Agent skill

Call Chain

Traces execution paths through the code graph with criticality scoring and Mermaid charts.

MITAuto-check passedDevelopment

Install Call Chain

skills CLI

$ npx skills add athola/claude-night-market --skill call-chain -a claude-code

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

GitHub CLI

$ gh skill install athola/claude-night-market call-chain --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/athola/claude-night-market.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/cartograph/skills/call-chain .claude/skills/call-chain && 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/

Paste into Claude Code

Install the "call-chain" agent skill from https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain into .claude/skills/call-chain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "call-chain", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add athola/claude-night-market --skill call-chain -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install athola/claude-night-market call-chain --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/athola/claude-night-market.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/cartograph/skills/call-chain .agents/skills/call-chain && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "call-chain" agent skill from https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain into .agents/skills/call-chain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "call-chain", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add athola/claude-night-market --skill call-chain -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install athola/claude-night-market call-chain --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/athola/claude-night-market.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/cartograph/skills/call-chain .cursor/skills/call-chain && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "call-chain" agent skill from https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain into .cursor/skills/call-chain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "call-chain", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/athola/claude-night-market.git --path plugins/cartograph/skills/call-chain

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add athola/claude-night-market --skill call-chain -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install athola/claude-night-market call-chain --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/athola/claude-night-market.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/cartograph/skills/call-chain .gemini/skills/call-chain && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "call-chain" agent skill from https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain into .gemini/skills/call-chain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "call-chain", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install athola/claude-night-market call-chain

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add athola/claude-night-market --skill call-chain -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/athola/claude-night-market.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/cartograph/skills/call-chain .github/skills/call-chain && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "call-chain" agent skill from https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain into .github/skills/call-chain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "call-chain", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add athola/claude-night-market --skill call-chain -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install athola/claude-night-market call-chain --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/athola/claude-night-market.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/cartograph/skills/call-chain .opencode/skills/call-chain && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "call-chain" agent skill from https://github.com/athola/claude-night-market/tree/master/plugins/cartograph/skills/call-chain into .opencode/skills/call-chain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "call-chain", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: call-chain
GitHub stars: 341
Token cost: ~820 tokens
SKILL.md length: 285 words
Files: 1
Skills in repo: 154
Repo updated: Oct 6, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Traces execution paths through the code graph with criticality scoring and Mermaid charts.

Works in 5 steps: Accept target: Get a function name or… → Run flow tracing (requires gauntlet) → Display as indented tree → …
Understanding how a function propagates through the system
SKILL.md covers When NOT To Use, Prerequisites, Steps and Criticality Scoring, plus 1 more section
Calls python3 and rg

What it does

Call Chain is an agent skill from athola/claude-night-market. Traces execution paths through the code graph with criticality scoring and Mermaid charts. Use when understanding how a function propagates through the system.

Its SKILL.md is about 820 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: 23 Claude Code plugins: TDD enforcement hooks, git/PR workflows, spec-driven development, code review, project lifecycle, fix-from-error, maintenance automation, context… The licence is MIT.

When your agent uses it

Understanding how a function propagates through the system
Tasks that involve Diagrams

Example prompts

“Use the call-chain skill to trace execution paths through the code graph with criticality scoring and Mermaid charts”
“/call-chain”

Requirements

Python 3

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

Accept target: Get a function name or entry point
Run flow tracing (requires gauntlet)
Display as indented tree
Generate Mermaid flowchart
Show criticality breakdown

What it can do on your machine

Read from SKILL.md and the folder at commit 9f3eb00. 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
Shell commands in SKILL.md call:
- python3
- rg
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

Call Chain loads about 820 tokens when it runs. Until then it costs about 43 tokens; SKILL.md has 285 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~43
When it runs · the whole SKILL.md, loaded when a task matches: ~820

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 athola/claude-night-market at commit 9f3eb00, republished under its MIT licence (© athola). 285 words, ~820 tokens.

Download SKILL.mdSave it as .claude/skills/call-chain/SKILL.md (or your agent's skills folder).

name: call-chain
description: Traces execution paths through the code graph with criticality scoring and Mermaid charts. Use when understanding how a function propagates through the system.
role: entrypoint

Call Chain Tracing

Trace execution flows through the codebase using the code knowledge graph.

When NOT To Use

Static import relationships (use cartograph:dependency-graph)
Scoring the risk of a change (use pensive:blast-radius)

Prerequisites

This skill requires the gauntlet plugin for graph data. Discover it:

bash

GRAPH_QUERY=$(find ~/.claude/plugins -name "graph_query.py" -path "*/gauntlet/*" 2>/dev/null | head -1)

If gauntlet is not installed: Fall back to static analysis. Use grep to trace function calls and build a Mermaid diagram manually from import/call patterns. Skip graph-specific steps.

If installed but no graph.db: Tell the user to run /gauntlet-graph build.

Steps

Accept target: Get a function name or entry point from the user (or trace all entry points).

Run flow tracing (requires gauntlet):

bash

python3 "$GRAPH_QUERY" --action flows --depth 15

To filter by entry point:

bash

python3 "$GRAPH_QUERY" --action flows --entry "main"

Fallback (no gauntlet): Trace calls with rg (or grep):

bash

# Prefer rg (ripgrep) for speed; fall back to grep
if command -v rg &>/dev/null; then
  rg -n "function_name\(" --type py . | head -20
else
  grep -rn "function_name(" --include="*.py" . | head -20
fi

Build the call tree manually from search results.

Display as indented tree:

main() [criticality: 0.72]
  -> validate_input()
    -> parse_config()
  -> process_data()
    -> db.execute_query()
    -> cache.store()
  -> send_response()

Generate Mermaid flowchart:

mermaid

flowchart LR
  main --> validate_input
  main --> process_data
  main --> send_response
  validate_input --> parse_config
  process_data --> db.execute_query
  process_data --> cache.store

Show criticality breakdown:
- File spread: how many files the flow touches
- Security sensitivity: auth/crypto code in the path
- Test coverage gaps: untested nodes in the flow

Show full SKILL.md (119 more words)Show less

Criticality Scoring

Factor	Weight	Meaning
File spread	0.30	Touches many files
Security	0.25	Contains auth/crypto code
External calls	0.20	Unresolved dependencies
Test gap	0.15	Untested nodes in flow
Depth	0.10	Deep call chains

Exit Criteria

Indented call tree displayed for the target function with criticality scores in the form [criticality: N.NN]
Mermaid flowchart LR generated with edges representing each caller-to-callee relationship in the traced path
Criticality breakdown table shown covering: file spread, security sensitivity, external calls, test gap, and depth
If gauntlet is not installed, fallback to static rg/grep analysis is used and the absence of graph data is noted
If gauntlet is installed but graph.db is absent, user is told to run /gauntlet-graph build before the skill halts

Files

Just SKILL.md in plugins/cartograph/skills/call-chain of athola/claude-night-market.

Open the folder on GitHubat commit 9f3eb00

Compare with similar skills

Call Chain 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.

Call Chain compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Call Chain this skillathola/claude-night-market	341	—	~820	Automated safety check: Pass	MIT	3 days ago
Archify Diagramstt-a1i/archify	81k	—	~2.9k	Automated safety check: Pass	MIT	today
Diagram Designcathrynlavery/diagram-design	47k	1 repos	~7.5k	Automated safety check: Pass	MIT	2 days ago
Draw.io Diagram StudioAgents365-ai/drawio-skill	10k	—	~2.4k	Automated safety check: Notes	MIT	7 days ago
Pretty Mermaid Rendererimxv/Pretty-mermaid-skills	1.5k	—	~2k	Automated safety check: Pass	MIT	1 mo ago
Archify Diagram BuilderUnclecheng-li/AI_Animation	1.5k	2 repos	~4.1k	Automated safety check: Pass	MIT	4 days ago

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Questions about Call Chain

What does Call Chain do?

Traces execution paths through the code graph with criticality scoring and Mermaid charts. Call Chain is an agent skill from athola/claude-night-market. Traces execution paths through the code graph with criticality scoring and Mermaid charts.

When should I use Call Chain?

Call Chain fits situations like: understanding how a function propagates through the system; tasks that involve Diagrams.

How do I install Call Chain in Claude Code?

Run `npx skills add athola/claude-night-market --skill call-chain -a claude-code`. Or copy the skill folder (plugins/cartograph/skills/call-chain in athola/claude-night-market) into .claude/skills/call-chain in your project. Claude Code loads it when a task matches its description.

How do I install Call Chain in Codex?

Run `npx skills add athola/claude-night-market --skill call-chain -a codex`. Or copy the skill folder (plugins/cartograph/skills/call-chain in athola/claude-night-market) into .agents/skills/call-chain in your project. Codex loads it when a task matches its description.

Can I use Call Chain 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 athola/claude-night-market --skill call-chain -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/call-chain, .gemini/skills/call-chain, .github/skills/call-chain and .opencode/skills/call-chain in your project.

What does Call Chain need to run?

Going by SKILL.md and its folder, Call Chain needs the command-line tools its instructions call (python3 and rg). Our summary lists: Python 3.

Does Call Chain 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 Call Chain 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 Call Chain use?

Call Chain 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 Call Chain use?

About 820 tokens (SKILL.md is roughly 3.3k 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 Call Chain?

Skills that share tags, products or a category with Call Chain: 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 Call Chain?

athola (a GitHub user) maintains it in athola/claude-night-market, which has 341 GitHub stars. The repository holds 154 skills in this directory. The repository was last updated on October 6, 2026.

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

Call Chain

Install Call Chain

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Call Chain Tracing

When NOT To Use

Prerequisites

Steps

Criticality Scoring

Exit Criteria

Files

Compare with similar skills

Similar skills

Archify Diagrams

Diagram Design

Draw.io Diagram Studio

Pretty Mermaid Renderer

Archify Diagram Builder

Mermaid

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Skill Library Mission

Questions about Call Chain

Install Call Chain

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Call Chain Tracing

When NOT To Use

Prerequisites

Steps

Criticality Scoring

Exit Criteria

Files

Compare with similar skills

Similar skills

More from athola/claude-night-market

Related

Questions about Call Chain