itemimprovementoffset.dbss
Physical layout, representation confidence, semantic evidence, and exact BSD snapshot parity for the item-improvement pointer directory.
Investigation status
| Status | Value |
|---|---|
| Coverage | 100% |
| Iteration | 2 |
| Review state | BSD migration reconciled |
| Last reviewed | 2026-07-31 |
| Captures examined | Build 2938; pad00000.meta SHA-256 b7eefe6059818f84c0545f10020fe93bd3bd5d0647e043120caf78726ccafe8f; archive entry hash 2971076656; 46,756-byte primary SHA-256 ed179c694def719e25f779a9dd0df1bdad12fe73678daec22930c576d8a8bdcf; 3,896 rows; normalized SHA-256 4b66a173b55827f3ff99d77f72954957a04e9d5f62f6700b043d19cba4ca5114 |
| Decoder | packages/scraper/src/tables/itemimprovementoffset.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 |
|---|---|---|---|---|---|---|---|---|
| Table row count | file +0, 4 |
u32 count consumed by array; rows retained in directory order |
pointer-row framing | Certain | Certain | Certain | Count 3,896 and fixed 12-byte rows close byte 46,756 | Closed |
rows[].improvementResultId |
row +0, 4 |
positive u32 retained |
pointed result-group identifier | Certain | Certain | High | Exhaustively matches the key immediately before each payload | Closed |
rows[].offset |
row +4, 4 |
u32 retained |
absolute payload start after the outer key | Certain | Certain | Certain | Every value equals the physical row start plus four | Closed |
rows[].byteLength |
row +8, 4 |
u32 retained |
payload width excluding outer key | Certain | Certain | Certain | Values are 25 or 41 and equal 21 + resultItemCount × 4 |
Closed |
Active assumptions
Findings
| ID | Finding | Evidence | Schema/documentation impact | Status |
|---|---|---|---|---|
| IIRO-01 | Directory spans exclude exactly the four-byte outer result-group key. | All 3,896 sorted spans align with the corresponding primary row and close byte 173,916. | Pointer semantics remain explicit, but the payload decoder does not depend on this table. | Closed |
| IIRO-02 | The migrated BSD output is exactly reference-equivalent. | Full directory-order comparison matched 3,896 rows with digest 4b66a173b55827f3ff99d77f72954957a04e9d5f62f6700b043d19cba4ca5114. |
Physical and representation confidence are Certain. | Closed |
| IIRO-03 | The checked-in 3,823-row legacy JSON predates build 2938. | The unchanged reference schema decodes 3,896 current rows from the hashed primary. | Current-byte reference output is the parity oracle. | Closed |