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docs: karpathy-pattern wiki built from the spec, plan, design contract and decisions ledger

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kb/ is its own wiki root: 34 pages across 7 categories, index.md catalog, log.md, AGENTS.md schema layer, and raw/ holding copies of README, the spec, the 13-task plan, the design master and the SDD ledger.

Every page cross-references 3 to 6 others and all 107 wikilinks resolve except two [["list"]] artefacts inside JSON snippets in the copied plan.

Kept separate from the repository root on purpose: its generated graph lands in kb/.ua/ instead of overwriting the code graph.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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ahmed mohammed
2026-09-22 12:14:05 +03:00
co-authored by Claude Opus 4.7
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commit 8b42a0931c
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kb/Lazy database open.md
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# Lazy database open
Opening SQLite at module import time broke `npm run build` with "database is locked": Next collects page data in
parallel workers, each importing the module and running DDL at once.
The fix is a bound Proxy. Nothing opens until a property is first touched; then `DatabaseSync` is constructed,
`journal_mode = WAL` and `busy_timeout = 5000` are set, and the schema DDL runs once. The Proxy methods are bound to
the real instance — an unbound Proxy made every call fail with "TypeError: Illegal invocation".
A second trap: SQLite rows arrive as null-prototype objects, which Next refuses to serialize from a server
component to a client component. Rows are normalised on read.
Related: [[SQLite schema]], [[Running locally]].