docs(claude): remove session-handoff references from agent workflow

Author: ClaudiaFang

CLAUDE.md

@@ -4,11 +4,11 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Agent Workflow
 
-- **Startup**: read `feature_list.json` (active/next-up work; GitHub Issues on `firstsun-dev/git-files-sync`, Project #6, is the actual source of truth — re-sync before trusting stale entries) and `progress.md` (what's open right now), then `session-handoff.md` for the previous session's exact stopping point.
+- **Startup**: read `feature_list.json` (active/next-up work; GitHub Issues on `firstsun-dev/git-files-sync`, Project #6, is the actual source of truth — re-sync before trusting stale entries) and `progress.md` (what's open right now).
 - **Before editing**: run `./init.sh` (installs deps, then lint + test + build) to confirm you're starting from a green baseline.
 - **Definition of done**: `npx eslint .` has 0 errors, `npm run build` passes (includes the Obsidian 1.11.0 compat typecheck), and `npx vitest run` passes, *and* evidence of that run is recorded (one line: command + result) in `progress.md` or the PR description — not just claimed.
 - **Scope**: work one `feature_list.json` entry at a time; don't start the next until the current one's evidence is recorded.
-- **End of session**: overwrite `session-handoff.md` with the new stopping point, move finished items from `progress.md` into `archive/YYYY-MM.md` (current month).
+- **End of session**: move finished items from `progress.md` into `archive/YYYY-MM.md` (current month).
 - Issue/PR conventions (Conventional Commits titles, Project #6 fields, English-only for this public plugin repo) are defined in the `firstsun-pm` skill, not duplicated here.
 
 ## Development Commands