AgentSession Porter: Cross-harness session mover for AI coding tools

Carry existing session context to a new coding agent tool without re-explaining your workspace

Problem

When developers want to try a new agent harness, existing sessions are hard to migrate, so they stick with the old tool. After switching, repeated context is lost, the new tool has to re-learn the workspace, and time and tokens are wasted. When several sessions exist for the same task, comparing them is also difficult.

Solution

A local CLI that exports a coding agent's session (message history, tool call records, workspace context summary) and converts it into a format the target harness can read, so the same task continues in the new tool. It also provides a session diff view to help compare harnesses.

Users

Developers using multiple AI coding agents, agent tool early adopters, teams comparing harness effectiveness

MVP

Session export/import for 2-3 major harnesses; automatic workspace context summarization; one-line CLI migration; session diff view;

Revenue

Open-source CLI plus paid desktop app (visual management, bulk migration, team session library); or per-seat subscription

Why now

Agent harnesses are exploding and switching costs are a real pain, but formats are fragmented — an indie can build a neutral conversion layer; scope is manageable for a 2-4 week MVP.