Borrowing it
Nothing to install: this file belongs to jakubkrzysztofsikora/screen-recording. 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/jakubkrzysztofsikora/screen-recording/main/CLAUDE.mdgit clone --depth 1 https://github.com/jakubkrzysztofsikora/screen-recordingWrote 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/jakubkrzysztofsikora/screen-recording/claude-md)<a href="https://agentmods.dev/instructions/jakubkrzysztofsikora/screen-recording/claude-md"><img src="https://agentmods.dev/badge/instructions/jakubkrzysztofsikora/screen-recording/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/jakubkrzysztofsikora/screen-recording/claude-md"><img src="https://agentmods.dev/badge/instructions/jakubkrzysztofsikora/screen-recording/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 | $0.00335 | $0.00335 |
| Opus 5.5 | $0.00134 | $0.00134 |
| Sonnet 5.5 | $0.00067 | $0.00067 |
| Haiku 4.5 | $0.00034 | $0.00034 |
Grade A, and why
screen-recording 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 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
- FFmpeg is spawned via `child_process.spawn()` (never `exec()`) for security What it actually says
screen-recorder-mcp
MCP server for macOS screen recording via FFmpeg avfoundation.
Quick Reference
- Language: TypeScript (strict mode, ESM)
- Runtime: Node.js 18+
- Platform: macOS only (uses avfoundation)
- Transport: stdio
- Build:
npm run build(outputs todist/) - Test:
npm test(Jest with ESM via--experimental-vm-modules) - Typecheck:
npm run typecheck - Lint:
npm run lint
Architecture
src/index.ts— MCP server entry point, registers 5 toolssrc/recorder.ts—ScreenRecorderclass managing FFmpeg child processsrc/devices.ts— avfoundation device discovery (screen + audio)src/storage.ts—RecordingStorageclass, persists to~/.screen-recorder-mcp/recordings.jsonsrc/types.ts— All types and custom error classes
Key Design Decisions
- Only one recording at a time (enforced in
ScreenRecorder) - FFmpeg is spawned via
child_process.spawn()(neverexec()) for security - Graceful stop sends
q\nto FFmpeg stdin, with 10s SIGKILL timeout - All tool handlers catch errors and return structured
{ success: false, error_type, error, resolution }— never throw to the MCP client - Tests mock
child_process.spawn— never actually spawn FFmpeg in unit tests
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 · 31 lines · 335 tokens per session scan A a221b534fd8a
screen-recording CLAUDE.md is an instructions file published in the GitHub repository jakubkrzysztofsikora/screen-recording (0 stars, last pushed 7mo ago), licensed MIT. It adds 335 tokens to every session, about $0.0013 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
screen-recording CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| screen-recording CLAUDE.mdjakubkrzysztofsikora/screen-recording | Instructions file | 0 | 7mo ago | MIT | A | 335 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |