environment-drift

CLI to debug "works on my machine" issues by detecting environment drift: runtimes, .env keys, Git, Docker, ports, DNS, TLS, PATH, timezone, and local services.

Find out why a repository won't build on this machine. Cross-platform developer-environment diagnostics, reproducibility snapshots, machine-to-machine diffs and AI-agent readiness. Read-only, no telemetry.

Compare .env files across environments, branches, and runtimes. Type-aware diffing, secret masking, git branch comparison, MCP server for AI agents. Zero dependencies.

It works on staging, so why not in production? Diagnoses environment drift for PMs: likely cause, checks to run yourself, and a handover note for engineering.

Git tracks your code. Runmark tracks what makes it run. Local-first dev environment observability, fingerprinting, and drift detection. Eliminate "works on my machine" forever.

Proof-carrying, privacy-first bug reports that compare working and failing developer environments.