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-pack)<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco-pack"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco-pack.svg" alt="Measured on agentmods" 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 | $0.00033 | $0.00422 |
| Opus 5 | $0.00016 | $0.00211 |
| Sonnet 5 | $0.00007 | $0.00084 |
| Haiku 4.5 | $0.00003 | $0.00042 |
Grade A, and why
cco-pack 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 4d 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
Smart Context Pack
When the user runs /cco-pack or asks "what files do I need for X", build a curated, token-budget-aware list of files to load instead of guessing or reading the whole repo.
How to use
node ${CLAUDE_PLUGIN_ROOT}/src/smart-pack.js "the task description"
Or for the current git state without a description:
node ${CLAUDE_PLUGIN_ROOT}/src/smart-pack.js
Or to feed it back into automation as JSON:
node ${CLAUDE_PLUGIN_ROOT}/src/smart-pack.js --json "..."
How it ranks files
Priority order:
- Mentioned in prompt — explicit file paths or recognisable names → relevance 100
- Modified in git working tree → 85
- Historically useful in this project (high confidence, edited often) → up to 70
- Keyword match against the task → up to 70
For each file the pack also suggests offset / limit — pointing at the structurally relevant section based on file landmarks (function/class declarations near task keywords).
Token budget awareness
Pack stops adding files once it would exceed 25% of the user's effective context budget. The budget itself respects the configured model (e.g. the full 1M window for opus-5 — 1M is standard on Opus, no premium tier).
Presentation
After running, present the list to the user and offer to:
- Read the top N files with the suggested offset/limit
- Save the set as a template (
/cco-templates create <name>) - Drop low-relevance items if they want a tighter pack
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.
- 4d ago Changed ed36ce679b88
- 8d ago First seen · 48 lines · 33 tokens per session scan A 0310b562b546
cco-pack is a skill published in the GitHub repository egorfedorov/claude-context-optimizer (107 stars, last pushed 6d ago), licensed MIT. It adds 33 tokens to every session and 422 once invoked, about $0.0002 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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