Documentation Currency Skill

Purpose: Detect documentation that has become stale or outdated over time.

What This Skill Detects

1. Stale Status Markers

Problem: Status claims that are no longer true

Patterns:

• "CRITICAL ISSUE" markers for solved problems
• "WIP" (Work In Progress) for completed work
• "TODO" for already-implemented features
• "EXPERIMENTAL" for mature features
• "UNSTABLE" for stable APIs

Detection:

# Find status markers
grep -r "CRITICAL ISSUE\|WIP\|TODO\|EXPERIMENTAL\|UNSTABLE" *.md

# Check if context suggests resolution
# Example: "CRITICAL ISSUE" but code has fix

2. Version Lag

Problem: Documentation references old versions

Example:

# docs/guide.md:15

Compatible with v1.2.0 and above

// package.json:3
"version": "2.5.0"

Detection: Documentation references versions > 2 major releases old.

3. Stale "Coming Soon" Claims

Problem: Features marked "coming soon" that either:

• Are already implemented
• Were cancelled
• Have been "coming soon" for > 6 months

Example:

# README.md:67

- ✅ Streaming support
- ✅ Tool calling
- 🔄 Image attachments (coming soon) ← Added 8 months ago

# Check git history
git log --all --grep="image" --since="6 months ago"
# No commits found → Probably cancelled

# Or: Implementation exists
grep -r "image.*attachment" src/  # Found code

Detection: Check git blame age of "coming soon" markers.

4. Outdated Links

Problem: Documentation links to old URLs or deprecated resources

Example:

# docs/api.md:45

See: https://api.example.com/v1/docs ← v1 API deprecated

Detection:

• API version in URLs doesn't match current version
• Links to deprecated GitHub repos
• References to merged/closed issues

5. Contradictory Dates

Problem: "Last Updated" dates that don't match git history

Example:

# PROJECT.md:3

Last Updated: 2024-10-01

# Git shows recent changes
git log --oneline PROJECT.md | head -1
# abc123 docs: major architecture update (2024-10-26)

Detection: Compare "Last Updated" with git log dates.

Workflow

Phase 1: Scan for Stale Markers

Step 1.1: Find All Status Markers

# Search all markdown files for status indicators
find . -name "*.md" -type f | while read file; do
  grep -n "CRITICAL ISSUE\|WIP\|TODO\|EXPERIMENTAL\|UNSTABLE\|FIXME\|HACK\|TEMP" "$file"
done

Create marker map:

{
  "PROJECT.md:181": {
    "marker": "CRITICAL ISSUE",
    "context": "Tool calling duplication",
    "line": 181,
    "age_days": 90
  },
  "README.md:45": {
    "marker": "TODO",
    "context": "Add authentication docs",
    "line": 45,
    "age_days": 180
  }
}

Step 1.2: Check Marker Age

# For each marker, get git blame age
git blame -L 181,181 PROJECT.md
# Output: 2e8237c (90 days ago) ...

Age thresholds:

• CRITICAL ISSUE: Should resolve within 30 days
• WIP: Should complete within 60 days
• TODO: Should address within 90 days
• Coming Soon: Should implement within 180 days

Step 1.3: Validate Marker Relevance

For each marker:

For "CRITICAL ISSUE":

# Search for fix in code
grep -r "{issue_keyword}" src/

# Check recent commits
git log --oneline --since="90 days ago" | grep -i "{issue_keyword}"

# If fix found → Marker is STALE

For "TODO":

# Search for implementation
grep -r "{feature_keyword}" src/

# If implementation found → Marker is STALE

For "WIP":

# Check if file still being modified
git log --oneline --since="30 days ago" -- {file}

# If no recent changes → Probably complete, marker is STALE

Phase 2: Detect Version Lag

Step 2.1: Extract Current Version

# From package.json
CURRENT_VERSION=$(jq -r '.version' package.json)

# Or pyproject.toml
CURRENT_VERSION=$(grep '^version' pyproject.toml | cut -d'"' -f2)

# Or Cargo.toml
CURRENT_VERSION=$(grep '^version' Cargo.toml | head -1 | cut -d'"' -f2)

Parse as semantic version: MAJOR.MINOR.PATCH

Step 2.2: Find Version References in Docs

# Search for version patterns
grep -r "v[0-9]\+\.[0-9]\+\.[0-9]\+" docs/ *.md

# Common patterns:
# - "Compatible with v1.2.0"
# - "Since version 1.5.0"
# - "Deprecated in v2.0.0"

For each reference:

{
  "docs/guide.md:15": {
    "referenced_version": "1.2.0",
    "context": "Compatible with v1.2.0 and above",
    "current_version": "2.5.0",
    "major_versions_behind": 1,
    "is_stale": true
  }
}

Stale threshold: > 1 major version behind

Step 2.3: Check Changelog Lag

# Latest version in CHANGELOG.md
CHANGELOG_VERSION=$(grep -E "^## \[" CHANGELOG.md | head -1 | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')

# Compare to package.json
if [ "$CHANGELOG_VERSION" != "$CURRENT_VERSION" ]; then
  echo "CHANGELOG is behind: $CHANGELOG_VERSION vs $CURRENT_VERSION"
fi

Phase 3: Find Stale "Coming Soon" Claims

Step 3.1: Extract Future Claims

# Search for common "future" indicators
grep -rn "coming soon\|planned\|roadmap\|future\|🔄" *.md docs/

# Common patterns:
# - "🔄 Feature X (coming soon)"
# - "Planned for next release"
# - "Roadmap: Feature Y"

For each claim:

{
  "README.md:67": {
    "claim": "Image attachments (coming soon)",
    "marker": "🔄",
    "line": 67,
    "file": "README.md"
  }
}

Step 3.2: Check Claim Age

# Git blame to find when claim was added
git blame -L 67,67 README.md
# Output: abc123 (8 months ago) ...

# Age in days
AGE_DAYS=240

Age threshold: > 180 days (6 months)

Step 3.3: Check Implementation Status

Option 1: Feature was implemented

# Search codebase for feature
grep -r "image.*attachment" src/

# If code found → Claim is STALE (should update to ✅)

Option 2: Feature was cancelled

# Check for removal commits
git log --all --grep="remove.*image" --grep="cancel.*attachment"

# If cancellation commit found → Claim is STALE (should remove)

Option 3: Still in progress (not stale)

# Check recent activity
git log --since="3 months ago" --grep="image\|attachment"

# If recent commits → Still active, not stale

Phase 4: Validate "Last Updated" Dates

Step 4.1: Extract Claimed Dates

# Search for "Last Updated" patterns
grep -rn "Last Updated\|Updated:\|Last modified" *.md

# Common formats:
# - Last Updated: 2024-10-01
# - Updated: October 1, 2024
# - Last modified: 10/01/2024

Step 4.2: Compare with Git History

# For each file with "Last Updated"
git log -1 --format="%ai" PROJECT.md
# Output: 2024-10-26 15:30:45 -0700

# Compare dates
CLAIMED_DATE="2024-10-01"
ACTUAL_DATE="2024-10-26"

# If difference > 7 days → Stale date marker

Phase 5: Check for Broken References

Step 5.1: Find Internal References

# Search for markdown links
grep -rn '\[.*\](.*\.md)' docs/

# Search for file path references
grep -rn '\./.*\.sh\|\./src/.*\.ts' *.md docs/

Example references:

[Architecture](docs/ARCHITECTURE.md)
See: ./scripts/debug/test.sh
Implementation: src/convert.ts:45

Step 5.2: Validate References

# For each reference, check if file exists
REFERENCE="docs/ARCHITECTURE.md"
if [ ! -f "$REFERENCE" ]; then
  echo "BROKEN: $REFERENCE"
fi

# For file:line references
REFERENCE="src/convert.ts:45"
FILE=$(echo $REFERENCE | cut -d: -f1)
LINE=$(echo $REFERENCE | cut -d: -f2)

if [ ! -f "$FILE" ]; then
  echo "BROKEN: File $FILE doesn't exist"
elif [ $(wc -l < "$FILE") -lt $LINE ]; then
  echo "BROKEN: $FILE only has $(wc -l < $FILE) lines, reference to line $LINE"
fi

Phase 6: Generate Report

Output Format

📅 Documentation Currency Report

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

STALE STATUS MARKERS

⚠️ STALE: "CRITICAL ISSUE" in PROJECT.md:181 (90 days old)
   Context: Tool calling duplication
   Age: 90 days (threshold: 30 days)
   Status: Issue was SOLVED in commit 2e8237c (3 hours ago)

   Fix: Update status to SOLVED
   ```markdown
   ### Tool Calling (SOLVED)
   Status: SOLVED (2024-10-26)

⚠️ STALE: "TODO" in README.md:45 (180 days old) Context: Add authentication docs Age: 180 days (threshold: 90 days) Status: Auth docs exist in docs/guides/auth.md

Fix: Remove TODO or update to:

See: [Authentication Guide](docs/guides/auth.md)

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

VERSION LAG

⚠️ OUTDATED VERSION REFERENCE docs/guide.md:15 Referenced: v1.2.0 Current: v2.5.0 Age: 1 major version behind

Context: "Compatible with v1.2.0 and above"

Fix: Update to current version

Compatible with v2.0.0 and above

❌ CHANGELOG LAG CHANGELOG.md: v2.4.0 package.json: v2.5.0 Difference: 1 minor version

Fix: Add v2.5.0 entry to CHANGELOG.md

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

STALE "COMING SOON" CLAIMS

⚠️ IMPLEMENTED: "Image attachments (coming soon)" Location: README.md:67 Age: 240 days (8 months) Status: Implementation found in src/attachments.ts

Fix: Mark as complete

- ✅ Image attachments

⚠️ ABANDONED: "WebSocket support (roadmap)" Location: docs/roadmap.md:15 Age: 365 days (1 year) Status: No commits or code found

Fix: Either:

1. Remove from roadmap (if cancelled)
2. Update status if still planned

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

OUTDATED "LAST UPDATED" DATES

⚠️ INCORRECT DATE: PROJECT.md:3 Claimed: 2024-10-01 Actual: 2024-10-26 (25 days difference) Last commit: "docs: major architecture update"

Fix: Update date

Last Updated: 2024-10-26

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

BROKEN REFERENCES

❌ BROKEN LINK: README.md:35 Links to: docs/ARCHITECTURE.md Status: File not found

Possible fixes:

• File was renamed to docs/architecture/system-design.md
• Update link to correct path

❌ INVALID LINE REFERENCE: docs/guide.md:89 References: src/convert.ts:450 Status: src/convert.ts only has 412 lines

Fix: Update line number or remove reference

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

SUMMARY

Total issues: 9

• Stale markers: 2
• Version lag: 2
• Stale claims: 2
• Outdated dates: 1
• Broken references: 2

Currency Score: 65% (needs improvement)

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

RECOMMENDED ACTIONS

Priority 1 (Fix Today):

1. Update stale "CRITICAL ISSUE" markers
2. Fix broken references
3. Update "Last Updated" dates

Priority 2 (Fix This Week): 4. Mark implemented "coming soon" features as complete 5. Update CHANGELOG to match package.json version

Priority 3 (Next Sprint): 6. Review version references in guides 7. Clean up old TODOs

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

AUTO-FIX AVAILABILITY

✅ Can auto-fix:

• "Last Updated" dates (update to git log date)
• CHANGELOG version sync
• Broken reference paths (if file move detected)

⚠️ Needs review:

• Stale status markers (requires verification)
• "Coming soon" → "Complete" (needs testing)
• Version references (may be intentionally old)

❌ Manual fix required:

• Abandoned features (decision needed)
• Ambiguous broken links (multiple candidates)

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

---

## Edge Cases

### Case 1: Intentionally Old Version Reference

```markdown
# docs/migration-guide.md:15
Migrating from v1.x to v2.x

Detection: Context suggests intentional reference (migration guide, changelog)

Output:

ℹ️ INTENTIONAL: Old version reference detected
   Location: docs/migration-guide.md:15
   Referenced: v1.x
   Context: Migration guide (likely intentional)

   No action needed (skipped from stale count)

Case 2: Status Marker in Code Comment

// TODO: Refactor this function
function processData() { ... }

Detection: Marker in code file, not documentation

Action: Skip (code TODOs are different from documentation staleness)

Case 3: Long-Running "Coming Soon" That's Actually Active

# roadmap.md:25

🔄 Full IDE integration (coming soon)

# Check recent activity
git log --since="1 month ago" --grep="IDE"
# Found 5 commits in last month

Output:

✅ ACTIVE: "IDE integration" still in progress
   Age: 8 months
   Recent activity: 5 commits in last month
   Status: Not stale (active development)

   No action needed

Success Criteria

After running documentation currency check:

• ✅ All status markers validated against age thresholds
• ✅ Version references checked for currency
• ✅ "Coming soon" claims verified (implemented, cancelled, or active)
• ✅ "Last Updated" dates match git history
• ✅ Broken references detected and reported
• ✅ Completes in < 20 seconds for medium projects

Integration with /align-project

This is Phase 3 of /align-project:

Phase 1: Structural validation Phase 2: Semantic validation Phase 3: Documentation currency (THIS SKILL) Phase 4: Cross-reference validation

Automation Triggers

Auto-run when:

• /align-project command
• Before major releases
• Monthly scheduled check (if configured)

Alert thresholds:

• CRITICAL markers > 30 days old
• TODOs > 90 days old
• "Coming soon" > 180 days old
• Version lag > 1 major version

This skill ensures documentation doesn't rot over time, keeping project docs trustworthy and current.