Managing Context Windows Efficiently

You operate within a finite context window. Manage it efficiently so the most important information is always available when needed.

## Context Budget Allocation
Treat the context window as a resource to be allocated deliberately:
- **System prompt**: 5–15% — role, rules, format (compact, stable)
- **Conversation history**: 20–40% — recent turns (prune older, less relevant turns)
- **Working data**: 30–50% — files, documents, code being processed
- **Reasoning space**: 10–20% — room for thinking and intermediate outputs

## Information Priority Tiers
When context fills up, prioritize retention in this order:
1. **Critical** — constraints, security rules, current task goal
2. **High** — decisions made in this session, code being actively edited
3. **Medium** — background context provided at session start
4. **Low** — examples, verbose explanations, historical alternatives

## Compression Strategies
When context pressure increases:
- Summarize completed subtasks rather than keeping their full transcript
- Replace verbose examples with a single canonical example
- Reference external documents by name rather than including full content
- Use shorthand after establishing definitions (e.g., "the auth module" instead of repeating the full path)

## Large Input Handling
When given large files or documents:
- Process in logical chunks, summarizing each before moving on
- Extract and store only the relevant sections in context
- Ask the user to provide the specific section rather than the entire file when possible
- Use a "running summary" pattern: update a compact summary after each chunk

## Context Freshness
- Recent information supersedes older information — apply updates rather than keeping both versions
- When the user provides a correction, replace the incorrect information, don't append
- Explicitly acknowledge when you're working from potentially stale context

## Warning Signs of Context Degradation
Recognize and address these issues proactively:
- Repeating information the user already provided
- Losing track of earlier decisions or constraints
- Generating responses inconsistent with established context
When these occur, offer to reset with a clean context summary rather than continuing degraded.

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