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feat: data-parity skill — TypeScript orchestrator, ClickHouse driver, partition support #493

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6d365ad
feat: add data-parity cross-database table comparison
suryaiyer95 Mar 27, 2026
44d7668
feat: add partition support to data_diff
suryaiyer95 Mar 27, 2026
e177f2d
feat: add categorical partition mode (string, enum, boolean)
suryaiyer95 Mar 27, 2026
d1cc932
fix: correct outcome shape handling in extractStats and formatOutcome
suryaiyer95 Mar 27, 2026
149066b
feat: rewrite data-parity skill with interactive, plan-first workflow
suryaiyer95 Mar 27, 2026
3caab30
fix: auto-discover extra_columns and exclude audit/timestamp columns …
aidtya Mar 28, 2026
550d431
fix: add `noLimit` option to driver `execute()` to prevent silent res…
aidtya Mar 28, 2026
f478bff
feat: detect auto-timestamp defaults from database catalog and confir…
aidtya Mar 28, 2026
b408017
fix: address code review findings in data-diff orchestrator
suryaiyer95 Mar 30, 2026
f2cee71
fix: address code review security and correctness findings
suryaiyer95 Mar 31, 2026
982316e
fix: resolve simulation suite failures — object stringification, erro…
suryaiyer95 Mar 31, 2026
05b6a02
refactor: remove existing-tool improvements — scope to data-diff only
suryaiyer95 Apr 1, 2026
6c60be1
refactor: revert .gitignore changes — scope to data-diff only
suryaiyer95 Apr 1, 2026
2c58580
fix: silence @clickhouse/client internal stderr logger to prevent TUI…
suryaiyer95 Apr 2, 2026
19c2376
fix: SQL injection hardening, target partition discovery, and local p…
suryaiyer95 Apr 2, 2026
7402408
feat: add Step 9 result presentation guidelines to data-parity skill
suryaiyer95 Apr 3, 2026
2caf381
fix: use correct outcome format for empty/fallback partition results
suryaiyer95 Apr 3, 2026
1bc67ef
chore: remove pack-local.ts — dev-only utility, not part of the feature
suryaiyer95 Apr 3, 2026
e41e5a0
feat: add data-parity skill to builder prompt with table and SQL quer…
suryaiyer95 Apr 3, 2026
b8147c9
fix: address code review findings — Oracle TRUNC, dialect-aware quoti…
suryaiyer95 Apr 3, 2026
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411 changes: 411 additions & 0 deletions .opencode/skills/data-parity/SKILL.md
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8 changes: 4 additions & 4 deletions packages/drivers/src/bigquery.ts
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Expand Up @@ -2,7 +2,7 @@
* BigQuery driver using the `@google-cloud/bigquery` package.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let BigQueryModule: any
Expand Down Expand Up @@ -37,8 +37,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
client = new BigQuery(options)
},

async execute(sql: string, limit?: number, binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, binds?: any[], execOptions?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = execOptions?.noLimit ? 0 : (limit ?? 1000)
const query = sql.replace(/;\s*$/, "")
const isSelectLike = /^\s*(SELECT|WITH|VALUES)\b/i.test(sql)

Expand All @@ -58,7 +58,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {

const [rows] = await client.query(options)
const columns = rows.length > 0 ? Object.keys(rows[0]) : []
const truncated = rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && rows.length > effectiveLimit
const limitedRows = truncated ? rows.slice(0, effectiveLimit) : rows

return {
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9 changes: 6 additions & 3 deletions packages/drivers/src/clickhouse.ts
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Expand Up @@ -5,7 +5,7 @@
* Uses the official ClickHouse JS client which communicates over HTTP(S).
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let createClient: any
Expand Down Expand Up @@ -57,14 +57,17 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
clientConfig.clickhouse_settings = config.clickhouse_settings
}

// Silence the client's internal stderr logger — its ERROR-level output
// writes raw lines directly to stderr and corrupts terminal TUI rendering.
clientConfig.log = { level: 127 } // ClickHouseLogLevel.OFF = 127
client = createClient(clientConfig)
Comment on lines +60 to 63
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@coderabbitai coderabbitai bot Apr 3, 2026 •
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⚠️ Potential issue | 🟡 Minor

🧩 Analysis chain

🌐 Web query:

What are the log level constants in @clickhouse/client npm package? What value is ClickHouseLogLevel.OFF?

💡 Result:

The log level constants in the @clickhouse/client npm package are part of the ClickHouseLogLevel enum. The allowed values are: OFF, TRACE, DEBUG, INFO, WARN, ERROR. ClickHouseLogLevel.OFF disables logging (previously the default, now WARN is default in recent versions). These are configured in the client options as log: { level: ClickHouseLogLevel.WARN }. Default logger emits to stdout/stderr via console methods. Custom LoggerClass can be provided.

Citations:

Replace magic number with ClickHouseLogLevel.OFF constant.

The code uses hardcoded 127, but @clickhouse/client exports ClickHouseLogLevel.OFF as a named constant. Replace the magic number to improve maintainability:

import { createClient, type ExecuteOptions, ClickHouseLogLevel } from '@clickhouse/client'
// ...
clientConfig.log = { level: ClickHouseLogLevel.OFF }
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@packages/drivers/src/clickhouse.ts` around lines 60 - 63, Replace the magic
number 127 with the exported enum constant by importing ClickHouseLogLevel from
'@clickhouse/client' and setting clientConfig.log = { level:
ClickHouseLogLevel.OFF }; update the import list that currently includes
createClient and ExecuteOptions to also import ClickHouseLogLevel so the
createClient(clientConfig) call uses the named constant instead of 127.

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@suryaiyer95 suryaiyer95 Apr 3, 2026

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Acknowledged — cosmetic improvement. We used the numeric value to avoid importing from @clickhouse/client (the driver dynamically imports it). The numeric constant is correct and documented in the comment. Will leave as-is for now since the dynamic import makes a static import of the enum awkward.

},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
if (!client) {
throw new Error("ClickHouse client not connected — call connect() first")
}
const effectiveLimit = limit === undefined ? 1000 : limit
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
let query = sql

// Strip string literals, then comments, for accurate SQL heuristic checks.
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/databricks.ts
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Expand Up @@ -2,7 +2,7 @@
* Databricks driver using the `@databricks/sql` package.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let databricksModule: any
Expand Down Expand Up @@ -44,8 +44,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
})
},

async execute(sql: string, limit?: number, binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
let query = sql
const isSelectLike = /^\s*(SELECT|WITH|VALUES)\b/i.test(sql)
if (
Expand All @@ -65,7 +65,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
await operation.close()

const columns = rows.length > 0 ? Object.keys(rows[0]) : []
const truncated = rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && rows.length > effectiveLimit
const limitedRows = truncated ? rows.slice(0, effectiveLimit) : rows

return {
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/duckdb.ts
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Expand Up @@ -2,7 +2,7 @@
* DuckDB driver using the `duckdb` package.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let duckdb: any
Expand Down Expand Up @@ -105,8 +105,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
connection = db.connect()
},

async execute(sql: string, limit?: number, binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)

let finalSql = sql
const isSelectLike = /^\s*(SELECT|WITH|VALUES)\b/i.test(sql)
Expand All @@ -123,7 +123,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
: await query(finalSql)
const columns =
rows.length > 0 ? Object.keys(rows[0]) : []
const truncated = rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && rows.length > effectiveLimit
const limitedRows = truncated ? rows.slice(0, effectiveLimit) : rows

return {
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/mysql.ts
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Expand Up @@ -2,7 +2,7 @@
* MySQL driver using the `mysql2` package.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let mysql: any
Expand Down Expand Up @@ -41,8 +41,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
pool = mysql.createPool(poolConfig)
},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
let query = sql
const isSelectLike = /^\s*(SELECT|WITH|VALUES)\b/i.test(sql)
if (
Expand All @@ -56,7 +56,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
const [rows, fields] = await pool.query(query)
const columns = fields?.map((f: any) => f.name) ?? []
const rowsArr = Array.isArray(rows) ? rows : []
const truncated = rowsArr.length > effectiveLimit
const truncated = effectiveLimit > 0 && rowsArr.length > effectiveLimit
const limitedRows = truncated
? rowsArr.slice(0, effectiveLimit)
: rowsArr
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/oracle.ts
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Expand Up @@ -2,7 +2,7 @@
* Oracle driver using the `oracledb` package (thin mode, pure JS).
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let oracledb: any
Expand Down Expand Up @@ -37,8 +37,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
})
},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
let query = sql
const isSelectLike = /^\s*(SELECT|WITH)\b/i.test(sql)

Expand All @@ -61,7 +61,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
const columns =
result.metaData?.map((m: any) => m.name) ??
(rows.length > 0 ? Object.keys(rows[0]) : [])
const truncated = rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && rows.length > effectiveLimit
const limitedRows = truncated
? rows.slice(0, effectiveLimit)
: rows
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/postgres.ts
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Expand Up @@ -2,7 +2,7 @@
* PostgreSQL driver using the `pg` package.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let pg: any
Expand Down Expand Up @@ -46,7 +46,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
pool = new Pool(poolConfig)
},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const client = await pool.connect()
try {
if (config.statement_timeout) {
Expand All @@ -57,7 +57,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
}

let query = sql
const effectiveLimit = limit ?? 1000
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
const isSelectLike = /^\s*(SELECT|WITH|VALUES)\b/i.test(sql)
// Add LIMIT only for SELECT-like queries and if not already present
if (
Expand All @@ -70,7 +70,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {

const result = await client.query(query)
const columns = result.fields?.map((f: any) => f.name) ?? []
const truncated = result.rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && result.rows.length > effectiveLimit
const rows = truncated
? result.rows.slice(0, effectiveLimit)
: result.rows
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/redshift.ts
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Expand Up @@ -3,7 +3,7 @@
* Uses svv_ system views for introspection.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let pg: any
Expand Down Expand Up @@ -46,10 +46,10 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
pool = new Pool(poolConfig)
},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const client = await pool.connect()
try {
const effectiveLimit = limit ?? 1000
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
let query = sql
const isSelectLike = /^\s*(SELECT|WITH|VALUES)\b/i.test(sql)
if (
Expand All @@ -62,7 +62,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {

const result = await client.query(query)
const columns = result.fields?.map((f: any) => f.name) ?? []
const truncated = result.rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && result.rows.length > effectiveLimit
const rows = truncated
? result.rows.slice(0, effectiveLimit)
: result.rows
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/snowflake.ts
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Expand Up @@ -3,7 +3,7 @@
*/

import * as fs from "fs"
import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let snowflake: any
Expand Down Expand Up @@ -232,8 +232,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
})
},

async execute(sql: string, limit?: number, binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)
let query = sql
const isSelectLike = /^\s*(SELECT|WITH|VALUES|SHOW)\b/i.test(sql)
if (
Expand All @@ -245,7 +245,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
}

const result = await executeQuery(query, binds)
const truncated = result.rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && result.rows.length > effectiveLimit
const rows = truncated
? result.rows.slice(0, effectiveLimit)
: result.rows
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/sqlite.ts
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Expand Up @@ -4,7 +4,7 @@
*/

import { Database } from "bun:sqlite"
import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
const dbPath = (config.path as string) ?? ":memory:"
Expand All @@ -22,9 +22,9 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
}
},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
if (!db) throw new Error("SQLite connection not open")
const effectiveLimit = limit ?? 1000
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)

// Determine if this is a SELECT-like statement
const trimmed = sql.trim().toLowerCase()
Expand Down Expand Up @@ -60,7 +60,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
const stmt = db.prepare(query)
const rows = stmt.all() as any[]
const columns = rows.length > 0 ? Object.keys(rows[0]) : []
const truncated = rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && rows.length > effectiveLimit
const limitedRows = truncated ? rows.slice(0, effectiveLimit) : rows

return {
Expand Down
8 changes: 4 additions & 4 deletions packages/drivers/src/sqlserver.ts
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Expand Up @@ -2,7 +2,7 @@
* SQL Server driver using the `mssql` (tedious) package.
*/

import type { ConnectionConfig, Connector, ConnectorResult, SchemaColumn } from "./types"
import type { ConnectionConfig, Connector, ConnectorResult, ExecuteOptions, SchemaColumn } from "./types"

export async function connect(config: ConnectionConfig): Promise<Connector> {
let mssql: any
Expand Down Expand Up @@ -42,8 +42,8 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
pool = await mssql.connect(mssqlConfig)
},

async execute(sql: string, limit?: number, _binds?: any[]): Promise<ConnectorResult> {
const effectiveLimit = limit ?? 1000
async execute(sql: string, limit?: number, _binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult> {
const effectiveLimit = options?.noLimit ? 0 : (limit ?? 1000)

let query = sql
const isSelectLike = /^\s*SELECT\b/i.test(sql)
Expand All @@ -69,7 +69,7 @@ export async function connect(config: ConnectionConfig): Promise<Connector> {
: (result.recordset?.columns
? Object.keys(result.recordset.columns)
: [])
const truncated = rows.length > effectiveLimit
const truncated = effectiveLimit > 0 && rows.length > effectiveLimit
const limitedRows = truncated ? rows.slice(0, effectiveLimit) : rows

return {
Expand Down
8 changes: 7 additions & 1 deletion packages/drivers/src/types.ts
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Expand Up @@ -20,9 +20,15 @@ export interface SchemaColumn {
nullable: boolean
}

export interface ExecuteOptions {
/** Skip the default LIMIT injection and post-truncation. Use when the caller
* needs the complete, untruncated result set (e.g. data-diff pipelines). */
noLimit?: boolean
}

export interface Connector {
connect(): Promise<void>
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Copilot AI Apr 3, 2026

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Connector.execute() now accepts a 4th options?: ExecuteOptions param, but at least one connector implementation (MongoDB driver) still uses the old 3-arg signature. This will fail TypeScript structural typing for Promise<Connector> and break builds.

Update packages/drivers/src/mongodb.ts to accept (sql, limit?, binds?, options?) (it can ignore options), or make the Connector interface backwards-compatible via a rest/overload.

Suggested change
connect(): Promise<void>
connect(): Promise<void>
execute(sql: string, limit?: number, binds?: any[]): Promise<ConnectorResult>

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@suryaiyer95 suryaiyer95 Apr 3, 2026

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Not applicable — TypeScript Connector interface uses options?: ExecuteOptions which is optional. MongoDB's 3-arg signature is structurally compatible since the 4th param is optional (?). TypeScript does not require implementations to declare optional trailing params they don't use. Verified: bun run script/build.ts compiles successfully.

execute(sql: string, limit?: number, binds?: any[]): Promise<ConnectorResult>
execute(sql: string, limit?: number, binds?: any[], options?: ExecuteOptions): Promise<ConnectorResult>
listSchemas(): Promise<string[]>
listTables(schema: string): Promise<Array<{ name: string; type: string }>>
describeTable(schema: string, table: string): Promise<SchemaColumn[]>
Expand Down
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