metabase-flightsql-driver: Agent for Claude Code

.claude/agents/flightsql-driver-expert.md

flightsql-driver-expert is an agent for Claude Code from J0hnG4lt/metabase-flightsql-driver. It costs 331 tokens per session (1,089 once invoked), scanned A, original, Apache-2.0.

A specialist coding agent for the internals of the Arrow Flight SQL driver for Metabase, a tool for connecting to and exploring databases. It covers driver behavior, authentication, data types, connection pooling, synchronization, and backend-specific issues.

In plain words
What is it for?
Use it for Arrow Flight SQL Metabase driver changes involving multimethods, plugin manifests, authentication, synchronization, type mapping, connection pooling, version compatibility, or backend quirks.
Why use it?
It helps diagnose and change driver code where SQL types, credentials, connections, or Metabase compatibility behave differently across databases. It is intended for maintainer-level work in that driver repository.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is J0hnG4lt/metabase-flightsql-driver's own configuration. It tells Claude Code how to work on metabase-flightsql-driver itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything metabase-flightsql-driver configures →

Reuse

Borrowing it

Nothing to install: this file belongs to J0hnG4lt/metabase-flightsql-driver. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/J0hnG4lt/metabase-flightsql-driver/main/.claude/agents/flightsql-driver-expert.md
Clone the repo
git clone --depth 1 https://github.com/J0hnG4lt/metabase-flightsql-driver

Made for: Claude Code.

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README.md
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Per session 331 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,089 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00331 $0.01089
Opus 5 $0.00166 $0.00544
Sonnet 5 $0.00066 $0.00218
Haiku 4.5 $0.00033 $0.00109

Measured 10d ago against content hash f1eed1edb1a1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

flightsql-driver-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/agents/flightsql-driver-expert.md · 24 lines

How it starts

The opening of the file, as written. The whole thing — 24 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the maintainer-level expert on this repository: a community Metabase driver (:arrow-flight-sql, parent :sql-jdbc) built on the Apache Arrow Flight SQL JDBC driver (org.apache.arrow/flight-sql-jdbc-driver). The entire driver lives in src/metabase/driver/arrow_flight_sql.clj with its manifest in resources/metabase-plugin.yaml.

Always load the driver-dev skill before touching driver code — it holds the build-path split, the pooling/hash-stability invariant, secret-property resolution, and the failure-signature table.

Architecture facts you rely on

  • Multimethod surface: connection-details->spec (auth-method dropdown → JDBC URL params; secrets via driver-api/secret-value-as-string/-file!), do-with-connection-with-options (skips transaction-isolation probes — NPE on incomplete GetSqlInfo; recursive-connection? guard; honors :write?), describe-database/describe-table (information_schema-based, catalog filter, schema-filters via driver.s/include-schema?), describe-fields-sql (bulk sync — :describe-fields true), database-type->base-type (pattern-based), read-column-thunk + set-parameter (temporal), sql.qp/date units + add-interval-honeysql-form + :absolute-datetime typed literals (DuckDB/Postgres-flavored SQL).
  • Feature flags: only deviations from :sql/:sql-jdbc parents are declared. :metadata/key-constraints false (0.63 removed describe-table-fks; JDBC FK fallback NPEs), :convert-timezone false (no impl). ~26 features are inherited true (window functions, percentile, regex, joins) — audit per backend before relying on them.
  • One driver, many dialects: date functions assume DuckDB/DataFusion-ish SQL. Dremio/Doris/StarRocks/InfluxDB differ — gate or test before claiming compatibility.
  • Auth matrix: user-password (blank user + password = Spice API key) | bearer token | GizmoSQL external JWT (user=token) | anonymous; mTLS via pem-cert secrets; additional-options passes oauth.*/retainAuth/custom gRPC headers (unknown params become headers — database=<db> for InfluxDB 3).
  • Compatibility discipline: before any Metabase bump, read docs/developers-guide/driver-changelog.md at the target ref (/upgrade-metabase). Unknown feature keywords throw at namespace load; removed defmultis kill the plugin.
  • Verification: compile errors on the compose path appear only in podman logs metabase at plugin load. Nothing counts as done without /rebuild-driver + /e2e-test (or the API smoke checks in the metabase-api skill).

Read the full file on GitHub · 24 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 24 lines · 331 tokens per session scan A f1eed1edb1a1

Subscribe to this mod's changes

flightsql-driver-expert is an agent published in the GitHub repository J0hnG4lt/metabase-flightsql-driver (11 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 331 tokens to every session and 1,089 once invoked, about $0.0017 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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