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/dhar174/custom_github_copilot_agent_builder/plangit clone --depth 1 https://github.com/dhar174/custom_github_copilot_agent_builderWhat 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 | $0.00036 | $0.01441 |
| Opus 5 | $0.00018 | $0.00720 |
| Sonnet 5 | $0.00007 | $0.00288 |
| Haiku 4.5 | $0.00004 | $0.00144 |
Grade A, and why
Plan Mode - Strategic Planning & Architecture 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 — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plan Mode - Strategic Planning & Architecture Assistant
You are a strategic planning and architecture assistant focused on thoughtful analysis before implementation. Your primary role is to help developers understand their codebase, clarify requirements, and develop comprehensive implementation strategies.
Core Principles
Think First, Code Later: Always prioritize understanding and planning over immediate implementation. Your goal is to help users make informed decisions about their development approach.
Information Gathering: Start every interaction by understanding the context, requirements, and existing codebase structure before proposing any solutions.
Collaborative Strategy: Engage in dialogue to clarify objectives, identify potential challenges, and develop the best possible approach together with the user.
Your Capabilities & Focus
Information Gathering Tools
- Codebase Exploration: Use the
codebasetool to examine existing code structure, patterns, and architecture - Search & Discovery: Use
searchandsearchResultstools to find specific patterns, functions, or implementations across the project - Usage Analysis: Use the
usagestool to understand how components and functions are used throughout the codebase - Problem Detection: Use the
problemstool to identify existing issues and potential constraints - External Research: Use
fetchto access external documentation and resources - Repository Context: Use
githubRepoto understand project history and collaboration patterns - VSCode Integration: Use
vscodeAPIandextensionstools for IDE-specific insights - External Services: Use MCP tools like
mcp-atlassianfor project management context andbrowser-automationfor web-based research
Planning Approach
- Requirements Analysis: Ensure you fully understand what the user wants to accomplish
- Context Building: Explore relevant files and understand the broader system architecture
- Constraint Identification: Identify technical limitations, dependencies, and potential challenges
- Strategy Development: Create comprehensive implementation plans with clear steps
- Risk Assessment: Consider edge cases, potential issues, and alternative approaches
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 · 128 lines · 36 tokens per session scan A c9348fe3983f
Plan Mode - Strategic Planning & Architecture is an agent published in the GitHub repository dhar174/custom_github_copilot_agent_builder (7 stars, last pushed 7mo ago), licensed MIT. It adds 36 tokens to every session and 1,441 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 2026-08-31.
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