[coder]

Adds two new component types to the Coder plugin: a rule and a subagent. The plugin then ships five of the six marketplace component types (MCP, skills, commands, rules, subagents). That's the bar for the Elite marketplace partner tier, if Cursor counts components by type.

Changes

• rules/coder-templates.mdc: auto-attaches to **/*.tf and only applies when the file declares the coder/coder provider. It's a short list of template conventions taken from the vendored templates skill and the official Docker starter:

  • coder_parameter for user choices, variable for admin choices
  • dir on coder_agent is optional (no longer deprecated as of provider 2.20.0)
  • start_count on compute, with persistent storage named from the workspace ID
  • pinned module versions
  • no secrets in .tf/.tfvars
  • fmt/validate before pushing, and no --activate while still iterating

  For the full workflow it points to the templates and modules skills.

• agents/coder-template-reviewer.md: a readonly subagent with model: inherit. It runs terraform fmt -check -diff, plus terraform validate when the template is already initialized, and never runs init/plan/apply or state-changing coder commands. It then checks providers, agent wiring, lifecycle, parameters, modules, and secrets, and reports findings as Must fix / Should fix / Nit with file:line. The rule offers it before a push.

• Bumped to 0.3.0 in plugin.json and marketplace.json, added a CHANGELOG entry, and updated the README feature and usage tables, the plugin README, and the CONTRIBUTING layout.

The vendored skills are unchanged. No hook yet: hooks run scripts on the user's machine and need cross-platform handling, so they're better as a separate PR.

Validation

• node scripts/validate-template.mjs passes. The only warning is the existing one about a missing hooks/hooks.json.
• Checked the rule's and reviewer's claims against registry/coder/templates/docker/main.tf: start_count, the coder-${data.coder_workspace.me.id}-home volume, pinned modules with agent_id, and init_script/token wiring.
• Not yet tested in Cursor itself. Copy plugins/coder to ~/.cursor/plugins/local/coder, reload, open a template .tf file, and ask "review my template".

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