integrations(agents): align to the cross-language agent-tool contract#66
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chdb-node's agent tools predated chdb's cross-language agent-tool contract
(chdb-io/chdb chdb/agents/CONTRACT.md) and only implemented a 3-method
subset with different names, no param binding, and no shared error/64-bit/
resource semantics. This ports the contract's base faithfully so the TS
binding is contract-conformant and the Python/TS surfaces stay in lock-step.
Base (integrations/agents/, mirrors chdb.agents):
- tool.mjs: ChDBTool with the full canonical method set — run_select_query,
list_databases, list_tables, describe_table, get_sample_data,
list_functions, attach_file — plus toolSpecs()/call().
- P1 read-only via SET readonly=2 (immutable, opt out with readOnly:false);
P2 values bound as {name:Type} params, identifiers via quoteIdent; P3
maxRows + maxBytes with a truncated flag; P4 call() returns the
{ok,result}|{ok,error} envelope and query() rejects with typed errors.
- errors.mjs: parseError with the same regex + code map as the reference
(164->READONLY, 62->SYNTAX, 46/47/60/81/115->UNKNOWN_*).
- safety.mjs: quoteIdent/quoteString/pathAllowed/scanFilePaths.
- 64-bit ints returned exact (output_format_json_quote_64bit_integers=1);
P5 max_execution_time / file_allowlist / attachments+attach_file.
- The Python-only dataframe_query is intentionally omitted (language-specific,
outside the cross-language base).
Framework adapters are now thin shims over the base:
- ai-sdk.mjs and mastra.mjs build the same canonical tool set from a shared
descriptor list and delegate every call to ChDBTool.call(), so both
frameworks expose identical behavior. Removed chdb-tool-core.mjs.
- New framework-agnostic entry point: import { ChDBTool } from 'chdb/agents'.
Contract + conformance vendored:
- integrations/agents/CONTRACT.md and conformance/{cases.jsonl,fixtures,README}
are synced mirrors of the canonical files in chdb-io/chdb.
- test/v3/integrations/agents-conformance.test.ts is the TS twin of the Python
reference runner over the same fixture: 16/16 cases pass. Full integration
suite 46/46.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Pull request overview
Aligns chdb-node’s agent integrations (AI SDK + Mastra) to the cross-language ChDBTool contract used by chdb-io/chdb, including a shared conformance fixture and a new framework-agnostic chdb/agents entry point.
Changes:
- Introduces
integrations/agents/ChDBToolimplementing the canonical contract tool surface (P1–P5), plus shared error parsing and safety helpers. - Refactors
integrations/ai-sdkandintegrations/mastraadapters into thin shims overChDBTool.call()using a shared descriptor list. - Vendors the contract + conformance fixture and adds a TypeScript conformance runner test.
Reviewed changes
Copilot reviewed 22 out of 22 changed files in this pull request and generated 5 comments.
Show a summary per file
| File | Description |
|---|---|
| test/v3/integrations/mastra.test.ts | Updates Mastra adapter tests to assert canonical tool names and envelope-shaped results. |
| test/v3/integrations/ai-sdk.test.ts | Updates AI SDK adapter tests for canonical toolset, param binding, read-only envelope errors, and 64-bit JSON behavior. |
| test/v3/integrations/agents-conformance.test.ts | Adds TS conformance runner that executes the vendored cases.jsonl against ChDBTool. |
| package.json | Adds ./agents subpath export for the new framework-agnostic entry point. |
| integrations/mastra.mjs | Replaces legacy 3-tool implementation with canonical toolset built from descriptors and delegated to ChDBTool.call(). |
| integrations/mastra.d.mts | Updates Mastra typings to expose canonical tool names and envelope return type; re-exports agent error/tool types. |
| integrations/chdb-tool-core.mjs | Removes superseded legacy framework-agnostic executor core. |
| integrations/ai-sdk.mjs | Replaces legacy 3-tool implementation with canonical toolset built from descriptors and delegated to ChDBTool.call(). |
| integrations/ai-sdk.d.mts | Updates AI SDK typings to expose canonical tool names and envelope return type; re-exports agent error/tool types. |
| integrations/agents/tool.mjs | Adds the core ChDBTool implementation (query, introspection, attachments, call-envelope dispatch). |
| integrations/agents/tool.d.mts | Adds TypeScript typings for ChDBTool, QueryResult, and the tool-dispatch envelope. |
| integrations/agents/safety.mjs | Adds shared quoting + allowlist helpers (quoteIdent, quoteString, scanFilePaths, pathAllowed). |
| integrations/agents/safety.d.mts | Adds typings for safety helpers. |
| integrations/agents/index.mjs | Adds chdb/agents entry point exporting tool, errors, and safety helpers. |
| integrations/agents/index.d.mts | Adds typings for chdb/agents entry point exports. |
| integrations/agents/framework.mjs | Adds shared framework glue: resolveTool() and canonical descriptor list with schemas. |
| integrations/agents/errors.mjs | Adds shared error classes + parseError() to classify engine errors into typed failures. |
| integrations/agents/errors.d.mts | Adds typings for error objects and error classes. |
| integrations/agents/CONTRACT.md | Vendors the upstream cross-language agent-tool contract doc. |
| integrations/agents/conformance/README.md | Vendors upstream conformance fixture documentation. |
| integrations/agents/conformance/fixtures/sample.csv | Adds vendored fixture data for conformance cases. |
| integrations/agents/conformance/cases.jsonl | Adds vendored conformance cases executed by the TS runner. |
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chibugai
reviewed
Jul 2, 2026
…or paths Addresses the resource-lifetime review findings on the agent tools (the behavioral pillars already match the reference, so only the leaks are fixed): - ChDBTool constructor: if setup (SET queries / attachment views / the read-only lock) throws after the owned Session is created, close that Session before re-throwing — the constructor never returns, so the caller otherwise has no handle to close() and the temp dir + native handle leak. - ai-sdk / mastra chdbTools(): expose a non-enumerable close() on the returned toolset (and on chdbQueryTool's tool) that closes the Session the toolset owns. Non-enumerable so the frameworks don't treat it as a tool; a no-op when the caller passed their own session/tool. Types + docs updated. Adds test/v3/integrations/agents-tool.test.ts covering the constructor error-path cleanup, close() idempotency, caller-owned sessions being left open, and the non-enumerable toolset close(). Integration suite 50/50. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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…w integrations Additive minor release on top of 3.1.0 (2026-06-24). No breaking changes; existing 3.1.0 APIs continue to work unchanged. libchdb bits are unchanged (chdb-core v26.5.1-rc.1 packaged as @chdb/lib-* 26.5.2 — no republish needed, the subpackage-matrix job will idempotent-skip). ## What's new ### Layer 3 fluent query builder SDK (#55, #59) First-class typed fluent query API — Kysely-/Drizzle-style: const db = connect({ session }) const rows = await db .from('users') .where(r => r.age.gt(18)) .select('id', 'name') .execute() - `src/layer3/{builder,execute,compile,dialect,introspection,connect,types,codegen}/` - `chdb-gen-types` CLI — generates row types from a schema (Drizzle / Prisma / raw SQL sources) - `.stream()` terminal with server-side parameter binding - Arrow C Data Interface support: register JS columnar data as `arrowstream()` tables - 12 new test files under `test/v3/layer3/` ### Cross-language agent-tool contract + 2 framework adapters (#61, #66) - `chdb/ai-sdk` — Vercel AI SDK tools (`generateText`/`streamText`) - `chdb/mastra` — Mastra tools + `ChDBVector` (HNSW RAG store) + `ChDBStore` - Both are thin wrappers over `ChDBTool.call()` from `integrations/agents/`, which implements the cross-language contract vendored from `chdb-io/chdb` (`chdb/agents/CONTRACT.md`, chdb-io/chdb#597). - 7 canonical tools: `run_select_query` / `list_databases` / `list_tables` / `describe_table` / `get_sample_data` / `list_functions` / `attach_file` - 5 pillars enforced: engine-level readonly=2 (P1), value-vs-identifier separation (P2), truncation flag (P3), error envelope for model self-correction (P4), resource/source controls (P5) - Behavior verified against the shared `conformance/cases.jsonl` fixture ### `chdb/hypequery` DatabaseAdapter (#63, #65) Lets `@hypequery/clickhouse` query builder run on embedded chDB instead of a remote ClickHouse server. Uses hypequery's own `substituteParameters` (imported, not copied) so rendered SQL stays byte-identical to hypequery's built-in HTTP adapter. ### `chdb/connection` stabilization for @clickhouse/client 1.23.0 - `peerDependency: "@clickhouse/client: >=1.23.0"` (optional) — old client triggers a clear npm warning instead of a runtime TS error - Parity runner switched to track `ClickHouse/clickhouse-js` release tag `client-1.23.0` (per the sync-policy table; #52 shipped the initial hook) - Runner auto-detects upstream Vitest layout (pre-/post-clickhouse-js#931) - Runner re-synced when clickhouse-js reorganized into a monorepo (#62) ### AI-discovery docs (#60) - Top-level `AGENTS.md` + `llms-full.txt` - Per-subpath `AGENTS.md` (`src/layer3/`, `src/connection/`, etc.) - All packaged in `files` so agents crawling the installed tarball find them ## Fixes / infrastructure - Bind `null` / `undefined` query params as SQL `\N` (contributor @dfrankland, #68) — matches `@clickhouse/client` behavior - `close()`-mid-flight engine abort + ResultSet teardown race (#56) - `ChDBVector` HNSW granularity / filter binding / dimension guard (#61) - Release workflow: publish → `unverified` dist-tag → clean-install verify matrix → promote to `latest` (#64). A broken release now never reaches `latest` users. - CI: cache deps + harden npm registry fetch against transient resets ## User-facing installation matrix ``` npm install chdb # base + Layer 3 SDK npm install chdb @clickhouse/client # + chdb/connection npm install chdb @hypequery/clickhouse # + chdb/hypequery npm install chdb ai zod # + chdb/ai-sdk npm install chdb @mastra/core zod # + chdb/mastra ``` Native libchdb: chdb-core v26.5.1-rc.1 (packaged as @chdb/lib-* 26.5.2), unchanged from 3.1.0. Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
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Brings chdb-node's agent tools into conformance with the cross-language agent-tool contract introduced in chdb-io/chdb (
chdb/agents/CONTRACT.md, see chdb-io/chdb#597). The Pythonchdb.agents.ChDBToolis the reference; this makes the TypeScript binding implement the same methods with the same semantics, verified against the same fixture.Why
The existing
chdb/ai-sdkandchdb/mastratools predated the contract: only 3 methods (chdbQuery/chdbListTables/chdbDescribeSource), different names, no parameter binding, no shared error classification / 64-bit policy / resource controls, and no conformance runner. That's a parallel implementation that can drift from Python — exactly what the contract exists to prevent.The aligned base (
integrations/agents/, mirrorschdb.agents)tool.mjs—ChDBToolwith the full canonical method set:run_select_query,list_databases,list_tables,describe_table,get_sample_data,list_functions,attach_file, plustoolSpecs()/call().SET readonly=2, immutable, opt out withreadOnly:false).{name:Type}params (never concatenated); identifiers viaquoteIdent(backtick-double-escape, reject NUL).maxRows+maxBytesguard with atruncatedflag (never silent).call()returns the{ ok, result } | { ok, error }envelope; direct methods reject with typed errors.errors.mjsuses the same regex + code map as the reference (164→READONLY,62→SYNTAX,46/47/60/81/115→UNKNOWN_*).max_execution_time,file_allowlist,attachments+attach_file.output_format_json_quote_64bit_integers=1).dataframe_query(in-process pandas viaPython()) is intentionally omitted — a language-specific capability outside the cross-language base, per the contract.Frameworks are now thin shims
ai-sdk.mjsandmastra.mjsbuild the identical canonical tool set from one shared descriptor list and delegate every call toChDBTool.call(), so both frameworks (and Python) behave identically. Removedchdb-tool-core.mjs. New framework-agnostic entry point:import { ChDBTool } from 'chdb/agents'.Contract + conformance vendored into chdb-node
integrations/agents/CONTRACT.mdandconformance/{cases.jsonl,fixtures,README}are synced mirrors of the canonical files upstream (provenance noted at the top of each).test/v3/integrations/agents-conformance.test.tsis the TypeScript twin of the Python reference runner, over the samecases.jsonl.Verification
agents-conformance,ai-sdk,mastra,chdb-vector,chdb-store,hypequery).ai/@mastra/core/zodoptional peers.Note: the pre-existing
layer3/{arrow-input,stream}local failures are environmental (they fail identically on a cleanmainhere) and unrelated to this change.🤖 Generated with Claude Code
Note
Implement cross-language agent-tool contract for chDB with typed errors, safety helpers, and seven canonical tools
./agentssubpath export (agents/) implementing the full chDB agent-tool contract:ChDBToolwith engine-enforced read-only mode, parameter binding, result capping with truncation signaling, and structured error envelopes.ChDBError,ChDBReadOnlyError,ChDBSyntaxError,ChDBUnknownObjectError) with aparseError()function that maps engine exception codes and types to the correct subclass.quoteIdent,quoteString,pathAllowed,scanFilePaths) for identifier quoting, string literal escaping, and file path allowlist enforcement.run_select_query,list_databases,list_tables,describe_table,get_sample_data,list_functions,attach_file) withToolEnvelopesemantics and aclose()method.ChDBTool.call().Macroscope summarized d97d2df.