trex.db.setup

A command that creates a clean PostgreSQL database and applies all project migrations. PostgreSQL is a database system, and migrations are files that create or change its tables and columns.

In plain words
What is it for?
Use it for first-time setup, after pulling database changes, after adding a Kind, or when tests report missing tables or columns. It removes the existing project database container before rebuilding it.
Why use it?
It fixes a missing or out-of-date database structure and provides a known starting point for development or integration tests.

Command for Claude Code

Install

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.

agentmods
npx agentmods add commands/ambient-code/platform/trex.db.setup
Clone the repo
git clone --depth 1 https://github.com/ambient-code/platform

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 284 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00284
Opus 5 $0.00000 $0.00142
Sonnet 5 $0.00000 $0.00057
Haiku 4.5 $0.00000 $0.00028

Measured yesterday against content hash 84cbfea7d230, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

trex.db.setup 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 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.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

components/ambient-api-server/.claude/commands/trex.db.setup.md · 48 lines

What it actually says

Set Up Database

Start a fresh PostgreSQL container and run all migrations. If a database already exists, this will tear it down first.

Instructions

  1. Check if a PostgreSQL container is already running:

    docker ps -a --filter name=ambient-api-server-postgres --format "{{.Names}} {{.Status}}"
    
  2. If a container exists, tear it down first:

    make db/teardown
    
  3. Start a fresh PostgreSQL container:

    make db/setup
    
  4. Wait for PostgreSQL to be ready:

    sleep 2
    
  5. Build the binary if not already built:

    make binary
    
  6. Run migrations:

    ./ambient-api-server migrate
    

When to Use This

  • First-time database setup
  • After generating a new Kind (new migration added)
  • After pulling changes that include new migrations
  • When integration tests fail with "relation does not exist" or column errors
  • When the database schema is corrupted or out of sync

Database Connection Details

Connection details are stored in the secrets/ directory files (db.host, db.port, db.name, db.user, db.password).

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. yesterday First seen · 48 lines · 0 tokens per session scan A 84cbfea7d230

Subscribe to this mod's changes

trex.db.setup is a command published in the GitHub repository ambient-code/platform (129 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 284 tokens. 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.