Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add egorfedorov/claude-context-optimizer --skill cco-cleangit clone --depth 1 https://github.com/egorfedorov/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-clean)<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-clean"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-clean.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00011 | $0.00192 |
| Opus 5 | $0.00005 | $0.00096 |
| Sonnet 5 | $0.00002 | $0.00038 |
| Haiku 4.5 | $0.00001 | $0.00019 |
Grade A, and why
cco-clean 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 8d 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
Clean Context Optimizer Data
The user wants to clean up tracking data. Parse $ARGUMENTS:
- If
--reset-all: Delete all data in~/.claude-context-optimizer/and confirm - If
--sessions-older-than N: Delete session files older than N days - If no arguments: Show current data size and ask what to clean
Run to check data size:
du -sh ~/.claude-context-optimizer/ 2>/dev/null && find ~/.claude-context-optimizer/sessions/ -name "*.json" 2>/dev/null | wc -l
For cleanup, delete the appropriate files and confirm what was removed.
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.
- 8d ago First seen · 23 lines · 11 tokens per session scan A d9ee168cc4ad
cco-clean is a skill published in the GitHub repository egorfedorov/claude-context-optimizer (107 stars, last pushed 6d ago), licensed MIT. It adds 11 tokens to every session and 192 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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