checkpointlisted

# Checkpoint `checkpoint` 保存、恢復、列出長 session 的工作狀態，讓 context compression 或換 session 後能接回 branch、ticket、phase、next action。 ## Contract Checkpoint 是 session continuity tool，不是 planning、triage、或 implementation skill。 它只寫 workspace memory / timeline 類的 local state，不替下游 skill 決定 scope，也不自動切 branch。 ## Mode Routing | User says | Mode | Reference | |---|---|---| | `checkpoint`, `存檔`, `save checkpoint`, `save state` | save | `checkpoint-save-flow.md` | | `resume`, `恢復`, `resume checkpoint`, `接回去` | resume | `checkpoint-resume-list-flow.md` | | `list checkpoints`, `列出存檔`, `show checkpoints` | list | `checkpoint-resume-list-flow.md` | Ambiguous input defaults to save. ## Reference Loading | Situation | Load | |---|---| | Any run | `polaris-project-dir.md`, `session-timeline.md`, `shared-defaults.md` | | Save | `checkpoint-save-flow.md`, `checkpoint-carry-forward-flow.md` | | Resume / list | `checkpoint-resume-list-flow.md` | ## Hard Rules - Save must capture branch, git status summary, ticket, todo disposition, phase, next action, and recent timeline context. - 回報 checkpoint saved 前，carry-forward validation 必須通過。 - Resume verifies the checkpoint branch exists before suggesting a switch. - 未取得使用者明確指示前，不切 branch、不 stash、不 rewrite memory。 - 不可默默丟掉 pending items；每項都要標記 done、carry-forward、或 dropped。 ## Completion Save 回傳 branch、ticket、phase、next action、resume phrase。Resume 回傳 checkpoint timestamp、branch、ticket、可取得時的 current status、next action。List 回傳 recent checkpoint rows。 ##