diff-local

A command that compares uncommitted changes in Mendix application files with a Git commit, branch, tag, or the current HEAD. Mendix is a low-code platform, and Git references are saved versions of the project.

In plain words
What is it for?
Use it to inspect changes in an MPR v2 Mendix application, compare them with an earlier version, or review microflow edits.
Why use it?
It makes local changes easier to review before they are committed. You can choose unified, structural, or side-by-side output.

Command for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/mendixlabs/mxcli/diff-local
Clone the repo
git clone --depth 1 https://github.com/mendixlabs/mxcli

Made for: Claude Code.

Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 893 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00018 $0.00893
Opus 5 $0.00009 $0.00447
Sonnet 5 $0.00004 $0.00179
Haiku 4.5 $0.00002 $0.00089

Measured yesterday against content hash 128824eeb016, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

diff-local scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/commands/mendix/diff-local.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Diff Local Changes

Compare local (uncommitted) changes in mxunit files against a git reference to see what has changed.

Note: This command only works with MPR v2 format (Mendix 10.18+) which stores units in the mprcontents/ folder.

Commands

# Show uncommitted changes vs HEAD (default)
mxcli diff-local -p app.mpr

# Compare against a specific commit
mxcli diff-local -p app.mpr --ref HEAD~1

# Compare against a branch
mxcli diff-local -p app.mpr --ref main

# Compare against a tag
mxcli diff-local -p app.mpr --ref v1.0.0

# With structural format
mxcli diff-local -p app.mpr --format struct

# Side-by-side comparison
mxcli diff-local -p app.mpr --format side

# With color output
mxcli diff-local -p app.mpr --color

Output Formats

Unified (default)

Traditional diff format showing + for additions and - for removals:

--- Microflow.MyModule.ProcessOrder (current)
+++ Microflow.MyModule.ProcessOrder (script)
@@ -1,5 +1,6 @@
 CREATE MICROFLOW MyModule.ProcessOrder (
   $order: MyModule.Order
+  $discount: Decimal
 )
 RETURNS Void

Side-by-Side (--format side)

Two-column comparison showing git vs local:

Microflow.MyModule.ProcessOrder
──────────────────────────────────────────────────────────────────
Current                              │ Script
──────────────────────────────────────────────────────────────────
  $order: MyModule.Order             │   $order: MyModule.Order
                                     │   $discount: Decimal         +

Structural (--format struct)

Summary of changes by element type:

Microflow: MyModule.ProcessOrder
  + Parameter $discount: Decimal
  ~ Lines: 2 lines added

Entity: MyModule.Customer
  + Attribute Phone: String(20)

How It Works

  1. Finds changed files: Uses git diff --name-status to identify modified .mxunit files in the mprcontents/ folder
  2. Reads both versions: Current version from disk, git version using git show
  3. Parses BSON: Extracts the unit type and content from the binary BSON format
  4. Generates MDL: Converts both versions to MDL for human-readable comparison
  5. Shows diff: Outputs the differences in the selected format

Read the full file on GitHub · 131 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 131 lines · 18 tokens per session scan A 128824eeb016

Subscribe to this mod's changes

diff-local is a command published in the GitHub repository mendixlabs/mxcli (115 stars, last pushed 2d ago), licensed Apache-2.0. It adds 18 tokens to every session and 893 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.