Borrowing it
Nothing to install: this file belongs to dmtrkzntsv/syncai. 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/dmtrkzntsv/syncai/main/CLAUDE.mdgit clone --depth 1 https://github.com/dmtrkzntsv/syncaiWrote 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/dmtrkzntsv/syncai/claude-md)<a href="https://agentmods.dev/instructions/dmtrkzntsv/syncai/claude-md"><img src="https://agentmods.dev/badge/instructions/dmtrkzntsv/syncai/claude-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/dmtrkzntsv/syncai/claude-md"><img src="https://agentmods.dev/badge/instructions/dmtrkzntsv/syncai/claude-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 | $0.01229 | $0.01229 |
| Opus 5.5 | $0.00492 | $0.00492 |
| Sonnet 5.5 | $0.00246 | $0.00246 |
| Haiku 4.5 | $0.00123 | $0.00123 |
Grade A, and why
syncai CLAUDE.md 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.
`.github/workflows/syncai.yml` runs syncai against the repo's own `syncai.json` on every push (except `main` and `release/*`). It builds from source (`make build`) — do **not** reintroduce the cross-repo binary download; This is a copy
100% identical to syncai copilot-instructions.md — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to a Coding Agent when working with code in this repository.
Build & run
make build—go mod tidythen build tobin/syncai.make run— builds and then runsgo run ./cmd -config syncai.json.make clean— removesbin/.
There is no test suite in this repo (no *_test.go files). Verify changes with make build plus a manual smoke test against a temp working directory:
./bin/syncai -workdir /tmp/syncai-smoke -config /tmp/syncai-smoke/syncai.json -no-watch
CLI flags: -config, -workdir, -no-watch (one-shot for CI), -self-update, -version, -help.
Architecture
SyncAI is a polling watcher that propagates AI-assistant config files between agents (Cursor, Copilot, Claude Code, Codex). The whole program is a single Go binary; the moving parts split cleanly along four "sync kinds" defined in internal/model/model.go:
| Kind | Source config field | Source unit | Destination logic |
|---|---|---|---|
| context | Agent.Context.Path |
single file | verbatim copy |
| ignore | Agent.Ignore.Path |
single file | verbatim copy |
| rules | Agent.Rules.Pattern |
files matched by glob | content rewritten by per-agent rules generator (frontmatter shape differs between cursor's globs/alwaysApply and copilot's applyTo) |
| skills | Agent.Skills.Pattern |
whole directory matched by glob | every file inside the matched dir copied verbatim, preserving the in-skill relative path |
Lifecycle
cmd/main.goloads config, runsinitialSync(dedup keykind|stem|rel, picks the newest mtime per logical file across agents), then enters a ticker loop atcfg.Interval()(default 5s).- Each tick rebuilds the watched-file list via
(config.Agent).Files()and diffs sha256 hashes against the in-memoryfilesState. Changes →(*SyncAI).Sync. Missing entries →(*SyncAI).Delete. Files()uses two distinct collectors:globPattern(file glob, used for rules) andwalkSkillDirs(recursive walk of every matched directory, used for skills). Don't conflate them.
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 · 70 lines · 1,229 tokens per session scan A 967c45727f89
syncai CLAUDE.md is an instructions file published in the GitHub repository dmtrkzntsv/syncai (10 stars, last pushed 5mo ago), licensed MIT. It adds 1,229 tokens to every session, about $0.0049 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to syncai copilot-instructions.md, differing in 0 lines, and is treated as a copy.
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).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.