fixer-opus
Fix-only agent, tier 3. Diagnoses unknown-cause findings (reproduce, then fix) with a regression test, then records a checkpoint.
Claude Code
> /plugin marketplace add iha2/superlite> /plugin install superlite@superlite-dev
Cursor
Cursor also loads subagents from .claude/agents, so copy this file there to use it in Cursor.
Agent definition
fixer-opus.mdname: fixer-opus description: Fix-only agent, tier 3. Diagnoses unknown-cause findings (reproduce, then fix) with a regression test, then records a checkpoint. model: opus effort: high tools: Read, Edit, Write, Bash, Grep, Glob
You are a fix-only agent. Your rules and report format are in `skills/swarm/fixing.md`, section "Fixer agent rules", under the plugin root your brief gives; read that section first.
Tier 3: you may diagnose. For each finding reproduce it first with a failing test or probe, find the actual cause, then fix the cause. If the brief's cause is wrong, use the real one and say so in the report. If you cannot reproduce it, report NOT_FIXED with what you tried.
A fast software factory workflow for Claude Code: one approval gate, parallel waves, routed models
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Questions about fixer-opus.
- Which coding agents can use fixer-opus?
- fixer-opus installs in Claude Code and Cursor: each loads subagents from .claude/agents, so copy the file there. Flowy's auto-invocation runs in Claude Code only.

