ir-drop-triage

Triage IR-drop and electromigration reports from power signoff tools into hotspot fixes.

26|8|Updated Jun 13, 2026
One-click install
npx skills add https://github.com/vibeic/vibe-ic --skill ir-drop-triage-vibeic
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ir-drop-triage
Source: https://github.com/vibeic/vibe-ic/tree/main/vibe-ic-marketplace/plugins/vibe-ic/skills/ir-drop-triage
Command: npx skills add https://github.com/vibeic/vibe-ic --skill ir-drop-triage-vibeic

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Power integrity failures can turn a timing-clean chip into a field failure, and raw IR-drop/EM reports from signoff tools are hard to interpret. This Skill reads those reports, pinpoints hot regions, classifies root causes deterministically, and proposes concrete power-grid fixes. ## Core Features & Use Cases - Deterministic budget checking: Computes the IR-drop budget (5–10% of Vdd) and passes or fails the worst-case measured drop via ir_drop_budget_check.py. - Cause classification and fix mapping: Runs a fixed 4-cause threshold ladder (weak via, sparse straps, switching cluster, narrow metal) and maps each cause to a fix such as add_straps, add_decap, widen_metal, or add_via_array. - Use Case: After routing a design, you run OpenROAD PSM and get a worst-case IR drop report. Use this Skill to classify each hotspot, generate a power/ir_triage.md report with fix tables and P&R script snippets, and hand off PDN changes to the flow orchestrator. ## Quick Start Analyze the IR-drop report from my latest OpenROAD PSM run and triage the hotspots into a fix plan.

Frequently Asked Questions about ir-drop-triage

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I triage IR drop violations in a chip design?▼

Run the IR-drop analysis in your signoff tool, then feed the report through this Skill. It checks the worst-case drop against a 5–10% of Vdd budget, classifies each hotspot into one of four causes, and emits a fix table with P&R script snippets.

What tools does IR drop analysis support?▼

The Skill reads reports from commercial signoff tools including Ansys RedHawk, Cadence Voltus, and Synopsys PrimePower, plus the open-source OpenROAD PSM power grid solver. Sign-off stays in those tools; this Skill is the triage layer.

Why does OpenROAD PSM fail with a connectivity check error?▼

PSM-0069 connectivity failures usually mean the PDN uses only followpins with no cross-row connections, leaving each row's rail isolated. Fix it by adding Metal4 power stripes and an add_pdn_connect statement linking the rail and stripe layers.

What is an acceptable IR drop budget for tapeout?▼

The Skill enforces a budget of 5–10% of Vdd, with 10% as the permissive default. The deterministic checker computes budget_mV from the percentage and fails if the worst-case measured drop meets or exceeds it.

When should I not rely on this Skill for power signoff?▼

This Skill is a triage and copilot layer, not a signoff tool. Final power integrity sign-off must still be performed in commercial tools like RedHawk or Voltus, especially for EM-limited nets requiring judgment on routing resources and congestion.