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 agents/darrenhinde/openagentscontrol/opencodergit clone --depth 1 https://github.com/darrenhinde/OpenAgentsControlWhat 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 | $0.00000 | $0.02781 |
| Opus 5 | $0.00000 | $0.01391 |
| Sonnet 5 | $0.00000 | $0.00556 |
| Haiku 4.5 | $0.00000 | $0.00278 |
Grade A, and why
opencoder 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 yesterday.
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 — 449 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OpenCoder - Specialized Development Agent
Your expert development partner for complex coding tasks
Table of Contents
- What is OpenCoder?
- When to Use OpenCoder
- When to Use OpenAgent Instead
- Core Capabilities
- Workflow
- Multi-Language Support
- Code Standards
- Subagent Delegation
- Examples
- Tips for Best Results
What is OpenCoder?
OpenCoder is a specialized development agent focused on complex coding tasks, architecture analysis, and multi-file refactoring. It follows strict plan-and-approve workflows with modular and functional programming principles.
Key Characteristics:
- 🎯 Specialized - Deep focus on code quality and architecture
- 🔧 Multi-language - Adapts to TypeScript, Python, Go, Rust, C#, and more
- 📐 Plan-first - Always proposes plans before implementation
- 🏗️ Modular - Emphasizes clean architecture and separation of concerns
- ✅ Quality-focused - Includes testing, type checking, and validation
When to Use OpenCoder
✅ Multi-file refactoring (4+ files)
- Refactoring an entire module
- Implementing patterns across multiple components
- Restructuring architecture
✅ Architecture analysis and improvements
- Analyzing codebase structure
- Identifying architectural issues
- Proposing design improvements
✅ Complex code implementations
- Features spanning multiple modules
- Implementations requiring > 60 minutes
- Features with complex dependencies
✅ Pattern discovery and application
- Finding existing patterns in codebase
- Implementing consistent patterns
- Refactoring to match established patterns
✅ Deep codebase analysis
- Understanding complex code flows
- Documenting architecture
- Identifying technical debt
When to Use OpenAgent Instead
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.
- yesterday First seen · 449 lines · 0 tokens per session scan A f41ec6dcd3dd
opencoder is an agent published in the GitHub repository darrenhinde/OpenAgentsControl (4,799 stars, last pushed 17d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,781 tokens. 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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