Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add egorfedorov/claude-context-optimizer/plugin install claude-context-optimizerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-claudemd)<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-claudemd"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-claudemd/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-claudemd"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-claudemd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00020 | $0.00227 |
| Opus 5 | $0.00010 | $0.00113 |
| Sonnet 5 | $0.00004 | $0.00045 |
| Haiku 4.5 | $0.00002 | $0.00023 |
Grade A, and why
cco-claudemd scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
CLAUDE.md Analyzer
Analyze CLAUDE.md files in the current project for token bloat and optimization opportunities.
Run the analyzer:
node ${CLAUDE_PLUGIN_ROOT}/src/claudemd-analyzer.js "${CWD}"
Present the output to the user. The analyzer checks for:
- Overall size — files over 2K tokens get flagged
- Large sections — sections over 1K tokens
- Duplicate lines — repeated content
- Verbose patterns — "please make sure to", "it is important that", etc.
- Long code blocks — examples over 20 lines
- Excessive whitespace — empty lines eating tokens
For each issue found, explain the savings potential and suggest a concrete fix.
If the user wants to apply fixes, help them edit the CLAUDE.md directly using the Edit tool.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 29 lines · 20 tokens per session scan A 9bbbaffea02a
cco-claudemd is a skill published in the GitHub repository egorfedorov/claude-context-optimizer (110 stars, last pushed 8d ago), licensed MIT. It adds 20 tokens to every session and 227 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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