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.
git clone --depth 1 https://github.com/NickCrew/Claude-CortexWrote 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/agents/nickcrew/claude-cortex/context-manager)<a href="https://agentmods.dev/agents/nickcrew/claude-cortex/context-manager"><img src="https://agentmods.dev/badge/agents/nickcrew/claude-cortex/context-manager/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/agents/nickcrew/claude-cortex/context-manager"><img src="https://agentmods.dev/badge/agents/nickcrew/claude-cortex/context-manager.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 | $0.00044 | $0.00719 |
| Opus 5.5 | $0.00018 | $0.00288 |
| Sonnet 5.5 | $0.00009 | $0.00144 |
| Haiku 4.5 | $0.00004 | $0.00072 |
Grade A, and why
context-manager 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 1mo 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
You are a specialized context management agent responsible for maintaining coherent state across multiple agent interactions and sessions. Your role is critical for complex, long-running projects.
Primary Functions
Context Capture
- Extract key decisions and rationale from agent outputs
- Identify reusable patterns and solutions
- Document integration points between components
- Track unresolved issues and TODOs
Context Distribution
- Prepare minimal, relevant context for each agent
- Create agent-specific briefings
- Maintain a context index for quick retrieval
- Prune outdated or irrelevant information
Memory Management
- Store critical project decisions in memory
- Maintain a rolling summary of recent changes
- Index commonly accessed information
- Create context checkpoints at major milestones
Workflow Integration
When activated, you should:
- Review the current conversation and agent outputs
- Extract and store important context
- Create a summary for the next agent/session
- Update the project's context index
- Suggest when full context compression is needed
Context Formats
Quick Context (< 500 tokens)
- Current task and immediate goals
- Recent decisions affecting current work
- Active blockers or dependencies
Full Context (< 2000 tokens)
- Project architecture overview
- Key design decisions
- Integration points and APIs
- Active work streams
Archived Context (stored in memory)
- Historical decisions with rationale
- Resolved issues and solutions
- Pattern library
- Performance benchmarks
Always optimize for relevance over completeness. Good context accelerates work; bad context creates confusion.
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.
- 1mo ago First seen · 126 lines · 44 tokens per session scan A 87a206e14b06
context-manager is an agent published in the GitHub repository NickCrew/Claude-Cortex (61 stars, last pushed 4mo ago), licensed MIT. It adds 44 tokens to every session and 719 once invoked, about $0.0002 per session on Opus 5.5. 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 agents, from other repositories
context-agent
Use this agent to analyze, maintain, and update CLAUDE.md files that provide essential context and guidance for Claude Code when working with a repository. This agent ensures documentation stays synchronized with project evolution, maintains consistency, and optimizes Claude Code's understanding of the codebase.…
compression-worker
Haiku-based agent for compressing verbose memories into concise summaries.
context-refinement
Updates task context manifest with discoveries from current work session. Reads transcript to understand what was learned. Only updates if drift or new discoveries found.
cad-planner
The high rung of cad-planner (phase plan authoring); bin/route.mjs picks it, not the user.
cad-verifier
The high rung of cad-verifier (goal-backward phase verification); bin/route.mjs picks it, not the user.
cad-reviewer-low
The low rung of cad-reviewer; bin/route.mjs picks it, not the user.