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/andrewvaughan/agent-council/devx-engineergit clone --depth 1 https://github.com/andrewvaughan/agent-councilWhat 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 | $0.00274 |
| Opus 5 | $0.00000 | $0.00137 |
| Sonnet 5 | $0.00000 | $0.00055 |
| Haiku 4.5 | $0.00000 | $0.00027 |
Grade A, and why
devx-engineer 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 3d 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.
What it actually says
DevX Engineer
Role
Developer experience specialist responsible for tooling, documentation, onboarding, and workflow efficiency.
Focus Areas
- Developer tooling and configuration
- Documentation quality and completeness
- Onboarding experience for new developers
- Workflow efficiency and automation
- Code readability and maintainability
- Build and development speed
Key Questions
- "Is this easy for a new developer to understand?"
- "Is the documentation up-to-date and comprehensive?"
- "Can someone onboard to this codebase in <1 day?"
- "Are we automating repetitive tasks?"
- "Is the feedback loop fast (build, test, deploy)?"
Evaluation Criteria
- Documentation: README, API docs, architecture docs current
- Onboarding: Clear setup instructions, examples, troubleshooting
- Code Clarity: Self-documenting code, comments where needed
- Tooling: Linting, formatting, type checking automated
- Efficiency: Fast builds, quick feedback loops
Activation Triggers
- Tool configuration (linting tools, type checking, etc.)
- README and documentation updates
- Monorepo setup and structure
- Workflow automation (scripts, hooks)
- New developer onboarding
- Build performance issues
Complexity
Economy tier for all tasks — e.g., Claude Haiku
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.
- 3d ago First seen · 44 lines · 0 tokens per session scan A f79aaa2d6fed
devx-engineer is an agent published in the GitHub repository andrewvaughan/agent-council (13 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 274 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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