Rust
pgdogdev/pgdog
Rust coding best practices for idiomatic, efficient, and maintainable code.
Route HTTP intermediary testing across request normalization, web-cache behavior, and offline traffic evidence.
Install Test HTTP Intermediaries
$ npx skills add cyberful/cyberful --skill test-http-intermediaries -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install cyberful/cyberful test-http-intermediaries --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/cyberful/cyberful.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cyberful/builtin/skills/test-http-intermediaries .claude/skills/test-http-intermediaries && 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 "test-http-intermediaries" agent skill from https://github.com/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediaries into .claude/skills/test-http-intermediaries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-http-intermediaries", 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/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediariesType 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 cyberful/cyberful --skill test-http-intermediaries -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install cyberful/cyberful test-http-intermediaries --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cyberful/cyberful.git skills-src && mkdir -p .agents/skills && cp -r skills-src/cyberful/builtin/skills/test-http-intermediaries .agents/skills/test-http-intermediaries && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "test-http-intermediaries" agent skill from https://github.com/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediaries into .agents/skills/test-http-intermediaries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-http-intermediaries", 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 cyberful/cyberful --skill test-http-intermediaries -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install cyberful/cyberful test-http-intermediaries --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cyberful/cyberful.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/cyberful/builtin/skills/test-http-intermediaries .cursor/skills/test-http-intermediaries && 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 "test-http-intermediaries" agent skill from https://github.com/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediaries into .cursor/skills/test-http-intermediaries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-http-intermediaries", 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/cyberful/cyberful.git --path cyberful/builtin/skills/test-http-intermediaries--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 cyberful/cyberful --skill test-http-intermediaries -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install cyberful/cyberful test-http-intermediaries --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cyberful/cyberful.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/cyberful/builtin/skills/test-http-intermediaries .gemini/skills/test-http-intermediaries && 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 "test-http-intermediaries" agent skill from https://github.com/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediaries into .gemini/skills/test-http-intermediaries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-http-intermediaries", 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 cyberful/cyberful test-http-intermediariesInstalls 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 cyberful/cyberful --skill test-http-intermediaries -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/cyberful/cyberful.git skills-src && mkdir -p .github/skills && cp -r skills-src/cyberful/builtin/skills/test-http-intermediaries .github/skills/test-http-intermediaries && 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 "test-http-intermediaries" agent skill from https://github.com/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediaries into .github/skills/test-http-intermediaries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-http-intermediaries", 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 cyberful/cyberful --skill test-http-intermediaries -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install cyberful/cyberful test-http-intermediaries --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cyberful/cyberful.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/cyberful/builtin/skills/test-http-intermediaries .opencode/skills/test-http-intermediaries && 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 "test-http-intermediaries" agent skill from https://github.com/cyberful/cyberful/tree/main/cyberful/builtin/skills/test-http-intermediaries into .opencode/skills/test-http-intermediaries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-http-intermediaries", 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
test-http-intermediaries- GitHub stars
- 135
- Token cost
- ~630 tokens
- SKILL.md length
- 203 words
- Files
- 2
- Skills in repo
- 85
- Repo updated
- First seen
- Licence
- AGPL-3.0
At a glance
Route HTTP intermediary testing across request normalization, web-cache behavior, and offline traffic evidence.
- Reverse proxies
- SKILL.md covers Route by evidence question and Establish the shared hop model
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Origins may disagree about message boundaries
What it does
Test HTTP Intermediaries is an agent skill from cyberful/cyberful. Route HTTP intermediary testing across request normalization, web-cache behavior, and offline traffic evidence. Use when clients, CDNs, reverse proxies, gateways, meshes, caches, frameworks, or origins may disagree about message boundaries, routing, identity, normalization, or cache keys.
Its SKILL.md is about 630 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
It sits in Databases, covering Database schema design and Cloud networking. The repository describes itself as: Cyberful is an open-source AI Red Team for discovering, exploiting, verifying, and remediating vulnerabilities. The licence is AGPL-3.0.
When your agent uses it
- Reverse proxies
- Origins may disagree about message boundaries
Example prompts
- “/test-http-intermediaries”
What it can do on your machine
Read from SKILL.md and the folder at commit ec598a6. 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
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
No URLs in SKILL.md.
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
Test HTTP Intermediaries loads about 630 tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 203 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 cyberful/cyberful at commit ec598a6, republished under its AGPL-3.0 licence (© cyberful). 203 words, ~630 tokens.
Download SKILL.mdSave it as
.claude/skills/test-http-intermediaries/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- test-http-intermediaries
- description
- Route HTTP intermediary testing across request normalization, web-cache behavior, and offline traffic evidence. Use when clients, CDNs, reverse proxies, gateways, meshes, caches, frameworks, or origins may disagree about message boundaries, routing, identity, normalization, or cache keys.
- metadata.domain
- application-security
- metadata.subdomain
- http-intermediaries
- metadata.triggers
- http request smuggling, http desynchronization, web cache poisoning, cache deception, forwarded header trust, request normalization
- metadata.tags
- http, reverse-proxy, request-smuggling, cache-poisoning, normalization, routing
Test HTTP Intermediaries
Use this router to identify which HTTP interpretation boundary needs specialist handling. Read each selected specialist's SKILL.md completely before applying its procedure.
Route by evidence question
- Message framing, protocol translation, duplicate fields, path/query decoding, authority derivation, forwarded headers, method handling, or hop-to-hop disagreement:
trace-request-normalization. - Cache keys, response-varying inputs, authenticated caching, poisoning, deception, collision, TTL, purge, or partitioning:
test-web-cache-behavior. - HAR, ZAP history, raw request/response captures, proxy traces, cache headers, or repeated observations requiring bounded offline normalization:
analyze-http-traffic-evidence.
Desynchronization begins with trace-request-normalization; use live probes only after the predicted disagreement and safe connection model are explicit. Cache tests begin with test-web-cache-behavior; never place a candidate into a shared victim-reachable key without express authorization.
Establish the shared hop model
Record every client, edge, proxy, protocol translator, gateway, mesh, framework, cache, and origin hop. Capture protocol version, connection reuse, routing authority, decoding order, header rewriting, body limits, cache partitioning, and available component logs. Preserve raw traffic before normalizing it.
Report the exact pair of components that disagreed, the bytes or semantic input that triggered the difference, connection or cache prerequisites, bounded observable effect, controls, and evidence paths. An unstable response, header reflection, or cache hit alone is a lead rather than a confirmed vulnerability.
© cyberful, AGPL-3.0. 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 in cyberful/builtin/skills/test-http-intermediaries of cyberful/cyberful.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit ec598a6
Compare with similar skills
Test HTTP Intermediaries 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 |
|---|---|---|---|---|---|---|
| Test HTTP Intermediaries this skillcyberful/cyberful | 135 | — | ~630 | Automated safety check: Pass | AGPL-3.0 | |
| Rustpgdogdev/pgdog | 5.6k | — | ~1.9k | Automated safety check: Notes | AGPL-3.0 | |
| Querying AWS Cloudwatchaws/agent-toolkit-for-aws | 2.8k | — | ~3.5k | Automated safety check: Pass | Apache-2.0 | |
| System And Data DesignAnastasiyaW/codex-claude-code-config | 154 | — | ~1.7k | Automated safety check: Pass | MIT | |
| Security Stancefjrevoredo/mini-diarium | 308 | — | ~11k | Automated safety check: Pass | MIT | |
| SQL Optimization Patternsynulihao/AgentSkillOS | 617 | 11 repos | ~3.3k | Automated safety check: Pass | None |
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Related
Categories
Questions about Test HTTP Intermediaries
What does Test HTTP Intermediaries do?
Route HTTP intermediary testing across request normalization, web-cache behavior, and offline traffic evidence. Test HTTP Intermediaries is an agent skill from cyberful/cyberful. Route HTTP intermediary testing across request normalization, web-cache behavior, and offline traffic evidence.
When should I use Test HTTP Intermediaries?
Test HTTP Intermediaries fits situations like: reverse proxies; origins may disagree about message boundaries.
How do I install Test HTTP Intermediaries in Claude Code?
Run `npx skills add cyberful/cyberful --skill test-http-intermediaries -a claude-code`. Or copy the skill folder (cyberful/builtin/skills/test-http-intermediaries in cyberful/cyberful) into .claude/skills/test-http-intermediaries in your project. Claude Code loads it when a task matches its description.
How do I install Test HTTP Intermediaries in Codex?
Run `npx skills add cyberful/cyberful --skill test-http-intermediaries -a codex`. Or copy the skill folder (cyberful/builtin/skills/test-http-intermediaries in cyberful/cyberful) into .agents/skills/test-http-intermediaries in your project. Codex loads it when a task matches its description.
Can I use Test HTTP Intermediaries 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 cyberful/cyberful --skill test-http-intermediaries -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-http-intermediaries, .gemini/skills/test-http-intermediaries, .github/skills/test-http-intermediaries and .opencode/skills/test-http-intermediaries in your project.
What does Test HTTP Intermediaries need to run?
SKILL.md names no scripts, command-line tools or credentials: Test HTTP Intermediaries is instructions for the agent only.
Does Test HTTP Intermediaries access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Test HTTP Intermediaries 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 Test HTTP Intermediaries use?
Test HTTP Intermediaries is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Test HTTP Intermediaries use?
About 630 tokens (SKILL.md is roughly 2.5k 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 Test HTTP Intermediaries?
Skills that share tags, products or a category with Test HTTP Intermediaries: Rust (pgdogdev/pgdog, 5.6k stars), Querying AWS Cloudwatch (aws/agent-toolkit-for-aws, 2.8k stars), System And Data Design (AnastasiyaW/codex-claude-code-config, 154 stars) and Security Stance (fjrevoredo/mini-diarium, 308 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Test HTTP Intermediaries?
cyberful (a GitHub organization) maintains it in cyberful/cyberful, which has 135 GitHub stars. The repository holds 85 skills in this directory. The repository was last updated on August 24, 2026.
Source: cyberful/cyberful on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.