Harness import

Import a Harness Configuration

You are helping the user install plugins from a harness.yaml file — either all of them or a subset they choose.

This skill handles both format versions:

• v1 protocol format (version: "1" string) — uses source: owner/repo per plugin, may include mcp-servers, env, and instructions sections
• Legacy format (version: 1 integer) — uses marketplace: key per plugin with a marketplaces: section

Workflow Order (MANDATORY)

Follow these steps in order. Do not skip any step.

---

Step 1: Find and read the config

Check for harness.yaml in this order:

1. A path provided by the user after /harness-import (e.g., /harness-import ~/dotfiles/harness.yaml)
2. ./harness.yaml in the current directory

If no file is found at either location, tell the user:

"No harness.yaml found. Get one from a teammate or generate your own with /harness-export."

Read and parse the file. Detect which format version it uses:

• version: "1" (string) → Protocol v1 format
• version: 1 (integer) → Legacy format

---

Step 2: Show what's available

Display the plugin list clearly before asking anything:

Plugins in this config:

  1. explain (harnessprotocol/harness-kit) — Layered explanations of files, functions, directories, or concepts
  2. research (harnessprotocol/harness-kit) — Process any source into a structured, compounding knowledge base
  3. superpowers (obra/superpowers-marketplace) — Structured dev workflows — TDD, systematic debugging, subagent delegation

For legacy format, resolve the source by looking up plugins[].marketplace → marketplaces[key].

Then, if the file contains any of the following sections, mention them briefly:

• mcp-servers: — "This config also declares MCP servers. I'll ask about those after plugins."
• env: — "This config declares environment variables. I'll surface those after plugins."
• instructions: — "This config includes harness instructions. I'll offer to apply those after plugins."

Then ask:

"Would you like to install all of these, pick a subset, or get more details on any before deciding?"

---

Step 3: Handle the user's choice

"All" — mark all plugins as selected, skip to Step 5.

"Details" — for each plugin the user asks about, explain what it does based on its description. You can supplement with your knowledge of harness-kit plugins. Then return to this question.

"Pick" or "subset" — proceed to Step 4.

---

Step 4: Individual selection

Walk through each plugin one at a time:

"explain — Layered explanations of files, functions, directories, or concepts. Include? (yes/no)"

Wait for the answer before moving to the next plugin. Collect the selection list.

After all plugins: "Got it — you've selected: [list]. Ready to generate the install commands?"

---

Step 5: Generate install commands

Output the complete Claude Code command sequence. Marketplace adds come first, plugin installs second.

For protocol v1 format (source: owner/repo), derive marketplace info from the source field:

Run these in Claude Code:

/plugin marketplace add harnessprotocol/harness-kit
/plugin marketplace add obra/superpowers-marketplace

/plugin install explain@harness-kit
/plugin install superpowers@obra

The marketplace short name to use in /plugin install commands is the repo name (last segment of owner/repo). Example: harnessprotocol/harness-kit → short name harness-kit.

For legacy format (marketplace: key + marketplaces: section), resolve as before:

• marketplace: harness-kit + marketplaces.harness-kit: harnessprotocol/harness-kit → /plugin marketplace add harnessprotocol/harness-kit

Only include marketplaces for plugins actually selected.

Close with:

"Paste these into Claude Code and run them in order. Restart Claude Code after the installs complete."

---

Step 5.5: Offer cross-platform setup

After generating the Claude Code install commands, scan the current directory for other AI tool indicators.

Cursor is present if any of these exist: .cursor/, .cursor/rules/, .cursor/mcp.json, .cursor/skills/ GitHub Copilot is present if any of these exist: .github/, .github/skills/, .vscode/mcp.json

If .github/ is the only Copilot indicator present, ask the user: "I found a .github/ directory but no other Copilot indicators. Are you using GitHub Copilot in this project?" Only include Copilot in the multi-select menu if the user confirms.

If neither platform is detected, skip this step silently — do not ask.

If one or more platforms are detected, show them and ask which to include:

"I detected the following other AI tools in this project: Cursor, GitHub Copilot. Which would you like to set up?

1. Both
2. Cursor only
3. Copilot only
4. Neither (skip)"

For each confirmed platform, copy installed skill SKILL.md files:

• Only copy skills that have an installed SKILL.md at ~/.claude/skills/<name>/SKILL.md
• Only copy skill files for the plugins the user selected in Steps 3–4. Do not copy all installed skills — only the selected subset.
• Cursor: copy to .cursor/skills/<name>/SKILL.md
• Copilot: copy to .github/skills/<name>/SKILL.md

Frontmatter adaptation when copying:

• If the source SKILL.md frontmatter has a dependencies field, rename it to compatibility
• Enforce that the name field is lowercase letters and hyphens only, max 64 characters. Truncate and slugify if needed.
• If description exceeds 1024 characters, truncate at the last word boundary before 1024 characters and append …

Create parent directories before writing (.cursor/skills/<name>/, .github/skills/<name>/, .github/instructions/).

Record which platforms were confirmed — Steps 6 and 8 will use this.

---

Step 6: Handle MCP servers (if present)

If the config has a mcp-servers: section, walk through each server:

"This config declares an MCP server: postgres (stdio, uvx mcp-server-postgres). Would you like me to add this to your .mcp.json?"

If yes, write or update .mcp.json in the current directory with the server definition.

If platforms were confirmed in Step 5.5, also write to platform-specific MCP configs:

• Cursor confirmed: also write .cursor/mcp.json
• Copilot confirmed: also write .vscode/mcp.json

All three files use the same mcpServers JSON structure:

{
  "mcpServers": {
    "postgres": {
      "type": "stdio",
      "command": "uvx",
      "args": ["mcp-server-postgres", "--connection-string", "${DB_CONNECTION_STRING}"]
    }
  }
}

Note the casing: mcpServers (camelCase) — not mcp-servers, not mcp_servers.

Merge behavior (applies to all target files): If the target file already exists, add new servers but do not overwrite existing server configurations. If a server name already exists in the target file, warn:

Warning: <target-config-file> already defines server '<server-name>'. Existing config kept.
  To update it, edit <target-config-file> directly or remove the entry and re-run.

For example: Warning: .cursor/mcp.json already defines server 'postgres'. Existing config kept.

Create parent directories before writing (.cursor/, .vscode/).

If the server command contains ${VAR} references, note which env vars are needed (the env: section will cover them in Step 7).

---

Step 7: Surface env declarations (if present)

If the config has an env: section, display them clearly:

Environment variables required by this harness:

  DB_CONNECTION_STRING (required, sensitive) — PostgreSQL connection string for the project database.
  ANALYTICS_API_KEY (optional, sensitive) — API key for the analytics MCP server.

Tell the user:

"These environment variables need to be set before using the MCP servers or skills that depend on them. Set them in your shell profile, .env file, or secret manager."

Do NOT ask for the values — sensitive vars must never be stored in the harness file or conversation.

---

Step 8: Offer to apply instructions (if present)

If the config has an instructions: section and import-mode: merge (or if import-mode is absent, default to merge), offer:

"This config includes harness instructions (operational guidance for the AI). Would you like me to append them to your CLAUDE.md or AGENT.md?"

If yes, append to the file the user specifies. If import-mode: replace is set, warn:

"This config requests full replacement of existing instructions. That will overwrite your current CLAUDE.md/AGENT.md. Are you sure?"

If Cursor or Copilot was confirmed in Step 5.5, also compile instructions to those platforms using the same import-mode from harness.yaml. Use metadata.name from the harness.yaml as {name} (or default if absent). Wrap all generated content in section markers (exact format — do not deviate):

<!-- BEGIN harness:{name}:{slot} -->
...generated content...
<!-- END harness:{name}:{slot} -->

Cursor operational — write .cursor/rules/harness.mdc with mandatory frontmatter before the marker block:

---
description: Harness operational instructions
globs: **/*
alwaysApply: true
---

Cursor behavioral — if instructions.behavioral is present in harness.yaml, write .cursor/rules/behavioral.mdc with mandatory frontmatter before the marker block:

---
description: Harness behavioral preferences
globs: **/*
alwaysApply: true
---

Then content from instructions.behavioral in section markers <!-- BEGIN harness:{name}:behavioral --> / <!-- END harness:{name}:behavioral -->.

GitHub Copilot operational — write .github/copilot-instructions.md with mandatory frontmatter before the marker block:

---
applyTo: "**"
---

GitHub Copilot behavioral — if instructions.behavioral is present in harness.yaml, write .github/instructions/behavioral.instructions.md with mandatory frontmatter before the marker block:

---
applyTo: "**"
---

Then content from instructions.behavioral in section markers <!-- BEGIN harness:{name}:behavioral --> / <!-- END harness:{name}:behavioral -->.

Identity slot: Omit for both Cursor and Copilot — the identity slot is Claude Code-only.

Apply the same import-mode behavior for all Cursor and Copilot files:

• merge (default): If the file exists and contains matching markers, update the content between them. If no markers exist yet, append the marker block at the end (creating the file if it does not exist).
• replace: Before overwriting any Cursor or Copilot instruction file, warn the user and require confirmation, the same as for CLAUDE.md:

  "This config requests full replacement of existing [file]. That will overwrite your current [file] content. Are you sure?" Never apply replace without confirmation.

• skip: Do not write or modify the file.

Create parent directories before writing (.cursor/rules/, .github/, .github/instructions/).

---

Step 9: Offer shell fallback

After all the above, add:

"If you'd rather install without Claude Code, use the shell script:

curl -fsSL https://raw.githubusercontent.com/harnessprotocol/harness-kit/main/harness-restore.sh | bash -s -- harness.yaml

This installs skill files directly (no scripts or hooks — those require the marketplace install)."

---

Step 9.5: Cross-platform compilation report

If cross-platform setup was performed (at least one platform confirmed in Step 5.5), print a summary after all steps complete:

Cross-platform setup complete:

  Cursor:
    Skills:  explain, research  (.cursor/skills/)
    MCP:     postgres  (.cursor/mcp.json)
    Instructions:  harness.mdc (operational), behavioral.mdc (behavioral)

  GitHub Copilot:
    Skills:  explain, research  (.github/skills/)
    MCP:     (none declared in harness.yaml)
    Instructions:  copilot-instructions.md (operational), behavioral.instructions.md (behavioral)

Omit any row where nothing was written for that category (e.g., omit MCP: if the harness has no mcp-servers: section). Omit a platform block entirely if that platform was not confirmed or nothing was written for it. If cross-platform setup was skipped (Step 5.5 produced no confirmations), do not print this report.

---

Common Mistakes

Mistake	Fix
Including marketplaces for plugins the user didn't select	Only add marketplace add lines for marketplaces that have at least one selected plugin
Forgetting to explain the @name convention	The @name in /plugin install must match the marketplace short name (repo name), not the owner
Skipping the marketplace add commands	They must come before the plugin installs, or the installs will fail
Ignoring mcp-servers, env, instructions sections	Always check for these sections and handle them in the appropriate steps
Prompting the user for sensitive env var values	Never ask for secret values — just tell the user which vars to set and where
Asking about cross-platform setup when no other platforms are detected	Only prompt for cross-platform setup if Cursor or Copilot indicators are found; skip silently otherwise
Copying skill SKILL.md files that aren't installed	Only copy skills that have a SKILL.md at ~/.claude/skills/<name>/SKILL.md
Using mcp_servers or mcp-servers in MCP JSON files	JSON key must be mcpServers (camelCase) in all target files
Silently skipping MCP server key collisions in Cursor/Copilot configs	Always warn when a server name already exists in the target file — never skip silently
Omitting Cursor .mdc frontmatter	Always add description, globs, alwaysApply frontmatter — it is mandatory for Cursor to recognize the file
Omitting Copilot copilot-instructions.md frontmatter	Always add applyTo: "**" frontmatter to Copilot instructions files
Using wrong section marker format	Markers must be exact: <!-- BEGIN harness:{name}:{slot} --> — any deviation breaks merge logic
Skipping parent directory creation	Always create parent dirs (.cursor/skills/<name>/, .github/skills/<name>/, .cursor/rules/, .vscode/) before writing
Printing the cross-platform report when nothing was set up	Only print Step 9.5 report if at least one platform was confirmed in Step 5.5