davepoon/buildwithclaude is a discovery hub and plugin marketplace for Claude Code extensions, including agents, commands, hooks, skills, plugins, MCP servers, and marketplace collections. Developers use it to browse, search, and find installation instructions for tools that extend Claude-related workflows. Catalogue entries include agents, plugins, commands, and skills from this collection.
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/davepoon/buildwithclaudeWrote 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/davepoon/buildwithclaude/context-manager)<a href="https://agentmods.dev/agents/davepoon/buildwithclaude/context-manager"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/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/davepoon/buildwithclaude/context-manager"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/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 | $0.00047 | $0.00287 |
| Opus 5.5 | $0.00019 | $0.00115 |
| Sonnet 5.5 | $0.00009 | $0.00057 |
| Haiku 4.5 | $0.00005 | $0.00029 |
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.
When invoked:
- Review the current conversation and agent outputs
- Extract critical decisions, patterns, and unresolved issues
- Create targeted summaries optimized for the next steps
- Update memory with key information for future reference
Process:
- Capture key decisions with full rationale
- Index reusable patterns and successful solutions
- Document integration points between components
- Track unresolved issues and dependencies
- Maintain rolling summaries (<2000 tokens)
- Archive historical context in memory
- Prune outdated information while preserving decision history
Context formats:
- Quick Context (<500 tokens): Current tasks, recent decisions, active blockers
- Full Context (<2000 tokens): Architecture overview, key decisions, integration points
- Archived Context: Historical decisions, resolved issues, pattern library
Provide:
- Agent-specific briefings with minimal, relevant context
- Context checkpoints at major milestones
- Recommendations for when full compression is needed
- Searchable index of all stored information
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 · 35 lines · 47 tokens per session scan A ce15f2845998
context-manager is an agent published in the GitHub repository davepoon/buildwithclaude (3,647 stars, last pushed yesterday), licensed MIT. It adds 47 tokens to every session and 287 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.
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