Gumroad Prod Console
antiwork/gumroad
Execute read-only Ruby/Rails commands against Gumroad's production database for debugging and investigation.
Fix misleading HTTP response header values when debugging with curl -I or curl -sI.
Install Curl Head Vs Get Header Debugging
$ npx skills add divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install divinevideo/divine-mobile curl-head-vs-get-header-debugging --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/divinevideo/divine-mobile.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/curl-head-vs-get-header-debugging .claude/skills/curl-head-vs-get-header-debugging && 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 "curl-head-vs-get-header-debugging" agent skill from https://github.com/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debugging into .claude/skills/curl-head-vs-get-header-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "curl-head-vs-get-header-debugging", 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/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debuggingType 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 divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install divinevideo/divine-mobile curl-head-vs-get-header-debugging --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/divinevideo/divine-mobile.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/curl-head-vs-get-header-debugging .agents/skills/curl-head-vs-get-header-debugging && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "curl-head-vs-get-header-debugging" agent skill from https://github.com/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debugging into .agents/skills/curl-head-vs-get-header-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "curl-head-vs-get-header-debugging", 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 divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install divinevideo/divine-mobile curl-head-vs-get-header-debugging --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/divinevideo/divine-mobile.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/curl-head-vs-get-header-debugging .cursor/skills/curl-head-vs-get-header-debugging && 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 "curl-head-vs-get-header-debugging" agent skill from https://github.com/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debugging into .cursor/skills/curl-head-vs-get-header-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "curl-head-vs-get-header-debugging", 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/divinevideo/divine-mobile.git --path .agents/skills/curl-head-vs-get-header-debugging--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 divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install divinevideo/divine-mobile curl-head-vs-get-header-debugging --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/divinevideo/divine-mobile.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/curl-head-vs-get-header-debugging .gemini/skills/curl-head-vs-get-header-debugging && 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 "curl-head-vs-get-header-debugging" agent skill from https://github.com/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debugging into .gemini/skills/curl-head-vs-get-header-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "curl-head-vs-get-header-debugging", 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 divinevideo/divine-mobile curl-head-vs-get-header-debuggingInstalls 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 divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/divinevideo/divine-mobile.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/curl-head-vs-get-header-debugging .github/skills/curl-head-vs-get-header-debugging && 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 "curl-head-vs-get-header-debugging" agent skill from https://github.com/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debugging into .github/skills/curl-head-vs-get-header-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "curl-head-vs-get-header-debugging", 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 divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install divinevideo/divine-mobile curl-head-vs-get-header-debugging --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/divinevideo/divine-mobile.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/curl-head-vs-get-header-debugging .opencode/skills/curl-head-vs-get-header-debugging && 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 "curl-head-vs-get-header-debugging" agent skill from https://github.com/divinevideo/divine-mobile/tree/main/.agents/skills/curl-head-vs-get-header-debugging into .opencode/skills/curl-head-vs-get-header-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "curl-head-vs-get-header-debugging", 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
curl-head-vs-get-header-debugging- GitHub stars
- 266
- Token cost
- ~837 tokens
- SKILL.md length
- 248 words
- Files
- 1
- Skills in repo
- 103
- Repo updated
- First seen
- Licence
- MPL-2.0
At a glance
Fix misleading HTTP response header values when debugging with curl -I or curl -sI.
- Response headers differ between curl testing and actual browser/client behavior
- SKILL.md covers Problem, Context / Trigger Conditions, Solution and Verification, plus 2 more sections
- Calls curl
- Other headers show unexpected values despite correct middleware code
What it does
Curl Head Vs Get Header Debugging is an agent skill from divinevideo/divine-mobile. Fix misleading HTTP response header values when debugging with curl -I or curl -sI. Use when: (1) Response headers differ between curl testing and actual browser/client behavior, (2) Cache-Control or other headers show unexpected values despite correct middleware code, (3) Server-side middleware that only applies to GET requests appears to not work when testing with curl -I. The -I flag sends HEAD requests, and middleware that checks for GET method will skip processing, returning handler-level headers instead of…
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.
It sits in Development, covering Debugging and Backend development. The licence is MPL-2.0.
When your agent uses it
- Response headers differ between curl testing and actual browser/client behavior
- Other headers show unexpected values despite correct middleware code
- Server-side middleware that only applies to GET requests appears to not work when testing with curl -I
Example prompts
- “/curl-head-vs-get-header-debugging”
What it can do on your machine
Read from SKILL.md and the folder at commit 4c622be. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
curl
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use curl, which can reach the network depending on how they are called.
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.
Context cost
Curl Head Vs Get Header Debugging loads about 837 tokens when it runs. Until then it costs about 145 tokens; SKILL.md has 248 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 divinevideo/divine-mobile at commit 4c622be, republished under its MPL-2.0 licence (© divinevideo). 248 words, ~837 tokens.
Download SKILL.mdSave it as
.claude/skills/curl-head-vs-get-header-debugging/SKILL.md (or your agent's skills folder).- name
- curl-head-vs-get-header-debugging
- description
- Fix misleading HTTP response header values when debugging with curl -I or curl -sI. Use when: (1) Response headers differ between curl testing and actual browser/client behavior, (2) Cache-Control or other headers show unexpected values despite correct middleware code, (3) Server-side middleware that only applies to GET requests appears to not work when testing with curl -I. The -I flag sends HEAD requests, and middleware that checks for GET method will skip processing, returning handler-level headers instead of middleware-overridden ones.
- author
- Claude Code
- version
- 1.0.0
- date
- 2026-03-31
curl -I Sends HEAD, Not GET — Header Debugging Trap
Problem
When debugging HTTP response headers with curl -I or curl -sI, the response may show
different header values than what actual GET requests receive. This is because -I sends
a HEAD request, and server middleware that only processes GET requests will be skipped.
Context / Trigger Conditions
- Testing cache headers with
curl -sIand seeing unexpected values - Middleware that checks
method == GETbefore setting headers (common in cache middleware) - Headers appear correct in automated tests but wrong in manual curl testing
Cache-Control,Surrogate-Control, orSurrogate-Keyvalues don't match expectations- Axum/Express/any framework middleware with method guards
Solution
Use curl -s -D - -o /dev/null instead of curl -I to get response headers from a GET request:
# WRONG — sends HEAD request, middleware may skip processing
curl -sI https://example.com/api/endpoint
# CORRECT — sends GET request, dumps headers, discards body
curl -s -D - -o /dev/null https://example.com/api/endpointIf you need just specific headers:
curl -s -D - -o /dev/null https://example.com/api/endpoint | grep -iE 'cache-control|surrogate'Verification
Compare output from both methods:
echo "=== HEAD (curl -I) ==="
curl -sI https://example.com/api/endpoint | grep cache-control
echo "=== GET (curl -D) ==="
curl -s -D - -o /dev/null https://example.com/api/endpoint | grep cache-controlIf the values differ, your middleware has a GET-only guard (which is correct behavior).
Example
Axum middleware that only sets cache headers for GET requests:
async fn cache_middleware(request: Request, next: Next) -> Response {
let method = request.method().clone();
let mut response = next.run(request).await;
// HEAD requests skip this — curl -I won't see these headers!
if method != Method::GET {
return response;
}
response.headers_mut().insert("cache-control", ...);
response.headers_mut().insert("surrogate-control", ...);
response
}Notes
- This is NOT a bug — it's correct behavior. Cache headers should only apply to cacheable GET responses.
- HTTP spec says HEAD responses SHOULD include the same headers as GET, but middleware implementations often don't replicate this because HEAD is rarely used by CDNs or browsers for caching decisions.
- Fastly, Cloudflare, and other CDNs send GET requests to origins, so the cache behavior is correct
even if
curl -Ishows different headers. - This trap is especially insidious because
curl -Iis the most common way to check headers.
© divinevideo, MPL-2.0. 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 .agents/skills/curl-head-vs-get-header-debugging of divinevideo/divine-mobile.
Open the folder on GitHubat commit 4c622be
Compare with similar skills
Curl Head Vs Get Header Debugging 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 |
|---|---|---|---|---|---|---|
| Curl Head Vs Get Header Debugging this skilldivinevideo/divine-mobile | 266 | — | ~837 | Automated safety check: Pass | MPL-2.0 | |
| Gumroad Prod Consoleantiwork/gumroad | 9.8k | — | ~2.9k | Automated safety check: Notes | MIT | |
| Renderdoc GPU Debugrudybear/renderdoc-skill | 211 | — | ~4k | Automated safety check: Pass | MIT | |
| Flowfile Debugging PlaybookEdwardvaneechoud/Flowfile | 373 | — | ~6.3k | Automated safety check: Pass | MIT | |
| Octane Frankenphp GotchasAratKruglik/claude-laravel | 155 | — | ~732 | Automated safety check: Pass | None | |
| Config Loader Helperpilinux/gorest | 506 | — | ~441 | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Curl Head Vs Get Header Debugging
What does Curl Head Vs Get Header Debugging do?
Fix misleading HTTP response header values when debugging with curl -I or curl -sI. Curl Head Vs Get Header Debugging is an agent skill from divinevideo/divine-mobile. Fix misleading HTTP response header values when debugging with curl -I or curl -sI.
When should I use Curl Head Vs Get Header Debugging?
Curl Head Vs Get Header Debugging fits situations like: response headers differ between curl testing and actual browser/client behavior; other headers show unexpected values despite correct middleware code; server-side middleware that only applies to GET requests appears to not work when testing with curl -I.
How do I install Curl Head Vs Get Header Debugging in Claude Code?
Run `npx skills add divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a claude-code`. Or copy the skill folder (.agents/skills/curl-head-vs-get-header-debugging in divinevideo/divine-mobile) into .claude/skills/curl-head-vs-get-header-debugging in your project. Claude Code loads it when a task matches its description.
How do I install Curl Head Vs Get Header Debugging in Codex?
Run `npx skills add divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a codex`. Or copy the skill folder (.agents/skills/curl-head-vs-get-header-debugging in divinevideo/divine-mobile) into .agents/skills/curl-head-vs-get-header-debugging in your project. Codex loads it when a task matches its description.
Can I use Curl Head Vs Get Header Debugging 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 divinevideo/divine-mobile --skill curl-head-vs-get-header-debugging -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/curl-head-vs-get-header-debugging, .gemini/skills/curl-head-vs-get-header-debugging, .github/skills/curl-head-vs-get-header-debugging and .opencode/skills/curl-head-vs-get-header-debugging in your project.
What does Curl Head Vs Get Header Debugging need to run?
Going by SKILL.md and its folder, Curl Head Vs Get Header Debugging needs the command-line tools its instructions call (curl).
Does Curl Head Vs Get Header Debugging access the network?
SKILL.md contains no URLs. Its commands use curl, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Curl Head Vs Get Header Debugging 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 Curl Head Vs Get Header Debugging use?
Curl Head Vs Get Header Debugging is published under the MPL-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Curl Head Vs Get Header Debugging 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 Curl Head Vs Get Header Debugging?
Skills that share tags, products or a category with Curl Head Vs Get Header Debugging: Gumroad Prod Console (antiwork/gumroad, 9.8k stars), Renderdoc GPU Debug (rudybear/renderdoc-skill, 211 stars), Flowfile Debugging Playbook (Edwardvaneechoud/Flowfile, 373 stars) and Octane Frankenphp Gotchas (AratKruglik/claude-laravel, 155 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Curl Head Vs Get Header Debugging?
divinevideo (a GitHub organization) maintains it in divinevideo/divine-mobile, which has 266 GitHub stars. The repository holds 103 skills in this directory. The repository was last updated on October 8, 2026.
Source: divinevideo/divine-mobile on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.