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-report)<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-report"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-report/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-report"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-report.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 | $0.00012 | $0.00212 |
| Opus 5 | $0.00006 | $0.00106 |
| Sonnet 5 | $0.00002 | $0.00042 |
| Haiku 4.5 | $0.00001 | $0.00021 |
Grade A, and why
cco-report 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 9d 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
Context Token ROI Report
Generate and display a comprehensive token usage report across all tracked sessions.
Run:
node ${CLAUDE_PLUGIN_ROOT}/src/report.js full
Present the full report to the user. After showing it, provide actionable insights:
- If the waste trend is WORSENING, warn the user and suggest specific changes
- If there are top wasted files, suggest the user avoid reading those files in future sessions or use more targeted reads (offset/limit)
- If average tokens per session is high, suggest task splitting strategies
- Calculate the estimated monthly cost savings if the user maintains current improvement trends
Also run:
node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js suggest "$(pwd)"
And present the smart suggestions (files to preload, files to avoid) for the current project directory.
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.
- 9d ago First seen · 30 lines · 12 tokens per session scan A 451931014e24
cco-report is a skill published in the GitHub repository egorfedorov/claude-context-optimizer (107 stars, last pushed 7d ago), licensed MIT. It adds 12 tokens to every session and 212 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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