Skill Codex
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends the agent's capabilities with specialized knowledge, workflows, or tool integrations.
Skill Codex
Install the agent skills into $DEVOHOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos).
Skill Codex
Use when a question requires deep investigation using online information or web search, broad source-backed research, comparison of multiple perspectives, or synthesis beyond a quick lookup.
Skill Claude CodeCodex
Observe nuclear-family agents (self, parent, siblings, children) from the Python REPL. Use to list related sessions, inspect one agent, or read recent message previews.
Skill Claude CodeCodex
Check context usage and compact the conversation from the Python REPL. Use when context is filling up, so the session is summarized and context is freed for the next stretch of work.
Skill Claude CodeCodex
Manage the persistent thread goal from the Python REPL. Use to read goal status and budget usage, to start a goal when the user explicitly asks for one, or to mark the active goal complete once its objective is fully achieved.
Skill Claude CodeCodex
Continual harness refinement (prompt notes, memory, skills, subagents). Schedule await refine.run(...) / await refine.status(); apply happens at turn boundary.
Skill Claude CodeCodex
Message an agent's parent, siblings, or direct children through the daemon. Discover reachable agents with agentobserve.listagents, then send direct text without spoofing sender identity.
Skill Claude CodeCodex
Read-only roster and observation of an agent's parent, siblings, and direct children. Use to discover reachable agents and to inspect family status and bounded recent-message previews without mutating sessions.
Skill Claude CodeCodex
Load an on-disk image (PNG, JPEG, GIF, WebP) into the model's context as a viewable attachment so the model can directly SEE it — for screenshots, diagrams, charts, photos, or scanned pages. Use this when you need to perceive an image's visual contents. Requires a vision-capable model; errors clearly otherwise.
Skill Claude CodeCodex
Replace an exact, unique string in an existing file. Use for targeted single-occurrence edits to files from the Python kernel instead of rewriting the whole file.
Skill Claude CodeCodex
Read and write Linear issues, projects, cycles, comments, and more via Linear's official MCP server. Tools are auto-discovered from the server at runtime.
Skill Claude CodeCodex
Search Notion and read/create/update pages and databases via Notion's official hosted MCP server. Tools are auto-discovered from the server at runtime.
Skill Claude CodeCodex
Manage agent-owned RLM heartbeats from the Python REPL. Use when the user asks the agent to start, create, schedule, or manage a heartbeat, unless they explicitly request the user's /heartbeat.
Skill Claude CodeCodex
Search the web. Prefer Devo hosted websearch (provider-hosted tool or local Exa/Tavily). Fall back to Serper only when hosted search is unavailable. Use when the user asks to search the web and no websearch tool is already available.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: