Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/open-metadata/openmetadata/dev-setupnpx skills add open-metadata/OpenMetadata --skill dev-setupgit clone --depth 1 https://github.com/open-metadata/OpenMetadataWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00105 | $0.02164 |
| Opus 5 | $0.00053 | $0.01082 |
| Sonnet 5 | $0.00021 | $0.00433 |
| Haiku 4.5 | $0.00011 | $0.00216 |
Grade B, and why
dev-setup 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 yesterday.
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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
`sudo systemctl enable --now docker` and `sudo usermod -aG docker $USER`, then log out and How it starts
The opening of the file, as written. The whole thing — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Dev Environment Setup
Bring a checkout from "just cloned" to "can build the backend, the UI, and the ingestion framework" with one call.
When to Activate
- "set up my dev environment", "onboard me", "I just cloned this repo"
- "set up this worktree" (a Claude Code worktree does not inherit the main repo's venv)
- A build fails on a missing or wrong-version tool:
antlr4: command not found,class file has wrong version,Unsupported engine … node,ModuleNotFoundError: metadata.generated - "check my environment", "why doesn't
make generatework"
The One Call
./scripts/dev_setup.sh # or: make dev_setup
Everything is idempotent — re-running skips what is already correct. Useful flags
(pass through the Makefile as make dev_setup ARGS="--slim -y"):
| Flag | Effect |
|---|---|
--check |
Diagnose only, change nothing. Returns nonzero when issues are found. Always start here on an existing checkout. |
--slim |
Install ingestion[dev] instead of [all-dev-env]. Minutes instead of tens of minutes; omits most connector deps. Right choice unless the work touches a specific connector. |
-y |
Non-interactive (assumes yes for Homebrew/nvm/Docker prompts). |
--with-build |
Also runs mvn clean install -DskipTests -T 1C. |
--with-docker |
Also starts docker/development/docker-compose.yml. |
--skip-tools |
Verify system packages instead of installing them (no sudo/brew writes). |
--skip-python / --skip-ui / --skip-generate / --skip-precommit |
Skip that phase. |
--python <bin> |
Force the interpreter the venv is built from. |
Process
Step 1 — Diagnose before changing anything
./scripts/dev_setup.sh --check
Read the warnings. They name the exact missing piece; do not install anything the check reports as already present.
Step 2 — Choose the depth
- Backend/UI work only, or a new worktree →
./scripts/dev_setup.sh --slim -y - Connector or ingestion work →
./scripts/dev_setup.sh -y(full[all-dev-env]) - Ask the user before running the full install if they are on a metered/slow link — it downloads every connector's dependencies.
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.
- yesterday First seen · 172 lines · 105 tokens per session scan B 5e9185199460
dev-setup is a skill published in the GitHub repository open-metadata/OpenMetadata (15,032 stars, last pushed yesterday), licensed Apache-2.0. It adds 105 tokens to every session and 2,164 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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