feat: prepare ARR for controlled public deployment

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

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+# Planning Gate
+
+A coding agent must complete this gate before writing an implementation plan.
+
+## Required Output
+
+```md
+## Project Context Loaded
+
+Read:
+- {file path}
+
+Relevant understanding:
+- Project goal:
+- Current focus:
+- Active constraints:
+- Decisions affecting this task:
+- Evidence, reflections, or commitments affecting this task:
+- Files or modules likely involved:
+- Unknowns, stale docs, or conflicts:
+
+Gate result:
+- Passed or Blocked
+```
+
+## Pass Criteria
+
+The gate passes only when:
+
+- required documents were read
+- `memory-index.md` was checked when present
+- task-relevant decisions were checked
+- relevant evidence, reflection, and commitment indexes were checked when applicable
+- stale or conflicting docs were called out
+- the plan respects project positioning and constraints
+
+## Block Criteria
+
+Block planning when:
+
+- required documents are missing and cannot be inferred
+- current state conflicts with the user request
+- an existing decision appears to be violated
+- the task changes project positioning or architecture without human confirmation