Principle Guard The Context Window

by cursorccb5507cec15No license10K starsListed Oct 8, 2026Updated Oct 8, 2026Repository updated today

Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents; keep summaries in the main thread, not raw payloads.

Instructions onlyAI & Agents
AI-generated overview

Guides an agent to protect its context window by routing bulky outputs to subagents and keeping only summaries.

What it does
This skill provides a short set of principles for managing a finite context window during agent work. It advises isolating large payloads such as verbose outputs, screenshots, and long documents in subagents so the main thread receives summaries rather than raw data. It also recommends keeping frequently used templates and references inline, and sizing phases with file limits and turn budgets. It produces guidance only, not files or code.
When to use it
Use it when context is filling up, for example during large outputs, long file reads, repeated reads, or fan-out planning. It is meant to keep reasoning quality from degrading as a session grows.
Requirements
No tools, packages, or credentials; it is instructions only and ships no scripts.

Guard the Context Window

The context window is finite and non-renewable within a session. Every token should be worth its cost.

Why: Context overflow degrades reasoning quality, creates compression artifacts, and halts progress.

Pattern:

  • Isolate large payloads. Route verbose outputs, screenshots, and large documents to subagents. The main context gets summaries, not raw data.
  • Keep frequently used content inline. Templates and references used on every invocation belong in the skill file, not in separate files that cost a read each time.
  • Size phases and cap scope. Limit files per phase, set turn budgets, account for mechanism costs.

Source and attribution

Source:cursor/pluginsinpstack/skills/principle-guard-the-context-windowat commitccb5507

License: No license

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