v1.1.0

ProjectionLab MCP 1.1.0

New tools for comparing and deleting plans, a field reference for safer
edits, and clearer guidance for assistants. The browser extension works with
this server at 1.0.1 or 1.1.0 (the wire protocol is unchanged).

New

• projectionlab_diff shows field-level changes between two snapshots, a
  snapshot and the live data, or two plans (planA and planB). It is
  read-only, so it works in read-only mode.
• projectionlab_delete_plan deletes a plan by exact ID. It is a dry run
  until confirmed, snapshots first, and refuses to delete the last plan.
• Data model resource (projectionlab://data-model): field meanings,
  units, and allowed values for ProjectionLab 4.6.0. listPaths reads carry
  these annotations, and writes refuse values outside a confirmed option list.
• writesEnabled in projectionlab_check_connection, so the assistant
  knows whether changes are turned on before it offers one.
• Rollback by recency or time: choose a snapshot with nBack or
  beforeTime as well as snapshotId.
• Confirmed writes return their snapshotId, so the backup taken before a
  change can be found directly.

Improved

• Real estate in Current Finances and describe_schema is labeled with market
  value and loan balance separately.
• Plan copies and plan writes are verified more thoroughly against what
  ProjectionLab saved, including Current Finances.
• Plan-to-plan diffs ignore each event's random internal key.
• Delete, plan-write verification, and net worth match ProjectionLab 4.6.0.
• The server exits when the MCP host closes its connection.

Guidance for assistants

• Assistants describe change previews in plain words (plan, item, old and new
  value) rather than showing JSON.
• The guide covers units and rate scales (inflation is stored in percentage
  points), with worked write-tool examples.
• The knowledge resource is limited to concepts and links to ProjectionLab
  help articles; yearly tax figures are left to ProjectionLab.
• The guide explains that the export is stored data, not the app's logic, and
  that a one-time event's stored end date is ignored.

Fixes and security

• Fixes from an audit: clone verification, asset values, redaction of plan
  reads, and a crash before authentication.
• The extension and bootstrap snippet run only the Plugin API methods the wire
  protocol defines.
• zod upgraded to 4.6.7 and @hono/node-server to 2.1.6. npm audit reports
  no vulnerabilities.

Documentation

• The README leads with setup: one prompt to paste into your assistant.
• New Manual setup,
  Setup for AI assistants,
  and Technical reference
  pages.

Install

• Server: npx -y projectionlab-mcp (see the README).
• Extension: download the zip for your browser below and load it unpacked, or
  install from the Chrome Web Store or Firefox Add-ons once listed.