Read Docs

Read Documentation - Documentation Reading with Access Logging

When to Use This Skill

Use this skill when:

• You need to read project documentation from the ./docs folder
• You want to understand architecture, design decisions, or implementation details
• You're looking for guidance on how to implement something
• You need to learn about specific components or subsystems
• The user asks you to "check the docs" or "read the documentation"

Core Philosophy

Track What's Useful: Every documentation access is logged with a helpfulness score to understand which docs are valuable and which need improvement. When docs are missing or inadequate, request new documentation.

Documentation Location

All project documentation is located in:

./docs/

Browse this directory to find relevant documentation files.

Workflow

Phase 1: Find Relevant Documentation

1. List available docs

   find ./docs -type f -name "*.md" | sort
   

2. Search for relevant topics

   grep -r "keyword" ./docs/
   

   Use Grep tool with appropriate patterns to find docs about specific topics.

3. Read the documentation Use the Read tool to view the documentation file.

Phase 2: Log Your Access

After reading a documentation file, you MUST append an access log entry to the end of that file.

Access Log Format:

2025-12-26T10:41:33Z +1 Accessed to understand rendering issues

Components:

• Timestamp: ISO 8601 format (YYYY-MM-DDTHH:MM:SSZ in UTC)
• Score: One of +1, +0, or -1
• Comment: Short description of why you accessed the doc

Scoring Guidelines:

• +1: The doc was helpful and contained the information you needed
• +0: The doc was somewhat relevant but didn't fully answer your question
• -1: The doc was not helpful, outdated, or contained incorrect information

Implementation: Use the helper script for atomic append operations:

# Log documentation access
.claude/scripts/log-doc-access.sh ./docs/architecture.md +1 "Accessed to understand BVH acceleration structure"

The helper script handles UTC timestamp generation and atomic appending automatically.

Phase 3: Request Missing or Inadequate Documentation

If any of the following are true:

• No relevant documentation exists for your topic
• Documentation is incomplete and missing key information
• Documentation is out of date and no longer matches the code

Then you MUST add a documentation request to ./docs/documentation-requests.md.

When to Request Documentation:

1. No docs found: You searched but couldn't find any documentation on the topic
2. Incomplete docs: The doc exists but is missing critical details you need
3. Outdated docs: The doc contradicts the actual code or describes old behavior
4. Scored -1 or +0: If you logged a -1 or +0 score, consider whether a doc request is needed

Documentation Request Format:

## [Topic/Component Name]
- **Requested**: 2025-12-26T10:41:33Z
- **Requested by**: Agent working on [brief context]
- **Reason**: [Why documentation is needed]
- **Current state**: [None/Incomplete/Outdated]
- **Needed information**: [What should be documented]

Implementation: Use atomic append to add the request:

cat >> ./docs/documentation-requests.md << 'EOF'

## BVH Split Algorithm Details
- **Requested**: $(date -u +"%Y-%m-%dT%H:%M:%SZ")
- **Requested by**: Agent debugging BVH performance issue
- **Reason**: Need detailed explanation of median-split algorithm implementation
- **Current state**: Incomplete (./docs/bvh.md mentions it but lacks details)
- **Needed information**: Step-by-step algorithm, when to use SAH vs median, performance characteristics
EOF

Important: If you logged access with -1 or +0 score, ALSO add a documentation request explaining what was missing.

Phase 4: Use the Information

Apply the information you learned from the documentation (or work around the gaps) to complete your task.

Complete Example - Documentation Found and Helpful

# Step 1: Find relevant docs
find ./docs -type f -name "*.md"

# Step 2: Read the documentation
# (Use Read tool to view ./docs/rendering.md)

# Step 3: Log access
.claude/scripts/log-doc-access.sh ./docs/rendering.md +1 "Accessed to learn about progressive rendering passes"

# Step 4: Use the information in your work

Complete Example - Documentation Missing

# Step 1: Search for docs on texture mapping
grep -r "texture" ./docs/

# Step 2: No relevant docs found!

# Step 3: Add documentation request
cat >> ./docs/documentation-requests.md << 'EOF'

## Texture Mapping Implementation
- **Requested**: $(date -u +"%Y-%m-%dT%H:%M:%SZ")
- **Requested by**: Agent implementing texture support
- **Reason**: No documentation exists on how textures are loaded and applied
- **Current state**: None
- **Needed information**: Texture loading, UV coordinate handling, sampling methods, supported formats
EOF

# Step 4: Inform user and proceed based on code inspection

Complete Example - Documentation Outdated

# Step 1: Read ./docs/materials.md
# (Use Read tool)

# Step 2: Notice the doc describes old Material interface, but code has changed

# Step 3: Log access with -1 score
.claude/scripts/log-doc-access.sh ./docs/materials.md -1 "Information outdated, Material interface has changed"

# Step 4: Add documentation request
cat >> ./docs/documentation-requests.md << 'EOF'

## Material Interface (Update Needed)
- **Requested**: $(date -u +"%Y-%m-%dT%H:%M:%SZ")
- **Requested by**: Agent implementing new material type
- **Reason**: Documentation describes old interface that no longer matches code
- **Current state**: Outdated (./docs/materials.md)
- **Needed information**: Updated interface with new BSDF methods, PDF_f function, current material types
EOF

# Step 5: Proceed based on actual code

Access Log Examples

Helpful documentation (+1)

2025-12-26T10:41:33Z +1 Accessed to understand rendering issues
2025-12-26T11:15:20Z +1 Needed info on BVH construction algorithm
2025-12-26T14:22:45Z +1 Referenced for BDPT implementation details

Somewhat helpful (+0)

2025-12-26T10:45:12Z +0 Partial information about texture mapping
2025-12-26T13:30:00Z +0 Found overview but needed more detail

Note: Consider adding a documentation request for missing details

Not helpful (-1)

2025-12-26T11:00:00Z -1 Information was outdated, code has changed
2025-12-26T15:45:30Z -1 Doc didn't cover the topic I needed

Note: You MUST add a documentation request when logging -1

Important Notes

Atomic Appends

Always use atomic operations when appending:

• Use .claude/scripts/log-doc-access.sh for access logs (handles atomicity automatically)
• Use cat >> file << 'EOF' for multi-line documentation requests
• Do NOT read the file, modify it in memory, and write it back
• This prevents race conditions when multiple agents access docs simultaneously

Always Log Access

You MUST log every documentation access, even if:

• The doc wasn't helpful (use -1)
• You only skimmed it (use +0)
• You accessed it multiple times (log each access)

Always Request Missing Docs

You MUST add a documentation request when:

• No relevant docs exist
• Docs are incomplete (scored +0 or -1)
• Docs are outdated (scored -1)

Don't silently work around missing docs - request them so they can be created!

Comment Quality

Keep comments short but informative:

• ✅ Good: "Accessed to understand BVH split algorithm"
• ✅ Good: "Needed info on BDPT light path construction"
• ✅ Good: "Checking how materials are defined"
• ❌ Bad: "Read the doc"
• ❌ Bad: "Information needed"

Timestamp Format

The helper script automatically generates timestamps in UTC timezone and ISO 8601 format (YYYY-MM-DDTHH:MM:SSZ). This ensures consistent timestamps regardless of system timezone.

Benefits of Access Logging and Requests

The system helps:

1. Identify valuable documentation - High +1 scores show what's useful
2. Find gaps - Documentation requests reveal missing topics
3. Detect outdated docs - Multiple -1 scores and requests indicate problems
4. Track usage patterns - See which topics are frequently consulted
5. Prioritize documentation work - Most-requested docs should be written first
6. Improve documentation - Comments reveal what people are looking for

Integration with Other Skills

This skill works well with:

• fix-bug skill: Read docs to understand how systems should work before debugging
• docs-maintainer agent: Access logs and requests guide documentation improvements
• Feature development: Consult architecture docs before implementing

Example Workflow - Complete Session

User: "How does the BDPT integrator handle light paths?"

1. Search for BDPT documentation:
   grep -r "BDPT" ./docs/

2. Found ./docs/integrators.md, read it:
   (Use Read tool)

3. Doc explains basic BDPT but lacks light path details:
   - Log access with +0 score:
     .claude/scripts/log-doc-access.sh ./docs/integrators.md +0 "Found BDPT overview but lacks light path details"

   - Add documentation request:
     cat >> ./docs/documentation-requests.md << 'EOF'

## BDPT Light Path Construction (Details Needed)
- **Requested**: $(date -u +"%Y-%m-%dT%H:%M:%SZ")
- **Requested by**: Agent explaining BDPT to user
- **Reason**: Documentation explains BDPT concept but not implementation details
- **Current state**: Incomplete (./docs/integrators.md)
- **Needed information**: Light path construction algorithm, connection strategies, MIS weight calculation, splat handling
EOF

4. Examine code to fill in gaps and explain to user

Common Pitfalls to Avoid

• Don't forget to log - Every read must be logged
• Don't forget to request - Missing/inadequate docs need requests
• Don't use non-atomic operations - Always use echo >> file or cat >> file
• Don't use local timezone - Always use UTC with date -u
• Don't write vague comments - Be specific about why you accessed the doc
• Don't skip logging on -1 - Negative scores are valuable feedback
• Don't skip requesting on -1/+0 - Document what was inadequate

Special Considerations

Multiple Accesses

If you access the same doc multiple times in one task, log each access:

# First access - found overview
.claude/scripts/log-doc-access.sh ./docs/renderer.md +0 "Initial overview of renderer architecture"

# Second access - found specific detail
.claude/scripts/log-doc-access.sh ./docs/renderer.md +1 "Found tile worker pool implementation details"

Documentation Requests File

The ./docs/documentation-requests.md file may not exist initially. That's okay - your first append will create it:

cat >> ./docs/documentation-requests.md << 'EOF'
# Documentation Requests

This file tracks requests for new or improved documentation.

## First Request Topic
...
EOF

Parallel Agents

The atomic append operations (helper script and cat >>) are safe for parallel access:

• Each agent's append is independent
• No need for locks or synchronization
• Logs and requests may be out of chronological order (that's okay)

Request Deduplication

Don't worry about duplicate requests - it's better to log multiple requests for the same missing doc than to miss documenting what's needed. Multiple requests indicate high priority!