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-roi)<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-roi"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-roi/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-roi"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-roi.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 | $0.00199 |
| Opus 5 | $0.00006 | $0.00100 |
| Sonnet 5 | $0.00002 | $0.00040 |
| Haiku 4.5 | $0.00001 | $0.00020 |
Grade A, and why
cco-roi 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
ROI Calculator
Calculate and display the return on investment from using Context Optimizer.
Parse $ARGUMENTS for sessions per day (default: 5).
Run:
node ${CLAUDE_PLUGIN_ROOT}/src/roi.js $ARGUMENTS
Present the ROI report to the user. Highlight:
- The effective context multiplier — how much more efficient their budget is
- Monthly and yearly dollar savings for their current model
- Team-level savings if they work in a team
- If data comes from real sessions, note how many sessions were analyzed
If the user has no session data yet, explain that the estimate uses industry averages (35% waste) and will become more accurate as they use CCO.
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 · 27 lines · 12 tokens per session scan A 416606d6bf08
cco-roi 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 199 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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