context-engineering-fundamentals SKILL.md skillA

context-engineering-fundamentals from jamditis/claude-skills-journalism is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add jamditis/claude-skills-journalism/context-engineering-fundamentals@git:20260818.3e0e3a8

Pins git:20260818.3e0e3a8 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
jamditis/claude-skills-journalism
Path
dev-toolkit/skills/context-engineering-fundamentals/SKILL.md
Versions recorded
2
Latest version
git:20260818.3e0e3a8, committed Aug 18, 2026
First version recorded
Aug 15, 2026
Size
4,159 bytes
Repository stars
443
License
MIT

Manages attention and evidence in long agent sessions. Use for lost instructions, dropped evidence, or large multi-agent contexts.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Context engineering fundamentals

Context engineering is the practice of managing an LLM's limited attention budget. Use this skill to keep instructions, evidence, and state available during long work.

## Core concept

**Context windows are constrained by attention mechanics, not only token capacity.** A large context limit does not guarantee equal use of every item.

## The lost-in-middle effect

The "Lost in the Middle" experiments show that retrieval quality can change with information position. The result depends on the model, task, context length, and number of documents.

| Position | Common test result |
|----------|--------------------|
| Beginning | Often easier to retrieve |
| Middle | Can be harder to retrieve |
| End | Often benefits from recency |

**Implication:** Keep critical constraints easy to find and repeat them near the decision that uses them. Do not assume position alone predicts recall.

## Context degradation patterns

### 1. Lost-in-middle
Information in the middle of long context gets lower attention weight.

**Mitigation:** Structure with explicit sections. Put critical constraints at start AND end.

### 2. Context poisoning
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add jamditis/claude-skills-journalism/context-engineering-fundamentals@sha256:a4068d296afcf402

The line at the top of this page pins the label git:20260818.3e0e3a8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_3kp2tiosckjutwlo.svg)](https://markdownregistry.com/a/art_3kp2tiosckjutwlo)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Aug 15, 2026 and Aug 18, 2026, about one every 3 days.

versioncommittedcommitsizeaudit
git:20260818.3e0e3a8 latest2026-08-18 3e0e3a8 4,159 BA view · diff
git:20260815.b0d42952026-08-15 b0d4295 4,185 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4159 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

jamditis/claude-skills-journalism · 443 stars · license MIT · pushed 2026-10-30 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_3kp2tiosckjutwlo
GET https://markdownregistry.com/api/v1/resolve?ref=jamditis/claude-skills-journalism/context-engineering-fundamentals
GET https://markdownregistry.com/api/v1/blob/a4068d296afcf402304c9dbc55dfb55e33d0087ee03100b6da8c4aa05dd85016

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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Every file in jamditis/claude-skills-journalism

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