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)<a href="https://agentmods.dev/skills/egorfedorov/claude-context-optimizer/cco"><img src="https://agentmods.dev/badge/skills/egorfedorov/claude-context-optimizer/cco.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 | $0.00439 |
| Opus 5 | $0.00016 | $0.00219 |
| Sonnet 5 | $0.00007 | $0.00088 |
| Haiku 4.5 | $0.00003 | $0.00044 |
Grade A, and why
cco 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 7d 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 Control Center
The all-in-one view of the current session. Show the user the live board, then the per-file heatmap if they want detail.
1. Show the board
node ${CLAUDE_PLUGIN_ROOT}/src/dashboard.js board
This renders, in one screen:
- Budget — % of the effective context window used + $ spent this session
- Saved — tokens the Read Cache blocked → the effectiveness multiplier (e.g. "1.4x")
- Waste — cold context (read but never edited) you can drop to free budget
- Prompt — grade of the last prompt (from Prompt Coach)
- Task — the active task and its token/$ cost (per-task attribution)
- Actions — concrete next steps: what to drop →
/compact, what to/cco-pack
Present the board as-is. Then, based on what it shows:
- If an action line suggests dropping cold files, offer to run
/compact. - If no task is active, suggest
/cco-task add "<what they're working on>"so the board can attribute tokens per task. - If the prompt grade is low (C/D/F), suggest
/cco-coach.
2. (Optional) per-file heatmap
If the user wants the file-by-file breakdown:
node ${CLAUDE_PLUGIN_ROOT}/src/tracker.js heatmap
Highlight files read but never used (waste), files that were edited (high-value), and the total token usage / waste percentage.
If there is no data yet, tell the user: "No data in this session yet — keep working. Reads, edits, prompts and cache savings are tracked automatically; run /cco again to see the board fill in."
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.
- 7d ago First seen · 47 lines · 33 tokens per session scan A 243f451ba560
cco is a skill published in the GitHub repository egorfedorov/claude-context-optimizer (105 stars, last pushed 4d ago), licensed MIT. It adds 33 tokens to every session and 439 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.
Other skills, from other repositories
alive:save
The human wants to checkpoint. Or: the stash has grown heavy — 5+ items, 30+ minutes, a natural pause in the work. The squirrel doesn't decide when to save. It surfaces the need and lets the human pull the trigger. Runs the full save protocol: confirms stash, writes log, updates state, generates projections…
alive:capture-context
Use when external content arrives in the session — emails, transcripts, screenshots, documents, files, or in-session research worth keeping. Also use when there's nothing obvious to capture — the skill checks 03Inbox/ for unrouted files and enters inbox scan mode. Stores raw content, routes to bundles, extracts tasks…
alive:session-history
Revive sessions (quick or heavy), browse, and search — 'what happened recently?', 'find the session where we discussed X', 'revive yesterday's session'. For single-session recall and multi-session browsing. If the human needs to merge multiple sessions into one working context or detect conflicts between parallel…
alive:load-context
The human mentions a walnut to work on, asks about a specific venture/experiment/project, or wants to check status — not just explicit 'load X'. Load the brief pack (3 files), resolve the people involved, check the active bundle — then surface one observation and ask what to work on. Context loads in tiers: walnut and…
alive:mine-for-context
Deep context extraction from source material. Creates reference bundles, builds extraction plans, tracks what's been extracted, and discovers new targets — people, subjects, patterns, connections. The archaeologist that turns raw sources into structured knowledge. Can be invoked by alive:session-history for targeted…
alive:my-context-graph
Render an interactive map of your world. Generates the world index from all walnut and bundle frontmatter, then produces a force-directed graph showing connections between walnuts, people, bundles, and tags. Opens in the browser.