name	vendor-adapters
description	Maintain ynh vendor adapters against current vendor plugin specs. Use when updating adapters, checking spec compliance, or adding new vendor support.

Vendor Adapter Maintenance

Use this skill when updating ynh vendor adapters, verifying spec compliance, or researching vendor plugin format changes. This is the single source of truth for all vendor documentation links and format mappings.

Vendor Documentation Links

Claude Code (Anthropic)

Area	URL
CLI Reference	https://code.claude.com/docs/en/cli-reference
Plugins Overview	https://code.claude.com/docs/en/plugins
Plugins Reference	https://code.claude.com/docs/en/plugins-reference
Plugin Marketplaces	https://code.claude.com/docs/en/plugin-marketplaces
Hooks Guide	https://code.claude.com/docs/en/hooks-guide
MCP Servers	https://code.claude.com/docs/en/mcp
Settings Reference	https://code.claude.com/docs/en/settings
Subagents	https://code.claude.com/docs/en/sub-agents
Official Plugins Repo	https://github.com/anthropics/claude-plugins-official

OpenAI Codex

Area	URL
Plugins Overview	https://developers.openai.com/codex/plugins
Plugin Build Guide	https://developers.openai.com/codex/plugins/build
Hooks	https://developers.openai.com/codex/hooks
CLI Reference	https://developers.openai.com/codex
GitHub Repo	https://github.com/openai/codex

Cursor

Area	URL
Plugin Template	https://github.com/cursor/plugin-template
Official Plugins Repo	https://github.com/cursor/plugins
Marketplace	https://cursor.com/marketplace
MCP Servers	https://docs.cursor.com/advanced/mcp
Rules (.mdc)	https://docs.cursor.com/advanced/rules
CLI	https://cursor.com/cli
Forum: .agents/ support	https://forum.cursor.com/t/support-for-agent-folder-compatibility/154167

Cross-Vendor Standards

Area	URL
Agent Skills (agentskills.io)	https://agentskills.io
AGENTS.md Spec	https://github.com/agentsmd/agents.md
.agents/ Folder Spec	https://github.com/agentsfolder/spec

ynh-to-Vendor Format Mapping

What ynh calls each concept vs what each vendor calls it and where it lives.

Plugin Manifest

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| .harness.json      | .claude-plugin/plugin.json       | .codex-plugin/plugin.json        | .cursor-plugin/plugin.json       |
| (source format)   | (distribution format)            | (distribution format)            | (distribution format)            |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Required fields:  | name                             | name, version, description       | name, version, description       |
| name, version     |                                  |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Skills

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| skills/<name>/    | skills/<name>/SKILL.md           | skills/<name>/SKILL.md           | skills/<name>/SKILL.md           |
|   SKILL.md        |                                  |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Runtime:          | .claude/skills/<name>/SKILL.md   | .codex/skills/ (or .agents/      | .cursor/skills/<name>/SKILL.md   |
|                   |                                  |  skills/ standalone)             |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Plugin export:    | skills/<name>/SKILL.md           | skills/<name>/SKILL.md           | skills/<name>/SKILL.md           |
|                   | (at plugin root)                 | (at plugin root)                 | (at plugin root)                 |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Invocation:       | /plugin-name:skill-name          | @plugin-name skill-name          | /plugin-name:skill-name          |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Format:           | YAML frontmatter + markdown      | YAML frontmatter + markdown      | YAML frontmatter + markdown      |
|                   | (name, description)              | (name, description)              | (name, description)              |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Agents / Subagents

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| agents/<name>.md  | agents/<name>.md                 | NOT SUPPORTED in plugins         | agents/<name>.md                 |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Frontmatter:      | name, description, model,        |                                  | name, description                |
|                   | tools, disallowedTools, skills,  |                                  |                                  |
|                   | maxTurns, effort, memory,        |                                  |                                  |
|                   | background, isolation            |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Delegation:       | Native subagent system           | NOT SUPPORTED                    | NEEDS RESEARCH                   |
| (delegates_to)    | via agent .md files              |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Rules

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| rules/<name>.md   | .claude/rules/<name>.md          | NOT SUPPORTED in plugins         | .cursor/rules/<name>.mdc         |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Format:           | Plain markdown                   |                                  | .mdc (markdown + frontmatter     |
|                   |                                  |                                  |  with description, globs,        |
|                   |                                  |                                  |  alwaysApply)                    |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Legacy:           |                                  |                                  | .cursorrules (project root,      |
|                   |                                  |                                  |  deprecated but still read)      |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Commands

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| commands/         | commands/<name>.md               | NOT SUPPORTED in plugins         | commands/<name>.md               |
|   <name>.md       | (LEGACY -- use skills instead)   |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Hooks

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| .harness.json      | hooks/hooks.json (plugin)        | .codex/hooks.json                | hooks/hooks.json (plugin)        |
|   hooks: {}       | .claude/settings.json (project)  | ~/.codex/hooks.json (user)       | .cursor/settings.json (project)  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Format:           | Three-level nesting:             | Three-level nesting:             | Two formats:                     |
|                   | event > matcher > hooks[]        | event > matcher > hooks[]        | - Plugin: flat (legacy names)    |
|                   |                                  |                                  | - Settings: three-level          |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Events            | 25 events (see Claude docs)      | 5 events: SessionStart,          | 25 events (same as Claude)       |
| (vendor-native):  | Key: PreToolUse, PostToolUse,    | PreToolUse, PostToolUse,         |                                  |
|                   | UserPromptSubmit, Stop,          | UserPromptSubmit, Stop           |                                  |
|                   | SessionStart, ...                |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh canonical     | before_tool -> PreToolUse        | before_tool -> PreToolUse        | before_tool -> beforeShellExec   |
| event mapping:    | after_tool  -> PostToolUse       | after_tool  -> PostToolUse       | after_tool  -> afterFileEdit     |
|                   | before_prompt -> UserPromptSubmit| before_prompt -> UserPromptSubmit| before_prompt -> beforeSubmit    |
|                   | on_stop -> Stop                  | on_stop -> Stop                  | on_stop -> stop                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Hook types:       | command, http, prompt, agent     | command only                     | command, prompt, http, agent     |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| --plugin-dir      | Skills: YES                      | N/A (uses symlinks)              | N/A (uses symlinks)              |
| auto-activation:  | Hooks: NO (need /plugin enable)  |                                  |                                  |
|                   | MCP: NO (need /plugin enable)    |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

MCP Servers

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| .harness.json      | .claude/.mcp.json (plugin)       | .mcp.json (plugin root)          | .cursor/mcp.json (project)       |
|   mcp_servers: {} | .mcp.json (project root)         |                                  | mcp.json (plugin root)           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Format:           | JSON: {"mcpServers": {...}}      | JSON: {"mcpServers": {...}}      | JSON: {"mcpServers": {...}}      |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Server types:     | stdio (command+args)             | stdio (command+args)             | stdio, SSE, streamable HTTP      |
|                   | HTTP (url+headers)               |                                  | OAuth supported                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Marketplace

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Index file:       | .claude-plugin/marketplace.json  | .agents/plugins/                 | .cursor-plugin/marketplace.json  |
|                   |                                  |   marketplace.json               |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Format:           | name, owner, plugins[]           | name, interface.displayName,     | name, owner, metadata,           |
|                   |   (name, source, description,    |   plugins[] (name, source,       |   plugins[] (name, source,       |
|                   |    version)                      |    policy, category)             |    description)                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Plugin source:    | "./plugins/name" (relative)      | {"source":"local",               | "plugin-name" (relative dir)     |
|                   |                                  |  "path":"./plugins/name"}        |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Install cmd:      | /plugin install name@marketplace | codex (via Plugin Directory)     | /add-plugin                      |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Official:         | anthropics/claude-plugins-       | OpenAI Plugin Directory          | cursor.com/marketplace           |
|                   |   official (GitHub)              |   (coming soon)                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Instructions File

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Source:            |                                  |                                  |                                  |
| instructions.md   | CLAUDE.md (project root)         | AGENTS.md (project root)         | .cursorrules (project root,      |
|                   |                                  |                                  |  deprecated)                     |
|                   |                                  |                                  | .cursor/rules/*.mdc (current)    |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh runtime:      | --append-system-prompt           | Written as codex.md in           | Written as .cursorrules in       |
|                   | (injected, no file conflict)     |   staging dir                    |   staging dir                    |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh export:       | AGENTS.md + CLAUDE.md            | AGENTS.md                        | .cursorrules + AGENTS.md         |
|                   |  (CLAUDE.md contains @AGENTS.md  |                                  |                                  |
|                   |   import — see workaround below) |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Claude AGENTS.md workaround: Claude Code does not read AGENTS.md natively (see https://code.claude.com/docs/en/memory). ynh exports a CLAUDE.md containing just @AGENTS.md which uses Claude's @-import syntax to pull in the cross-vendor instructions file. This avoids duplicating content while ensuring Claude reads the instructions. The plugin's CLAUDE.md lives inside the plugin directory, so it does not conflict with the project's own CLAUDE.md.

Launch Strategy

+-------------------+----------------------------------+----------------------------------+----------------------------------+
| ynh               | Claude Code                      | Codex                            | Cursor                           |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Binary:           | claude                           | codex                            | agent                            |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Launch:           | syscall.Exec (process replace)   | exec.Command (child process)     | exec.Command (child process)     |
|                   | --plugin-dir + --add-dir +       | cmd.Dir = stagingDir             | cmd.Dir = stagingDir             |
|                   | --append-system-prompt           |                                  |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Symlinks:         | No (uses --plugin-dir)           | Yes (into project .codex/)       | Yes (into project .cursor/)      |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Non-interactive:  | claude -p "prompt"               | codex exec "prompt"              | agent -p "prompt"                |
+-------------------+----------------------------------+----------------------------------+----------------------------------+
| Vendor-specific   | --dangerously-skip-permissions   | --skip-git-repo-check            | NEEDS RESEARCH                   |
| flags of note:    | --model, --permission-mode       | --model, --full-auto             |                                  |
+-------------------+----------------------------------+----------------------------------+----------------------------------+

Known Gaps and Research Needed

+------+------------------------------------------+------------+
| Prio | Gap                                      | Vendor     |
+------+------------------------------------------+------------+
| HIGH | Codex plugin manifest not generated       | Codex      |
| HIGH | Codex skills export path wrong            | Codex      |
|      |   (.agents/skills/ should be skills/)    |            |
| HIGH | Codex MCP format wrong                   | Codex      |
|      |   (TOML should be JSON .mcp.json)        |            |
| HIGH | Codex marketplace not generated           | Codex      |
| ---  | Claude AGENTS.md: RESOLVED               | Claude     |
|      |   (CLAUDE.md with @AGENTS.md import)     |            |
| MED  | Cursor plugin hooks format               | Cursor     |
|      |   (flat legacy vs three-level settings)  |            |
| MED  | Cursor .mdc rules format                 | Cursor     |
|      |   (ynh writes .md, Cursor wants .mdc     |            |
|      |    with globs/alwaysApply frontmatter)    |            |
| LOW  | SessionStart canonical event             | All        |
|      |   (Codex + Claude support it, not mapped) |            |
| LOW  | Hook types beyond "command"              | Claude,    |
|      |   (prompt, http, agent not mapped)       | Cursor     |
| LOW  | Cursor subagent/delegation support       | Cursor     |
|      |   (needs research)                       |            |
| LOW  | Cursor CLI flags for non-interactive     | Cursor     |
|      |   (needs research)                       |            |
+------+------------------------------------------+------------+

Workflow

When updating a vendor adapter:

Fetch current docs from the URLs above
Compare against the format mapping tables
Update adapter code in internal/vendor/<vendor>.go
Update exporter in internal/exporter/exporter.go if export format changed
Update manifest in internal/exporter/manifest.go if plugin.json format changed
Update marketplace in internal/marketplace/ if marketplace format changed
Update tests for all changed files
Update docs in docs/vendors.md, docs/hooks.md, docs/mcp.md, docs/marketplace.md
Run make check to verify everything passes
Manual test with the actual vendor CLI to confirm the output works

name	vendor-adapters
description	Maintain ynh vendor adapters against current vendor plugin specs. Use when updating adapters, checking spec compliance, or adding new vendor support.