Context Manager Task 6 Fix 2 Report

Status

Done. Fixed the remaining branch rehydration and /ctx-mode persistence regressions and verified them with targeted and full test runs.

Updated .pi/agent/extensions/context-manager/index.ts rehydration to restore the latest valid snapshot ledger as the base state and replay only tracked messages that occur after that snapshot entry.
Kept empty-ledger startup behavior when a branch has no valid snapshot.
Preserved live in-memory mode changes during turn_end so /ctx-mode aggressive wins over an older persisted snapshot mode before the next snapshot is appended.
Strengthened .pi/agent/extensions/context-manager/src/extension.test.ts with integration-style regressions for:
- session_tree on a snapshot-only branch producing a hidden packet from snapshot-backed ledger state.
- /ctx-mode aggressive persisting mode: "aggressive" and the corresponding aggressive-zone token classification on the next turn_end.

cd /home/alex/dotfiles/.worktrees/context-manager-extension/.pi/agent/extensions/context-manager && npx tsx --test src/extension.test.ts ✅
cd /home/alex/dotfiles/.worktrees/context-manager-extension/.pi/agent/extensions/context-manager && npm test ✅

Snapshot-only branches now retain snapshot ledger contents for packet injection and command inspection instead of dropping to an empty ledger.
Rehydration no longer replays pre-snapshot transcript entries, which avoids rebuilding stale state on top of a newer snapshot.
The /ctx-mode fix is narrowly scoped to turn_end; public commands and extension hook API stay unchanged.

None with the fix itself.
The worktree still contains unrelated untracked historical review files under .pi/reviews/; they were left untouched and excluded from the focused commit.