skill CX Codex

ctx-stats — Claude Code skill: session context savings stats

Q: How do I install ctx-stats in Claude Code?

Run `npx skills add mksglu/context-mode --skill ctx-stats -a claude-code`. The skill file lands at `~/.claude/skills/ctx-stats/SKILL.md`.

Q: What does ctx-stats do?

It calls the `mcp__context-mode__ctx_stats` MCP tool and shows token consumption, the context savings ratio and a per-tool breakdown for the current session.

Reports how much context window context-mode saved in the current session: token use, savings ratio and a per-tool breakdown.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓

npx skills add mksglu/context-mode --skill ctx-stats -a claude-code

Open on GitHub

What ctx-stats does

The skill calls the mcp__context-mode__ctx_stats MCP tool with no arguments and returns tables covering token consumption, the savings ratio and a breakdown per tool. It is read-only. There is no way to reset or wipe anything from it. Clearing the knowledge base is a separate job, handled by ctx_purge(confirm: true) through /context-mode:ctx-purge.

The instructions tell the agent to paste the tool output into the reply in full, tables and all, without summarising or collapsing it, then add a single line naming the headline savings figure. If context-mode has not been called yet in that session, you get a note saying so instead of tables.

Without the context-mode MCP server installed and connected, the skill has nothing to call — ctx_stats is one of its tools. The skill installs separately from the server, so check the server is already configured for your agent first.

What it helps with

see token spend for the current session
check what share of data stayed in the sandbox
spot the tool eating the most context
confirm context-mode is actually running
decide whether to clear the knowledge base with ctx_purge

Example prompts for the agent

Show me the context savings stats for this session
How many tokens did context-mode save, broken down by tool?
Print the full ctx_stats tables, don't summarise them

How to install ctx-stats

1Skills CLI (Vercel)

npx skills add mksglu/context-mode --skill ctx-stats -a claude-code

2Manually: put the files in place

~/.claude/skills/ctx-stats/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/ctx-stats/

1Skills CLI (Vercel)

npx skills add mksglu/context-mode --skill ctx-stats -a codex

2Manually: put the files in place

.agents/skills/ctx-stats/SKILL.md

For all projects use ~/.agents/skills/

1Skills CLI (Vercel)

npx skills add mksglu/context-mode --skill ctx-stats -a cursor

2Manually: put the files in place

.cursor/skills/ctx-stats/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install mksglu/context-mode ctx-stats

2Manually: put the files in place

.github/skills/ctx-stats/SKILL.md

1Skills CLI (Vercel)

npx skills add mksglu/context-mode --skill ctx-stats -a gemini-cli

2Platform CLI

gemini skills install https://github.com/mksglu/context-mode --path skills/ctx-stats

Manually: put the files in place

.devin/skills/ctx-stats/SKILL.md

The legacy .windsurf/skills/ path still works

Skills CLI (Vercel)

npx skills add mksglu/context-mode --skill ctx-stats -a opencode

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about ctx-stats

How do I install ctx-stats in Claude Code?

Run npx skills add mksglu/context-mode --skill ctx-stats -a claude-code. The skill file lands at ~/.claude/skills/ctx-stats/SKILL.md.

What does ctx-stats do?

It calls the mcp__context-mode__ctx_stats MCP tool and shows token consumption, the context savings ratio and a per-tool breakdown for the current session.

Can ctx-stats clear the knowledge base?

No, it only reads stats. Wiping indexed content is done with ctx_purge(confirm: true) or the /context-mode:ctx-purge command.

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