knowledgelearningoffset.dbss
Binary layout, byte coverage, field semantics, and validation evidence for the intrinsic BSD knowledgelearningoffset decoder.
Investigation status
| Status | Value |
|---|---|
| Coverage | 100% |
| Iteration | BSD migration |
| Review state | BSD migration reconciled |
| Last reviewed | 2026-08-03 |
| Captures examined | Steam capture ads_version 856; PAZ 5152; file hash 1208798355; 55,332 extracted bytes; normalized SHA-256 86bc7419bdc9c4e696570f44058225d45709135dea16016bd78b2b7b56012dad |
| Decoder | packages/scraper/src/tables/knowledgelearningoffset.dbss.ts |
| Remaining blockers | None |
See Decoder methodology for the confidence scale and evidence rules.
Field ledger
| Field/path | Offset and width | Representation | Claimed meaning | Physical confidence | Representation confidence | Semantic confidence | Evidence | Status |
|---|---|---|---|---|---|---|---|---|
| section framing and row counts | four padded bytes plus two u32 counts |
framing bytes and counts consumed; omitted from output | two namespace directories | Certain | Certain | Certain (structural) | Intrinsic array framing and exact EOF | Closed |
sourceId |
row +0, u32 |
retained | companion source key | Certain | Certain | Certain | Key sets exactly equal both companion sections in two builds | Closed |
offset, byteLength |
row +4, two u32 |
retained | companion payload span | Certain | Certain | Certain | Legacy comparison and complete span coverage | Closed |
| Reserved ranges | schema-local fixed widths | consumed with .pad() and omitted |
framing or semantically neutral capacity | Certain | Certain | Neutral | Adjacent fields, strict EOF, and exact snapshot parity establish each width | Closed neutral |
Active assumptions
Findings
| ID | Finding | Evidence | Schema/documentation impact | Status |
|---|---|---|---|---|
| F-01 | The intrinsic decoder reproduces the transformed reference output exactly. | Full snapshot comparison; complete payload; normalized SHA-256 86bc7419bdc9c4e696570f44058225d45709135dea16016bd78b2b7b56012dad |
The BSD schema is the production source of truth. | Closed |
| F-02 | Row and section boundaries are intrinsic. | Strict decoding reaches exact EOF on the installed capture. | No companion offset table is loaded by this decoder. | Closed |
| F-03 | Reserved byte ranges are representation details. | Their widths are fixed by adjacent fields and full-snapshot parity. | .pad() keeps the schema readable and omits redundant output properties. |
Closed |
Reconciled source findings
| ID | Finding | Evidence | Schema/documentation impact | Status |
|---|---|---|---|---|
| F-02 | Both directory key sets exactly cover their companion sections. | Exhaustive two-build comparison. | Aggregate equality test added. | Closed |