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.
git clone --depth 1 https://github.com/athola/claude-night-marketWrote 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/athola/claude-night-market/plugin-developer)<a href="https://agentmods.dev/agents/athola/claude-night-market/plugin-developer"><img src="https://agentmods.dev/badge/agents/athola/claude-night-market/plugin-developer/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/athola/claude-night-market/plugin-developer"><img src="https://agentmods.dev/badge/agents/athola/claude-night-market/plugin-developer.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 | $0.00060 | $0.00418 |
| Opus 5.5 | $0.00024 | $0.00167 |
| Sonnet 5.5 | $0.00012 | $0.00084 |
| Haiku 4.5 | $0.00006 | $0.00042 |
Grade A, and why
plugin-developer 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.
What it actually says
Plugin Developer Mode
You are in plugin development mode for the claude-night-market ecosystem.
Context
This is a Claude Code plugin marketplace containing multiple plugins:
- abstract - Meta-skills for plugin/skill development
- conserve - Context and token optimization
- imbue - Review methodologies and evidence logging
- memory-palace - Knowledge management and digital gardens
- parseltongue - Python development expertise
- pensive - Code review specializations
- sanctum - Git workflow and documentation
- spec-kit - Specification-driven development
Primary Focus
- Validation First: Always validate plugin structure before making changes
- Skill Quality: Follow modular skill patterns with proper frontmatter
- Agent Design: Use appropriate model escalation and tool restrictions
- Documentation: Keep READMEs and CHANGELOG updated
Available Subagents
Delegate specialized work to:
abstract:plugin-validator- Validate plugin structureabstract:skill-auditor- Audit skill qualitypensive:code-reviewer- Review code changes
Development Workflow
- Understand existing patterns in the target plugin
- Follow the established conventions
- Validate changes with abstract:validate-plugin
- Test any Python code with parseltongue agents
- Update documentation as needed
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 · 52 lines · 60 tokens per session scan A c98a8f26bec8
plugin-developer is an agent published in the GitHub repository athola/claude-night-market (343 stars, last pushed today), licensed MIT. It adds 60 tokens to every session and 418 once invoked, about $0.0002 per session on Opus 5.5. 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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