Caveman Stats
JuliusBrussee/caveman
Show recorded output and cache-read token usage and mode attribution for the current Claude Code session, or locate the host's native usage report.
Show ContextShield status and waste protection stats; suggest or apply .contextignore rules from historical waste
MITAuto-check passed
Install Cco Shield
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-shield --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/egorfedorov/claude-context-optimizer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/cco-shield .claude/skills/cco-shield && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "cco-shield" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shield into .claude/skills/cco-shield/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-shield", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shieldType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-shield --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/egorfedorov/claude-context-optimizer.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/cco-shield .agents/skills/cco-shield && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cco-shield" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shield into .agents/skills/cco-shield/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-shield", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-shield --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/egorfedorov/claude-context-optimizer.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/cco-shield .cursor/skills/cco-shield && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "cco-shield" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shield into .cursor/skills/cco-shield/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-shield", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/egorfedorov/claude-context-optimizer.git --path skills/cco-shield--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-shield --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/egorfedorov/claude-context-optimizer.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/cco-shield .gemini/skills/cco-shield && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "cco-shield" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shield into .gemini/skills/cco-shield/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-shield", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install egorfedorov/claude-context-optimizer cco-shieldInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/egorfedorov/claude-context-optimizer.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/cco-shield .github/skills/cco-shield && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "cco-shield" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shield into .github/skills/cco-shield/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-shield", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-shield --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/egorfedorov/claude-context-optimizer.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/cco-shield .opencode/skills/cco-shield && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "cco-shield" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-shield into .opencode/skills/cco-shield/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-shield", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
cco-shield- GitHub stars
- 114
- Token cost
- ~457 tokens
- SKILL.md length
- 170 words
- Files
- 1
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- MIT
At a glance
Show ContextShield status and waste protection stats; suggest or apply .contextignore rules from historical waste
- Works in 4 steps: ContextShield Status: Active (it's… → Protected Files: List files with 3+… → Tokens Saved: Estimate based on waste… → …
- SKILL.md covers Subcommands and Status report (default)
- Calls node
What it does
Cco Shield is an agent skill from egorfedorov/claude-context-optimizer. Show ContextShield status and waste protection stats; suggest or apply .contextignore rules from historical waste
Its SKILL.md is about 460 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Claude Code plugin that tracks token usage, identifies wasted context, and saves 30-50% on API costs. Heatmaps, ROI reports, budget alerts, efficiency scores, git-aware… The licence is MIT.
Example prompts
- “/cco-shield”
Requirements
- Pre-approved tools (allowed-tools): Bash(node ${CLAUDE_PLUGIN_ROOT}/src/context-shield.js:*), Bash(node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js:*), Read
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- ContextShield Status: Active (it's always active as a PreToolUse hook)
- Protected Files: List files with 3+ waste sessions — these trigger warnings before Read
- Tokens Saved: Estimate based on waste history (files that would have been read without shield)
- Co-occurrence Groups: Files that are usually edited together
What it can do on your machine
Read from SKILL.md and the folder at commit f6f20ee. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
Bash(node ${CLAUDE_PLUGIN_ROOT}/src/context-shield.js:*)Bash(node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js:*)Read
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
node
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Cco Shield loads about 457 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 170 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from egorfedorov/claude-context-optimizer at commit f6f20ee, republished under its MIT licence (© egorfedorov). 170 words, ~457 tokens.
Download SKILL.mdSave it as
.claude/skills/cco-shield/SKILL.md (or your agent's skills folder).- name
- cco-shield
- description
- Show ContextShield status and waste protection stats; suggest or apply .contextignore rules from historical waste
- allowed-tools
- Bash(node ${CLAUDE_PLUGIN_ROOT}/src/context-shield.js:*), Bash(node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js:*), Read
- license
- MIT
ContextShield Status
Show the user the current ContextShield protection status and historical waste prevention stats.
Subcommands
If the user asked for suggestions (/cco-shield suggest) or to apply them
(/cco-shield apply), run instead:
node ${CLAUDE_PLUGIN_ROOT}/src/context-shield.js suggest # preview .contextignore candidates
node ${CLAUDE_PLUGIN_ROOT}/src/context-shield.js apply # append them to ./.contextignoresuggest lists files wasted in 3+ sessions as ready-to-use .contextignore
patterns with per-session token savings. apply appends them (deduped against
existing rules) so those reads are blocked permanently. Show the output as-is.
Status report (default)
Run the following command to get pattern data:
node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js patternsFrom the patterns data, present:
- ContextShield Status: Active (it's always active as a PreToolUse hook)
- Protected Files: List files with 3+ waste sessions — these trigger warnings before Read
- Tokens Saved: Estimate based on waste history (files that would have been read without shield)
- Co-occurrence Groups: Files that are usually edited together
Format as a clean status report. If no pattern data exists yet, tell the user: "ContextShield is warming up! It learns from your usage patterns and will start giving you smart suggestions after a few sessions."
End the report with:
ContextShield runs automatically on every Read. No configuration needed.© egorfedorov, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/cco-shield of egorfedorov/claude-context-optimizer.
Open the folder on GitHubat commit f6f20ee
Compare with similar skills
Cco Shield next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Cco Shield this skillegorfedorov/claude-context-optimizer | 114 | — | ~457 | Automated safety check: Pass | MIT | |
| Caveman StatsJuliusBrussee/caveman | 111k | — | ~491 | Automated safety check: Pass | Apache-2.0 | |
| Suggestion Boxpaperclipai/paperclip | 99k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Suggest Automationsn8n-io/n8n | 207k | — | ~2k | Automated safety check: Pass | Custom licence | |
| Statsagenticnotetaking/arscontexta | 3.5k | — | ~3.1k | Automated safety check: Notes | MIT | |
| Ctx Statsmksglu/context-mode | 26k | — | ~290 | Automated safety check: Pass | Custom licence |
Similar skills
Suggestion Box
paperclipai/paperclip
Quietly suggest a concrete improvement after observing material, generalizable friction in agent work.
- Official
Suggest Automations
n8n-io/n8n
Offer the three most common automations for a user as a single-choice card, from your own knowledge of their team and their apps, then build the one they choose once they confirm, or offer more.
Stats
agenticnotetaking/arscontexta
Show vault statistics and knowledge graph metrics. An agent skill from agenticnotetaking/arscontexta.
Ctx Stats
mksglu/context-mode
Show how much context window context-mode saved this session.
Cco Review
alirezarezvani/claude-skills
/cs:cco-review <plan — Retention-obsessed Chief Customer Officer interrogation of any plan that touches customer retention, segmentation, CS team sizing, or CS team hiring.
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Cco Budget
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Cco Config
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View and tune CCO's behavior thresholds — re-read warnings, cache staleness, prompt-coach length bands, and the /cco-pack budget cap
Cco Patterns
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Share learned file patterns across a team — export an anonymized digest of what's usually waste/useful/co-edited, and import a teammate's so a fresh clone benefits day one
Cco Task
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Organize work by task, track tokens/cost per task, and keep a small patchable execution state that is re-injected after /compact (SKILL.state-style) — start a task, patch its state, list tasks, or…
Questions about Cco Shield
What does Cco Shield do?
Show ContextShield status and waste protection stats; suggest or apply .contextignore rules from historical waste. Cco Shield is an agent skill from egorfedorov/claude-context-optimizer.
How do I install Cco Shield in Claude Code?
Run `npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a claude-code`. Or copy the skill folder (skills/cco-shield in egorfedorov/claude-context-optimizer) into .claude/skills/cco-shield in your project. Claude Code loads it when a task matches its description.
How do I install Cco Shield in Codex?
Run `npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a codex`. Or copy the skill folder (skills/cco-shield in egorfedorov/claude-context-optimizer) into .agents/skills/cco-shield in your project. Codex loads it when a task matches its description.
Can I use Cco Shield in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add egorfedorov/claude-context-optimizer --skill cco-shield -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cco-shield, .gemini/skills/cco-shield, .github/skills/cco-shield and .opencode/skills/cco-shield in your project.
What does Cco Shield need to run?
Going by SKILL.md and its folder, Cco Shield needs the command-line tools its instructions call (node). Its frontmatter pre-approves these tools: Bash(node ${CLAUDE_PLUGIN_ROOT}/src/context-shield.js:*), Bash(node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js:*), Read.
Does Cco Shield access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Cco Shield safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Cco Shield use?
Cco Shield is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Cco Shield use?
About 457 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Cco Shield?
Skills that share tags, products or a category with Cco Shield: Caveman Stats (JuliusBrussee/caveman, 111k stars), Suggestion Box (paperclipai/paperclip, 99k stars), Suggest Automations (n8n-io/n8n, 207k stars) and Stats (agenticnotetaking/arscontexta, 3.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cco Shield?
egorfedorov (a GitHub user) maintains it in egorfedorov/claude-context-optimizer, which has 114 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on September 30, 2026.
Source: egorfedorov/claude-context-optimizer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.