Individual skill

protocol-analysis

Use when decoding I2C, SPI, or UART captures with sigrok or PulseView, checking bus traffic against a datasheet, or post-processing captures in Python. Not for bus drivers: use spi-i2c-baremetal.

.devin/skills/protocol-analysis/SKILL.md

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Last checked: Nov 4, 2026

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Repository stars (not skill ratings): 55
Repository last updated: Sep 28, 2026
License: Apache-2.0

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# Protocol analysis (I2C / SPI / UART)

## Contract

| Field | Bound contract |
|---|---|
| Trigger | A serial bus capture needs decoding, a device does not answer on I2C/SPI/UART, or a logic-analyzer capture needs correlation with the firmware driver. |
| Authority | Read-only. Emits analysis and commands for the operator to run on the capture setup; no file writes, no rollback needed. No remote mutation. |
| Side effect | Capture and decode commands plus a verdict in chat. Nothing is written. |
| Done | The bus fault is named (wrong address, wrong mode, missing pull-up, baud drift) or the capture is confirmed clean against the datasheet. |

## Inputs

1. Capture or symptom (required): a sigrok/PulseView capture, a CSV export, or a description of the failing transaction.