New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Sequence Diagram

by mohitagw15856 in mohitagw15856/pm-claude-skills

Diagram an interaction as a sequence of messages between participants over time.

MITAuto-check passedDevelopment

Install Sequence Diagram

skills CLI
$ npx skills add mohitagw15856/pm-claude-skills --skill sequence-diagram -a claude-code

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

GitHub CLI
$ gh skill install mohitagw15856/pm-claude-skills sequence-diagram --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/mohitagw15856/pm-claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/sequence-diagram .claude/skills/sequence-diagram && 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
sequence-diagram
GitHub stars
1.4k
Token cost
~762 tokens
SKILL.md length
322 words
Files
1
Skills in repo
1,348
Repo updated
First seen
Licence
MIT

At a glance

Diagram an interaction as a sequence of messages between participants over time.

  • Asked to show an API flow
  • SKILL.md covers Required Inputs, Output Format, Mermaid Rules (so it renders) and Quality Checks, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Request/response

What it does

Sequence Diagram is an agent skill from mohitagw15856/pm-claude-skills. Diagram an interaction as a sequence of messages between participants over time. Use when asked to show an API flow, request/response, auth handshake, integration, or 'what calls what in what order'. Produces a ready-to-render Mermaid sequence diagram (renders live, exportable as PNG/SVG) plus notes on edge cases and failure paths.

Its SKILL.md is about 760 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 Diagrams. It works with Mermaid. The repository describes itself as: 1255 professional Agent Skills for Claude, ChatGPT, Gemini, Cursor & Codex — PRDs, postmortems, leases, medical bills, layoffs, go-bags, new countries. Plain markdown, MIT, in… The licence is MIT.

When your agent uses it

  • Asked to show an API flow
  • Request/response
  • What calls what in what order

Example prompts

  • “what calls what in what order”
  • “/sequence-diagram”

What it can do on your machine

Read from SKILL.md and the folder at commit 1cbf1f0. 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 (its code samples are mermaid).

    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

Sequence Diagram loads about 762 tokens when it runs. Until then it costs about 88 tokens; SKILL.md has 322 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~88
When it runs · the whole SKILL.md, loaded when a task matches
~762

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 mohitagw15856/pm-claude-skills at commit 1cbf1f0, republished under its MIT licence (© mohitagw15856). 322 words, ~762 tokens.

Download SKILL.mdSave it as .claude/skills/sequence-diagram/SKILL.md (or your agent's skills folder).
name
sequence-diagram
description
Diagram an interaction as a sequence of messages between participants over time. Use when asked to show an API flow, request/response, auth handshake, integration, or 'what calls what in what order'. Produces a ready-to-render Mermaid sequence diagram (renders live, exportable as PNG/SVG) plus notes on edge cases and failure paths.

Sequence Diagram Skill

When the question is "in what order do these things talk to each other?", a sequence diagram is the clearest answer. This skill turns a described interaction — an API call chain, an auth handshake, a webhook flow — into a correct Mermaid sequence diagram with participants, ordered messages, return values, and the important error/timeout paths.

Required Inputs

Ask for these only if they aren't already provided:

  • The participants — the actors/services/systems involved (client, API, DB, third party…).
  • The messages — what each one sends to the next, in order; what comes back.
  • Sync vs async — which calls block on a response vs fire-and-forget.
  • Edge cases — the failure, timeout, or alternative path worth showing.

Output Format

[Interaction name] — sequence

One line on what flow this traces.

mermaid
sequenceDiagram
    actor U as User
    participant W as Web app
    participant A as API
    participant D as Database
    U->>W: Click "Sign in"
    W->>A: POST /login
    A->>D: Lookup user
    D-->>A: User record
    A-->>W: 200 + token
    W-->>U: Logged in
    Note over A,D: On miss, return 401

Notes — failure/timeout handling, retries, idempotency, anything async (-) ).

Mermaid Rules (so it renders)

  • Start with sequenceDiagram. Declare participant X as Label (or actor) up front.
  • Solid arrow ->> = call/request; dashed -->> = response/return; -) = async message.
  • Use Note over A,B: ... for context and alt/else/end for alternative paths if needed.
  • Keep message text short; no colons that aren't the message separator.

Quality Checks

  • Participants are declared and ordered to match the real call flow
  • Requests and responses are distinguished (solid vs dashed arrows)
  • At least one failure/edge path is shown or noted (not just the happy path)
  • Sync vs async messages are visually distinct
  • The Mermaid block renders without edits

Anti-Patterns

  • Do not show only the happy path when a failure path matters — note the 401/timeout/retry
  • Do not blur requests and returns — use ->> vs -->>
  • Do not reorder messages for neatness — sequence order is the whole point
  • Do not put colons inside message text — it breaks parsing
  • Do not invent participants — model only the systems actually involved

Based On

UML sequence diagramming (lifelines, sync/async messages, alt fragments), expressed as renderable Mermaid.

Example Trigger Phrases

  • "Show this API flow as a diagram."
  • "Draw the auth handshake."
  • "What calls what in what order?"
  • "Diagram this integration."

© mohitagw15856, 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 skills/sequence-diagram of mohitagw15856/pm-claude-skills.

Open the folder on GitHubat commit 1cbf1f0

Compare with similar skills

Sequence Diagram 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.

Sequence Diagram compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sequence Diagram this skillmohitagw15856/pm-claude-skills1.4k—~762Automated safety check: PassMIT
Archify Diagramstt-a1i/archify81k—~2.9kAutomated safety check: PassMIT
Diagram Designcathrynlavery/diagram-design47k1 repos~7.5kAutomated safety check: PassMIT
Draw.io Diagram StudioAgents365-ai/drawio-skill10k—~2.4kAutomated safety check: NotesMIT
Pretty Mermaid Rendererimxv/Pretty-mermaid-skills1.5k—~2kAutomated safety check: PassMIT
Archify Diagram BuilderUnclecheng-li/AI_Animation1.5k2 repos~4.1kAutomated safety check: PassMIT

Similar skills

  • Archify Diagrams

    tt-a1i/archify

    Creates interactive architecture, workflow, sequence, data-flow and lifecycle diagrams as standalone HTML with inline SVG, themes and image or video export.

    81k GitHub stars~2.9k tokensUpdated today
    DevelopmentAuto-check passed

  • Diagram Design

    cathrynlavery/diagram-design

    Creates branded diagrams, from architecture, flowchart and sequence to charts and maps, as self-contained HTML with inline SVG, with import from draw.io, Mermaid and Excalidraw.

    47k GitHub starsUsed in 1 repo~7.5k tokens
    DevelopmentAuto-check passed

  • Draw.io Diagram Studio

    Agents365-ai/drawio-skill

    Creates and edits editable draw.io diagrams from descriptions, code, infrastructure files, SQL and API schemas, with sync, review, test and export tools.

    10k GitHub stars~2.4k tokensUpdated 7 days ago
    DevelopmentAuto-check: notes

  • Pretty Mermaid Renderer

    imxv/Pretty-mermaid-skills

    Writes and renders Mermaid diagrams as themed SVG, PNG or terminal ASCII and Unicode art with a bundled Node.js CLI that needs no browser.

    1.5k GitHub stars~2k tokensUpdated 1 mo ago
    DevelopmentAuto-check passed

  • Archify Diagram Builder

    Unclecheng-li/AI_Animation

    Builds validated architecture, workflow, sequence, data-flow and lifecycle diagrams as standalone interactive HTML from a small JSON spec, with optional motion and image export.

    1.5k GitHub starsUsed in 2 repos~4.1k tokens
    DevelopmentAuto-check passed

  • Mermaid

    WH-2099/mermaid-skill

    Generate Mermaid diagrams from user requirements. An agent skill from WH-2099/mermaid-skill.

    288 GitHub starsUsed in 4 repos~958 tokens
    DevelopmentAuto-check passed

More from mohitagw15856/pm-claude-skills

All 1,348 skills in this repo

  • Car Tco

    mohitagw15856/pm-claude-skills

    Compare the total cost of car ownership across buy-new, buy-used, lease, and keep-your-current-car — depreciation, insurance, maintenance ramp, and fuel over a real horizon, not just the monthly…

    1.4k GitHub stars~1.1k tokensUpdated yesterday
    Auto-check passed

  • Cs Health Scorecard

    mohitagw15856/pm-claude-skills

    Build a customer health scorecard for a specific account. An agent skill from mohitagw15856/pm-claude-skills.

    1.4k GitHub stars~2.4k tokensUpdated yesterday
    Auto-check passed

  • Exit Waterfall

    mohitagw15856/pm-claude-skills

    Compute who gets what at each exit price from a cap table — liquidation preferences, conversion points, and where the founders' share collapses.

    1.4k GitHub stars~1.1k tokensUpdated yesterday
    Auto-check passed

  • Feature Prioritisation

    mohitagw15856/pm-claude-skills

    Apply prioritisation frameworks (RICE, MoSCoW, Kano, ICE, Opportunity Scoring) to rank features and backlog items.

    1.4k GitHub stars~2k tokensUpdated yesterday
    Auto-check passed

  • Fire Number

    mohitagw15856/pm-claude-skills

    Compute a financial-independence (FIRE) target and years-to-reach with every assumption labeled as an assumption — plus a sensitivity table instead of a single false-precision answer.

    1.4k GitHub stars~1.1k tokensUpdated yesterday
    Auto-check passed

  • Freelance Rate

    mohitagw15856/pm-claude-skills

    Derive a freelance day/hourly rate backwards from target income, honest billable utilization, overhead, and the self-employment tax premium — the arithmetic that proves a rate is not salary÷2000.

    1.4k GitHub stars~1.2k tokensUpdated yesterday
    Auto-check passed

Works with

Categories

Questions about Sequence Diagram

What does Sequence Diagram do?

Diagram an interaction as a sequence of messages between participants over time. Sequence Diagram is an agent skill from mohitagw15856/pm-claude-skills. Diagram an interaction as a sequence of messages between participants over time.

When should I use Sequence Diagram?

Sequence Diagram fits situations like: asked to show an API flow; request/response; what calls what in what order.

How do I install Sequence Diagram in Claude Code?

Run `npx skills add mohitagw15856/pm-claude-skills --skill sequence-diagram -a claude-code`. Or copy the skill folder (skills/sequence-diagram in mohitagw15856/pm-claude-skills) into .claude/skills/sequence-diagram in your project. Claude Code loads it when a task matches its description.

How do I install Sequence Diagram in Codex?

Run `npx skills add mohitagw15856/pm-claude-skills --skill sequence-diagram -a codex`. Or copy the skill folder (skills/sequence-diagram in mohitagw15856/pm-claude-skills) into .agents/skills/sequence-diagram in your project. Codex loads it when a task matches its description.

Can I use Sequence Diagram 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 mohitagw15856/pm-claude-skills --skill sequence-diagram -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sequence-diagram, .gemini/skills/sequence-diagram, .github/skills/sequence-diagram and .opencode/skills/sequence-diagram in your project.

What does Sequence Diagram need to run?

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

Does Sequence Diagram 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 Sequence Diagram 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 Sequence Diagram use?

Sequence Diagram 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 Sequence Diagram use?

About 762 tokens (SKILL.md is roughly 3k 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 Sequence Diagram?

Skills that share tags, products or a category with Sequence Diagram: Archify Diagrams (tt-a1i/archify, 81k stars), Diagram Design (cathrynlavery/diagram-design, 47k stars), Draw.io Diagram Studio (Agents365-ai/drawio-skill, 10k stars) and Pretty Mermaid Renderer (imxv/Pretty-mermaid-skills, 1.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sequence Diagram?

mohitagw15856 (a GitHub user) maintains it in mohitagw15856/pm-claude-skills, which has 1,433 GitHub stars. The repository holds 1,348 skills in this directory. The repository was last updated on October 8, 2026.

Source: mohitagw15856/pm-claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.