Borrowing it
Nothing to install: this file belongs to mozi-app/mermAId. 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/mozi-app/mermAId/main/AGENTS.mdgit clone --depth 1 https://github.com/mozi-app/mermAIdWrote 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/instructions/mozi-app/mermaid/agents-md)<a href="https://agentmods.dev/instructions/mozi-app/mermaid/agents-md"><img src="https://agentmods.dev/badge/instructions/mozi-app/mermaid/agents-md/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/instructions/mozi-app/mermaid/agents-md"><img src="https://agentmods.dev/badge/instructions/mozi-app/mermaid/agents-md.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 | $0.00365 | $0.00365 |
| Opus 5.5 | $0.00146 | $0.00146 |
| Sonnet 5.5 | $0.00073 | $0.00073 |
| Haiku 4.5 | $0.00036 | $0.00036 |
Grade A, and why
mermAId AGENTS.md 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 2mo 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.
What it actually says
AGENTS.md
Go backend + JS frontend Mermaid diagram editor with live preview.
Testing
Go tests
- Framework: goconvey (
github.com/smartystreets/goconvey) - Run:
go test -v -race -count=1 -timeout 30s ./... - Always run with
-race - Files:
diagram_test.go,main_test.go,mcp_test.go - Use
stateDirOverride(inmain.go) to redirect state files tot.TempDir()in tests that touch the filesystem
JS tests
- Framework: vitest
- Run:
npm test - Test file:
frontend/parser.test.js
Test rules
- Never use
time.Sleepin tests — use channel +select+ timeout for async assertions - The
frontend/parser.jsis intentionally separated fromeditor.jsso it can be tested without pulling in mermaid/CodeMirror dependencies
Build
make build— full build (npm install + esbuild bundle + go build)make dev— development mode with watchmake test— run Go tests onlynpm test— run JS tests only
Plans
Implementation plans under .agents/plans/ are session scratch and are
gitignored. Do not commit them. Agents write a plan once and never update it,
so the plan goes stale fast. A stale plan misleads the next agent, because the
agent reads it as current. Decisions that outlive the work go in the PR
description, the commit message, or a comment at the line where the constraint
applies. Rules that bind future work go in AGENTS.md.
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.
- 2mo ago First seen · 37 lines · 365 tokens per session scan A d5454e2999a0
mermAId AGENTS.md is an instructions file published in the GitHub repository mozi-app/mermAId (13 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 365 tokens to every session, about $0.0015 per session on Opus 5.5. 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.
mermAId AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mermAId AGENTS.mdmozi-app/mermAId | Instructions file | 13 | 2mo ago | Apache-2.0 | A | 365 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 3d ago | MIT | A | 4,313 | Codex, OpenCode |