A plugin for AI coding agents (Claude Code, Cursor, Codex) that adds capabilities current providers don't offer. RetroCode reads your agent session traces and turns them into actionable improvements — automatically.

What you get:

• Playbook Generation — Automatically builds and maintains project-specific rules from your past sessions, written directly into your agent's rule files
• Skills Sharing — Export repo-specific agent skills and share them with teammates via bundles or git
• Hypothesis Generation — Statistically identifies which agent behaviors predict user rejection, with community sharing
• AnalyzeMe — Your AI Coding Wrapped: Spotify-style fun stats about your vibe coding patterns, personas, and habits
• AI Code Blast Radius — Automatically estimates the blast radius of a code edit by identifying how many execution paths and subsystems depend on the modified code

Works with Claude Code, Cursor, and Codex. Supports OpenAI, Anthropic, Gemini, and CommonStack as LLM providers.

Full reference: docs/reference.md

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Playbook Generation

Automatically builds and maintains a project-specific playbook of coding patterns, workflow strategies, and common mistakes learned from your past sessions. Focuses on real misunderstandings between you and your AI agent — every rule stems from actual friction. The playbook is written directly into your agent's rule files (CLAUDE.md, .cursor/rules/retro.mdc, AGENTS.md) so every future session benefits.

How it works:

1. Reads session traces from Claude Code, Cursor, and/or Codex
2. A Reflector analyzes each conversation for misunderstandings — corrections, wrong assumptions, over-engineering, communication breakdowns
3. A Curator takes all reflections together, identifies cross-session patterns, and adds/modifies/removes one-liner bullets in a structured playbook
4. The playbook is synced into configured output files between <!-- retro:start/end --> markers

Two modes:

Mode	Flag	Behavior
Silent (default)	--silent or no flag	Auto-applies all curator decisions to the playbook
Interactive	--verbose	Shows proposed changes 5 at a time; you pick which to keep

# Silent mode (default) — auto-apply
retro --offline --dir .

# Interactive mode — review each change
retro --offline --verbose --dir .

# Background daemon
retro --up --dir .            # start polling continuously
retro --down --dir .          # stop the daemon

In --verbose mode, you'll see batches of 5 proposed changes and can select by number, a (accept all), s (skip batch), or q (quit):

  Candidates 1-5 of 12:

  [1] + ADD to CODING_PATTERNS
      Always read the file before editing to avoid overwriting recent changes.

  [2] ~ MODIFY [coding-00003]
      Prefer Glob/Grep before editing unfamiliar files.

  [3] - DELETE [mistake-00007]

  Enter numbers to keep (e.g. 1,2), 'a' for all, 's' to skip all, or 'q' to quit:
  >

Hypothesis Generation

Statistically identifies patterns in your sessions that predict explicit user rejection ("No, that's wrong", "undo this"). Useful for understanding what mistakes your AI agent keeps making and sharing discoveries with the community.

retro --hypogen --dir .       # find patterns in your sessions
retro --submit --dir .        # submit discoveries to the shared collection
retro --pull --dir .          # verify community hypotheses against your traces
retro --contribute --dir .    # contribute your verification stats back

Results are written to .retro/hypoGen/HYPOTHESES.md. Significant hypotheses can be submitted to swe-hypotheses via retro --submit. Use retro --pull to see how community-discovered patterns hold up against your own data, and retro --contribute to add your stats to the shared evidence base.

AnalyzeMe — Your AI Coding Wrapped

Get a Spotify Wrapped-style breakdown of your AI coding history. See your persona, tool habits, coding schedule, patience score, and quirky fun facts — all computed locally from your traces with zero LLM calls.

retro --analyzeme --dir .               # terminal output
retro --analyzeme --save-html --dir .   # also save a shareable HTML report

What you'll see:

Card	What it shows
Persona	Your coding personality (e.g. "The Terminal Wizard", "The Architect", "The Perfectionist") with description
Toolkit	Bar chart of your most-used tools (Read, Edit, Bash, Grep, etc.)
Languages	Top languages by files touched
Schedule	Night Owl vs Early Bird, peak coding hour, busiest day, longest streak
Editing Style	"Careful" (read-then-edit) vs "Cowboy" (edit-first) with a percentage bar
Patience Score	How often you say "No" to your AI, with commentary
Delegation Score	How much you use sub-agents vs handling things yourself
AI Compatibility	Combined score based on acceptance rate, tool diversity, and session engagement
Fun Facts	Quirky one-liners about your habits ("Your go-to tool was Bash — you two are inseparable")

The --save-html flag generates a dark-themed, shareable HTML page at .retro/wrapped.html with gradient cards and animated bars.

Tool names are normalized across sources — Codex's exec_command becomes Bash, Cursor's read_file_tool becomes Read, etc. — so your stats are consistent regardless of which agents you use.

Skills Sharing

Generate shareable agent skills from your repo experience and share them with teammates. Skills are structured instruction files (SKILL.md) that encode non-obvious repo knowledge — extension point patterns, debugging workflows, architectural conventions — things an AI agent can't discover by reading the code alone.

# Generate skills from your traces + codebase analysis
retro --export-skills --dir .

# Bundle into a portable file to send to a teammate
retro --export-skills -o skills.tar.gz --dir .

Sharing with teammates:

# Developer A: generate and bundle
retro --export-skills -o my-skills.tar.gz --dir .

# Send my-skills.tar.gz to teammate (Slack, email, shared drive)

# Developer B: import from the bundle
retro --import-skills -i my-skills.tar.gz --dir .

Or via git — commit .retro/skills/ to the repo, then teammates import:

retro --import-skills --dir .       # imports from .retro/skills/ → .claude/skills/

Merge strategies when a skill exists both locally and in the shared source:

Strategy	Flag	Behavior
Local-first (default)	--strategy local-first	Keep your local version, skip shared
Retro-first	--strategy retro-first	Overwrite local with shared version
Merge	--strategy merge	Smart merge: union tools, merge unique items within sections, pick longer descriptions
Interactive	--strategy interactive	Per-skill prompt: see diff, choose keep/take/merge

The merge strategy is content-aware: when both versions have the same section (e.g., ## Steps), it deduplicates individual bullet points and code blocks instead of skipping or duplicating the whole section. Frontmatter is merged intelligently — allowed-tools are unioned, the longer description wins, and new keys from the shared version are added.

# Smart merge — deduplicates items, unions tools
retro --import-skills -i teammate.tar.gz --strategy merge --dir .

# Interactive — see diffs, decide per skill
retro --import-skills -i teammate.tar.gz --strategy interactive --dir .

# Preview without writing anything
retro --import-skills --dry-run --dir .

# Import from multiple sources
retro --import-skills --source /path/to/other/skills --dir .

Skills are written to .claude/skills/ where Claude Code discovers them automatically. Each skill becomes a slash command (/add-reader, /debug-daemon, etc.) or background context depending on its configuration.

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Quickstart

# 1. Install
git clone <repo-url>
cd RetroCode
pip install -e .

# 2. Set your API key (pick one)
export COMMONSTACK_API_KEY=your_key_here   # default — free credits for members
# export OPENAI_API_KEY=your_key_here      # or OpenAI   (LLM_PROVIDER=openai)
# export ANTHROPIC_API_KEY=your_key_here   # or Anthropic (LLM_PROVIDER=anthropic)
# export GEMINI_API_KEY=your_key_here      # or Gemini    (LLM_PROVIDER=gemini)

# 3. Go to your project and run
cd ~/my-project
retro --offline --dir .

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Supported agents

Configure which traces to read and which rule files to update in retro_config.yaml:

sources:
  inputs:  [claude-code, cursor, codex]   # default: all three
  outputs: [claude-code]                  # default: CLAUDE.md only

	Claude Code	Cursor	Codex
Input (traces)	~/.claude/projects/	~/.cursor/projects/	~/.codex/sessions/
Output (rules)	CLAUDE.md	.cursor/rules/retro.mdc	AGENTS.md

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Configuration

Drop a retro_config.yaml in your project root. See the root retro_config.yaml for a full example with comments.

Key options: daemon.poll_interval, daemon.min_rounds, playbook.max_bullets, playbook.batch_size, playbook.default_model, sources.inputs, sources.outputs.

See docs/reference.md for all options.

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LLM providers

Default is CommonStack (free credits for members). Override with LLM_PROVIDER:

Provider	LLM_PROVIDER	Key env var
CommonStack (default)	commonstack	COMMONSTACK_API_KEY
OpenAI	openai	OPENAI_API_KEY
Anthropic	anthropic	ANTHROPIC_API_KEY
Gemini	gemini	GEMINI_API_KEY
OpenRouter	openrouter	OPENROUTER_API_KEY