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.
npx agentmods add skills/darrenhinde/openagentscontrol/context-managernpx skills add darrenhinde/OpenAgentsControl --skill context-managergit clone --depth 1 https://github.com/darrenhinde/OpenAgentsControlWrote 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/darrenhinde/openagentscontrol/context-manager)<a href="https://agentmods.dev/skills/darrenhinde/openagentscontrol/context-manager"><img src="https://agentmods.dev/badge/skills/darrenhinde/openagentscontrol/context-manager.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 | $0.00027 | $0.02979 |
| Opus 5 | $0.00014 | $0.01489 |
| Sonnet 5 | $0.00005 | $0.00596 |
| Haiku 4.5 | $0.00003 | $0.00298 |
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 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.
How it starts
The opening of the file, as written. The whole thing — 569 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Context Manager Skill
Purpose: Comprehensive context management operations with clear guidance, lazy loading, and safe operations for discovering, organizing, and maintaining project context.
What I Do
I provide 8 powerful operations for managing context:
- DISCOVER - Find context files by topic or path
- FETCH - Get external documentation from libraries
- HARVEST - Extract context from summary files
- EXTRACT - Pull specific information from context
- COMPRESS - Reduce large file sizes
- ORGANIZE - Restructure context by concern
- CLEANUP - Remove stale or temporary files
- PROCESS - Guided workflow for context operations
Quick Start
1. Discover Context
bash .opencode/skills/context-manager/router.sh discover authentication
Finds all context files related to authentication patterns.
2. Fetch External Documentation
bash .opencode/skills/context-manager/router.sh fetch "Drizzle ORM" "modular schemas"
Retrieves live documentation from external libraries.
3. Harvest Context
bash .opencode/skills/context-manager/router.sh harvest ANALYSIS.md
Extracts key concepts from summary files into permanent context.
4. Extract Information
bash .opencode/skills/context-manager/router.sh extract code-quality.md "naming conventions"
Pulls specific information from context files.
5. Compress Files
bash .opencode/skills/context-manager/router.sh compress .opencode/context/ 100KB
Reduces large context files to save space.
6. Organize Context
bash .opencode/skills/context-manager/router.sh organize .opencode/context/
Restructures context by concern for better organization.
7. Cleanup Stale Files
bash .opencode/skills/context-manager/router.sh cleanup .tmp/ 7
Removes temporary or old files (older than 7 days).
8. Guided Workflow
bash .opencode/skills/context-manager/router.sh process "organize authentication context" .opencode/context/
Step-by-step guidance for complex context operations.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 First seen · 569 lines · 27 tokens per session scan A 1c2a055c8a7f
context-manager is a skill published in the GitHub repository darrenhinde/OpenAgentsControl (4,820 stars, last pushed yesterday), licensed MIT. It adds 27 tokens to every session and 2,979 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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