# Principle Guard The Context Window

> Apply when context is filling up from large outputs, long files, or repeated reads. Filter bulk evidence and isolate bounded exploration when delegation earns its overhead.

- Skill: `hungrykelvin123/principle-guard-the-context-window` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add hungrykelvin123/principle-guard-the-context-window`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hungrykelvin123/principle-guard-the-context-window/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: HungryKelvin123 (https://skillmd.com/u/hungrykelvin123)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/hungrykelvin123/principle-guard-the-context-window

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# Guard the Context Window

The context window is finite and non-renewable within a session. Every token that enters should earn its place.

**Why:** Context overflow degrades reasoning quality, creates compression artifacts, and halts progress. Unlike compute or time, context spent inside a session cannot be reclaimed.

**Pattern:**
- **Filter before delegating.** Narrow verbose outputs and reads locally first. For separable exploration that still needs substantial context, read [`../david-mode/references/agent-runtime.md`](../david-mode/references/agent-runtime.md) before dispatch. Require concise findings with exact evidence paths; the parent checks decisive evidence itself. If delegation does not pass its gates, continue sequentially.
- **Don't read what you won't use.** Read selectively based on relevance. If a file isn't needed for the current task, skip it.
- **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.