Update project docs

Use this skill after completing any feature, fix, or migration to keep the three core project tracking files in sync.

Activate with: @update

Step 1: Get real dates

Run this first:

git log --date=short -n 10

Use actual commit dates. Never use placeholder dates or future months.

Step 2: Update TASK.md

Move completed items into ## Completed with the date:

- [x] Feature name (YYYY-MM-DD)
  - [x] Sub-task detail
  - [x] Sub-task detail

Add a session update note at the top of ## Current Status:

Session updates complete on YYYY-MM-DD.

If new work is queued, add it under ## To Do.

Step 3: Update changelog.md

Follow https://keepachangelog.com/en/1.0.0/ format. Add the new entry at the top under ## [Unreleased] or as a versioned release:

## [vX.Y.Z] - YYYY-MM-DD

### Added
- Feature name with key details

### Fixed
- Bug description and resolution

### Changed
- What changed and why

Version increment guide (check existing version in changelog.md first):

• New feature: bump minor (2.20.x -> 2.21.0)
• Bug fix or small improvement: bump patch (2.20.0 -> 2.20.1)

Step 4: Update files.md

Only update if new files were added or if existing file descriptions are outdated.

• Add new files to the correct table section
• Keep descriptions to 1-2 sentences, no emoji
• Focus on what the file does and any key implementation details

Checklist

Before calling this done, confirm:

• git log --date=short run to get real dates
• TASK.md completed section updated with date and sub-items
• changelog.md new entry added with real version and date
• files.md updated if new files exist

Notes

• This skill applies to this project. If the project you are working on does not have these exact files, adapt the steps to whatever tracking files exist.
• Do not create README.md, CONTRIBUTING.md, or other documentation files unless explicitly requested.