Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/ikaleio/patchright-mcp/agents-mdgit clone --depth 1 https://github.com/Ikaleio/patchright-mcpWhat 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 | $0.00307 | $0.00307 |
| Opus 5 | $0.00153 | $0.00153 |
| Sonnet 5 | $0.00061 | $0.00061 |
| Haiku 4.5 | $0.00031 | $0.00031 |
Grade A, and why
patchright-mcp 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 2d 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
Patchright MCP Agent Instructions
These instructions are for coding agents updating upstream versions or the Patchright dependency.
Update the upstream playwright-mcp version
- Check the latest upstream version:
npm view @playwright/mcp version
- Sync versions across this repo:
package.json->versionpackages/extension/package.json->versionpackages/extension/manifest.json->version
- Refresh lockfiles:
npm install --package-lock-onlynpm install --package-lock-only --workspace=packages/extension
- Sanity-check:
rg -n "\"version\"" package.json packages/extension/package.json packages/extension/manifest.jsonto confirm versions match.
Update the Patchright version
- Check the latest Patchright version:
npm view patchright version
- Update dependency:
packages/playwright-mcp/package.json->dependencies.patchright
- Refresh lockfile:
npm install --package-lock-only
- Sanity-check:
rg -n "patchright" packages/playwright-mcp/package.json package-lock.jsonto confirm the new version is captured.
Notes
- Keep the package name as
patchright-mcpand the CLI bin asmcp-server-patchright. PLAYWRIGHT_MCP_EXTENSION_TOKENis retained for compatibility with the upstream server.
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.
- 2d ago First seen · 34 lines · 307 tokens per session scan A 68f587e42b32
patchright-mcp AGENTS.md is an instructions file published in the GitHub repository Ikaleio/patchright-mcp (23 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 307 tokens to every session, about $0.0015 per session on Opus 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.
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