Borrowing it
Nothing to install: this file belongs to niels-emmer/myace. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/niels-emmer/myace/main/.opencode/commands/start-dev.mdgit clone --depth 1 https://github.com/niels-emmer/myaceWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/niels-emmer/myace/start-dev)<a href="https://agentmods.dev/commands/niels-emmer/myace/start-dev"><img src="https://agentmods.dev/badge/commands/niels-emmer/myace/start-dev/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/commands/niels-emmer/myace/start-dev"><img src="https://agentmods.dev/badge/commands/niels-emmer/myace/start-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00011 | $0.00205 |
| Opus 5.5 | $0.00004 | $0.00082 |
| Sonnet 5.5 | $0.00002 | $0.00041 |
| Haiku 4.5 | $0.00001 | $0.00020 |
Grade A, and why
start-dev scanned grade A 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
4. Verify the backend is healthy: `curl http://localhost:8000/health` What it actually says
Start the MyACE development environment.
Steps:
- Ensure
.envexists (copy from.env.exampleif not):cp .env.example .env - Build and start the dev stack:
docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d --build - Run database migrations:
docker compose exec backend alembic upgrade head - Verify the backend is healthy:
curl http://localhost:8000/health - Start the frontend dev server (separate terminal, for HMR):
cd frontend && npm run dev
The dev stack gives you:
- Frontend on
http://localhost:80 - Backend API on
http://localhost:8000 - Backend docs at
http://localhost:8000/docs - Frontend HMR on
http://localhost:5173(vianpm run dev)
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.
- 1mo ago First seen · 20 lines · 11 tokens per session scan A 60bedcba5413
start-dev is a command published in the GitHub repository niels-emmer/myace (1 stars, last pushed yesterday), licensed MIT. It adds 11 tokens to every session and 205 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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