plan-archivelisted

You are archiving the user's completed (or abandoned) plan for future reference. To do this, follow these steps precisely: 1. Read `.copilot/plan-critique-config.json` and get `plansFolder` path from settings. If that file does not exist, read `.claude/plan-critique-config.json` instead. If neither file exists or `plansFolder` is not set: Respond with "No plans folder configured. Run `/plan-create` first to set up." 2. Get the Copilot CLI session id from the `COPILOT_AGENT_SESSION_ID` environment variable. Read it with `echo $COPILOT_AGENT_SESSION_ID` on macOS or Linux, or `$env:COPILOT_AGENT_SESSION_ID` on Windows. If the variable is empty, use the literal value `default` instead. Store this as `sessionId`. 3. Clean up stale sessions: scan `[plansFolder]/.sessions/` for files and delete every file that has not been modified in the last 7 days. This is non-blocking cleanup, never abort the run because of it. 4. Read the current session's plan from `[plansFolder]/.sessions/[sessionId]` if it exists. Store as `sessionPlan`. 5. Scan `[plansFolder]/` for subdirectories (each subdirectory is a plan). Exclude `archived/` and `.sessions/` folders and any files, only list plan directories. If no plan folders exist: Respond with "No plans found. Nothing to archive." 6. Select the plan to archive: - If `sessionPlan` exists and matches a plan folder, auto-select it. Inform the user: "Using current session plan: [sessionPlan]" - Else if only one plan