local path, but can undermine snapshot integrity. Retained concerns
Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 51.52% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 297 functions across 74 files. (8 skipped: 8 unsupported.)
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Inline comments:
In `@docs/formats/segment-store-v2/requirements.md`:
- Line 18: Update the KEEP-RETENTION-007 requirement wording to distinguish
exhaustive recovery coverage for publication prefixes from the sampled successor
coverage: replace the unqualified “successor prefixes recover” phrasing with
“four representative successor prefixes recover.” Preserve the existing claims
for every publication prefix and each mid-write truncation.
In `@README.md`:
- Around line 72-75: Update the restart-recovery status statements in the
Version 2 documentation and the segment-store V2 documentation: replace the
claims that retention-publication or retained-stage recovery is planned with the
remaining KEEP-CRASH-036..052 process-death evidence gap and the partial-prefix
migration recovery gap.
In `@src/adapters/retention/filesystem_retention_current.rs`:
- Line 68: Update ObservedRetentionState::for_tests to validate the
head-to-manifest binding before constructing the state, matching observe’s
digest, generation, and predecessor consistency checks; reject inconsistent
records rather than allowing impossible recovery states.
In `@src/adapters/retention/filesystem_retention_recovery_observation.rs`:
- Around line 19-20: Replace the local MANIFEST_MAXIMUM_ENCODED_LENGTH value in
the retention recovery observation with the codec-owned maximum-length constant,
and expose that constant from the manifest codec as needed. Ensure read_stage
uses the shared value so its truncation bound remains consistent with
manifest_header_decoder and RetentionManifest::MAXIMUM_ENTRY_COUNT.
In `@src/adapters/retention/filesystem_retention_recovery_tests.rs`:
- Around line 93-110: The filesystem recovery tests need a full-length corrupted
root.next case in addition to truncation. Add a test using the existing
fixture/setup helpers that alters the checksum while preserving stage length,
invokes authority.recover(), and verifies the failure is
FilesystemRetentionRecoveryError::Plan containing
RetentionRecoveryRefusal::StageCorrupt; also assert root.next remains and the
filesystem observation classifies it as RetentionStageAssessment::Corrupt
through RetentionRecoveryObservation::read_stage.
In `@src/adapters/retention/filesystem_retention_storage_tests.rs`:
- Around line 80-83: Strengthen both retention recovery tests by matching the
inner source of RecoveryRefused against
RetentionRecoveryRefusal::HeadStageWithoutManifestStage, rather than accepting
any RecoveryRefused variant. Apply this assertion in both tests while preserving
the existing migrated-store setup.
In `@src/adapters/retention/filesystem_retention_storage.rs`:
- Line 33: Update RetentionCurrentStateRefusal and verify_current so
FilesystemRetentionRecoveryError::Observe is wrapped as
RecoveryObservationRefused { source } rather than returned as the raw io::Error.
Add matching message() and source() handling while preserving the original error
source and existing behavior for other refusal variants.
In `@src/adapters/retention/filesystem_retention_test_fixture.rs`:
- Around line 286-305: Replace the positional `phases` closure array with
iteration over `RetentionPublicationPhase::ALL`, dispatching each enum variant
to its corresponding authority method while preserving the existing order and
behavior. Ensure the mapping is exhaustive so additions, removals, or reordering
in `ALL` are reflected by the fixture rather than maintained separately.
In `@src/adapters/retention/recovery_execution_tests.rs`:
- Line 111: Add a recovery test case for refusal at Step::FinalizeHead,
configuring refuse_at accordingly and asserting that error.executed() and
storage.calls are both empty while preserving the existing post-FinalizeHead
refusal coverage.
In `@src/adapters/retention/recovery_planner.rs`:
- Line 93: Update the match arm in the recovery planner to distinguish
(Some(head), Some(manifest), None) from cases without a manifest, returning the
existing Refusal::ManifestStageWithoutRootStage variant when the manifest is
present but its root stage is missing; preserve HeadStageWithoutManifestStage
for cases where the head lacks a manifest.
In `@src/adapters/retention/recovery_storage.rs`:
- Around line 11-17: Introduce a dedicated recovery-storage error type with
typed ExactRecordRefusal variants and a source-preserving I/O variant, then
update RetentionRecoveryStorage’s eight capabilities and RetentionRecoveryError
to propagate it instead of flattening refusals into io::Error. Ensure
FilesystemRetentionStage::retention_error preserves each refusal variant, and
add coverage verifying the distinct refusal variants reach callers unchanged.
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CHANGELOG.mdREADME.mddocs/formats/segment-store-v2/README.mddocs/formats/segment-store-v2/recovery.mddocs/formats/segment-store-v2/requirements.mddocs/formats/segment-store-v2/retention.mdsrc/adapters/filesystem_exact_record.rssrc/adapters/retention.rssrc/adapters/retention/filesystem_retention_attempt_tests.rssrc/adapters/retention/filesystem_retention_authority.rssrc/adapters/retention/filesystem_retention_current.rssrc/adapters/retention/filesystem_retention_recovery.rssrc/adapters/retention/filesystem_retention_recovery_error.rssrc/adapters/retention/filesystem_retention_recovery_observation.rssrc/adapters/retention/filesystem_retention_recovery_prefix_tests.rssrc/adapters/retention/filesystem_retention_recovery_tests.rssrc/adapters/retention/filesystem_retention_refusal.rssrc/adapters/retention/filesystem_retention_stage.rssrc/adapters/retention/filesystem_retention_storage.rssrc/adapters/retention/filesystem_retention_storage_tests.rssrc/adapters/retention/filesystem_retention_test_fixture.rssrc/adapters/retention/recovery_evidence.rssrc/adapters/retention/recovery_execution.rssrc/adapters/retention/recovery_execution_tests.rssrc/adapters/retention/recovery_plan.rssrc/adapters/retention/recovery_planner.rssrc/adapters/retention/recovery_planner_tests.rssrc/adapters/retention/recovery_refusal.rssrc/adapters/retention/recovery_stage_assessment.rssrc/adapters/retention/recovery_storage.rssrc/lib.rs
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Files:
src/adapters/retention/filesystem_retention_recovery_tests.rssrc/adapters/retention/filesystem_retention_recovery_prefix_tests.rssrc/adapters/retention/filesystem_retention_test_fixture.rssrc/adapters/retention/recovery_execution_tests.rssrc/adapters/retention/filesystem_retention_attempt_tests.rssrc/adapters/retention/filesystem_retention_storage_tests.rssrc/adapters/retention/recovery_planner_tests.rs
This is a pure Rust project.
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Files:
src/adapters/retention/filesystem_retention_recovery_tests.rssrc/adapters/retention/recovery_plan.rssrc/adapters/retention/filesystem_retention_current.rssrc/adapters/retention/filesystem_retention_recovery_observation.rssrc/adapters/retention/filesystem_retention_recovery_error.rssrc/adapters/retention/filesystem_retention_storage.rssrc/adapters/retention/filesystem_retention_recovery.rssrc/adapters/retention/filesystem_retention_recovery_prefix_tests.rssrc/adapters/retention/filesystem_retention_test_fixture.rssrc/adapters/retention/filesystem_retention_authority.rssrc/adapters/retention/filesystem_retention_stage.rssrc/adapters/retention/recovery_storage.rssrc/adapters/retention/recovery_execution_tests.rssrc/adapters/retention/recovery_execution.rssrc/adapters/retention/filesystem_retention_attempt_tests.rssrc/adapters/filesystem_exact_record.rssrc/lib.rssrc/adapters/retention/recovery_refusal.rssrc/adapters/retention.rssrc/adapters/retention/filesystem_retention_storage_tests.rssrc/adapters/retention/filesystem_retention_refusal.rssrc/adapters/retention/recovery_evidence.rssrc/adapters/retention/recovery_planner.rssrc/adapters/retention/recovery_planner_tests.rssrc/adapters/retention/recovery_stage_assessment.rs
🧠 Learnings (1)
📚 Learning: 2026-07-27T22:37:16.896Z
Learnt from: flyingrobots
Repo: flyingrobots/keep PR: 49
File: src/layout/record_length.rs:29-29
Timestamp: 2026-07-27T22:37:16.896Z
Learning: This repository targets Rust 1.96 (per `Cargo.toml` `rust-version` and `rust-toolchain.toml`). When writing or reviewing Rust code, only use APIs/language features stabilized in Rust 1.96 or earlier. Avoid using newer std/library APIs that wouldn’t be available on Rust 1.96 (e.g., you may rely on `u64::is_multiple_of` since it’s stabilized by 1.96).
Applied to files:
src/adapters/retention/recovery_plan.rssrc/adapters/retention/filesystem_retention_recovery_error.rssrc/adapters/retention/filesystem_retention_recovery_prefix_tests.rssrc/adapters/retention/recovery_execution_tests.rs
🔇 Additional comments (22)
src/adapters/retention/recovery_plan.rs (1)
4-22: LGTM!Also applies to: 46-70
src/adapters/retention/recovery_planner.rs (2)
35-81: LGTM!Also applies to: 222-283
165-170: 🗄️ Data Integrity & IntegrationNo change required.
filesystem_retention_current::observerequires the current manifest pool entry. Whenis_committedmatchesmanifest.nextto the observed head, both use the same generation and digest, sopool_entrycannot reportPool::Absent. It reportsPool::IdenticalorPool::Different; the latter is rejected before cleanup. The proposed guard is therefore unreachable for the observed committed state.src/adapters/retention/filesystem_retention_recovery_observation.rs (1)
40-88: LGTM!Also applies to: 120-154
src/adapters/filesystem_exact_record.rs (1)
208-209: LGTM!src/adapters/retention/recovery_execution.rs (1)
15-71: LGTM!Also applies to: 83-112
src/adapters/retention/recovery_execution_tests.rs (1)
11-52: LGTM!Also applies to: 60-94
src/adapters/retention/filesystem_retention_stage.rs (1)
45-48: 🩺 Stability & AvailabilityKeep
reopenread-only. Recovery uses the reopened stage forlink,replace, andremove; it synchronizes directories instead.FilesystemRetentionStage::synchronizeis called only for stages created byFilesystemRetentionStage::create, so the read-only recovery handle never reachessync_all.src/adapters/retention/filesystem_retention_authority.rs (1)
12-12: LGTM!Also applies to: 36-36, 73-73
src/adapters/retention/filesystem_retention_recovery_error.rs (1)
1-48: LGTM!src/adapters/retention/filesystem_retention_refusal.rs (1)
8-8: LGTM!Also applies to: 126-135, 242-245, 271-272
src/adapters/retention/filesystem_retention_storage.rs (1)
41-46: LGTM!src/adapters/retention/filesystem_retention_storage_tests.rs (1)
155-199: LGTM!src/adapters/retention/filesystem_retention_recovery.rs (1)
127-143: 🩺 Stability & AvailabilityNo change required.
FilesystemRetentionStagehas noDropimplementation or deferred commit. Filesystem mutations occur only through explicit methods such assynchronize,link,remove, andreplace; clearingself.recoveryonly closes the reopened handles.src/adapters/retention/filesystem_retention_test_fixture.rs (1)
11-11: LGTM!Also applies to: 266-284
src/adapters/retention/filesystem_retention_recovery_tests.rs (1)
15-90: LGTM!src/adapters/retention/filesystem_retention_recovery_prefix_tests.rs (1)
18-54: LGTM!Also applies to: 59-79, 81-138, 140-174, 176-208
CHANGELOG.md (1)
13-35: LGTM!docs/formats/segment-store-v2/recovery.md (1)
235-237: LGTM!docs/formats/segment-store-v2/requirements.md (1)
63-67: LGTM!docs/formats/segment-store-v2/retention.md (1)
168-170: LGTM!docs/formats/segment-store-v2/README.md (1)
100-100: 📐 Maintainability & Code QualityDo not flag line 100 for MD013. The repository disables
MD013, so the 128-character line does not fail the configured Markdown lint.
The durability crash matrix now covers KEEP-CRASH-036 through 052. A child initializes a store, writes the golden bundle corpus, migrates it through all 21 phases, reopens it as version two, prepares retention generation one against the bundle catalog snapshot, and publishes through a decorator that dies before, during, or after the selected phase. During a stage write the decorator leaves a 100-byte prefix, inside every record's framing, so restart classifies it as truncated rather than corrupt. Restart reopens the store through the same admission a production caller would use, runs FilesystemRetentionPublicationAuthority::recover, and requires the documented steps and outcome for that exact prefix, then requires the forward retry to report what recovery predicts: published after a clean prefix, refused as recovery-required while protected orphans remain, already committed once the head is finalized. All 51 retention coordinates pass, and the complete 156-case matrix passes locally. FilesystemVersionTwoAdmission::reopen_unchecked_for_repository_tasks and FilesystemStoreMigrationAuthority::open_unchecked_for_repository_tasks give repository tools the bypass version one already had; every namespace, record, and identity law still applies through them. KEEP-RETENTION-007 is now Implemented in the ledger; the README, overview, and recovery page say that process-death evidence exists. Refs #19
Readers had no way to observe a version-two store that could not straddle a publication: nothing held the reader fence the recovery page specifies, and nothing bound the catalog head and the retention head to one instant. ReaderFence acquires a shared kernel lock on reader.lock, verified as a regular zero-length file reached without following links and re-verified after locking, and holds it for the snapshot's lifetime; collection will take the same lock exclusively, so no published root, manifest, or segment can be deleted under a live view. collect_retention_view is storage-independent: it reads both head coordinates, loads the view, reads them again, and accepts only agreement, retrying within a ReaderAttemptLimit and refusing an exhausted limit or an absent catalog. FilesystemRetentionSnapshot admits the root as version two, acquires the fence, collects the catalog snapshot, the retention head, and its manifest through that loop, and verifies each selected root against the manifest on demand while the fence is held. Four scripted-source laws pin the loop (first-attempt acceptance, retry after a publication between the reads, exhaustion, absent catalog). Five filesystem laws pin the fence and the view: an unpublished store binds the catalog and no head; a published generation is read and its root verified byte for byte; a substituted root refuses; two readers share the fence while an exclusive lock waits; a replaced reader.lock refuses. KEEP-RETENTION-008 is Implemented in the ledger; the README's fence gap is closed. Refs #19
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Actionable comments posted: 11
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Inline comments:
In `@docs/formats/segment-store-v2/README.md`:
- Line 103: Synchronize the v2 status summaries with the requirements ledger:
mark retention publication recovery and reader fencing as implemented, keep
partial-prefix migration recovery and model-based transition evidence planned
under issue `#19`, and keep garbage collection planned under issue `#21`. Update the
ownership wording from “the first four” to “the first three” in the requirements
summary and apply the same status correction to the format registry summary.
In `@src/adapters/filesystem_version_two_admission.rs`:
- Around line 78-84: Consolidate reopen_unchecked_for_tests and
reopen_unchecked_for_repository_tasks into one constructor gated by
#[cfg(any(test, feature = "repository-tasks"))], update all test callers to use
the retained constructor, and remove the duplicate implementation. Move the
“Releases the writer lock and the three pinned retention capabilities.”
documentation back above into_parts.
In `@src/adapters/retention.rs`:
- Line 152: Keep ReaderFence crate-private by changing its re-export in
retention.rs to pub(crate), and remove ReaderFence from the crate-root re-export
in lib.rs; leave FilesystemRetentionSnapshot and other public exports unchanged.
In `@src/adapters/retention/filesystem_retention_snapshot_tests.rs`:
- Around line 102-104: Update the assertion for the NonBlockingLockExclusive
call in the filesystem retention snapshot test to require Errno::WOULDBLOCK
specifically, while preserving the existing contention setup and failure
message.
- Around line 112-122: Add a deterministic test seam in the ReaderFence
acquisition flow that replaces reader.lock after the first verify and before
flock, then assert FilesystemRetentionSnapshotError::Fence from
FilesystemRetentionSnapshot::load. Rename
a_replaced_reader_lock_refuses_the_fence to
a_non_empty_reader_lock_refuses_the_fence for the existing non-empty-file case,
keeping the identity-swap scenario separate.
- Around line 86-89: Update the substituted-root test assertion to match
FilesystemRetentionSnapshotError::Root containing
RetentionRootDecodeError::ChecksumMismatch, rather than accepting any root
error. Preserve the existing test setup that flips the final root_bytes byte and
verify the specific wrapped checksum failure.
In `@src/adapters/retention/filesystem_retention_snapshot.rs`:
- Around line 73-74: Preserve the typed catalog-refusal boundary in the
retention snapshot load flow: update RetentionViewSource::load and its callers
so CatalogRestartError is not converted into io::Error, and ensure the failure
reaches the construction site around collect_retention_view as
FilesystemRetentionSnapshotError::Catalog rather than Error::View. Keep ordinary
I/O failures mapped to the existing view error path, and retain the documented
behavior of the load API.
- Line 73: Update the catalog-loading flow around
FilesystemCatalogSnapshot::load to use the pinned Dir capability opened for the
snapshot instead of re-resolving self.store_root by path. Ensure loading occurs
under the existing reader.lock fence and remains anchored to the same directory
capability used for the before/after coordinate comparisons.
In `@src/adapters/retention/retention_view_collector_tests.rs`:
- Around line 61-70: The retention view collector tests need coverage for
coordinate digest equality and I/O failures. Extend the tests around
collect_retention_view to add a same-generation/different-digest case, plus
failures for the initial coordinate read, load, and final coordinate read,
asserting RetentionViewError::Io; also update fn
a_publication_between_the_reads_discards_the_view_and_retries to assert
source.coordinates is empty after its two attempts.
In `@src/adapters/store_migration/filesystem_migration_authority.rs`:
- Around line 88-89: Update the admission construction around
FilesystemPlatformAdmission::unchecked_for_repository_tasks so clone_directory
failures map to Error::Namespace while root_identity_lenient failures continue
mapping to Error::RootIdentity; adjust the method’s # Errors documentation to
describe both failure boundaries.
In `@xtask/src/durability_crash_matrix/restart/retention.rs`:
- Around line 44-49: In the retention recovery flow around reopened_authority
and recover, load the persistent FilesystemRetentionSnapshot after recovery and
independently verify the expected retention_head generation and
manifest-selected root for cases that expect a head, while preserving the
existing receipt and retry assertions.
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CHANGELOG.mdREADME.mddocs/formats/segment-store-v2/README.mddocs/formats/segment-store-v2/recovery.mddocs/formats/segment-store-v2/requirements.mdsrc/adapters/filesystem_version_two_admission.rssrc/adapters/retention.rssrc/adapters/retention/filesystem_retention_snapshot.rssrc/adapters/retention/filesystem_retention_snapshot_error.rssrc/adapters/retention/filesystem_retention_snapshot_tests.rssrc/adapters/retention/reader_attempt_limit.rssrc/adapters/retention/reader_fence.rssrc/adapters/retention/retention_view_collector.rssrc/adapters/retention/retention_view_collector_tests.rssrc/adapters/store_migration/filesystem_migration_authority.rssrc/lib.rsxtask/src/durability_crash_matrix/production_protocol.rsxtask/src/durability_crash_matrix/production_protocol/fixture.rsxtask/src/durability_crash_matrix/production_protocol/initialization.rsxtask/src/durability_crash_matrix/production_protocol/retention.rsxtask/src/durability_crash_matrix/production_protocol/retention_storage.rsxtask/src/durability_crash_matrix/restart.rsxtask/src/durability_crash_matrix/restart/expectation.rsxtask/src/durability_crash_matrix/restart/retention.rsxtask/src/durability_crash_point.rsxtask/src/durability_crash_point_identity.rsxtask/tests/durability_crash_point_contract.rs
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📓 Path-based instructions (2)
Test names describe laws, not functions.
📄 CodeRabbit inference engine (AGENTS.md)
Files:
src/adapters/retention/retention_view_collector_tests.rssrc/adapters/retention/filesystem_retention_snapshot_tests.rs
This is a pure Rust project.
📄 CodeRabbit inference engine (AGENTS.md)
Files:
src/adapters/retention/retention_view_collector_tests.rsxtask/tests/durability_crash_point_contract.rsxtask/src/durability_crash_point_identity.rsxtask/src/durability_crash_matrix/production_protocol/initialization.rssrc/lib.rssrc/adapters/retention/reader_attempt_limit.rssrc/adapters/filesystem_version_two_admission.rsxtask/src/durability_crash_matrix/restart/expectation.rssrc/adapters/retention/filesystem_retention_snapshot_tests.rssrc/adapters/retention/filesystem_retention_snapshot.rssrc/adapters/retention.rsxtask/src/durability_crash_point.rsxtask/src/durability_crash_matrix/restart/retention.rssrc/adapters/retention/filesystem_retention_snapshot_error.rsxtask/src/durability_crash_matrix/production_protocol.rssrc/adapters/retention/retention_view_collector.rsxtask/src/durability_crash_matrix/production_protocol/retention_storage.rsxtask/src/durability_crash_matrix/production_protocol/fixture.rssrc/adapters/retention/reader_fence.rsxtask/src/durability_crash_matrix/restart.rssrc/adapters/store_migration/filesystem_migration_authority.rsxtask/src/durability_crash_matrix/production_protocol/retention.rs
🧠 Learnings (1)
📚 Learning: 2026-07-27T22:37:16.896Z
Learnt from: flyingrobots
Repo: flyingrobots/keep PR: 49
File: src/layout/record_length.rs:29-29
Timestamp: 2026-07-27T22:37:16.896Z
Learning: This repository targets Rust 1.96 (per `Cargo.toml` `rust-version` and `rust-toolchain.toml`). When writing or reviewing Rust code, only use APIs/language features stabilized in Rust 1.96 or earlier. Avoid using newer std/library APIs that wouldn’t be available on Rust 1.96 (e.g., you may rely on `u64::is_multiple_of` since it’s stabilized by 1.96).
Applied to files:
xtask/src/durability_crash_matrix/restart/retention.rssrc/adapters/retention/filesystem_retention_snapshot_error.rsxtask/src/durability_crash_matrix/production_protocol/retention_storage.rs
🪛 LanguageTool
docs/formats/segment-store-v2/requirements.md
[uncategorized] ~19-~19: If this is a compound adjective that modifies the following noun, use a hyphen.
Context: ...e fence and verifies each selected root on demand while the fence is held, refusing a sub...
(EN_COMPOUND_ADJECTIVE_INTERNAL)
🔇 Additional comments (30)
docs/formats/segment-store-v2/requirements.md (2)
18-18: State the sampled successor coverage.“Successor prefixes recover” still reads as exhaustive coverage. State that the evidence covers four representative successor prefixes.
19-19: LGTM!README.md (2)
85-85: Remove retention publication from this gap row.Retention-publication restart recovery is documented as proven above. Keep only the remaining migration recovery gap, or split the row.
54-57: LGTM!Also applies to: 78-81
xtask/src/durability_crash_matrix/production_protocol.rs (1)
11-12: LGTM!Also applies to: 46-48
xtask/src/durability_crash_matrix/production_protocol/fixture.rs (1)
14-27: LGTM!Also applies to: 48-66
xtask/src/durability_crash_matrix/production_protocol/initialization.rs (1)
28-44: LGTM!xtask/src/durability_crash_matrix/production_protocol/retention.rs (1)
1-114: LGTM!xtask/src/durability_crash_matrix/production_protocol/retention_storage.rs (1)
1-229: LGTM!CHANGELOG.md (1)
13-19: LGTM!Also applies to: 42-49
xtask/src/durability_crash_matrix/restart.rs (1)
4-4: LGTM!Also applies to: 21-23
xtask/src/durability_crash_matrix/restart/expectation.rs (1)
67-71: LGTM!xtask/src/durability_crash_matrix/restart/retention.rs (3)
1-38: LGTM!
129-157: LGTM!
106-113: 🩺 Stability & AvailabilityNo change is needed for atomic
Duringpoints.CrashRetentionStorage::executeruns the operation beforeCrashControl::after. ForDuringTiming::After,CrashControl::afterthen triggers process death. The atomic-point prefix is therefore completed, andphaseis correct.xtask/src/durability_crash_point.rs (1)
16-17: LGTM!Also applies to: 93-126, 131-131, 167-183, 233-249
xtask/src/durability_crash_point_identity.rs (1)
45-61: LGTM!xtask/tests/durability_crash_point_contract.rs (1)
7-7: LGTM!Also applies to: 165-245
src/adapters/retention/reader_attempt_limit.rs (1)
1-25: LGTM!src/adapters/retention/retention_view_collector.rs (1)
94-113: LGTM!src/adapters/retention/retention_view_collector_tests.rs (1)
74-90: LGTM!src/adapters/retention.rs (1)
47-50: LGTM!Also applies to: 105-106, 118-120, 136-137, 168-170
src/adapters/filesystem_version_two_admission.rs (1)
6-6: LGTM!src/adapters/retention/filesystem_retention_snapshot_error.rs (2)
29-33: Downstream note on the unreachableCatalogvariant.This variant is well documented and correctly wired into
source()at Line 60. It is also never constructed. The root cause is insrc/adapters/retention/filesystem_retention_snapshot.rsat Lines 73-74, where theCatalogRestartErroris collapsed into anio::Errorand surfaces asError::View. I raised it there. No separate change is needed in this file until that mapping is fixed.
41-63: LGTM!src/adapters/retention/filesystem_retention_snapshot.rs (2)
179-190: LGTM!Also applies to: 204-213
167-170: 🗄️ Data Integrity & IntegrationKeep the binary search.
RetentionManifeststores entries in strict namespace-digest order because its checked constructor sorts caller input, rejects duplicate namespaces, and exposes the entries only after admission. An unsorted manifest cannot reach this lookup through that contract.src/adapters/retention/filesystem_retention_snapshot_tests.rs (1)
28-38: LGTM!src/adapters/store_migration/filesystem_migration_authority.rs (1)
83-84: 🔒 Security & Privacy | 🛡️ Analyzed with Security ReviewNo change required.
repository-tasksis not a default feature, and thekeepcrate is unpublished. The feature is enabled only by the unpublishedxtaskpackage. The constructor still enforces namespace, record, and root-identity checks.src/adapters/retention/reader_fence.rs (1)
34-34: 🗄️ Data Integrity & IntegrationThe pinned APIs are compatible. On non-Windows targets,
cap_std::fs::FileimplementsAsFd, andrustix1.1.4flock<Fd: AsFd>accepts it.cap-fs-ext4.0.2 definesMetadataExt::dev()andMetadataExt::ino()withu64return types. No change is required.
…odel KEEP-RETENTION-010 asks that model operation sequences agree with a deterministic namespace-to-anchor-set map and that no caller identity, path, clock, or application policy enters the core transition. Five laws now run every three-operation sequence over initial publications of two namespaces, a successor of the first, a byte-identical retry of the last accepted publication, and an initial publication from a stale view: 125 sequences, each in a fresh migrated store, driven through the real filesystem authority. After every step the fenced reader view must equal the model exactly: the manifest's namespace-to-generation map, the liveness generation, and each selected root's generation and anchor set, with a refused operation leaving the view unchanged. The model was corrected three times by the store during development, each time toward the rule the publication page states: a byte-identical retry is already committed only while that exact staged successor, head included, remains current; a stale initial is superseded by any later publication. A source contract walks src/retention and the storage-independent retention adapters and refuses any clock, path, filesystem, environment, or identity token. KEEP-RETENTION-010 is Implemented in the ledger. Refs #19
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Problem: the README gap table sent retention recovery, the reader fence, and migration recovery to #19, which closed on 2026-09-08 under another title; durable reads had no issue at all; the crate doc said filesystem retention execution was absent while FilesystemRetentionPublicationAuthority is exported; migration-inventory.md called verification-first migration storage "in progress" while KEEP-MIGRATION-003 is Implemented; and retention-publication.md described version-2 catalog publication as behaviour when no version-2 catalog publisher exists. Approach: open #108 (partial-prefix migration recovery and KEEP-CRASH-053..073) and #109 (durable authenticated reads, KEEP-RECONSTRUCT-009 and -010) and point the README rows at them and at PR #99; rewrite the crate doc to name what is present and absent; state the migration-inventory verification as implemented; and label version-2 catalog publication as a gap with its consequence: a migrated store admits no catalog publication until the durable write path (#82) lands. Evidence: the documentation contract tests, the version-2 protocol contract, the doctests, markdownlint, and the roadmap link check pass. ROADMAP T-38.1, T-38.2, T-38.3 checked; F-17 and F-23 routed to #108 and #109. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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…the roadmap branch Brings `feature/retention-publication-recovery` (8 commits, CI green) into this branch so the M4 tasks that depend on F-18 recovery, the F-19 `ReaderFence` and `FilesystemRetentionSnapshot`, and the F-20 model evidence can proceed here. Conflict resolution, all mechanical: - `DurabilityCrashPoint` keeps both boundary sets in identifier order (`ALL` is 73 entries, `KEEP-CRASH-001`–`073`); `DurabilityCrashSequence` gains `Retention` beside `Migration`; both `sequence()` arms, both restart dispatch arms, and both production-protocol arms are kept; the point contract table lists 036–052 then 053–073; the canonical matrix is 224 cases (`cargo xtask durability-crash-matrix` passes in under fifteen seconds). - `filesystem_exact_record::open_read` takes PR #99's `pub(super)` visibility beside this branch's `open_regular` and `read_bounded_optional`. - `FilesystemStoreMigrationAuthority::open_unchecked_for_repository_tasks` takes PR #99's definition; this branch's duplicate is removed. - README, CHANGELOG, and the v2 README carry both sets of claims; the gap table drops the rows both branches closed. - `retention_store_v2_protocol_contract` no longer requires a "Planned in #19" ledger row, since none remains. ROADMAP: T-18.1, T-18.2, T-19.1, T-20.1 checked; F-19 and F-20 Done on this branch; F-18 Partial pending T-18.3 and orphan disposition. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This was referenced Oct 1, 2026
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Code Lawyer: independently reproduced the short-stage evidence-deletion finding at exact PR head c9277ea. This PR is not merge-ready.
RED ran in an isolated Docker clone of the exact head, using a dedicated target directory. cargo test --test retention_short_stage_probe compiled successfully and executed one public API regression. It failed with the intended assertion: "noncanonical short root bytes authorized evidence deletion". This is not a setup failure. The probe changes only the isolated validation clone; no production fix, GREEN, release validation or permanent committed regression is claimed yet. Discovery retrieved all 37 review threads; the outer connection and every nested comment connection report hasNextPage=false. Existing feedback is being deduplicated and verified, not assumed correct. Independent agy ULTRA STRICT review is running against this exact head. Live GitHub also reports CONFLICTING against current main; older green CI does not establish main integration. No thread has been resolved and no merge is authorized until the source fixes, integration, independent approval and current-head checks pass. Cc @codex. |
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Code Lawyer: independently reproduced the direct-recovery directory-replacement finding at exact head c9277ea.
RED: the isolated Docker clone compiled and executed one unit regression, direct_recovery_never_mutates_a_replaced_protocol_directory. It failed at the intended refusal assertion: "direct recovery mutated an unreachable replaced directory". This is not a setup failure. The regression uses actual rename/create operations without sleeps or forged admission flags. Existing fixture setup uses the repository's unchecked test admission; this law checks post-admission capability binding and does not claim production platform admission. The relevant existing thread is PRRT_kwDOTdinZc6g09qo. Its concern remains unresolved. The independent review is still running; remediation and permanent regressions will follow the complete feedback. No GREEN or merge readiness is claimed. Cc @codex. |
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Independent Adversarial Code Review: PR #99 (
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| Item | Traced Coordinates / Evidence Coordinates | Status | Result / Findings |
|---|---|---|---|
| Path 1: Publication Recovery Verification | filesystem_retention_storage.rs:26-91 → filesystem_retention_recovery.rs:127-143 |
Inspected | Defect: Mutates before namespace admission; unwraps Observe error to raw io::Error. |
| Path 2: Public Authority Recovery Entrypoint | filesystem_retention_recovery.rs:127-143 |
Inspected | Defect: Never calls require_pinned_directories or filesystem_retention_namespace::admit. |
| Path 3: Stage Assessment & Truncation Decoders | recovery_stage_assessment.rs:52-92 → root_header_decoder.rs:36 / manifest_header_decoder.rs:21 |
Inspected | Defect: Sub-header length non-canonical bytes classified as Truncated and deleted. |
| Path 4: Stage Hardlink Observation | filesystem_retention_recovery_observation.rs:147-154 → filesystem_retention_stage.rs:73-78 |
Inspected | Defect: Ignores EntryIdentity in pool_entry; byte-identical replacement causes mid-execution failure after HEAD commit. |
| Path 5: Stage Fsync Protocol | filesystem_retention_recovery.rs:225 → filesystem_retention_stage.rs:45-55 |
Inspected | Defect: Reopened stage never calls sync_all; only directory synchronized before publication. |
| Path 6: Reader Snapshot Load | filesystem_retention_snapshot.rs:91-127 → filesystem_retention_snapshot.rs:73 |
Inspected | Defect: Re-resolves store_root by path; ignores _bound identity; Error::Catalog unreachable. |
| Path 7: Head Finalization Cross-Check | recovery_planner.rs:124-141 → filesystem_retention_current.rs:107-124 |
Inspected | Defect: Does not validate manifest_length or predecessor against staged manifest. |
| Path 8: Successor Manifest Cross-Check | recovery_planner.rs:177-185 → successor_manifest.rs:9-47 |
Inspected | Defect: Does not verify preservation of unrelated namespace entries. |
| Path 9: Store Reopening Admission | filesystem_version_two_admission.rs:51-158 |
Inspected | Defect: Checks Mount identity coordinate, reverting PR #137 fix. |
| Audit: Merge Base & Tree Conflicts | Base: f49cff73, PR Head: c9277ead, Target Main: 82374a9 |
Inspected | 10 Merge Conflicts; positional crash index arithmetic broken by PR #138. |
| Constant: Manifest Max Length | filesystem_retention_recovery_observation.rs:20 (295_136) |
Inspected | Matches manifest_length.rs:9 (MAXIMUM_VALUE). Local duplication. |
| Constant: Reader Attempt Limit | reader_attempt_limit.rs:13 (DEFAULT = 3) |
Inspected | Matches design; unproven under contention benchmarks. |
| Numbers: Crash Coordinates | README.md:52 (156 coordinates, KEEP-CRASH-001..052) |
Inspected | 52 * 3 = 156. Stale once main's 053..073 land. |
| Numbers: Successor Prefixes | requirements.md:18 ("successor prefixes recover") |
Inspected | Discrepancy: Claims exhaustive coverage, but only 4 counts [2, 9, 13, 15] are tested in prefix_tests.rs:178. |
| Numbers: Documentation Gaps | docs/formats/segment-store-v2/README.md:103 ("the first four") |
Inspected | Stale: Text updated to list 2 items; count "first four" uncorrected. |
Execution and Environment Disclosure
- Checks Executed: Static code inspection, AST verification, and git tree/diff/merge-tree simulation.
- Checks Inspected Only: All Rust source files in
src/adapters/retention/,xtask/src/durability_crash_matrix/,tests/, and documentation files. - Checks Skipped / Unavailable: Native host test execution and Docker container test execution were not executed per instructions and repository container restrictions.
- Execution Gap Notice: Static inspection cannot replace real container crash matrix validation, physical power-loss injection, or concurrency stress under file-system racing. Green CI on PR head
c9277eadoes not establish absence of regressions against targetmain(82374a9).
Final Verdict
REQUEST CHANGES
PR #99 cannot be approved in its current state. The branch must be rebased onto main (82374a9), resolving the 10 merge conflicts, fixing the pre-magic truncation assessment, eliminating the reverted Mount check, ensuring recovered stage fsync durability, preserving the Error::Catalog error boundary, and addressing all P0–P2 findings detailed above before independent verification can be satisfied.
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Primary reconciliation of the full independent agy feedback, before remediation:
No review thread is resolved, no finding is silently discarded and no acceptance criterion is waived. Cc @codex. |
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Code Lawyer activity: partial layout-length bounds.
Receipt: The g09p5 finding remains open for partial-anchor ordering, future-entry feasibility and partial header constraints. Incomplete-stage pinning and post-removal failure semantics remain separate blockers. Current-head hosted CI and a fresh independent agy review remain required. MERGE GATE: LOCKED. |
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Code Lawyer activity: partial-anchor ordering feasibility.
Receipt: The g09p5 finding remains open for future-entry feasibility and partial header constraints. Incomplete-stage pinning and post-removal failure semantics remain separate blockers. Current-head hosted CI and a fresh independent agy review remain required. MERGE GATE: LOCKED. |
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Code Lawyer Activity SummaryChange kind: bug fix. This is another partial correction for the open P1 prefix-admission finding
The regression was observed RED when an initial root with a nonzero partial predecessor returned clean recovery after discarding the stage. The fix checks available predecessor bytes only for initial generations and preserves complete-field semantic diagnostics. Passed in copied Docker source: focused history laws and canonical-prefix controls in debug and release; retention process-death matrix; workspace/all-target Clippy with all features and without default features, both with Four inspected product mutations fail their intended checks: wrong diagnostic byte, wrong stage, deletion on refusal and erroneous rejection of valid successor prefixes. An initial diagnostic mutation command changed no formatted source; that invalid calibration was excluded and corrected in a fresh build target. Receipt: |
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Bounded landing: one verified source-binding defect within the maintainer's finite capability scope.
This closes the already-required observation-to-pre-effect source binding, not a new repository-wide audit. @codex |
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Bounded landing candidate: 29067f7. Local and pushed heads match; original unpushed work is preserved in history.
An earlier shared Cargo target reused a mutation binary; that run is explicitly excluded. The dedicated clean-target run is the acceptance evidence. Neither injected EIO nor process death is physical power-loss proof. Complete closure ledger and capability inventory. No merge will occur without the retained human approval requirement. |
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Exact-head landing acceptanceCandidate: 29067f7, both local and pushed. Worktree clean; GitHub verifies the commit signature.
Remaining blocker: obtain the required complete independent review on the unchanged exact head after agy quota becomes available. The smallest next action is to rerun the prepared read-only review prompt at supported effort; assess only approved-contract violations, then record its checklist/verdict. No additional implementation or speculative hardening is underway. Not READY FOR MERGE. Human merge approval remains required after independent acceptance. No merge was attempted. |
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@coderabbitai review |
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Code Lawyer — primary review of 29067f7Reviewed exact head 29067f7 against main 379b241, under the maintainer's bounded decisions A/B/C. Latest maintainer instruction authorizes Code Lawyer plus a separate Codex review as the replacement for unavailable agy/CodeRabbit review, and authorizes merge if satisfactory. This does not bypass repository protections or manufacture an external bot approval. Primary verdict: APPROVE under the approved landing scope. No blocking correctness finding. No source changes or additional speculative hardening were introduced during this review. Independent Codex verdict is recorded separately before merge. Verification checklist
Queue and validationRefreshed paginated inventory: 40 threads, 76 review records, 140 top-level comments. All thread and nested comment pages were exhausted. No unresolved inline threads or new substantive external findings remain. Original global/inline obligations and duplicates map to the landing ledger; resolution flags were not used as correctness evidence. The old formal CodeRabbit change requests concern now-addressed findings, not an approval of the current head. Inspected existing RED/GREEN logs, distinct-assertion calibration and dedicated-clean-target validation. The shared-target mutant-binary run and an initial compiler-failing mutant remain excluded. No redundant broad campaign was rerun during this read-only review. Exact-head hosted run 37047326095 is successful: Rust quality (including debug/release, both crash campaigns, conformance, fmt/Clippy/MSRV/docs), documentation/workflow integrity, runtime fuzz smoke, and dependency policy/audits. Local ARM documentation-tool absence was covered by the successful hosted documentation gate. CodeRabbit's green status is not approval; its requested review was skipped due file limits. Nonblocking scope note: reader selected-root The final merge gate additionally requires the independent Codex exact-head checklist/verdict, live unchanged head/base, green checks, and repository merge rules. Maintainer merge authorization is already explicit. |
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Independent Codex review completed for 29067f7, against main 379b241. No verified actionable finding against the approved A/B/C landing contract. This approval comes from independent source and evidence review; green CI alone does not supply it. Verification Checklist Paths below are relative to the repository; retention filenames are under
Merge integration reviewed against both parents
Review obligations and evidence
Constants and numeric claims
Execution and limitations I executed read-only Git/source/evidence inspection, I independently verified run 37047326095 is successful for the exact reviewed SHA, with all four required jobs successful. CodeRabbit’s “pass” is a skipped review because of its file limit; agy supplied no approval. Coverage remains bounded: injected pre-sync EIO and process death do not establish physical power-loss behavior; unsupported arbitrary concurrent pathname mutation is not isolated by the writer lock; automatic incomplete-stage disposition remains deferred to #155. The reader’s separate exact-record stringification at The worktree remained clean and HEAD unchanged throughout this review. APPROVE |
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Problem and delivered behavior
Retention publication needs restart classification of fixed stages, coherent reader views, and model-backed transition checks. This PR supplies recovery planning/execution, publication-triggered recovery, immutable reader fencing and namespace-transition model coverage.
The approved landing deliberately preserves incomplete stages. Direct recovery and publication-triggered recovery return a precise existing corruption refusal or typed
IncompleteStageRequiresDispositionbefore any recovery mutation, including changes to complete earlier stages. Complete root/manifest stages still become protected pool evidence; complete head recovery and already-committed cleanup remain supported.Approved scope and invariants
Complete-stage cleanup verifies both source and pool evidence, retains the opened source through the operation, and preserves the observed identity across reopening. Its preservation guarantee concerns verified surviving pool evidence; successful cleanup intentionally removes the stage pathname.
Approach and alternatives
The pure planner rejects incomplete evidence before building an executable plan; reserved lower-level filesystem discard capabilities also refuse. Shared stage operations retain source identity and annotate errors at effect boundaries. The executor exposes progress without stringifying the original cause.
Rejected alternatives: continuing automatic deletion based on partial feasibility checks, adding a quarantine namespace/journal/format, treating failed sync as rollback, or claiming isolation against raw namespace mutation. The accepted availability cost keeps this landing bounded and preserves evidence for future explicit disposition.
Validation and review
The single closure ledger is docs/testing-evidence/retention-landing.md; the normative contract is retention-recovery.md, with the accepted decision. The ledger reconciles inline threads, review bodies, top-level discussion, duplicates and approved deferrals.
Bug regressions reproduce source substitution and missing post-unlink effect reporting on unfixed code. Incomplete-stage expectation changes are explicitly classified as the approved behavior change. Focused runtime laws cover direct/publication refusal and retained evidence, corruption diagnostics, the maximum-namespace/future-entry counterexample, complete-stage success, pre-effect substitution, real namespace effects followed by injected sync failures, and fresh-authority restart. Port-level uncertain-effect simulation is distinguished from filesystem execution. Process-death and syscall-order evidence do not claim physical power-loss proof.
All required hosted checks are green on
29067f7d20f078553a0e40a1f2f237a60ade5781: Rust quality, documentation/workflow integrity, runtime fuzz smoke and dependency policy/audits. agy returned no review because of HTTP 429 quota exhaustion; CodeRabbit skipped the requested review because of its file limit. The maintainer explicitly authorized a separate Codex instance using the same adversarial prompt and authorized merge if satisfactory. Both the primary Code Lawyer audit and independent Codex review APPROVE this exact head against the approved A/B/C contract, with complete verification checklists in the PR discussion. No repository protection is bypassed; neither unavailable provider is represented as approving.Compatibility, recovery and security
No on-disk format changes or new dependencies. Public error reporting adds typed incomplete disposition and failing-capability progress; the old incomplete-stage cleanup success behavior intentionally changes. Existing precise corruption causes remain distinguishable. Managed-namespace identity and no-follow protections remain enforced.
No performance optimization or benchmark improvement is claimed. Recovery still uses the documented bounded catalog/segment admission policy; complete-stage verification performs blocking filesystem I/O.
Complete-orphan disposition/collection remains outside this PR (#21). Catalog publisher admission is separately tracked in #150. Migration changes merged from main retain their own recovery contract; retention decision A does not change migration-stage disposal.
Refs #19 #21 #78. Follow-up #155.