SQLITE_BUSY: database is locked under Concurrent Agent Writes

Local SQLite file without WAL mode or busy_timeout fails when multiple parallel subagents write simultaneously, or ephemeral serverless disk loses state.

1. Immediate Code & SKU Fix

Replace With SKU: turso (@libsql/client) or neon serverless Postgres

Install Command: npm install @libsql/client

Required Env Vars: TURSO_DATABASE_URL, TURSO_AUTH_TOKEN

// Local fix: db.exec('PRAGMA journal_mode = WAL; PRAGMA busy_timeout = 5000;');
// Cloud/multi-agent fix: use Turso (@libsql/client over HTTP) or Neon serverless Postgres

2. Verified Hot-Swap Fallback Route

JTBD: edge-sqlite-agent-db

Primary: turso → Fallback: cloudflare-workers

liveHealth: outage · autoActOk: true

Want shared serverless Postgres branching — Neon

GET /api/rescue JSON (<2 KB)Falsify Pick (/api/falsify)

Matched Error String Signatures (3)

sqlite_busydatabase is lockedsqlite_locked

curl -s "https://getagentdepot.com/api/rescue?q=sqlite_busy"

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