metabase-flightsql-driver: Instructions file for Claude Code

CLAUDE.md

metabase-flightsql-driver CLAUDE.md is an instructions file for Claude Code from J0hnG4lt/metabase-flightsql-driver. It costs 779 tokens per session, scanned B, original, Apache-2.0.

Project instructions for a Metabase database driver that connects Metabase to Arrow Flight SQL servers, a way to query data through a standard database connection.

In plain words
What is it for?
Use them to develop or rebuild the driver, configure Metabase connections and filters, run full integration tests, or upgrade the Metabase version used by the project.
Why use it?
They record the driver’s structure, build process, authentication details and end-to-end checks, helping developers change or test it without breaking its connection behavior.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions CLAUDE.md.

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.md
Clone the repo
git clone --depth 1 https://github.com/J0hnG4lt/metabase-flightsql-driver

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 779 This file is loaded in full into every session.
When invoked 779 The same file — it is already loaded in full.
Security scan B 1 finding. 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 $0.00779 $0.00779
Opus 5 $0.00390 $0.00390
Sonnet 5 $0.00156 $0.00156
Haiku 4.5 $0.00078 $0.00078

Measured 10d ago against content hash f7cb57f23370, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

metabase-flightsql-driver CLAUDE.md scanned grade B with 1 finding 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.

Reads MCP configurationmediumAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

`.mcp.json` runs a Metabase MCP server (`@imlewc/metabase-server`) against the local stack — export `METABASE_API_KEY` from `.env` first. The bundled official MCP server (`/api/metabase-mcp`, OAuth) suits interactive exp
CLAUDE.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — Metabase Arrow Flight SQL Driver

Clojure Metabase driver (:arrow-flight-sql, parent :sql-jdbc) over the Apache Arrow Flight SQL JDBC driver. Demo backends: GizmoSQL (DuckDB) and Spice.ai OSS; the same driver reaches Dremio, InfluxDB 3, Doris, StarRocks, and any other Flight SQL server.

Skills (read these before working in their area)

  • driver-dev — editing src/ or the plugin manifest: build paths, rebuild cycle, pooling/connection-options invariants, auth-mode mapping, known failure signatures.
  • metabase-api — scripting/validating Metabase via REST or MCP: API keys, field filters with aliases, dashboard parameters.

Commands

  • /e2e-test — full clean-slate end-to-end test (compose up → setup script → assertions).
  • /rebuild-driver — rebuild the driver jar and restart Metabase after a code change.
  • /upgrade-metabase <ref> — bump the Metabase pin (compose + CI matrix) with the driver-changelog checklist.

Layout

src/metabase/driver/arrow_flight_sql.clj   # the whole driver
resources/metabase-plugin.yaml             # manifest: auth-method dropdown, secrets, schema-filters
scripts/metabase_setup.py                  # e2e: admin, API key -> .env, connections, 32-card dashboard
docker-compose.yaml                        # metabase + postgres + spiced + gizmosql + builder
gizmosql/init.sql                          # 3 catalogs (memory/warehouse/staging), sales/hr/analytics
spice/spicepod.yaml                        # Spice v2 pod, api-key auth
.github/workflows/build.yaml               # lint + matrix build {v0.62.5, v0.63.1} + manual release

Build truth

Two build paths produce different artifacts — see the driver-dev skill. Compose uses the builder (lein) jar and compile errors only appear in podman logs metabase at plugin load; CI/releases use bin/build-driver.sh inside a Metabase checkout.

Everyday commands

podman compose up -d                      # start everything
python scripts/metabase_setup.py          # setup + test dashboard; writes .env
podman logs metabase 2>&1 | tail -100
podman logs metabase 2>&1 | grep -i "hash.*changed\|connections:"   # pool health

Read the full file on GitHub · 54 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 · 54 lines · 779 tokens per session scan B f7cb57f23370

Subscribe to this mod's changes

metabase-flightsql-driver CLAUDE.md is an instructions file published in the GitHub repository J0hnG4lt/metabase-flightsql-driver (11 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 779 tokens to every session, about $0.0039 per session on Opus 5. A static security scan graded it B with 1 finding (reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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