mermaid
Use when writing or editing any Mermaid diagram the user will see — the flow diagram in plan.md, anything pushed to flowDescription, a diagram in a spec.
Skill by Katch-AI
Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/katch-ai-mermaid
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: writing
Reviews
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Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
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- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/mermaid
What's inside
- Skill name
mermaid- Description
- Use when writing or editing any Mermaid diagram the user will see — the flow diagram in plan.md, anything pushed to flowDescription, a diagram in a spec.
- License
- MIT
- Instructions
- 33 lines in SKILL.md · view on GitHub
Files (1)
- SKILL.md
SKILL.md (first lines)
# Mermaid
The dashboard renders Mermaid **11.16.0**. A diagram that fails to parse shows as a plain code block, with no error. Styling belongs to the product: `style`, `classDef`, `linkStyle`, `%%{init}` directives, `click` handlers, icons, and images are ignored or stripped, so write structure and labels only.
## Rules
1. **Quote every node and edge label**, always: `a["forward invoice to [billing@x.com]"]`, `b -- "refund" --> c`. Unquoted labels break on the first `[ ] ( ) { } |`. For a literal `"` inside a label use `#quot;`; there is no backslash escape.
2. **No linter ships with the plugin.** Follow these rules strictly and keep diagrams simple. After pushing, check the rendered Flow description on the agent page; a parse failure shows as a code block.
3. Use `flowchart TD`. Shapes carry meaning: `id["step"]`, `id("decision box")`, `id{"branch?"}`, `id(["start or end"])`. Edges: `-->`, `-- "label" -->`, `-. "throws" .->` for failure paths.
4. Short semantic ids; only the label shows.
5. A node labelled exactly `end` (lowercase) breaks the chart; capitalize or quote it. An id starting with `o` or `x` right after a link reads as an edge type (`A---oB`); add a space or capitalize.
## Example
```mermaid
flowchart TD
trigger(["Gmail: new email in label intake"])
start["Start run"]
classify("decision: classify_intent")
branch{"intent?"}
decide("decision: decide_refund_eligibility")
artifact["Write run summary"]
finish(["Finish run"])
fail(["Fail run"])
trigger --> start --> classify --> branch
branch -- "refund request" --> decide --> artifact --> finish
branch -- "other" --> finish
classify -. "throws" .-> fail
decide -. "throws" .-> fail
```From Katch-AI/hegl-plugin, MIT.
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fix-errors
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Use when the user runs `/hegl:fix-errors` or asks why an agent's runs are failing, or about an incident.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Oct 3, 2026 (26 days ago)
- Last release
- Oct 23, 2026 (6 days ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/Katch-AI/hegl-plugin
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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- 0.570score
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Use when writing an artifact body (the AsciiDoc documents recorded with the Hegl piece's `record_artifact` action and validated with `validate_artifact`), or…
SkillAFreshness: AClaude Code +9 - 0.570score
activepieces
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Use when building or editing any Activepieces flow — trigger flows, the candidate flow, piece steps, CODE steps, sandbox steps, routers, loops — when…
SkillAFreshness: AClaude Code +9 - 0.570score
fetching-data-via-pieces
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Use when you need records from an external system the organization has a connection for — pulling past examples for an eval set, checking what a connection…
SkillAFreshness: AClaude Code +9 - 0.570score
implementing-decision-boxes
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Use when the candidate flow is scaffolded and smoke-tested, to turn stub decision boxes into real implementations and improve them.
SkillAFreshness: AClaude Code +9 - 0.570score
platform-api
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Use when deciding which Hegl tool performs an operation (agent documents, decision boxes, flows, trigger flows, connections and config, piece installs…
SkillAFreshness: AClaude Code +9 - 0.565score
composing-email-html
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Use when authoring the htmlBody of any send_email step — during Execute when building flow steps that send email, and during Plan when sketching email content.
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Cite this page
mermaid skill. Agent Mart. https://agentmart.dev/skills/katch-ai-mermaid (last updated 2026-10-24)