What problem does it solve? Hand-editing ptp's layered JSON configuration files risks malformed JSON, wrong-shape values, and clobbered keys. This Skill replaces manual editing with a guided, schema-aware flow that validates every input and performs a safe merge-write preserving all existing keys. ## Core Features & Use Cases - Guided three-step flow: Select a config layer (global, project, or workspace), pick a parameter from a 24-entry registry, then choose or enter a validated value. - Safe merge-write: Refuses to modify malformed or wrong-shape files, creates missing files and directories, and preserves every existing key including the deploy block. - Schema-aware validation: Enforces enum values, integer ranges, boolean literals, and string rules (e.g. repository-relative telemetry roots, GitHub login format for backlog owners). - Use Case: A user wants Codex reviews to be mandatory rather than optional. They run the config command, select the project layer, choose "Use Codex for review", pick required, and the Skill writes exactly that key without touching anything else. ## Quick Start Ask the assistant to open the ptp config editor and change a setting such as the Codex review mode or telemetry retention in the project config file.