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embedded-data-parsing-libs

Use when integrating, porting, configuring, or debugging embedded C data parsers such as cJSON, jsmn, or inih on MCU projects

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Overview

Use when integrating, porting, configuring, or debugging embedded C data parsers such as cJSON, jsmn, or inih on MCU projects

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Embedded Data Parsing Libs

Overview

Use this skill for small embedded data parsers where the main risks are memory allocation, input bounds, encoding assumptions, recursion, and callback handling. Cover cJSON, jsmn, and inih without copying their full APIs.

When To Use

Use this skill when:

The user wants to parse JSON or INI on an MCU.
The task mentions cJSON, jsmn, inih, config files, telemetry JSON, command payloads, or settings parsing.
The issue involves parse failure, memory leak, heap exhaustion, malformed input, callback mapping, or stack/recursion limits.

Do not use this skill for binary protocols or large streaming parsers outside these small libraries.

First Questions

Ask for:

Parser library: cJSON, jsmn, inih, or another small C parser.
Input source and maximum input size.
Runtime: bare metal, RTOS, Linux, bootloader, or shell command.
Whether dynamic allocation is allowed.
Expected schema and how malformed input should behave.
Current error, sample input, and memory budget.

Library Checks

cJSON

Decide whether heap allocation is acceptable.
Provide custom malloc/free hooks if the project uses a custom allocator.
Always delete parsed trees after use.
Bound input size before parsing.
Validate type before reading values.

jsmn

Allocate enough tokens for the expected JSON shape.
Handle JSMN_ERROR_NOMEM, JSMN_ERROR_INVAL, and JSMN_ERROR_PART.
Remember that tokens reference the original input buffer.
Validate string lengths and value types manually.

inih

Implement the handler callback with strict section/key matching.
Decide whether duplicate keys overwrite, error, or merge.
Bound line length and input source.
Validate converted numeric values and ranges.

Common Failures

Heap fragmentation from repeated cJSON_Parse without hooks or cleanup.
Token buffer too small for jsmn.
Using JSON token pointers after the input buffer is freed.
Accepting partial config and booting with unsafe defaults.
Silent typo in INI key because handler ignores unknown fields.

Verification

Before claiming parser integration works:

State parser, allocation policy, max input size, and schema assumptions.
Test valid input, missing fields, wrong types, malformed input, and oversize input.
Confirm memory is released or static buffers are bounded.
Confirm unknown fields and duplicate keys behavior.

Example

User:

想用 cJSON 解析串口发来的配置。

Agent:

Asks for max payload size, schema, allocator policy, and malformed-input behavior.
Uses custom hooks if needed and validates each field type.
Tests good JSON, missing keys, bad types, and oversized payloads.

View source ↗

File metadata

name: embedded-data-parsing-libs
description: Use when integrating, porting, configuring, or debugging embedded C data parsers such as cJSON, jsmn, or inih on MCU projects

View original text

---
name: embedded-data-parsing-libs
description: Use when integrating, porting, configuring, or debugging embedded C data parsers such as cJSON, jsmn, or inih on MCU projects
---

# Embedded Data Parsing Libs

## Overview

Use this skill for small embedded data parsers where the main risks are memory allocation, input bounds, encoding assumptions, recursion, and callback handling. Cover `cJSON`, `jsmn`, and `inih` without copying their full APIs.

## When To Use

Use this skill when:

- The user wants to parse JSON or INI on an MCU.
- The task mentions `cJSON`, `jsmn`, `inih`, config files, telemetry JSON, command payloads, or settings parsing.
- The issue involves parse failure, memory leak, heap exhaustion, malformed input, callback mapping, or stack/recursion limits.

Do not use this skill for binary protocols or large streaming parsers outside these small libraries.

## First Questions

Ask for:

- Parser library: `cJSON`, `jsmn`, `inih`, or another small C parser.
- Input source and maximum input size.
- Runtime: bare metal, RTOS, Linux, bootloader, or shell command.
- Whether dynamic allocation is allowed.
- Expected schema and how malformed input should behave.
- Current error, sample input, and memory budget.

## Library Checks

### cJSON

- Decide whether heap allocation is acceptable.
- Provide custom malloc/free hooks if the project uses a custom allocator.
- Always delete parsed trees after use.
- Bound input size before parsing.
- Validate type before reading values.

### jsmn

- Allocate enough tokens for the expected JSON shape.
- Handle `JSMN_ERROR_NOMEM`, `JSMN_ERROR_INVAL`, and `JSMN_ERROR_PART`.
- Remember that tokens reference the original input buffer.
- Validate string lengths and value types manually.

### inih

- Implement the handler callback with strict section/key matching.
- Decide whether duplicate keys overwrite, error, or merge.
- Bound line length and input source.
- Validate converted numeric values and ranges.

## Common Failures

- Heap fragmentation from repeated `cJSON_Parse` without hooks or cleanup.
- Token buffer too small for `jsmn`.
- Using JSON token pointers after the input buffer is freed.
- Accepting partial config and booting with unsafe defaults.
- Silent typo in INI key because handler ignores unknown fields.

## Verification

Before claiming parser integration works:

- State parser, allocation policy, max input size, and schema assumptions.
- Test valid input, missing fields, wrong types, malformed input, and oversize input.
- Confirm memory is released or static buffers are bounded.
- Confirm unknown fields and duplicate keys behavior.

## Example

User:

```text
想用 cJSON 解析串口发来的配置。
```

Agent:

1. Asks for max payload size, schema, allocator policy, and malformed-input behavior.
1. Uses custom hooks if needed and validates each field type.
1. Tests good JSON, missing keys, bad types, and oversized payloads.

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

License: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
Low GitHub adoption signal
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 31 GitHub stars
Stars/forks activity: 31 stars, 2 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.

2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

More details

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Creator: easyzoom
Source: easyzoom/aix-skills
Indexed by: OpenAgentSkill community index

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Overview

Embedded Data Parsing Libs

Overview

When To Use

First Questions

Library Checks

cJSON

jsmn

inih

Common Failures

Verification

Example

Review the source

Start with one small task

Source & usage notes

Agent access

Related skills

For the creator

Registry indexed

Claim this skill listing

Add the evidence badges to your README

Community signal