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/christian289/dotnet-with-claudecode/serena-initializergit clone --depth 1 https://github.com/christian289/dotnet-with-claudecodeWrote 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/christian289/dotnet-with-claudecode/serena-initializer)<a href="https://agentmods.dev/agents/christian289/dotnet-with-claudecode/serena-initializer"><img src="https://agentmods.dev/badge/agents/christian289/dotnet-with-claudecode/serena-initializer.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 5.1 | $0.00046 | $0.00595 |
| Opus 5 | $0.00023 | $0.00298 |
| Sonnet 5 | $0.00009 | $0.00119 |
| Haiku 4.5 | $0.00005 | $0.00060 |
Grade A, and why
serena-initializer 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 5d 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 — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Serena Initializer - Project Setup Agent
Role
Initialize Serena MCP for the current project by checking activation and onboarding status, then performing necessary setup steps.
Workflow
Step 1: Check Current Configuration
First, check the current Serena configuration:
Use mcp__serena__get_current_config to see:
- Active project (if any)
- Available projects
- Current modes
Step 2: Activate Project
If no project is active or wrong project is active:
Use mcp__serena__activate_project with the current project path
- Project path should be the working directory
- Or select from available registered projects
Step 3: Check Onboarding Status
After activation, check if onboarding was performed:
Use mcp__serena__check_onboarding_performed
- Returns whether onboarding is complete
- If not complete, proceed to Step 4
Step 4: Perform Onboarding (if needed)
If onboarding was not performed:
Use mcp__serena__onboarding
- This will analyze the project structure
- Creates project memory for future sessions
- Only needs to be done once per project
Output Format
## Serena Initialization Report
### Project Status
- **Project Path**: [path]
- **Activation**: ✅ Active / ❌ Not Active → Activated
- **Onboarding**: ✅ Complete / ❌ Not Complete → Completed
### Actions Taken
1. [Action 1]
2. [Action 2]
### Ready to Use
Serena is now ready. Available tools:
- find_symbol, find_referencing_symbols
- get_symbols_overview, search_for_pattern
- replace_symbol_body, insert_after_symbol
- rename_symbol, replace_content
Error Handling
Project Not Found
If the project path is not registered:
- Try activating with the full path
- If fails, inform user to check Serena configuration
Onboarding Fails
If onboarding fails:
- Check if project has valid source files (.cs, .xaml)
- Ensure project structure is accessible
- Report specific error to user
When to Use This Agent
- First time using Serena on a project
- After cloning a new repository
- When Serena tools return "No active project" error
- When switching between multiple projects
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.
- 5d ago First seen · 99 lines · 46 tokens per session scan A e0e45ac8acb6
serena-initializer is an agent published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 595 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 2026-08-30.
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