context-mode

A set of rules for handling large command results, files, documentation, and other outputs so they do not overwhelm the agent's working context.

In plain words
What is it for?
Use it when running commands or reading files that may produce more than a small amount of output.
Why use it?
It keeps large amounts of text manageable and makes it easier to find the relevant details.

Cursor rule

Install

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.

agentmods
npx agentmods add rules/phanindra208/universal-context-mode/context-mode
Clone the repo
git clone --depth 1 https://github.com/Phanindra208/universal-context-mode
Per session 352 This file is loaded in full into every session.
When invoked 352 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00352 $0.00352
Opus 5 $0.00176 $0.00176
Sonnet 5 $0.00070 $0.00070
Haiku 4.5 $0.00035 $0.00035

Measured yesterday against content hash a2326c1d6ddc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

context-mode 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 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.

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.

templates/cursor/context-mode.mdc · 44 lines

What it actually says

Context Preservation Rules

When executing commands that may produce large output (>5KB), use the context-mode MCP tools:

  • Instead of running shell commands directly, use context-mode.execute with language: "shell"
  • Instead of reading large files, use context-mode.execute_file
  • When fetching documentation, use context-mode.fetch_and_index + context-mode.search
  • For any tool returning large output, use context-mode.compress

Commands likely to produce large output

  • git log, git diff, cat large files, find, reading log files
  • npm list, pip list, dependency audits, yarn why
  • API responses, test suite output (>100 tests)
  • Browser snapshots, web page content, database dumps

Example usage

// Instead of: bash("git log --oneline -50")
execute({ language: "shell", code: "git log --oneline -50", intent: "recent changes" })

// Instead of: read_file("package-lock.json")
execute_file({
  file_path: "package-lock.json",
  code: "const d=JSON.parse(process.env.FILE_CONTENT); console.log('Packages:', Object.keys(d.dependencies||{}).length)"
})

// Compress any large text
compress({ content: largeOutput, intent: "find error messages" })

// Fetch and index docs
fetch_and_index({ url: "https://docs.example.com" })
search({ query: "what I need to know" })

// Check how much context was saved this session report()

Changes

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.

  1. yesterday First seen · 44 lines · 352 tokens per session scan A a2326c1d6ddc

Subscribe to this mod's changes

context-mode is a cursor rule published in the GitHub repository Phanindra208/universal-context-mode (5 stars, last pushed 5mo ago), licensed MIT. It adds 352 tokens to every session, about $0.0018 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 2026-08-31.