common-llm-security
OWASP LLM Top 10 (2025) audit checklist for AI applications, agent tools, RAG pipelines, and prompt construction. Use when performing any security review touching LLM client code, prompt templates, agent tools, or vector stores.
What this skill does
# OWASP LLM Top 10 Security Checklist (2025) ## **Priority: P0 (CRITICAL)** ## Implementation Guidelines - **Check LLM01 first**: Prompt injection #1 LLM finding — any user input concatenated directly into prompt string immediate P0. - **Check LLM06 next**: Agent tools with write/delete/execute capabilities without confirmation P0. - **Mark each item**: ✅ not affected | ⚠️ needs review | 🔴 confirmed finding. - **P0 finding caps Security score at 40/100** — not skip any item. - See [references/owasp-llm.md](references/owasp-llm.md) for full detection signals. ## OWASP LLM Top 10 (2025) | ID | Risk | Key Detection Signal | | ----- | ---- | -------------------- | | LLM01 | Prompt Injection | User input string-concatenated into prompt. Retrieved docs inserted into system turn. | | LLM02 | Sensitive Information Disclosure | PII or credentials passed into prompt context. LLM response logged without redaction. | | LLM03 | Supply Chain | Unverified model weights or plugins. Third-party agent added without trust review. | | LLM04 | Data & Model Poisoning | User-controlled data written to training sets or embedding stores without validation. | | LLM05 | Improper Output Handling | LLM output used directly in DOM sink, SQL query, shell command, or redirect URL. | | LLM06 | Excessive Agency | Agent tool with write/delete/network access — no human-in--loop confirmation. | | LLM07 | System Prompt Leakage | System prompt content returned via tool output, error message, or API response. | | LLM08 | Vector & Embedding Weaknesses | User text injected into vector store without sanitization. No tenant namespace isolation. | | LLM09 | Misinformation | LLM output used for critical decisions (medical, financial, legal) without verification. | | LLM10 | Unbounded Consumption | No `max_tokens` on LLM call. No rate limit on invocations. Agent loop without depth cap. | ## Anti-Patterns - **No prompt concat**: Pass user input as separate `user` turn, never interpolated into system prompts. - **No raw LLM output in sinks**: Sanitize LLM responses before writing to DOM, queries, or shell. - **No uncapped agent loops**: Every agentic recursion must enforce max iteration/depth limit. ## References - [OWASP LLM — Full Detection Signals](references/owasp-llm.md) — load when auditing any LLM client code
Related in AI Agents
skill-development
IncludedComprehensive meta-skill for creating, managing, validating, auditing, and distributing Claude Code skills and slash commands (unified in v2.1.3+). Provides skill templates, creation workflows, validation patterns, audit checklists, naming conventions, YAML frontmatter guidance, progressive disclosure examples, and best practices lookup. Use when creating new skills, validating existing skills, auditing skill quality, understanding skill architecture, needing skill templates, learning about YAML frontmatter requirements, progressive disclosure patterns, tool restrictions (allowed-tools), skill composition, skill naming conventions, troubleshooting skill activation issues, creating custom slash commands, configuring command frontmatter, using command arguments ($ARGUMENTS, $1, $2), bash execution in commands, file references in commands, command namespacing, plugin commands, MCP slash commands, Skill tool configuration, or deciding between skills vs slash commands. Delegates to docs-management skill for official documentation.
reprompter
IncludedTransform messy prompts into well-structured, effective prompts — single or multi-agent. Use when: "reprompt", "reprompt this", "clean up this prompt", "structure my prompt", rough text needing XML tags and best practices, "reprompter teams", "repromptception", "run with quality", "smart run", "smart agents", multi-agent tasks, audits, parallel work, anything going to agent teams. Don't use when: simple Q&A, pure chat, immediate execution-only tasks. See "Don't Use When" section for details. Outputs: Structured XML/Markdown prompt, quality score (before/after), optional team brief + per-agent sub-prompts, agent team output files. Success criteria: Single mode quality score ≥ 7/10; Repromptception per-agent prompt quality score 8+/10; all required sections present, actionable and specific.
adaptive-compaction
IncludedAdaptive add-on policy and recovery layer that decides WHEN to compact, prune, snapshot, or fork -- replacing fixed-percent auto-compaction across Claude Code, Codex, and MCP-capable hosts. Trigger on auto-compact timing or damage: "when should I compact", "is it safe to compact now or start a fresh session", "auto-compact fires too early/mid-task", "switching to an unrelated task but the window still has space", "context rot", "answers get worse the longer the session runs", "the agent forgot the plan or my decisions after it summarized", "add a layer on top that manages context without changing the agent", raising autoCompactWindow to give the policy room, or installing/tuning a cross-tool compaction policy or PreCompact hook -- even when "compaction" is never said but the problem is context-window pressure or post-summarization memory loss. Do NOT use to summarize a conversation, build RAG, write a summarization prompt (decides WHEN not HOW), or answer max-context-length trivia.
agent-skill-creator
IncludedCreate cross-platform agent skills from workflow descriptions. Activates when users ask to create an agent, automate a repetitive workflow, create a custom skill, or need advanced agent creation. Triggers on phrases like create agent for, automate workflow, create skill for, every day I have to, daily I need to, turn process into agent, need to automate, create a cross-platform skill, validate this skill, export this skill, migrate this skill. Supports single skills, multi-agent suites, transcript processing, template-based creation, interactive configuration, cross-platform export, and spec validation.
llm-wiki
IncludedUse when building or maintaining a persistent personal knowledge base (second brain) in Obsidian where an LLM incrementally ingests sources, updates entity/concept pages, maintains cross-references, and keeps a synthesis current. Triggers include "second brain", "Obsidian wiki", "personal knowledge management", "ingest this paper/article/book", "build a research wiki", "compound knowledge", "Memex", or whenever the user wants knowledge to accumulate across sessions instead of being re-derived by RAG on every query.
skill-master
IncludedAgent Skills authoring, evaluation, and optimization. Create, edit, validate, benchmark, and improve skills following the agentskills.io specification. Use when designing SKILL.md files, structuring skill folders (references, scripts, assets), ingesting external documentation into skills, running trigger evals, benchmarking skill quality, optimizing descriptions, or performing blind A/B comparisons. Keywords: agentskills.io, SKILL.md, skill authoring, eval, benchmark, trigger optimization.