Handing Off Claude Code Sessions to Another Developer
When someone else needs to continue work that Claude started, here's what to document and how to do the handoff cleanly.
Code produced in a Claude session has a specific challenge for handoffs: the context that guided the decisions lives in the conversation, not in the code. When another developer picks it up, they're missing the "why" behind the choices.
Here's how I handle handoffs from Claude-assisted work.
Write a session summary before closing out
Before ending a significant Claude Code session, I ask Claude to write a summary: "Write a handoff note covering what we built, the decisions we made and why, what's incomplete, and what the next developer should know before continuing."
Claude produces a useful document. I edit it to add anything it missed. The result goes into the PR description or a HANDOFF.md file in the branch.
Document the decisions that aren't obvious from the code
The code shows what was done. The handoff note should explain:
- Alternatives that were considered and rejected
- Constraints that shaped the approach (performance requirements, API limitations, backward compatibility)
- Things that were intentionally simplified and would need to be expanded later
- Edge cases that are known but not yet handled
This is the context that would normally live in someone's head after a coding session. Externalizing it is important when the "someone" is a conversation with an AI.
Mark incomplete work clearly
If a session ended with things unfinished, they should be marked with TODO comments that include enough context to pick them up: not just "TODO: add validation" but "TODO: validate that endDate is after startDate — currently only checking that both dates are present."
Claude writes good TODO comments when you ask it to include context. "Add TODO comments for anything incomplete, with enough detail that someone reading the code can understand what needs to happen without asking questions" produces usable output.
For larger handoffs: write a brief architectural note
For features that touched multiple files or introduced new patterns, a one-page architectural note is worth it. What pattern was used and where did it come from? What does the data flow look like? What are the extension points if the feature needs to grow?
Claude can draft this too. It's familiar with the code it wrote and will produce a reasonable first draft of the architecture note.