Skills fp-ts-errors
📦

fp-ts-errors

Content revision r2 Safe ⚙️ External commands🌐 Network access

Build Type-Safe Errors with fp-ts

Unchecked exceptions make TypeScript failures difficult to track. This skill teaches practical Either and TaskEither patterns for explicit, composable error handling.

Supports: Claude Codex Code(CC)
📊 76 Adequate

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request
Review the Skillstore skill "fp-ts-errors" from https://skillstore.io/skills/sickn33-fp-ts-errors.md and its manifest at https://skillstore.io/api/skills/sickn33-fp-ts-errors/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.

Markdown detail GET /skills/sickn33-fp-ts-errors.md Signed manifest GET /api/skills/sickn33-fp-ts-errors/manifest Signed lockfile GET /api/skills/sickn33-fp-ts-errors/lockfile

Test it

Using "fp-ts-errors". Refactor a JSON parser that currently throws exceptions.

Expected outcome:

The response describes an Either-based parser, defines the error channel, and explains how callers handle both outcomes.

Using "fp-ts-errors". Design validation for email, password, and age fields.

Expected outcome:

  • A validation plan that preserves field-specific errors.
  • An explanation of applicative validation for collecting every failure.
  • Guidance for presenting errors at the form boundary.

Using "fp-ts-errors". Wrap user loading and related requests with TaskEither.

Expected outcome:

The response outlines a lazy asynchronous pipeline, typed transport errors, parallel work, retries, and final result handling.

Security Audit

Safe
v5 • 7/23/2026 Open versioned report

The audit reviewed all 100 static findings in SKILL.md. Every match is a false positive caused by Markdown formatting, TypeScript examples, repository metadata, or ordinary application logic; no executable shell behavior, host reconnaissance, prompt injection, or skill-initiated network access was found.

1
Files scanned
863
Lines analyzed
0
Review items
0
False positives ignored

Risk Factors

⚙️ External commands (50)
SKILL.md:30-44 SKILL.md:44-48 SKILL.md:48-77 SKILL.md:77-81 SKILL.md:81-96 SKILL.md:96-102 SKILL.md:102 SKILL.md:104-105 SKILL.md:105-107 SKILL.md:107-125 SKILL.md:125-126 SKILL.md:126-129 SKILL.md:129-133 SKILL.md:133-149 SKILL.md:149-153 SKILL.md:153-166 SKILL.md:166-178 SKILL.md:178-188 SKILL.md:188-227 SKILL.md:227-231 SKILL.md:231-276 SKILL.md:276-280 SKILL.md:280-293 SKILL.md:293-303 SKILL.md:303-328 SKILL.md:328-332 SKILL.md:332-374 SKILL.md:374-378 SKILL.md:378-400 SKILL.md:400-406 SKILL.md:406 SKILL.md:408 SKILL.md:411-418 SKILL.md:418-431 SKILL.md:431-435 SKILL.md:435-461 SKILL.md:461-465 SKILL.md:465-494 SKILL.md:494-498 SKILL.md:498-522 SKILL.md:522-526 SKILL.md:526-534 SKILL.md:534-544 SKILL.md:544-558 SKILL.md:558-562 SKILL.md:562-573 SKILL.md:573-577 SKILL.md:577-584 SKILL.md:584-593 SKILL.md:593-599
🌐 Network access (5)
SKILL.md:418 SKILL.md:583 SKILL.md:686 SKILL.md:587 SKILL.md:5
No confirmed security findings were detected by the latest completed static and semantic audit. This does not prove the skill has no side effects.
Audited by: codex View Audit History →
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Open versioned report
Security Assessment

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Academic citations (APA · BibTeX · CFF)

APA citation

sickn33. (2026). fp-ts-errors security audit report (audit version 5) [Author version unspecified]. Skillstore. https://skillstore.io/skills/sickn33-fp-ts-errors/audits/5

BibTeX citation

@techreport{sickn33-sickn33-fp-ts-errors-2026, author = {sickn33}, title = {fp-ts-errors security audit report (audit version 5)}, institution = {Skillstore}, year = {2026}, number = {5}, url = {https://skillstore.io/skills/sickn33-fp-ts-errors/audits/5}, note = {Author version unspecified} }

CITATION.cff

cff-version: 1.2.0 message: "If you use this Skill, cite its author and this versioned security audit report." title: "fp-ts-errors security audit report (audit version 5)" version: "unspecified" type: report authors: - name: "sickn33" date-released: "2026-07-23" url: "https://skillstore.io/skills/sickn33-fp-ts-errors/audits/5" identifiers: - type: other value: "skillstore:sickn33-fp-ts-errors:audit:5" description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: High
55
Architecture
85
Maintainability
85
Content
68
Community
74
Spec Compliance

What You Can Build

Refactor Exception-Based Code

Replace hidden exceptions with typed Either results and explicit handling paths.

Design Reliable Service Pipelines

Compose database and API operations with TaskEither, typed failures, retries, and fallbacks.

Collect Form Validation Errors

Build validators that report every field failure instead of stopping after the first error.

Try These Prompts

Understand Either 
Explain Either, Left, and Right using a simple TypeScript parsing example.
Refactor Throwing Code 
Refactor my throwing TypeScript function into Either and explain each error type.
Accumulate Validation Failures 
Design fp-ts validation for these fields and return all failures with field-specific messages.
Compose Async Failure Paths 
Design a TaskEither workflow for these API and database steps, including typed errors, retries, fallbacks, and final handling.

Best Practices

  • Define precise error types before composing business operations.
  • Convert exceptions, nullable values, and promises at system boundaries.
  • Handle both error and success branches once at the edge of the workflow.

Avoid

  • Do not hide failures with broad defaults when callers need error details.
  • Do not mix unchecked exceptions into an otherwise typed Either pipeline.
  • Do not retry every failure without limits or error classification.

Frequently Asked Questions

What does this skill teach?
It teaches practical fp-ts patterns for representing, composing, and handling typed failures in TypeScript.
Does this skill install fp-ts?
No. It provides implementation guidance and examples for projects that choose fp-ts.
When should I use Either?
Use Either for synchronous operations that can return a typed failure or a successful value.
When should I use TaskEither?
Use TaskEither for lazy asynchronous operations that can fail, including API and database calls.
Can it collect multiple validation errors?
Yes. It explains applicative validation with NonEmptyArray for accumulating multiple failures.
Will the examples work without adaptation?
Not always. Placeholder types, imports, libraries, and project conventions must match the target codebase.

Developer Details

Author

sickn33

License

MIT

Skillstore revision

r2

Version notice

The author did not declare a version.

Repository

https://github.com/sickn33/antigravity-awesome-skills/tree/main/skills/fp-ts-errors

Ref

88a8e9a07f4c54ab105c1c41b6267c287146b07b

Maintenance freshness

7/26/2026

Usage

6 downloads · 96 views

File structure

📄 SKILL.md

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