Borrowing it
Nothing to install: this file belongs to xiaolai/vmark. 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/xiaolai/vmark/main/AGENTS.mdgit clone --depth 1 https://github.com/xiaolai/vmarkWrote 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/xiaolai/vmark/agents-md)<a href="https://agentmods.dev/instructions/xiaolai/vmark/agents-md"><img src="https://agentmods.dev/badge/instructions/xiaolai/vmark/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/xiaolai/vmark/agents-md"><img src="https://agentmods.dev/badge/instructions/xiaolai/vmark/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 | $0.03163 | $0.03163 |
| Opus 5.5 | $0.01265 | $0.01265 |
| Sonnet 5.5 | $0.00633 | $0.00633 |
| Haiku 4.5 | $0.00316 | $0.00316 |
Grade A, and why
vmark 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 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.
How it starts
The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Shared instructions for all AI agents (Claude, Codex, etc.) working on VMark.
Rules only. The reasoning behind each gate lives in the header of the script
that enforces it; the pre-cleanup long form is git show 12c98051e:AGENTS.md.
Working agreement
- Use English regardless of the language xiaolai writes in.
- Run
git status -sbat session start. Read relevant files before editing. - Keep diffs focused; no drive-by refactors. Do not commit unless explicitly asked.
- Keep code files under ~300 lines (
pnpm lint:file-sizeratchets down only). - Zustand: never destructure stores in components; use selectors. Use
useXStore.getState()inside callbacks. - Keep features local; avoid cross-feature imports unless truly shared.
- Research before building: look for established patterns and prior art before inventing.
- Edge cases are not optional: empty/null input, max values, concurrency, Unicode/CJK, RTL, rapid repeats, network failure, permission denial — test each.
- Test-first is mandatory for new behavior (RED → GREEN → REFACTOR). Coverage floors are enforced. Exempt: CSS-only, docs, config. See
.claude/rules/10-tdd.md. dev-docs/and.vmark/are maintainer-local (gitignored); skip references to them when absent. When present, update the dev doc a behavior change affects in the same change. Archive finished deep research todev-docs/deep-researches/YYYYMMDD-topic.mdand link it fromdev-docs/README.md.- Never bypass a hook or gate (
--no-verify, removing hooks, loosening a gate) without explicit authorization. Fix the gate instead.
Gates — what to run
check:all (~15 min) is the final gate, not the feedback loop.
| What you changed | Run |
|---|---|
One app .ts/.tsx |
pnpm test:changed, or pnpm vitest related <file> |
| Inner loop generally | pnpm check:fast (typecheck + cached lint + related tests) |
A lint gate under scripts/ |
that gate, plus its scripts/*.test.* |
| Locale JSON | pnpm lint:i18n && pnpm vitest run src/locales |
| CSS only | visual QA (no tests required) |
| Rust | cargo test --manifest-path src-tauri/Cargo.toml and cargo clippy --all-targets -- -D warnings |
Rust, adding a tauri::test mock-runtime test |
the row above, plus bash scripts/check-cross-target.sh |
| Before pushing | pnpm check:predelta (every static gate in parallel, all failures at once), then one pnpm check:all |
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 Changed · +16 tokens per session af76bbcfecfa
- 11d ago Changed · +1 lines · +67 tokens per session e2ee284370eb
- 25d ago Changed · +2 lines · +177 tokens per session 234d6816687c
- 29d ago Changed · +1 lines · +66 tokens per session 6850182c2ba8
- 1mo ago Changed · -649 lines · -9,569 tokens per session scan B → A 31ee9826b2e5
- 1mo ago Changed · +9 lines · +205 tokens per session fe7402ba3bf9
- 1mo ago Changed · +30 lines · +499 tokens per session e0b08f7fea03
- 1mo ago Changed · +26 lines · +414 tokens per session 48356f400b14
- 1mo ago Changed · +5 lines · +87 tokens per session 7d503305e759
- 1mo ago First seen · 697 lines · 11,201 tokens per session scan B d1f011d57f65
vmark AGENTS.md is an instructions file published in the GitHub repository xiaolai/vmark (878 stars, last pushed yesterday), licensed ISC. It adds 3,163 tokens to every session, about $0.0127 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.