docs: remove deleted project docs skill requirement

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

@@ -4,9 +4,9 @@ Use this gate to promote completed task facts into canonical project memory.
 
 ## Requirements
 
-- Run in an exclusively owned integration worktree.
-- Hold the repository integration lock.
-- For a single completed Feature, create the Integration worktree from that Feature commit so its task-owned records are already inside the Integration task's recorded base. Verify the target default branch is an ancestor or reconcile it explicitly before canonical edits; starting from the older default branch and then introducing another task's record will correctly fail the drift gate.
+- Run in an isolated integration worktree when concurrent edits may overlap. A user-requested direct governance update may run in the current worktree only after the repository-local worktree check confirms existing changes are known and non-overlapping.
+- Do not require or emulate an external integration lock; use Git worktree isolation, visible status, and explicit conflict checks.
+- For a single completed Feature, create the Integration worktree from that Feature commit so its task-owned records are already present. Verify the target default branch is an ancestor or reconcile it explicitly before canonical edits.
 - Verify the task commits being integrated are present.
 - Review source task records, task-prefixed supporting records, promotion candidates, and semantic conflicts in read-only mode.
 - Write integration notes only to the integration task's own task record or `{task_id}__<slug>.md` supporting records.