Fortify Development
coollabsio/coolify
ACTIVATE when the user works on authentication in Laravel. An agent skill from coollabsio/coolify.
Diagnose Instantly API v2 authentication, scope, validation, quota, and resource errors without unsafe retries.
Install Instantly Common Errors
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-common-errors --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ 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/instantly-common-errors .claude/skills/instantly-common-errors && rm -rf skills-srcUse ~/.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/
Install the "instantly-common-errors" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errors into .claude/skills/instantly-common-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "instantly-common-errors", 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 install https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errorsType 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.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-common-errors --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/.curated/instantly-common-errors .agents/skills/instantly-common-errors && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "instantly-common-errors" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errors into .agents/skills/instantly-common-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "instantly-common-errors", 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.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-common-errors --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/.curated/instantly-common-errors .cursor/skills/instantly-common-errors && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "instantly-common-errors" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errors into .cursor/skills/instantly-common-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "instantly-common-errors", 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 https://github.com/jeremylongshore/tons-of-skills-marketplace.git --path skills/.curated/instantly-common-errors--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-common-errors --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/.curated/instantly-common-errors .gemini/skills/instantly-common-errors && rm -rf skills-srcUse ~/.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/
Install the "instantly-common-errors" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errors into .gemini/skills/instantly-common-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "instantly-common-errors", 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.
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-common-errorsInstalls 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).
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/.curated/instantly-common-errors .github/skills/instantly-common-errors && rm -rf skills-srcUse ~/.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/
Install the "instantly-common-errors" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errors into .github/skills/instantly-common-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "instantly-common-errors", 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.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-common-errors --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/.curated/instantly-common-errors .opencode/skills/instantly-common-errors && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "instantly-common-errors" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/instantly-common-errors into .opencode/skills/instantly-common-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "instantly-common-errors", 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
instantly-common-errors- GitHub stars
- 2.8k
- Token cost
- ~1.1k tokens
- SKILL.md length
- 461 words
- Files
- 2 (incl. references)
- Skills in repo
- 3,342
- Repo updated
- First seen
- Licence
- MIT
At a glance
Diagnose Instantly API v2 authentication, scope, validation, quota, and resource errors without unsafe retries.
- Works in 6 steps: Capture the method, route template,… → Separate authentication, authorization,… → Check the live endpoint reference and… → …
- A request fails
- SKILL.md covers Overview, Prerequisites, Tool Discipline and Current Contract, plus 7 more sections
- Reaches api.instantly.ai
What it does
Instantly Common Errors is an agent skill from jeremylongshore/tons-of-skills-marketplace. Diagnose Instantly API v2 authentication, scope, validation, quota, and resource errors without unsafe retries. Use when a request fails or returns an unfamiliar status or payload. Trigger with "debug Instantly 401", "fix Instantly 429", or "diagnose Instantly API error".
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/official-docs.md`). Compatibility notes: Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key
It sits in Backend & APIs, covering Authentication. 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
- A request fails
- Returns an unfamiliar status
- With debug Instantly 401
- Fix Instantly 429
Example prompts
- “debug Instantly 401”
- “fix Instantly 429”
- “diagnose Instantly API error”
- “/instantly-common-errors”
Requirements
- Compatibility (from SKILL.md): Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key
- Pre-approved tools (allowed-tools): Read, Glob, Grep, WebFetch, Write, Edit
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Capture the method, route template, status, request ID, and redacted response shape.
- Separate authentication, authorization, payment, validation, absence, conflict, and throttling failures.
- Check the live endpoint reference and exact required scope.
- Reproduce with a synthetic read-only request where possible.
- Apply the smallest configuration or code correction.
- Record evidence and stop before any destructive retry.
What it can do on your machine
Read from SKILL.md and the folder at commit cfae287. 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:
ReadGlobGrepWebFetchWriteEdit
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
api.instantly.ai
Also links to:
developer.instantly.ai
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.
Compatibility
Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key
From compatibility in the SKILL.md frontmatter.
Context cost
Instantly Common Errors loads about 1.1k tokens when it runs, and up to ~1.8k if it reads all its reference files. Until then it costs about 74 tokens; SKILL.md has 461 words of instructions outside code blocks.
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 cfae287, republished under its MIT licence (© jeremylongshore). 461 words, ~1,120 tokens.
Download SKILL.mdSave it as
.claude/skills/instantly-common-errors/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- instantly-common-errors
- description
- Diagnose Instantly API v2 authentication, scope, validation, quota, and resource errors without unsafe retries. Use when a request fails or returns an unfamiliar status or payload. Trigger with "debug Instantly 401", "fix Instantly 429", or "diagnose Instantly API error".
- allowed-tools
- Read, Glob, Grep, WebFetch, Write, Edit
- compatibility
- Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key
- argument-hint
- [status-code] [operation]
- version
- 1.13.0
- author
- Jeremy Longshore <jeremy@intentsolutions.io>
- license
- MIT
- tags
- saas, instantly, common-errors
- model
- inherit
- effort
- high
Instantly API Error Triage
Overview
Turn an observed failure into a bounded diagnosis and a verified corrective action. Record assumptions, evidence, approval state, and rollback ownership so another operator can reproduce the result.
Prerequisites
- The target repository, Instantly workspace, environment, and accountable owner
- Current security, privacy, compliance, capacity, and change-control requirements
- An approved API v2 key only when a bounded live verification is necessary
Tool Discipline
Use Read, Glob, and Grep to inspect code, configuration, and evidence. Use WebFetch only for current first-party Instantly documentation and package metadata. Use Write or Edit only when implementation was requested and exact target files are known; never write credentials, lead data, email content, or unrestricted environment output.
Current Contract
- 401 means missing, invalid, or revoked authorization; 403 means the key lacks a required scope.
- 429 is workspace-wide unless the endpoint publishes a stricter override.
- API errors expose statusCode, error, and message; do not infer success from a JSON body alone.
Authentication
Use an API v2 key as Authorization: Bearer <key> against https://api.instantly.ai/api/v2. Grant only the endpoint-specific scopes needed, inject the key from an approved server-side secret manager, and never print, persist, commit, or place it in a URL. Treat key creation, rotation, revocation, member changes, workspace delegation, and production access as owner-approved actions.
Instructions
- Capture the method, route template, status, request ID, and redacted response shape.
- Separate authentication, authorization, payment, validation, absence, conflict, and throttling failures.
- Check the live endpoint reference and exact required scope.
- Reproduce with a synthetic read-only request where possible.
- Apply the smallest configuration or code correction.
- Record evidence and stop before any destructive retry.
Show full SKILL.md (190 more words)Show less
Approval Boundaries
Do not create, rotate, reveal, or revoke keys; invite or remove members; delegate across workspaces; connect sending accounts; create or activate campaigns; import or delete leads; change suppression or retention; register, patch, resume, or delete webhooks; alter plans or paid capacity; transmit diagnostics; or perform another production mutation without explicit approval from the accountable owner. Keep diagnosis read-only unless implementation was requested.
Output
Return the workspace-safe scope, files and contracts inspected, exact API v2 routes and required scopes, evidence collected, validation result, sensitive fields redacted, remaining risk, accountable owner, approval state, and rollback or next action.
Error Handling
| Condition | Response |
|---|---|
401 | Stop and verify that the bearer key exists, is current, and was not revoked. |
403 | Stop and compare the operation with its exact required scope; do not broaden to all:all by default. |
429 | Coordinate the workspace-wide budget, honor endpoint overrides, and bound retries. |
| Schema or tenant mismatch | Fail closed, preserve redacted evidence, and do not retry a mutation. |
Examples
Use a compact handoff that makes scope, mutation authority, and evidence reviewable.
Input:
status=403; operation=campaigns.list; key=redactedExpected handoff:
cause=missing campaigns:read; action=create least-privilege replacement key after approvalResources
© 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
SKILL.md and 1 other file (references) in skills/.curated/instantly-common-errors of jeremylongshore/tons-of-skills-marketplace.
- SKILL.md
- references/official-docs.md
Open the folder on GitHubat commit cfae287
Compare with similar skills
Instantly 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Instantly Common Errors this skilljeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Fortify Developmentcoollabsio/coolify | 63k | 4 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Supabase Development and Debuggingsupabase/agent-skills | 2.7k | 3 repos | ~3.6k | Automated safety check: Pass | MIT | |
| Better Auth Best Practiceslatitude-dev/latitude-llm | 4.7k | 7 repos | ~1.6k | Automated safety check: Pass | MIT | |
| Gitnexus Exploringaws-samples/sample-kolya-br-proxy | 106 | 12 repos | ~749 | Automated safety check: Pass | MIT-0 | |
| Supabasecurvenote/curvenote | 170 | 5 repos | ~2.2k | Automated safety check: Pass | Custom licence |
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Questions about Instantly Common Errors
What does Instantly Common Errors do?
Diagnose Instantly API v2 authentication, scope, validation, quota, and resource errors without unsafe retries. Instantly Common Errors is an agent skill from jeremylongshore/tons-of-skills-marketplace. Diagnose Instantly API v2 authentication, scope, validation, quota, and resource errors without unsafe retries.
When should I use Instantly Common Errors?
Instantly Common Errors fits situations like: A request fails; returns an unfamiliar status; with debug Instantly 401; fix Instantly 429.
How do I install Instantly Common Errors in Claude Code?
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a claude-code`. Or copy the skill folder (skills/.curated/instantly-common-errors in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/instantly-common-errors in your project. Claude Code loads it when a task matches its description.
How do I install Instantly Common Errors in Codex?
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-common-errors -a codex`. Or copy the skill folder (skills/.curated/instantly-common-errors in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/instantly-common-errors in your project. Codex loads it when a task matches its description.
Can I use Instantly 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 instantly-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/instantly-common-errors, .gemini/skills/instantly-common-errors, .github/skills/instantly-common-errors and .opencode/skills/instantly-common-errors in your project.
What does Instantly Common Errors need to run?
SKILL.md names no scripts, command-line tools or credentials: Instantly Common Errors is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep, WebFetch, Write, Edit. Compatibility (from SKILL.md): Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key.
Does Instantly Common Errors access the network?
SKILL.md names 2 domains. In commands or code: api.instantly.ai; the agent is likely to contact it when it follows the instructions. As links in the text: developer.instantly.ai. This is read from the text; nothing was executed.
Is Instantly 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 Instantly Common Errors use?
Instantly 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 Instantly Common Errors use?
About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 688 tokens, read only when the agent opens those files.
What are the alternatives to Instantly Common Errors?
Skills that share tags, products or a category with Instantly Common Errors: Fortify Development (coollabsio/coolify, 63k stars), Supabase Development and Debugging (supabase/agent-skills, 2.7k stars), Better Auth Best Practices (latitude-dev/latitude-llm, 4.7k stars) and Gitnexus Exploring (aws-samples/sample-kolya-br-proxy, 106 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Instantly Common Errors?
jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 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.