docs: remove deleted project docs skill requirement

.project-docs/05-agent-entry/context-checklist.md

@@ -2,14 +2,15 @@
 
 Before planning, confirm:
 
-- I know the task ID, mode, branch, worktree, base commit, and ownership result.
-- I read the active task record and know its scope.
+- I know the current branch, absolute worktree, base commit, Git status, and task scope.
+- For repository-changing work, I read or created the active task record and know its scope.
 - I know what this project is and what it is not.
 - I treat current-state as the last integrated snapshot rather than live concurrent state.
 - I checked active decisions and the architecture overview.
 - I identified task-specific docs that need deeper reading.
-- I inspected other local task records through `task_context.py status --json`.
+- I inspected `git worktree list --porcelain` and any available peer task records relevant to this scope.
 - I assessed code overlap separately from semantic or decision conflict.
 - I reported missing peer records as unknown coordination state.
 - I can name unknown, stale, or conflicting information.
 - I know which updates remain task-scoped and which require Integration Gate.
+- I did not rely on an external project-document Skill or task registry.