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Agent skill

Timing Analysis

by FastLED in FastLED/FastLED

Analyze real-time constraints, ISR latency, DMA transfer times, and LED protocol timing for embedded systems.

MITAuto-check passedDevelopment

Install Timing Analysis

skills CLI
$ npx skills add FastLED/FastLED --skill timing-analysis -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install FastLED/FastLED timing-analysis --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/FastLED/FastLED.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/timing-analysis .claude/skills/timing-analysis && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
timing-analysis
GitHub stars
7.5k
Token cost
~484 tokens
SKILL.md length
169 words
Files
1
Skills in repo
23
Repo updated
First seen
Licence
MIT

At a glance

Analyze real-time constraints, ISR latency, DMA transfer times, and LED protocol timing for embedded systems.

  • Debugging timing-sensitive code
  • SKILL.md covers What This Skill Analyzes, How To Use and What You'll Get
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Optimizing frame rates

What it does

Timing Analysis is an agent skill from FastLED/FastLED. Analyze real-time constraints, ISR latency, DMA transfer times, and LED protocol timing for embedded systems. Use when debugging timing-sensitive code, optimizing frame rates, or verifying protocol compliance.

Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Embedded systems. The repository describes itself as: The FastLED library for colored LED animation on Arduino. Please direct questions/requests for help to the FastLED Reddit community: http://fastled.io/r We'd like to use github… The licence is MIT.

When your agent uses it

  • Debugging timing-sensitive code
  • Optimizing frame rates
  • Verifying protocol compliance

Example prompts

  • “/timing-analysis”

What it can do on your machine

Read from SKILL.md and the folder at commit 8d6ed12. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Timing Analysis loads about 484 tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 169 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~56
When it runs · the whole SKILL.md, loaded when a task matches
~484

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from FastLED/FastLED at commit 8d6ed12, republished under its MIT licence (© FastLED). 169 words, ~484 tokens.

Download SKILL.mdSave it as .claude/skills/timing-analysis/SKILL.md (or your agent's skills folder).
name
timing-analysis
description
Analyze real-time constraints, ISR latency, DMA transfer times, and LED protocol timing for embedded systems. Use when debugging timing-sensitive code, optimizing frame rates, or verifying protocol compliance.
argument-hint
<component, function, or timing issue to analyze>
context
fork
agent
timing-analysis-agent

Analyze timing-critical code paths for real-time constraint violations and optimization opportunities.

$ARGUMENTS

What This Skill Analyzes

LED Protocol Timing
  • WS2812/SK6812/APA106 bit timing compliance (T0H, T0L, T1H, T1L, reset)
  • SPI clock rate calculations for wave8 encoding
  • RMT resolution and duration encoding accuracy
  • Reset pulse duration adequacy across chipsets
Frame Rate Analysis
  • Total frame time budget (show() to DMA complete to reset delay)
  • Per-LED encoding time multiplied by LED count = encoding phase duration
  • DMA transfer time at configured clock rate
  • Inter-frame gap and CPU availability
ISR Latency
  • Interrupt response time constraints
  • ISR execution time (must be <10us for most applications)
  • Priority inversion risks from ISR-held resources
  • Nested interrupt handling
DMA Transfer Timing
  • Transfer size multiplied by clock period = transfer duration
  • Double-buffer swap timing and pipeline stalls
  • Chunk encoding overlap with DMA transmission
  • SPI/I2S/RMT peripheral clock configuration

How To Use

/timing-analysis src/platforms/esp/32/drivers/spi/
/timing-analysis What is the maximum frame rate for 300 WS2812 LEDs on ESP32-S3 using SPI?
/timing-analysis Check if the RMT timing meets WS2812 spec

What You'll Get

  • Timing breakdown with calculated durations (ns/us/ms precision)
  • Protocol compliance verification against LED chipset datasheets
  • Frame rate estimates for given LED counts
  • Bottleneck identification and optimization suggestions
  • Clock configuration recommendations

© FastLED, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/timing-analysis of FastLED/FastLED.

Open the folder on GitHubat commit 8d6ed12

Compare with similar skills

Timing Analysis next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Timing Analysis compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Timing Analysis this skillFastLED/FastLED7.5k—~484Automated safety check: PassMIT
Authoring VPhone Patch SetsLakr233/vphone-cli15k—~4.6kAutomated safety check: PassMIT
Sipeed I2C and SPI Hardware Controlsipeed/picoclaw30k—~578Automated safety check: PassMIT
RuView Hardware Setupruvnet/RuView97k—~1.8kAutomated safety check: NotesMIT
Esp32 Firmware Engineeralxv2016/folloup-sticky1151 repos~3.8kAutomated safety check: PassGPL-3.0
ExecuTorch Binary Size Reductionpytorch/executorch5.1k—~793Automated safety check: PassCustom licence

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More from FastLED/FastLED

All 23 skills in this repo

  • CI Fix

    FastLED/FastLED

    Scan all CI builds and tests, find failures, fetch error logs, and fix the code.

    7.5k GitHub stars~897 tokensUpdated today
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  • Driver Review

    FastLED/FastLED

    Review and implement hardware driver code — DMA safety, interrupt correctness, timing constraints, peripheral register usage, channel drivers, and peripheral mock implementations.

    7.5k GitHub stars~3.1k tokensUpdated today
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  • Embedded Debug

    FastLED/FastLED

    Firmware crash analysis, stack trace decoder, and register dump interpreter for ESP32/ARM/AVR platforms.

    7.5k GitHub stars~1.4k tokensUpdated today
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  • Esp32 Log Triage

    FastLED/FastLED

    Parse and classify ESP32 serial log output to identify FastLED-related errors, RMT/I2S/SPI driver faults, timing violations, RTOS issues, and crash signatures.

    7.5k GitHub stars~1.9k tokensUpdated today
    Auto-check passed

  • Memory Audit

    FastLED/FastLED

    Audit embedded code for stack overflow risks, heap fragmentation, static allocation patterns, and memory leaks.

    7.5k GitHub stars~488 tokensUpdated today
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  • Platform Port

    FastLED/FastLED

    Guide porting FastLED to new MCU platforms, including int.h types, clockless drivers, SPI implementations, and platform detection.

    7.5k GitHub stars~580 tokensUpdated today
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Categories

Questions about Timing Analysis

What does Timing Analysis do?

Analyze real-time constraints, ISR latency, DMA transfer times, and LED protocol timing for embedded systems. Timing Analysis is an agent skill from FastLED/FastLED. Analyze real-time constraints, ISR latency, DMA transfer times, and LED protocol timing for embedded systems.

When should I use Timing Analysis?

Timing Analysis fits situations like: debugging timing-sensitive code; optimizing frame rates; verifying protocol compliance.

How do I install Timing Analysis in Claude Code?

Run `npx skills add FastLED/FastLED --skill timing-analysis -a claude-code`. Or copy the skill folder (.claude/skills/timing-analysis in FastLED/FastLED) into .claude/skills/timing-analysis in your project. Claude Code loads it when a task matches its description.

How do I install Timing Analysis in Codex?

Run `npx skills add FastLED/FastLED --skill timing-analysis -a codex`. Or copy the skill folder (.claude/skills/timing-analysis in FastLED/FastLED) into .agents/skills/timing-analysis in your project. Codex loads it when a task matches its description.

Can I use Timing Analysis in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add FastLED/FastLED --skill timing-analysis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/timing-analysis, .gemini/skills/timing-analysis, .github/skills/timing-analysis and .opencode/skills/timing-analysis in your project.

What does Timing Analysis need to run?

SKILL.md names no scripts, command-line tools or credentials: Timing Analysis is instructions for the agent only.

Does Timing Analysis access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Timing Analysis safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Timing Analysis use?

Timing Analysis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Timing Analysis use?

About 484 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Timing Analysis?

Skills that share tags, products or a category with Timing Analysis: Authoring VPhone Patch Sets (Lakr233/vphone-cli, 15k stars), Sipeed I2C and SPI Hardware Control (sipeed/picoclaw, 30k stars), RuView Hardware Setup (ruvnet/RuView, 97k stars) and Esp32 Firmware Engineer (alxv2016/folloup-sticky, 115 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Timing Analysis?

FastLED (a GitHub organization) maintains it in FastLED/FastLED, which has 7,506 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on October 7, 2026.

Source: FastLED/FastLED on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.