MCP Server Builder
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Health check for the context-optimizer plugin install — verifies versions, hooks, data dir, model config, and reports any issues
Install Cco Doctor
$ npx skills add egorfedorov/claude-context-optimizer --skill cco-doctor -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-doctor --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-doctor .claude/skills/cco-doctor && 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-doctor" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-doctor into .claude/skills/cco-doctor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-doctor", 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-doctorType 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-doctor -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-doctor --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-doctor .agents/skills/cco-doctor && 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-doctor" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-doctor into .agents/skills/cco-doctor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-doctor", 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-doctor -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-doctor --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-doctor .cursor/skills/cco-doctor && 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-doctor" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-doctor into .cursor/skills/cco-doctor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-doctor", 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-doctor--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-doctor -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install egorfedorov/claude-context-optimizer cco-doctor --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-doctor .gemini/skills/cco-doctor && 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-doctor" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-doctor into .gemini/skills/cco-doctor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-doctor", 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-doctorInstalls 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-doctor -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-doctor .github/skills/cco-doctor && 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-doctor" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-doctor into .github/skills/cco-doctor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-doctor", 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-doctor -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-doctor --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-doctor .opencode/skills/cco-doctor && 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-doctor" agent skill from https://github.com/egorfedorov/claude-context-optimizer/tree/main/skills/cco-doctor into .opencode/skills/cco-doctor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cco-doctor", 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-doctor- GitHub stars
- 114
- Token cost
- ~364 tokens
- SKILL.md length
- 154 words
- Files
- 1
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- MIT
At a glance
Health check for the context-optimizer plugin install — verifies versions, hooks, data dir, model config, and reports any issues
- Agent Workflows work in your project
- SKILL.md covers How to use, What it checks and Presentation
- Calls node and npm
What it does
Cco Doctor is an agent skill from egorfedorov/claude-context-optimizer. Health check for the context-optimizer plugin install — verifies versions, hooks, data dir, model config, and reports any issues
Its SKILL.md is about 360 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows. It works with npm. 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.
When your agent uses it
- Agent Workflows work in your project
Example prompts
- “/cco-doctor”
Requirements
- Pre-approved tools (allowed-tools): Bash(node ${CLAUDE_PLUGIN_ROOT}/src/doctor.js:*), Read
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/doctor.js:*)Read
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
nodenpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.
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 Doctor loads about 364 tokens when it runs. Until then it costs about 35 tokens; SKILL.md has 154 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). 154 words, ~364 tokens.
Download SKILL.mdSave it as
.claude/skills/cco-doctor/SKILL.md (or your agent's skills folder).- name
- cco-doctor
- description
- Health check for the context-optimizer plugin install — verifies versions, hooks, data dir, model config, and reports any issues
- allowed-tools
- Bash(node ${CLAUDE_PLUGIN_ROOT}/src/doctor.js:*), Read
- license
- MIT
CCO Doctor
When the user runs /cco-doctor or reports the plugin "isn't working", run a quick health check.
How to use
Standard run (fast — under 1s):
node ${CLAUDE_PLUGIN_ROOT}/src/doctor.jsWith test suite (slower — runs all unit tests):
node ${CLAUDE_PLUGIN_ROOT}/src/doctor.js --testsWhat it checks
- Plugin manifest and
package.jsonexist - Versions are in sync (
plugin.jsonandpackage.json) hooks.jsonis valid JSON with all expected event types- All hook scripts present in
src/ - Data directory
~/.claude-context-optimizer/is writable patterns.jsonsize is reasonable- Global stats file is parseable
- User config has sane model + budget for the chosen model
- Node version meets the >=18 requirement
Presentation
Translate the doctor output into plain language. If anything is fail, walk the user through the fix:
- versions out of sync →
npm run sync-version - patterns.json too big →
/cco-clean - budget > model window →
/cco-budget set <smaller>or pick a 1M-context model (e.g.opus-5.5) - node too old → upgrade Node
If everything is pass, confirm "плагин в порядке, текущая версия Х.Y.Z" and stop.
© 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-doctor of egorfedorov/claude-context-optimizer.
Open the folder on GitHubat commit f6f20ee
Compare with similar skills
Cco Doctor 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 Doctor this skillegorfedorov/claude-context-optimizer | 114 | — | ~364 | Automated safety check: Pass | MIT | |
| MCP Server BuildershareAI-lab/learn-claude-code | 78k | 4 repos | ~1.2k | Automated safety check: Pass | MIT | |
| CodeGraph Agent Evalcolbymchenry/codegraph | 74k | — | ~950 | Automated safety check: Pass | MIT | |
| Mem0 CLI Memory Commandsmem0ai/mem0 | 67k | — | ~2k | Automated safety check: Notes | Apache-2.0 | |
| Orca Run Replayiflytek/skillhub | 5.2k | 4 repos | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Helmor Bump Vendorsdohooo/helmor | 1.3k | — | ~2.1k | Automated safety check: Pass | Apache-2.0 |
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Adds, searches, lists, updates and deletes memories on the Mem0 platform from the terminal with the mem0 command, including a JSON mode built for agents.
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Answers questions about a past agent run from its recording, using causal graphs and replay, instead of reconstructing events from memory.
Helmor Bump Vendors
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More from egorfedorov/claude-context-optimizer
All 13 skills in this repoSmart Loader
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Automatically suggests optimal files to preload based on the user's task description and historical context patterns.
Cco
egorfedorov/claude-context-optimizer
Context Control Center — one screen for budget, $ spent, tokens saved, waste, last prompt grade, the active task, and ready-to-run optimization actions
Cco Budget
egorfedorov/claude-context-optimizer
Configure token budget limits, auto-compact settings, and view current budget status (model-aware — Claude 5 lineup, Opus 5.5 default fallback, full 1M context at standard price)
Cco Config
egorfedorov/claude-context-optimizer
View and tune CCO's behavior thresholds — re-read warnings, cache staleness, prompt-coach length bands, and the /cco-pack budget cap
Cco Patterns
egorfedorov/claude-context-optimizer
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 Shield
egorfedorov/claude-context-optimizer
Show ContextShield status and waste protection stats; suggest or apply .contextignore rules from historical waste
Related
Works with
Categories
Questions about Cco Doctor
What does Cco Doctor do?
Health check for the context-optimizer plugin install — verifies versions, hooks, data dir, model config, and reports any issues. Cco Doctor is an agent skill from egorfedorov/claude-context-optimizer.
When should I use Cco Doctor?
Cco Doctor fits situations like: agent Workflows work in your project.
How do I install Cco Doctor in Claude Code?
Run `npx skills add egorfedorov/claude-context-optimizer --skill cco-doctor -a claude-code`. Or copy the skill folder (skills/cco-doctor in egorfedorov/claude-context-optimizer) into .claude/skills/cco-doctor in your project. Claude Code loads it when a task matches its description.
How do I install Cco Doctor in Codex?
Run `npx skills add egorfedorov/claude-context-optimizer --skill cco-doctor -a codex`. Or copy the skill folder (skills/cco-doctor in egorfedorov/claude-context-optimizer) into .agents/skills/cco-doctor in your project. Codex loads it when a task matches its description.
Can I use Cco Doctor 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-doctor -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-doctor, .gemini/skills/cco-doctor, .github/skills/cco-doctor and .opencode/skills/cco-doctor in your project.
What does Cco Doctor need to run?
Going by SKILL.md and its folder, Cco Doctor needs the command-line tools its instructions call (node and npm). Its frontmatter pre-approves these tools: Bash(node ${CLAUDE_PLUGIN_ROOT}/src/doctor.js:*), Read.
Does Cco Doctor access the network?
SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Cco Doctor 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 Doctor use?
Cco Doctor 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 Doctor use?
About 364 tokens (SKILL.md is roughly 1.5k 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 Doctor?
Skills that share tags, products or a category with Cco Doctor: MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), CodeGraph Agent Eval (colbymchenry/codegraph, 74k stars), Mem0 CLI Memory Commands (mem0ai/mem0, 67k stars) and Orca Run Replay (iflytek/skillhub, 5.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cco Doctor?
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.