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+{
+  "name": "claude-md-management",
+  "description": "Tools to maintain and improve CLAUDE.md files - audit quality, capture session learnings, and keep project memory current.",
+  "version": "1.0.0",
+  "author": {
+    "name": "Anthropic",
+    "email": "support@anthropic.com"
+  }
+}
@@ -0,0 +1,202 @@
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@@ -0,0 +1,40 @@
+# CLAUDE.md Management Plugin
+
+Tools to maintain and improve CLAUDE.md files - audit quality, capture session learnings, and keep project memory current.
+
+## What It Does
+
+Two complementary tools for different purposes:
+
+| | claude-md-improver (skill) | /revise-claude-md (command) |
+|---|---|---|
+| **Purpose** | Keep CLAUDE.md aligned with codebase | Capture session learnings |
+| **Triggered by** | Codebase changes | End of session |
+| **Use when** | Periodic maintenance | Session revealed missing context |
+
+## Usage
+
+### Skill: claude-md-improver
+
+Audits CLAUDE.md files against current codebase state:
+
+```
+"audit my CLAUDE.md files"
+"check if my CLAUDE.md is up to date"
+```
+
+<img src="claude-md-improver-example.png" alt="CLAUDE.md improver showing quality scores and recommended updates" width="600">
+
+### Command: /revise-claude-md
+
+Captures learnings from the current session:
+
+```
+/revise-claude-md
+```
+
+<img src="revise-claude-md-example.png" alt="Revise command capturing session learnings into CLAUDE.md" width="600">
+
+## Author
+
+Isabella He (isabella@anthropic.com)
@@ -0,0 +1,54 @@
+---
+description: Update CLAUDE.md with learnings from this session
+allowed-tools: Read, Edit, Glob
+---
+
+Review this session for learnings about working with Claude Code in this codebase. Update CLAUDE.md with context that would help future Claude sessions be more effective.
+
+## Step 1: Reflect
+
+What context was missing that would have helped Claude work more effectively?
+- Bash commands that were used or discovered
+- Code style patterns followed
+- Testing approaches that worked
+- Environment/configuration quirks
+- Warnings or gotchas encountered
+
+## Step 2: Find CLAUDE.md Files
+
+```bash
+find . -name "CLAUDE.md" -o -name ".claude.local.md" 2>/dev/null | head -20
+```
+
+Decide where each addition belongs:
+- `CLAUDE.md` - Team-shared (checked into git)
+- `.claude.local.md` - Personal/local only (gitignored)
+
+## Step 3: Draft Additions
+
+**Keep it concise** - one line per concept. CLAUDE.md is part of the prompt, so brevity matters.
+
+Format: `<command or pattern>` - `<brief description>`
+
+Avoid:
+- Verbose explanations
+- Obvious information
+- One-off fixes unlikely to recur
+
+## Step 4: Show Proposed Changes
+
+For each addition:
+
+```
+### Update: ./CLAUDE.md
+
+**Why:** [one-line reason]
+
+\`\`\`diff
+ [the addition - keep it brief]
+\`\`\`
+```
+
+## Step 5: Apply with Approval
+
+Ask if the user wants to apply the changes. Only edit files they approve.
@@ -0,0 +1,179 @@
+---
+name: claude-md-improver
+description: Audit and improve CLAUDE.md files in repositories. Use when user asks to check, audit, update, improve, or fix CLAUDE.md files. Scans for all CLAUDE.md files, evaluates quality against templates, outputs quality report, then makes targeted updates. Also use when the user mentions "CLAUDE.md maintenance" or "project memory optimization".
+tools: Read, Glob, Grep, Bash, Edit
+---
+
+# CLAUDE.md Improver
+
+Audit, evaluate, and improve CLAUDE.md files across a codebase to ensure Claude Code has optimal project context.
+
+**This skill can write to CLAUDE.md files.** After presenting a quality report and getting user approval, it updates CLAUDE.md files with targeted improvements.
+
+## Workflow
+
+### Phase 1: Discovery
+
+Find all CLAUDE.md files in the repository:
+
+```bash
+find . -name "CLAUDE.md" -o -name ".claude.md" -o -name ".claude.local.md" 2>/dev/null | head -50
+```
+
+**File Types & Locations:**
+
+| Type | Location | Purpose |
+|------|----------|---------|
+| Project root | `./CLAUDE.md` | Primary project context (checked into git, shared with team) |
+| Local overrides | `./.claude.local.md` | Personal/local settings (gitignored, not shared) |
+| Global defaults | `~/.claude/CLAUDE.md` | User-wide defaults across all projects |
+| Package-specific | `./packages/*/CLAUDE.md` | Module-level context in monorepos |
+| Subdirectory | Any nested location | Feature/domain-specific context |
+
+**Note:** Claude auto-discovers CLAUDE.md files in parent directories, making monorepo setups work automatically.
+
+### Phase 2: Quality Assessment
+
+For each CLAUDE.md file, evaluate against quality criteria. See [references/quality-criteria.md](references/quality-criteria.md) for detailed rubrics.
+
+**Quick Assessment Checklist:**
+
+| Criterion | Weight | Check |
+|-----------|--------|-------|
+| Commands/workflows documented | High | Are build/test/deploy commands present? |
+| Architecture clarity | High | Can Claude understand the codebase structure? |
+| Non-obvious patterns | Medium | Are gotchas and quirks documented? |
+| Conciseness | Medium | No verbose explanations or obvious info? |
+| Currency | High | Does it reflect current codebase state? |
+| Actionability | High | Are instructions executable, not vague? |
+
+**Quality Scores:**
+- **A (90-100)**: Comprehensive, current, actionable
+- **B (70-89)**: Good coverage, minor gaps
+- **C (50-69)**: Basic info, missing key sections
+- **D (30-49)**: Sparse or outdated
+- **F (0-29)**: Missing or severely outdated
+
+### Phase 3: Quality Report Output
+
+**ALWAYS output the quality report BEFORE making any updates.**
+
+Format:
+
+```
+## CLAUDE.md Quality Report
+
+### Summary
+- Files found: X
+- Average score: X/100
+- Files needing update: X
+
+### File-by-File Assessment
+
+#### 1. ./CLAUDE.md (Project Root)
+**Score: XX/100 (Grade: X)**
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| Commands/workflows | X/20 | ... |
+| Architecture clarity | X/20 | ... |
+| Non-obvious patterns | X/15 | ... |
+| Conciseness | X/15 | ... |
+| Currency | X/15 | ... |
+| Actionability | X/15 | ... |
+
+**Issues:**
+- [List specific problems]
+
+**Recommended additions:**
+- [List what should be added]
+
+#### 2. ./packages/api/CLAUDE.md (Package-specific)
+...
+```
+
+### Phase 4: Targeted Updates
+
+After outputting the quality report, ask user for confirmation before updating.
+
+**Update Guidelines (Critical):**
+
+1. **Propose targeted additions only** - Focus on genuinely useful info:
+   - Commands or workflows discovered during analysis
+   - Gotchas or non-obvious patterns found in code
+   - Package relationships that weren't clear
+   - Testing approaches that work
+   - Configuration quirks
+
+2. **Keep it minimal** - Avoid:
+   - Restating what's obvious from the code
+   - Generic best practices already covered
+   - One-off fixes unlikely to recur
+   - Verbose explanations when a one-liner suffices
+
+3. **Show diffs** - For each change, show:
+   - Which CLAUDE.md file to update
+   - The specific addition (as a diff or quoted block)
+   - Brief explanation of why this helps future sessions
+
+**Diff Format:**
+
+```markdown
+### Update: ./CLAUDE.md
+
+**Why:** Build command was missing, causing confusion about how to run the project.
+
+```diff
+ ## Quick Start
+
+ ```bash
+ npm install
+ npm run dev  # Start development server on port 3000
+ ```
+```
+```
+
+### Phase 5: Apply Updates
+
+After user approval, apply changes using the Edit tool. Preserve existing content structure.
+
+## Templates
+
+See [references/templates.md](references/templates.md) for CLAUDE.md templates by project type.
+
+## Common Issues to Flag
+
+1. **Stale commands**: Build commands that no longer work
+2. **Missing dependencies**: Required tools not mentioned
+3. **Outdated architecture**: File structure that's changed
+4. **Missing environment setup**: Required env vars or config
+5. **Broken test commands**: Test scripts that have changed
+6. **Undocumented gotchas**: Non-obvious patterns not captured
+
+## User Tips to Share
+
+When presenting recommendations, remind users:
+
+- **`#` key shortcut**: During a Claude session, press `#` to have Claude auto-incorporate learnings into CLAUDE.md
+- **Keep it concise**: CLAUDE.md should be human-readable; dense is better than verbose
+- **Actionable commands**: All documented commands should be copy-paste ready
+- **Use `.claude.local.md`**: For personal preferences not shared with team (add to `.gitignore`)
+- **Global defaults**: Put user-wide preferences in `~/.claude/CLAUDE.md`
+
+## What Makes a Great CLAUDE.md
+
+**Key principles:**
+- Concise and human-readable
+- Actionable commands that can be copy-pasted
+- Project-specific patterns, not generic advice
+- Non-obvious gotchas and warnings
+
+**Recommended sections** (use only what's relevant):
+- Commands (build, test, dev, lint)
+- Architecture (directory structure)
+- Key Files (entry points, config)
+- Code Style (project conventions)
+- Environment (required vars, setup)
+- Testing (commands, patterns)
+- Gotchas (quirks, common mistakes)
+- Workflow (when to do what)
@@ -0,0 +1,109 @@
+# CLAUDE.md Quality Criteria
+
+## Scoring Rubric
+
+### 1. Commands/Workflows (20 points)
+
+**20 points**: All essential commands documented with context
+- Build, test, lint, deploy commands present
+- Development workflow clear
+- Common operations documented
+
+**15 points**: Most commands present, some missing context
+
+**10 points**: Basic commands only, no workflow
+
+**5 points**: Few commands, many missing
+
+**0 points**: No commands documented
+
+### 2. Architecture Clarity (20 points)
+
+**20 points**: Clear codebase map
+- Key directories explained
+- Module relationships documented
+- Entry points identified
+- Data flow described where relevant
+
+**15 points**: Good structure overview, minor gaps
+
+**10 points**: Basic directory listing only
+
+**5 points**: Vague or incomplete
+
+**0 points**: No architecture info
+
+### 3. Non-Obvious Patterns (15 points)
+
+**15 points**: Gotchas and quirks captured
+- Known issues documented
+- Workarounds explained
+- Edge cases noted
+- "Why we do it this way" for unusual patterns
+
+**10 points**: Some patterns documented
+
+**5 points**: Minimal pattern documentation
+
+**0 points**: No patterns or gotchas
+
+### 4. Conciseness (15 points)
+
+**15 points**: Dense, valuable content
+- No filler or obvious info
+- Each line adds value
+- No redundancy with code comments
+
+**10 points**: Mostly concise, some padding
+
+**5 points**: Verbose in places
+
+**0 points**: Mostly filler or restates obvious code
+
+### 5. Currency (15 points)
+
+**15 points**: Reflects current codebase
+- Commands work as documented
+- File references accurate
+- Tech stack current
+
+**10 points**: Mostly current, minor staleness
+
+**5 points**: Several outdated references
+
+**0 points**: Severely outdated
+
+### 6. Actionability (15 points)
+
+**15 points**: Instructions are executable
+- Commands can be copy-pasted
+- Steps are concrete
+- Paths are real
+
+**10 points**: Mostly actionable
+
+**5 points**: Some vague instructions
+
+**0 points**: Vague or theoretical
+
+## Assessment Process
+
+1. Read the CLAUDE.md file completely
+2. Cross-reference with actual codebase:
+   - Run documented commands (mentally or actually)
+   - Check if referenced files exist
+   - Verify architecture descriptions
+3. Score each criterion
+4. Calculate total and assign grade
+5. List specific issues found
+6. Propose concrete improvements
+
+## Red Flags
+
+- Commands that would fail (wrong paths, missing deps)
+- References to deleted files/folders
+- Outdated tech versions
+- Copy-paste from templates without customization
+- Generic advice not specific to the project
+- "TODO" items never completed
+- Duplicate info across multiple CLAUDE.md files
@@ -0,0 +1,253 @@
+# CLAUDE.md Templates
+
+## Key Principles
+
+- **Concise**: Dense, human-readable content; one line per concept when possible
+- **Actionable**: Commands should be copy-paste ready
+- **Project-specific**: Document patterns unique to this project, not generic advice
+- **Current**: All info should reflect actual codebase state
+
+---
+
+## Recommended Sections
+
+Use only the sections relevant to the project. Not all sections are needed.
+
+### Commands
+
+Document the essential commands for working with the project.
+
+```markdown
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `<install command>` | Install dependencies |
+| `<dev command>` | Start development server |
+| `<build command>` | Production build |
+| `<test command>` | Run tests |
+| `<lint command>` | Lint/format code |
+```
+
+### Architecture
+
+Describe the project structure so Claude understands where things live.
+
+```markdown
+## Architecture
+
+```
+<root>/
+  <dir>/    # <purpose>
+  <dir>/    # <purpose>
+  <dir>/    # <purpose>
+```
+```
+
+### Key Files
+
+List important files that Claude should know about.
+
+```markdown
+## Key Files
+
+- `<path>` - <purpose>
+- `<path>` - <purpose>
+```
+
+### Code Style
+
+Document project-specific coding conventions.
+
+```markdown
+## Code Style
+
+- <convention>
+- <convention>
+- <preference over alternative>
+```
+
+### Environment
+
+Document required environment variables and setup.
+
+```markdown
+## Environment
+
+Required:
+- `<VAR_NAME>` - <purpose>
+- `<VAR_NAME>` - <purpose>
+
+Setup:
+- <setup step>
+```
+
+### Testing
+
+Document testing approach and commands.
+
+```markdown
+## Testing
+
+- `<test command>` - <what it tests>
+- <testing convention or pattern>
+```
+
+### Gotchas
+
+Document non-obvious patterns, quirks, and warnings.
+
+```markdown
+## Gotchas
+
+- <non-obvious thing that causes issues>
+- <ordering dependency or prerequisite>
+- <common mistake to avoid>
+```
+
+### Workflow
+
+Document development workflow patterns.
+
+```markdown
+## Workflow
+
+- <when to do X>
+- <preferred approach for Y>
+```
+
+---
+
+## Template: Project Root (Minimal)
+
+```markdown
+# <Project Name>
+
+<One-line description>
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `<command>` | <description> |
+
+## Architecture
+
+```
+<structure>
+```
+
+## Gotchas
+
+- <gotcha>
+```
+
+---
+
+## Template: Project Root (Comprehensive)
+
+```markdown
+# <Project Name>
+
+<One-line description>
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `<command>` | <description> |
+
+## Architecture
+
+```
+<structure with descriptions>
+```
+
+## Key Files
+
+- `<path>` - <purpose>
+
+## Code Style
+
+- <convention>
+
+## Environment
+
+- `<VAR>` - <purpose>
+
+## Testing
+
+- `<command>` - <scope>
+
+## Gotchas
+
+- <gotcha>
+```
+
+---
+
+## Template: Package/Module
+
+For packages within a monorepo or distinct modules.
+
+```markdown
+# <Package Name>
+
+<Purpose of this package>
+
+## Usage
+
+```
+<import/usage example>
+```
+
+## Key Exports
+
+- `<export>` - <purpose>
+
+## Dependencies
+
+- `<dependency>` - <why needed>
+
+## Notes
+
+- <important note>
+```
+
+---
+
+## Template: Monorepo Root
+
+```markdown
+# <Monorepo Name>
+
+<Description>
+
+## Packages
+
+| Package | Description | Path |
+|---------|-------------|------|
+| `<name>` | <purpose> | `<path>` |
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `<command>` | <description> |
+
+## Cross-Package Patterns
+
+- <shared pattern>
+- <generation/sync pattern>
+```
+
+---
+
+## Update Principles
+
+When updating any CLAUDE.md:
+
+1. **Be specific**: Use actual file paths, real commands from this project
+2. **Be current**: Verify info against the actual codebase
+3. **Be brief**: One line per concept when possible
+4. **Be useful**: Would this help a new Claude session understand the project?
@@ -0,0 +1,150 @@
+# CLAUDE.md Update Guidelines
+
+## Core Principle
+
+Only add information that will genuinely help future Claude sessions. The context window is precious - every line must earn its place.
+
+## What TO Add
+
+### 1. Commands/Workflows Discovered
+
+```markdown
+## Build
+
+`npm run build:prod` - Full production build with optimization
+`npm run build:dev` - Fast dev build (no minification)
+```
+
+Why: Saves future sessions from discovering these again.
+
+### 2. Gotchas and Non-Obvious Patterns
+
+```markdown
+## Gotchas
+
+- Tests must run sequentially (`--runInBand`) due to shared DB state
+- `yarn.lock` is authoritative; delete `node_modules` if deps mismatch
+```
+
+Why: Prevents repeating debugging sessions.
+
+### 3. Package Relationships
+
+```markdown
+## Dependencies
+
+The `auth` module depends on `crypto` being initialized first.
+Import order matters in `src/bootstrap.ts`.
+```
+
+Why: Architecture knowledge that isn't obvious from code.
+
+### 4. Testing Approaches That Worked
+
+```markdown
+## Testing
+
+For API endpoints: Use `supertest` with the test helper in `tests/setup.ts`
+Mocking: Factory functions in `tests/factories/` (not inline mocks)
+```
+
+Why: Establishes patterns that work.
+
+### 5. Configuration Quirks
+
+```markdown
+## Config
+
+- `NEXT_PUBLIC_*` vars must be set at build time, not runtime
+- Redis connection requires `?family=0` suffix for IPv6
+```
+
+Why: Environment-specific knowledge.
+
+## What NOT to Add
+
+### 1. Obvious Code Info
+
+Bad:
+```markdown
+The `UserService` class handles user operations.
+```
+
+The class name already tells us this.
+
+### 2. Generic Best Practices
+
+Bad:
+```markdown
+Always write tests for new features.
+Use meaningful variable names.
+```
+
+This is universal advice, not project-specific.
+
+### 3. One-Off Fixes
+
+Bad:
+```markdown
+We fixed a bug in commit abc123 where the login button didn't work.
+```
+
+Won't recur; clutters the file.
+
+### 4. Verbose Explanations
+
+Bad:
+```markdown
+The authentication system uses JWT tokens. JWT (JSON Web Tokens) are
+an open standard (RFC 7519) that defines a compact and self-contained
+way for securely transmitting information between parties as a JSON
+object. In our implementation, we use the HS256 algorithm which...
+```
+
+Good:
+```markdown
+Auth: JWT with HS256, tokens in `Authorization: Bearer <token>` header.
+```
+
+## Diff Format for Updates
+
+For each suggested change:
+
+### 1. Identify the File
+
+```
+File: ./CLAUDE.md
+Section: Commands (new section after ## Architecture)
+```
+
+### 2. Show the Change
+
+```diff
+ ## Architecture
+ ...
+
+## Commands
+
+| Command | Purpose |
+|---------|---------|
+| `npm run dev` | Dev server with HMR |
+| `npm run build` | Production build |
+| `npm test` | Run test suite |
+```
+
+### 3. Explain Why
+
+> **Why this helps:** The build commands weren't documented, causing
+> confusion about how to run the project. This saves future sessions
+> from needing to inspect `package.json`.
+
+## Validation Checklist
+
+Before finalizing an update, verify:
+
+- [ ] Each addition is project-specific
+- [ ] No generic advice or obvious info
+- [ ] Commands are tested and work
+- [ ] File paths are accurate
+- [ ] Would a new Claude session find this helpful?
+- [ ] Is this the most concise way to express the info?