Borrowing it
Nothing to install: this file belongs to ashlrai/phantom-secrets. 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/ashlrai/phantom-secrets/main/AGENTS.mdgit clone --depth 1 https://github.com/ashlrai/phantom-secretsWrote 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/ashlrai/phantom-secrets/agents-md)<a href="https://agentmods.dev/instructions/ashlrai/phantom-secrets/agents-md"><img src="https://agentmods.dev/badge/instructions/ashlrai/phantom-secrets/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/ashlrai/phantom-secrets/agents-md"><img src="https://agentmods.dev/badge/instructions/ashlrai/phantom-secrets/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 | $0.04406 | $0.04406 |
| Opus 5.5 | $0.01762 | $0.01762 |
| Sonnet 5.5 | $0.00881 | $0.00881 |
| Haiku 4.5 | $0.00441 | $0.00441 |
Grade B, and why
phantom-secrets AGENTS.md scanned grade B 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 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
phantom setup --client codex # ~/.codex/config.toml How it starts
The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Phantom — AI Agent Instructions
Phantom is an open-source CLI that keeps real API-key values out of supported, value-blind AI-agent paths. It replaces managed secrets with persistent
phm_mappings; an authenticated local proxy injects only a matched route's vault value into its fixed auth header. Client headers and bodies never resolve mappings. Treat project mappings as sensitive metadata.
MCP Server — Let AI manage secrets directly
Phantom includes an MCP server with core secret-management tools plus advanced audit, validation, rotation, team-vault, expiry, and compliance workflows. The release schema smoke currently enforces 54 unique tools. It works with Claude Code, Cursor, Windsurf, Codex, and any MCP-compatible tool.
Release-state snapshot verified on 2026-09-29: the immutable GitHub
release is v0.7.9 at source commit
7a51ce512ec4aee12cc29ff859036af63fbe93db. Its 19 assets, all six native
release rows, and GitHub provenance and SPDX attestations are bound to that
immutable release. Exact public registry endpoints were requeried on 2026-09-29.
Homebrew is independently published at the
separately reviewed previous v0.7.8 (tap bump pending); npm latest remains
0.6.0, and the npm 0.7.4 wrappers remain quarantined under
release-candidate. This GitHub receipt does not establish npm, crates.io, or
MCP Registry publication, hosted-service
commissioning, provider activation, certification, or customer acceptance.
Setup by IDE
One command per client — Phantom writes the right config file for each:
phantom setup --client claude # .mcp.json; see docs/claude-code.md for v0.7.9 migration
phantom setup --client cursor # ~/.cursor/mcp.json
phantom setup --client windsurf # ~/.codeium/windsurf/mcp_config.json
phantom setup --client codex # ~/.codex/config.toml
phantom setup --client claude --print # snippet to stdout for any client
phantom setup --status # read-only: which clients are wired (add --json)
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 · +3 lines · +77 tokens per session 8f519c785b83
- 9d ago Changed · +8 lines · +423 tokens per session 4dde3b352b47
- 10d ago Changed · +18 tokens per session 1d3af8ec3818
- 27d ago Changed · +9 tokens per session c6ee9e6b0b58
- 1mo ago Changed · +2 lines · +20 tokens per session b67c13b37036
- 1mo ago Changed · +75 lines · +1,658 tokens per session 5269621106e1
- 1mo ago First seen · 133 lines · 2,201 tokens per session scan B c73c7e4d6c02
phantom-secrets AGENTS.md is an instructions file published in the GitHub repository ashlrai/phantom-secrets (18 stars, last pushed today), licensed MIT. It adds 4,406 tokens to every session, about $0.0176 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). 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).
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.