flow

flow is a skill for Claude Code from lis186/SourceAtlas. It costs 15 tokens per session (1,920 once invoked), scanned A, original, MIT.

A code-analysis aid that follows a process from its starting point through the business rules it uses. Business rules are the decisions and steps in the code that implement how the product behaves.

In plain words
What is it for?
Use it to trace a feature’s execution path, investigate error or data flows, find unreachable code, examine state changes, or study transaction and concurrency behavior.
Why use it?
It reduces the effort of reconstructing a process by hand and helps reveal special paths such as errors, state changes, transactions, concurrency, or unused code.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter.

Part of the sourceatlas plugin — 14 skills shipped together

Good fit Use it to trace a feature’s execution path, investigate error or data flows, find unreachable code, examine state changes, or study transaction and concurrency behavior.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lis186/sourceatlas/flow
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add lis186/SourceAtlas --skill flow
Clone the repo
git clone --depth 1 https://github.com/lis186/SourceAtlas

Made for: Claude Code.

Or install sourceatlas, the plugin that ships this one along with the rest of its 14 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for flow

README.md
[![agentmods](https://agentmods.dev/badge/skills/lis186/sourceatlas/flow/github.svg)](https://agentmods.dev/skills/lis186/sourceatlas/flow)
Your own site
<a href="https://agentmods.dev/skills/lis186/sourceatlas/flow"><img src="https://agentmods.dev/badge/skills/lis186/sourceatlas/flow/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for flow

Your own site · 80×15
<a href="https://agentmods.dev/skills/lis186/sourceatlas/flow"><img src="https://agentmods.dev/badge/skills/lis186/sourceatlas/flow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,920 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 4
    Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.
    Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00015 $0.01920
Opus 5.5 $0.00006 $0.00768
Sonnet 5.5 $0.00003 $0.00384
Haiku 4.5 $0.00002 $0.00192

Measured 1mo ago against content hash 1f572eb5f531, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

flow scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugin/commands/flow/SKILL.md · 250 lines

How it starts

The opening of the file, as written. The whole thing — 250 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SourceAtlas: Flow Analysis

Target: $ARGUMENTS


STEP 0: Mode Detection (EXECUTE IMMEDIATELY)

IMPORTANT: Check these patterns FIRST before doing anything else.

Check for Tier 2-3 Keywords (External Mode Required)

Scan $ARGUMENTS for these keywords. If ANY match, load external file and STOP reading this document:

If arguments contain... Then execute this action
"dead code" OR "unreachable" OR "unused" Read scripts/atlas/flow-modes/mode-13-dead-code.md then follow its instructions
"async" OR "thread" OR "concurrent" OR "race" Read scripts/atlas/flow-modes/mode-14-concurrency.md then follow its instructions
"taint" OR "injection" OR "untrusted" Read scripts/atlas/flow-modes/mode-12-taint-analysis.md then follow its instructions
"state" OR "status" OR "lifecycle" Read scripts/atlas/flow-modes/mode-04-state-machine.md then follow its instructions
"transaction" OR "rollback" OR "commit" Read scripts/atlas/flow-modes/mode-09-transaction.md then follow its instructions
"log" OR "logging" OR "from logs" Read scripts/atlas/flow-modes/mode-06-log-discovery.md then follow its instructions
"compare" OR "diff" OR "vs" Read scripts/atlas/flow-modes/mode-05-flow-comparison.md then follow its instructions
"feature toggle" OR "feature flag" Read scripts/atlas/flow-modes/mode-07-feature-toggle.md then follow its instructions
"cache" OR "redis" OR "TTL" Read scripts/atlas/flow-modes/mode-11-cache-flow.md then follow its instructions

If a keyword matched above: Load the file NOW, then execute ONLY that mode's instructions. Do NOT continue reading this document.

Check for Tier 1 Keywords (Built-in Modes)

If none of the above matched, check for these Tier 1 patterns:

If arguments contain... Mode to use
"who calls" OR "callers" OR "called by" Mode 1: Reverse Tracing (see below)
"error" OR "failure" OR "exception" OR "fail" Mode 2: Error Path (see below)
"data flow" OR "how is X calculated" OR "trace variable" Mode 3: Data Flow (see below)
"event" OR "message" OR "pub/sub" OR "listener" Mode 8: Event Tracing (see below)
"permission" OR "role" OR "auth" OR "access control" Mode 10: Permission Flow (see below)
(none of the above) Standard Flow Tracing (default)

Read the full file on GitHub · 250 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 250 lines · 0 tokens per session scan A 1f572eb5f531

Subscribe to this mod's changes

flow is a skill published in the GitHub repository lis186/SourceAtlas (48 stars, last pushed 2mo ago), licensed MIT. It adds 15 tokens to every session and 1,920 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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