flow-validate

name	flow-validate
description	This skill should be used when the user asks to 'validate a flow', 'check my flow', 'lint this flow', 'is this flow correct', 'flow errors', 'flow warnings', or wants to analyze a prompt-language flow for issues before executing it.
disable-model-invocation	true
allowed-tools	Bash, Read, Glob
model	inherit
argument-hint	[flow text or file path]

Flow Validate

Parse, lint, and score a prompt-language flow to find issues before execution.

What to do

1. Determine the flow source:

   • If the user provided a file path argument, read that file
   • If the user pasted flow text inline, use that
   • Otherwise, look for example.flow or any .flow file in the current directory

2. Run the validation script:

   node <plugin-dir>/skills/flow-validate/validate.mjs [file-or-stdin]
   

   Or pipe flow text to it:

   echo '<flow text>' | node <plugin-dir>/skills/flow-validate/validate.mjs
   

   Where <plugin-dir> is the directory containing this skill (find it via Glob for skills/flow-validate/validate.mjs).

3. Report the results to the user:

   • Parse warnings: syntax issues found during parsing
   • Lint warnings: anti-patterns detected (empty bodies, break outside loop, unresolved variables, etc.)
   • Complexity score: 1-5 rating with explanation
   • Summary: overall pass/fail assessment

4. If there are warnings, suggest specific fixes for each one.

Complexity Scale

• 1 (Trivial): Linear flow, 3 or fewer nodes, no control flow
• 2 (Simple): Up to 5 nodes or 1 control flow construct, shallow nesting
• 3 (Moderate): Up to 10 nodes, nesting depth up to 2, or 2-3 control flows
• 4 (Complex): More than 10 nodes, depth 3+, or 4+ control flows
• 5 (Very complex): Deep nesting combined with many control flows and gates

Common Warnings

• Empty body: A loop, if, try, or spawn block has no nodes inside it
• Break/continue outside loop: break or continue used outside a while/until/retry/foreach
• Retry without run: retry block has no run node -- retry re-loops on command_failed
• Unresolved variable: ${varName} referenced but never defined by a let/var node
• Infinite loop risk: Loop condition depends on a predicate (like command_failed) but body has no run node
• Missing goal: No Goal: line found
• Empty flow: No nodes defined in the flow: block

Review Prioritization

When many warnings exist, report in this priority order:

1. Parse blockers (flow cannot be executed safely)
2. Control-flow safety issues (infinite loop risk, invalid break/continue)
3. Semantic issues (unresolved interpolation, retry-without-run)
4. Complexity/readability concerns

Suggested Fix Strategy

• First make the flow executable (parse/lint blockers).
• Then reduce control-flow risk.
• Then simplify complexity (collapse unnecessary phases, remove short-distance variables).

Output Format

• Parse: pass/fail + count
• Lint: pass/fail + count
• Complexity: score + short rationale
• Top 3 fixes: concrete edits with expected impact

Edge Cases

• If multiple .flow files exist and no argument is given, ask which file to validate.
• If no flow source is discoverable, report exactly what was searched.
• If validation script path is missing, report plugin installation mismatch instead of guessing.