context-engineering

Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/julienlhk-context-engineering

About

Use cases: agent-building

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

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What's inside

Skill name

context-engineering

Description

Pack agent context efficiently — progressive disclosure, trim thresholds, lost-in-the-middle ordering, session handoffs. Use when managing long contexts or designing skills/rules.

License

MIT

Instructions

36 lines in SKILL.md · view on GitHub

# Context Engineering

## Overview

Context is a scarce, ordered resource. Pack only what the current step needs.

## Process

1. **Hierarchy:** always-on (tiny) → on-demand skill → retrieved files → tool outputs.
2. **Ordering:** stable instructions first; volatile user/task last (cache-friendly).
3. **Trim at ~75%:** summarize or restart with a handoff checklist.
4. **Protect:** decisions, IDs, error text, security findings — do not drop.
5. **Cut first:** narration, duplicate file bodies, lockfiles, build noise.

## Lost-in-the-middle

Place critical constraints at the start and end of the packed context; avoid burying them mid-dump.

## Handoff template

```
Goal:
Done:
Open:
Files:
Commands to re-run:
Risks:
```

## Verification

- [ ] Always-on rules remain short
- [ ] No full-repo dump
- [ ] Handoff is restartable

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Last commit (this folder)

Sep 17, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

License

MIT

Repository

github.com/julienlhk/optima

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

GitHubgithub-graphql