Borrowing it
Nothing to install: this file belongs to neXenio/bifrost-plugin. 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/neXenio/bifrost-plugin/master/AGENTS.mdgit clone --depth 1 https://github.com/neXenio/bifrost-pluginWrote 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/nexenio/bifrost-plugin/agents-md)<a href="https://agentmods.dev/instructions/nexenio/bifrost-plugin/agents-md"><img src="https://agentmods.dev/badge/instructions/nexenio/bifrost-plugin/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/nexenio/bifrost-plugin/agents-md"><img src="https://agentmods.dev/badge/instructions/nexenio/bifrost-plugin/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 | $0.01068 | $0.01068 |
| Opus 5.5 | $0.00427 | $0.00427 |
| Sonnet 5.5 | $0.00214 | $0.00214 |
| Haiku 4.5 | $0.00107 | $0.00107 |
Grade A, and why
bifrost-plugin 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
bifrost-plugin — AGENTS.md
Skill Discovery — check before non-trivial work (MANDATORY)
The bifrost MCP gateway may expose a shared skill library and a set of MCP
servers (docs, search, issue tracker, memory, etc.) — whatever your gateway is
configured to route to.
BEFORE starting any non-trivial task — implementing a feature, writing a
migration, debugging, reviewing a PR, deploying, setting up infra, writing tests,
or drafting docs — you MUST call the gateway's skill-search tool, typically
mcp__plugin_<plugin>_bifrost__<skills-server>-skill_search (the plugin server;
mcp__bifrost__… only for a hand-added server, mcp__claude_ai_<Name>__… via the claude.ai
connector; the skill server is named skills by default; set BIFROST_SKILLS_SERVER if your gateway names it
differently), with a short description of the task. It returns the top matching
skills (a skill may handle the task entirely or give a specialized workflow). If
search doesn't surface the right one, browse with the corresponding
skill_navigate tool (decision tree), then load the chosen skill's full
instructions with get_skill before proceeding.
Skip skill discovery for: single-line edits with a known target, file reads / grep, clarifying questions, or tasks the user has scoped to one file.
Gateway routing (use bifrost, don't ask the user / don't guess)
Route capability requests through whichever MCP servers your gateway exposes, for example:
- Issue / ticket status → your issue-tracker server
- Production errors / stacktraces → your error-tracking server
- Analytics / database queries → your analytics server
- Up-to-date library/API docs → your docs server (NOT training memory)
- Web search → your web-search server
- Past decisions, people, project facts → your memory server (query directly via the gateway's memory MCP tool — see Memory section below)
Memory — agent-driven via the gateway MCP
Memory is accessed through the gateway's memory MCP server. There is no automatic HTTP injection — memory recall and save are your responsibility as the agent.
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.
- 8d ago Changed · +2 lines · +112 tokens per session 75590d7c38e0
- 9d ago Changed · +9 tokens per session 18a6bc32b41d
- 1mo ago First seen · 87 lines · 947 tokens per session scan A a7b838e2b0e2
bifrost-plugin AGENTS.md is an instructions file published in the GitHub repository neXenio/bifrost-plugin (4 stars, last pushed 8d ago), licensed MIT. It adds 1,068 tokens to every session, about $0.0043 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 2026-08-31.
Other instructions, from other repositories
vscode buildNext.instructions.md
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