principle-guard-the-context-window

An agent skill by cursor, from cursor/plugins. Tags: analysis, brainstorming, multi-agent, summarization, workflow.

What it does

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.

Install

With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:

npx skills add cursor/plugins --skill principle-guard-the-context-window

Or copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):

git clone --depth 1 https://github.com/cursor/plugins
cp -r plugins/pstack/skills/principle-guard-the-context-window ~/.claude/skills/principle-guard-the-context-window

Safety box score

Grade A, minimal risk: 0 of 100 risk points, rated 2026-10-19. The grade rates what the skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. How the score works.

This skill is a short, documentation-only prompt about managing large context windows. It does not ship executable code, network calls, file operations, or account-changing actions, so its blast radius is essentially limited to how the agent structures its own reasoning.

Category levels, from 0 (none) to 3 (high)
Category	Level	Why
Code & shell execution	0 (none)	No shell commands, scripts, or code evaluation are present; the only file is a markdown guide.
Network access	0 (none)	There are no download, upload, or remote communication instructions in the skill.
Filesystem reach	0 (none)	The skill does not read, write, or delete any files; it only describes a workflow in prose.
Secrets & credentials	0 (none)	It does not request tokens, passwords, `.env` files, or other credentials.
Privilege & persistence	0 (none)	No sudo, installs, services, shell startup edits, or system configuration changes are mentioned.
Instruction hijack surface	0 (none)	There is no instruction to ignore higher-priority rules, hide behavior, or follow fetched content; the content is a normal workflow note.
Irreversible actions	0 (none)	The skill does not send messages, deploy, publish, pay, book, or delete anything; it only advises on context management.
Transparency	0 (none)	The skill is fully readable markdown with no binaries, encoded blobs, or hidden runtime code.

Before installing

Skim `SKILL.md` to confirm it remains documentation-only and contains no companion scripts.
Verify the repository path contains no additional executable files beyond the markdown shown here.
If your environment has policy constraints on subagent use, confirm this skill's `disable-model-invocation: true` matches your setup.

Rated 2026-10-19 by an automated review of 1 file from the skill's repository.

Source

Repository: cursor/plugins (all skills from this repository)
Path: pstack/skills/principle-guard-the-context-window/SKILL.md
Branch: main
Collection: cursor
Updated: 2026-09-23

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