docs: remove deleted project docs skill requirement

.project-docs/05-agent-entry/planning-gate.md

@@ -1,12 +1,12 @@
 # Planning Gate
 
-A coding agent must complete this gate after the Concurrent Task Gate and before writing an implementation plan.
+A coding agent must complete this gate after the repository-local Concurrent Worktree Check and before writing an implementation plan.
 
 ## Peer Scope Check
 
-Run `task_context.py status --json`. For each other owner, read only the peer task record at `Path(owner.worktree) / owner.task_record`. Use its `Scope`, `Intent And Constraints`, and `Promotion Candidates` sections to assess overlap.
+Use `git worktree list --porcelain` to identify other local worktrees. When an available peer task record or committed branch diff is relevant, use its scope and promotion candidates to assess overlap.
 
-Do not inspect or modify arbitrary uncommitted files in another task's worktree. Report a missing or unreadable peer record as unknown coordination state; do not silently treat it as no overlap. Code-path overlap alone is a warning. Block when semantic decisions conflict or unresolved overlap could change the plan.
+Do not inspect or modify arbitrary uncommitted files in another task's worktree. A missing peer task record is not itself a blocker, but unresolved overlap that could change the plan is. Code-path overlap alone is a warning. Block when semantic decisions conflict or overlapping unknown changes cannot be preserved safely.
 
 ## Required Output
 
@@ -14,12 +14,13 @@ Do not inspect or modify arbitrary uncommitted files in another task's worktree.
 ## Project Context Loaded
 
 Task context:
-- Task ID:
-- Mode:
+- Task record, if any:
+- Mode, if applicable:
 - Branch:
 - Worktree:
 - Base commit:
-- Other active local tasks:
+- Existing changes:
+- Other relevant local worktrees:
 - Overlap or semantic-conflict assessment:
 
 Read:
@@ -43,8 +44,8 @@ Gate result:
 
 The gate passes only when:
 
-- task identity and worktree ownership are resolved
-- the active task record exists and matches the owner task ID
+- current branch, worktree, base commit, status, and task scope are resolved
+- the active task record exists for repository-changing work and matches the current scope
 - required documents were read
 - task-relevant decisions were checked
 - relevant evidence, reflection, and commitment indexes were checked when applicable
@@ -56,8 +57,8 @@ The gate passes only when:
 
 Block planning when:
 
-- worktree ownership is unresolved
-- an unowned worktree is dirty and has not been explicitly adopted by a human
+- the intended branch or worktree is unresolved
+- existing overlapping changes cannot be attributed or preserved safely
 - required worktree isolation failed or later operations cannot remain rooted there
 - required documents are missing or a concurrency upgrade is incomplete
 - current integrated state conflicts with the user request