@glrs-dev/harness-opencode

An opinionated OpenCode agent harness — orchestrator, plan, build, QA, skills, MCP wiring, hashline editing. Delivered as a single npm plugin.

What is it?

@glrs-dev/harness-opencode is an OpenCode plugin that registers agents, slash commands, custom tools, MCP servers, and skills at runtime via the OpenCode plugin config hook. Zero files are written to your ~/.config/opencode/ directory (except a single plugin-array entry in opencode.json).

Phase A (current): OpenCode-only. Claude Code support is Phase B.

What you get

• Primary agents — orchestrator (five-phase end-to-end), plan (interactive planner), build (plan executor)
• Subagents — gap-analyzer, plan-reviewer, qa-reviewer, code-searcher, lib-reader, architecture-advisor, docs-maintainer, agents-md-writer
• Slash commands — /ship, /autopilot, /review, /init-deep, /research, /fresh, /costs
• Generic skills — review-plan, web-design-guidelines, vercel-react-best-practices, vercel-composition-patterns
• OpenCode tools — ast_grep, tsc_check, eslint_check, todo_scan, comment_check
• Bundled sub-plugins — notify (OS notifications for question tool), autopilot (opt-in completion-tag loop driver with skeptical verifier gate — only activates on explicit /autopilot invocation, never on normal orchestrator sessions), cost-tracker (running LLM spend by provider/model at ~/.glorious/opencode/costs.json; view with /costs; disable with GLORIOUS_COST_TRACKER=0, override path with GLORIOUS_COST_TRACKER_DIR)
• MCP server wiring — serena (AST code intel), memory (per-repo JSON memory, worktree-shared), git (structured blame/log). playwright and linear defined but disabled — flip a flag to enable.
• Hashline edit system — line-reference prefixes that validate content hashes before every edit. Requires opencode-hashline (separate plugin, auto-preserved by our installer).

Install

bunx @glrs-dev/harness-opencode install

This adds "@glrs-dev/harness-opencode" to your ~/.config/opencode/opencode.json plugin array non-destructively. Your existing plugins and settings are preserved. A .bak.<epoch>-<pid> backup is written before any mutation.

Or add it manually:

{
  "plugin": ["@glrs-dev/harness-opencode"]
}

Update

bun update @glrs-dev/harness-opencode

Or if you're using floating semver in your opencode.json, OpenCode's internal bun install step handles it on startup.

Customize

Agents, commands, MCPs: user's opencode.json overrides take precedence over plugin-injected defaults. To override the orchestrator model:

{
  "agent": {
    "orchestrator": {
      "model": "anthropic/claude-sonnet-4-6"
    }
  }
}

Skills: skills are read-only by design (they live in node_modules, owned by npm). To customize a skill, fork this package, modify the skill, publish your fork, and swap the plugin entry.

Rollback

To pin to a specific version:

bunx @glrs-dev/harness-opencode install --pin

This injects "@glrs-dev/harness-opencode@<current-version>" into your plugin array. OpenCode's plugin loader accepts name@version and name@^semver specifiers.

For a broken release: npm deprecate @glrs-dev/harness-opencode@<broken> "<reason>" + patch publish. Users on floating semver auto-recover on next bun update.

Uninstall

bunx @glrs-dev/harness-opencode uninstall

Removes the plugin entry from opencode.json. Skills live in node_modules — removed by bun remove @glrs-dev/harness-opencode.

Migrating from the old clone+symlink install

If you were using the previous install.sh-based harness (the ~/.glorious/opencode/ clone), see docs/migration-from-clone-install.md.

Privacy

The plugin checks registry.npmjs.org once per day to see if a newer version is available. No analytics, no telemetry, no identifiers beyond what fetch() sends. Opt out: export HARNESS_OPENCODE_UPDATE_CHECK=0.

Prerequisites

• OpenCode (install from https://opencode.ai)
• bun or npm (for plugin installation)
• uvx (for serena + git MCPs — brew install uv)
• node/npx (for memory MCP)

Contributing

Pull requests welcome. Before submitting, read AGENTS.md — it covers the plugin architecture, type-surface escape hatches, and the zero-user-filesystem-writes invariant.

License

MIT