Diagnose and fix Hex common errors and exceptions. An agent skill from jeremylongshore/tons-of-skills-marketplace.

MITAuto-check passedDevelopment

Install Hex Common Errors

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill hex-common-errors -a claude-code

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

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace hex-common-errors --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/hex-common-errors .claude/skills/hex-common-errors && 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/

Facts

Skill name
hex-common-errors
GitHub stars
2.8k
Token cost
~837 tokens
SKILL.md length
333 words
Files
1
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Diagnose and fix Hex common errors and exceptions. An agent skill from jeremylongshore/tons-of-skills-marketplace.

  • Works in 4 steps: Classify authentication, authorization,… → Reproduce once with the safe probe and… → Check scope, parameter schema, project… → …
  • Encountering Hex errors
  • SKILL.md covers Error Reference, Quick Diagnostics, Overview and Prerequisites, plus 6 more sections
  • Calls curl and python3; needs HEX_API_TOKEN

What it does

Hex Common Errors is an agent skill from jeremylongshore/tons-of-skills-marketplace. Diagnose and fix Hex common errors and exceptions. Use when encountering Hex errors, debugging failed requests, or troubleshooting integration issues. Trigger with phrases like "hex error", "fix hex", "hex not working", "debug hex".

Its SKILL.md is about 840 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Designed for Claude Code

It sits in Development, covering Debugging. It works with SQL. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • Encountering Hex errors
  • Debugging failed requests
  • Troubleshooting integration issues
  • With phrases like hex error

Example prompts

  • “hex error”
  • “fix hex”
  • “hex not working”
  • “/hex-common-errors”

Requirements

  • Python 3
  • A credential in HEX_API_TOKEN
  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Grep, Bash(curl:*)

Workflow steps

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

  1. Classify authentication, authorization, project lookup, validation, quota, timeout, and terminal-run errors before changing configuration.
  2. Reproduce once with the safe probe and capture only status, latency, quota, and opaque run ID.
  3. Check scope, parameter schema, project state, quota, and downstream connection health in that order.
  4. Make one reversible change at a time and escalate a redacted bundle when the error persists.

What it can do on your machine

Read from SKILL.md and the folder at commit 80f86df. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Grep
    • Bash(curl:*)

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • curl
    • python3

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • learn.hex.tech

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • HEX_API_TOKEN

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Hex Common Errors loads about 837 tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 333 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~63
When it runs · the whole SKILL.md, loaded when a task matches
~837

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 jeremylongshore/tons-of-skills-marketplace at commit 80f86df, republished under its MIT licence (© jeremylongshore). 333 words, ~837 tokens.

Download SKILL.mdSave it as .claude/skills/hex-common-errors/SKILL.md (or your agent's skills folder).
name
hex-common-errors
description
Diagnose and fix Hex common errors and exceptions. Use when encountering Hex errors, debugging failed requests, or troubleshooting integration issues. Trigger with phrases like "hex error", "fix hex", "hex not working", "debug hex".
allowed-tools
Read, Grep, Bash(curl:*)
compatibility
Designed for Claude Code
version
1.6.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
saas, hex, data, analytics

Hex Common Errors

Error Reference

401 Unauthorized

Cause: Token invalid, expired, or missing. Fix: Regenerate token in Hex workspace settings.

403 Forbidden — Read-Only Token

Cause: Token has "Read projects" scope but RunProject requires "Run projects". Fix: Create new token with "Run projects" scope.

404 Not Found — Project

Cause: Project ID wrong or project not published. Fix: Verify project ID. Only published projects can be run via API.

429 Too Many Requests

Cause: RunProject is limited to 20 requests/min, 60/hr. Fix: Queue runs with delays. See hex-rate-limits.

Run Status: ERRORED

Cause: SQL query, Python code, or connection error in the project. Fix: Open the project in Hex UI and check the error in the run history.

Run Status: KILLED

Cause: Run exceeded timeout or was manually cancelled. Fix: Optimize slow queries. Increase timeout in API trigger.

Quick Diagnostics

bash
# Test token
curl -s -o /dev/null -w "%{http_code}" \
  -H "Authorization: Bearer $HEX_API_TOKEN" \
  https://app.hex.tech/api/v1/projects

# List recent runs for a project
curl -s -H "Authorization: Bearer $HEX_API_TOKEN" \
  https://app.hex.tech/api/v1/project/PROJECT_ID/runs | python3 -m json.tool

Overview

This reference triages project-run failures using status, aggregate telemetry, and opaque run IDs. It does not authorize copying SQL, cell output, data previews, or tokens into a ticket.

Prerequisites

  • A safe sandbox probe, redacted correlation ID, endpoint class, and HTTP or terminal-run status.
  • A scoped read-only diagnostic credential and named owner for any project, schedule, or access change.

Instructions

  1. Classify authentication, authorization, project lookup, validation, quota, timeout, and terminal-run errors before changing configuration.
  2. Reproduce once with the safe probe and capture only status, latency, quota, and opaque run ID.
  3. Check scope, parameter schema, project state, quota, and downstream connection health in that order.
  4. Make one reversible change at a time and escalate a redacted bundle when the error persists.

Output

Return error class, correlation ID, project scope, probe outcome, remediation attempted, and next owner. Do not include SQL, output, credentials, or identities.

Error Handling

Treat unknown destination, failed redaction, access expansion, or repeated non-idempotent run as a stop condition. Cancel or restore the prior revision rather than retrying with broader scope.

Examples

status=429; project=proj-sandbox-12; correlation=run-opaque-11; action=bounded-backoff; safe_probe=recovered supports a safe handoff.

Resources

Next Steps

For debugging, see hex-debug-bundle.

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/.curated/hex-common-errors of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit 80f86df

Compare with similar skills

Hex Common Errors 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.

Hex Common Errors compared with similar skills
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Hex Common Errors this skilljeremylongshore/tons-of-skills-marketplace2.8k—~837Automated safety check: PassMIT
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Version Managementrelytcloud/pg_ducklake143—~455Automated safety check: PassMIT
Trace And Isolaterohitg00/skillkit1.5k—~1.8kAutomated safety check: PassApache-2.0
Debugging ExperimentsPostHog/posthog40k—~5.4kAutomated safety check: PassCustom licence
Relational Query ProcessorFoundationDB/fdb-record-layer675—~1kAutomated safety check: PassApache-2.0

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Works with

Categories

Questions about Hex Common Errors

What does Hex Common Errors do?

Diagnose and fix Hex common errors and exceptions. An agent skill from jeremylongshore/tons-of-skills-marketplace. Hex Common Errors is an agent skill from jeremylongshore/tons-of-skills-marketplace. Diagnose and fix Hex common errors and exceptions.

When should I use Hex Common Errors?

Hex Common Errors fits situations like: encountering Hex errors; debugging failed requests; troubleshooting integration issues; with phrases like hex error.

How do I install Hex Common Errors in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill hex-common-errors -a claude-code`. Or copy the skill folder (skills/.curated/hex-common-errors in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/hex-common-errors in your project. Claude Code loads it when a task matches its description.

How do I install Hex Common Errors in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill hex-common-errors -a codex`. Or copy the skill folder (skills/.curated/hex-common-errors in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/hex-common-errors in your project. Codex loads it when a task matches its description.

Can I use Hex Common Errors 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 jeremylongshore/tons-of-skills-marketplace --skill hex-common-errors -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hex-common-errors, .gemini/skills/hex-common-errors, .github/skills/hex-common-errors and .opencode/skills/hex-common-errors in your project.

What does Hex Common Errors need to run?

Going by SKILL.md and its folder, Hex Common Errors needs the command-line tools its instructions call (curl and python3) and credentials named HEX_API_TOKEN. Our summary lists: Python 3; A credential in HEX_API_TOKEN. Its frontmatter pre-approves these tools: Read, Grep, Bash(curl:*). Compatibility (from SKILL.md): Designed for Claude Code.

Does Hex Common Errors access the network?

SKILL.md names 1 domain. As links in the text: learn.hex.tech. This is read from the text; nothing was executed.

Is Hex Common Errors 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 Hex Common Errors use?

Hex Common Errors is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Hex Common Errors use?

About 837 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 Hex Common Errors?

Skills that share tags, products or a category with Hex Common Errors: Smt E2E Dataflow Debugging (GoogleCloudPlatform/DataflowTemplates, 1.3k stars), Version Management (relytcloud/pg_ducklake, 143 stars), Trace And Isolate (rohitg00/skillkit, 1.5k stars) and Debugging Experiments (PostHog/posthog, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Hex Common Errors?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,825 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 9, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.