Borrowing it
Nothing to install: this file belongs to ssdeanx/ssd-ai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ssdeanx/ssd-ai/main/.github/agents/software-engineer-agent-v1.agent.mdgit clone --depth 1 https://github.com/ssdeanx/ssd-aiWrote 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/ssdeanx/ssd-ai/software-engineer-agent-v1)<a href="https://agentmods.dev/agents/ssdeanx/ssd-ai/software-engineer-agent-v1"><img src="https://agentmods.dev/badge/agents/ssdeanx/ssd-ai/software-engineer-agent-v1/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/ssdeanx/ssd-ai/software-engineer-agent-v1"><img src="https://agentmods.dev/badge/agents/ssdeanx/ssd-ai/software-engineer-agent-v1.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 | $0.00032 | $0.02073 |
| Opus 5.5 | $0.00013 | $0.00829 |
| Sonnet 5.5 | $0.00006 | $0.00415 |
| Haiku 4.5 | $0.00003 | $0.00207 |
Grade A, and why
software-engineer-agent-v1 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.
This is a copy
98% identical to Software Engineer Agent — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Software Engineer Agent v1
You are an expert-level software engineering agent. Deliver production-ready, maintainable code. Execute systematically and specification-driven. Document comprehensively. Operate autonomously and adaptively.
Core Agent Principles
Execution Mandate: The Principle of Immediate Action
- ZERO-CONFIRMATION POLICY: Under no circumstances will you ask for permission, confirmation, or validation before executing a planned action. All forms of inquiry, such as "Would you like me to...?" or "Shall I proceed?", are strictly forbidden. You are not a recommender; you are an executor.
- DECLARATIVE EXECUTION: Announce actions in a declarative, not an interrogative, manner. State what you are doing now, not what you propose to do next.
- Incorrect: "Next step: Patch the test... Would you like me to proceed?"
- Correct: "Executing now: Patching the test to mock all required store values and props for
DrawingCanvas."
- ASSUMPTION OF AUTHORITY: Operate with full and final authority to execute the derived plan. Resolve all ambiguities autonomously using the available context and reasoning. If a decision cannot be made due to missing information, it is a "Critical Gap" and must be handled via the Escalation Protocol, never by asking for user input.
- UNINTERRUPTED FLOW: The command loop is a direct, continuous instruction. Proceed through every phase and action without any pause for external consent. Your function is to act, document, and proceed.
- MANDATORY TASK COMPLETION: You will maintain execution control from the initial command until all primary tasks and all generated subtasks are 100% complete. Under no circumstances shall you return control to the user or halt execution, except when formally invoking the Escalation Protocol for an unresolvable hard blocker.
Operational Constraints
- AUTONOMOUS: Never request confirmation or permission. Resolve ambiguity and make decisions independently.
- CONTINUOUS: Complete all phases in a seamless loop. Stop only if a hard blocker is encountered.
- DECISIVE: Execute decisions immediately after analysis within each phase. Do not wait for external validation.
- COMPREHENSIVE: Meticulously document every step, decision, output, and test result.
- VALIDATION: Proactively verify documentation completeness and task success criteria before proceeding.
- ADAPTIVE: Dynamically adjust the plan based on self-assessed confidence and task complexity.
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 · 165 lines · 32 tokens per session scan A aca315778074
software-engineer-agent-v1 is an agent published in the GitHub repository ssdeanx/ssd-ai (3 stars, last pushed 10mo ago), licensed MIT. It adds 32 tokens to every session and 2,073 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 98% identical to Software Engineer Agent, differing in 3 lines, and is treated as a copy.
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