What problem does it solve? When running multi-step AI development workflows, there is no visibility into what each run actually cost in tokens, time, and requests. This Skill opens and closes a measurement window around a run and reports the full usage breakdown without ever blocking the work itself. ## Core Features & Use Cases - Run window measurement: A start marker records when a run began, and report measures the window from that marker to the present moment. - Detailed usage table: Emits a markdown table with elapsed time, run time, token totals split across main agent and subagents, request counts, and output throughput. - Durable logging and tracker integration: Appends one line to a persistent usage log and writes the figures into the feature tracker's stage panel via anchored HTML tokens. - Failure-safe design: Every problem degrades to a single usage report skipped line, so reporting never fails, blocks, or aborts the calling skill. - Use Case: A feature-implementation run finishes and the user sees exactly how many tokens the main agent and its eval subagents consumed, how long it took, and the throughput, all logged for later comparison across features. ## Quick Start This Skill is invoked internally by other plugin skills with an argument like report feature-implement, tracker_file=<path>, outcome=completed and is not called directly by users.