Agent skill

Huma

Huma - Go REST/RPC API Framework. An agent skill from getopenpost/openpost.

AGPL-3.0Auto-check passedBackend & APIs

Install Huma

skills CLI

$ npx skills add getopenpost/openpost --skill huma -a claude-code

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

GitHub CLI

$ gh skill install getopenpost/openpost huma --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/getopenpost/openpost.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/huma .claude/skills/huma && 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/

Paste into Claude Code

Install the "huma" agent skill from https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma into .claude/skills/huma/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "huma", 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

$skill-installer install https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma

Type 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.

skills CLI

$ npx skills add getopenpost/openpost --skill huma -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install getopenpost/openpost huma --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/getopenpost/openpost.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/huma .agents/skills/huma && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "huma" agent skill from https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma into .agents/skills/huma/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "huma", 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.

skills CLI

$ npx skills add getopenpost/openpost --skill huma -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install getopenpost/openpost huma --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/getopenpost/openpost.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/huma .cursor/skills/huma && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "huma" agent skill from https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma into .cursor/skills/huma/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "huma", 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

$ gemini skills install https://github.com/getopenpost/openpost.git --path .agents/skills/huma

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add getopenpost/openpost --skill huma -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install getopenpost/openpost huma --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/getopenpost/openpost.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/huma .gemini/skills/huma && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "huma" agent skill from https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma into .gemini/skills/huma/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "huma", 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.

GitHub CLI

$ gh skill install getopenpost/openpost huma

Installs 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).

skills CLI

$ npx skills add getopenpost/openpost --skill huma -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/getopenpost/openpost.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/huma .github/skills/huma && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "huma" agent skill from https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma into .github/skills/huma/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "huma", 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.

skills CLI

$ npx skills add getopenpost/openpost --skill huma -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install getopenpost/openpost huma --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/getopenpost/openpost.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/huma .opencode/skills/huma && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "huma" agent skill from https://github.com/getopenpost/openpost/tree/main/.agents/skills/huma into .opencode/skills/huma/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "huma", 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: huma
GitHub stars: 653
Token cost: ~1k tokens
SKILL.md length: 214 words
Files: 1
Skills in repo: 7
Repo updated: Oct 6, 2026
First seen: Oct 7, 2026
Licence: AGPL-3.0

At a glance

Huma - Go REST/RPC API Framework. An agent skill from getopenpost/openpost.

Works in 4 steps: Don't return *models.Model directly if… → Handler methods should take api huma.API… → huma.WriteErr(api, ctx, status, msg)… → …
Tasks that involve OpenAPI specifications
SKILL.md covers Core Pattern, Input/Output Structs, Validation Tags and Error Handling, plus 5 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Huma is an agent skill from getopenpost/openpost. Huma - Go REST/RPC API Framework. Use with Echo adapter (humaecho) for OpenAPI 3.1 generation.

Its SKILL.md is about 1k 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 Backend & APIs, covering OpenAPI specifications. It works with OpenAPI. The repository describes itself as: Create, adapt, schedule, and track social posts. Open-source, hosted or self-hosted. The licence is AGPL-3.0.

When your agent uses it

Tasks that involve OpenAPI specifications

Example prompts

“/huma”

Workflow steps

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

Don't return *models.Model directly if it has fields named Status, CreatedAt etc. — use explicit output structs with Body wrapper
Handler methods should take api huma.API and call huma.Register internally (method-as-registrar pattern)
huma.WriteErr(api, ctx, status, msg) needs the API reference — pass it via closure in middleware factories
huma.WithValue takes 3 args: (ctx, key, value), not (ctx, context.Context)

What it can do on your machine

Read from SKILL.md and the folder at commit ed8ad44. 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 (its code samples are go).
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

Huma loads about 1k tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 214 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~25
When it runs · the whole SKILL.md, loaded when a task matches: ~1k

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 getopenpost/openpost at commit ed8ad44, republished under its AGPL-3.0 licence (© getopenpost). 214 words, ~1,002 tokens.

Download SKILL.mdSave it as .claude/skills/huma/SKILL.md (or your agent's skills folder).

name: huma
description: Huma - Go REST/RPC API Framework. Use with Echo adapter (humaecho) for OpenAPI 3.1 generation.
version: 1.0.0
user-invocable: false

Huma - Go REST/RPC API Framework

Huma generates OpenAPI 3.1 from Go types with zero annotations beyond struct tags. Use the Echo adapter (humaecho) for this project.

Core Pattern

import (
    "github.com/danielgtaylor/huma/v2"
    "github.com/danielgtaylor/huma/v2/adapters/humaecho"
)

// Setup in main.go
apiGroup := e.Group("/api/v1")
api := humaecho.NewWithGroup(e, apiGroup, huma.DefaultConfig("API", "1.0.0"))

// Handler registration - auto-generates OpenAPI
huma.Register(api, huma.Operation{
    OperationID: "get-user",
    Method:      http.MethodGet,
    Path:        "/users/{id}",
    Summary:     "Get a user",
    Tags:        []string{"Users"},
    Errors:      []int{404},
}, func(ctx context.Context, input *GetUserInput) (*GetUserOutput, error) {
    // handler logic
})

Input/Output Structs

Input structs use tags for path, query, header, body parameters. Output structs define response shape. Always wrap outputs in explicit Body field to avoid Huma interpreting fields as headers.

type GetUserInput struct {
    ID    string `path:"id" doc:"User ID"`
    Verbose bool `query:"verbose" doc:"Include extra details"`
    // Body is optional for GET
}

type GetUserOutput struct {
    Body struct {
        ID   string `json:"id"`
        Name string `json:"name"`
    }
}

IMPORTANT: Fields named Status on output structs must use Body wrapper, otherwise Huma interprets them as HTTP status codes (must be int). Same for CreatedAt which gets treated as response headers.

Validation Tags

type CreateInput struct {
    Body struct {
        Name     string `json:"name" minLength:"1" maxLength:"100"`
        Email    string `json:"email" format:"email"`
        Age      int    `json:"age" minimum:"0" maximum:"150"`
        Role     string `json:"role" enum:"admin,user,guest"`
        Tags     []string `json:"tags" minItems:"1" uniqueItems:"true"`
    }
}

Error Handling

return nil, huma.Error404NotFound("not found")
return nil, huma.Error400BadRequest("bad request", &huma.ErrorDetail{...})
return nil, huma.Error401Unauthorized("unauthorized")
return nil, huma.Error500InternalServerError("internal error")

Middleware

Huma middleware signature: func(ctx huma.Context, next func(huma.Context))

// Per-operation middleware
huma.Register(api, huma.Operation{
    Middlewares: huma.Middlewares{authMiddleware},
}, handler)

// Global middleware
api.UseMiddleware(loggingMiddleware)

// Context values
ctx = huma.WithValue(ctx, key, value)
val := ctx.Context().Value(key)

Echo Adapter Notes

humaecho.New(echo, config) - creates API from Echo instance
humaecho.NewWithGroup(echo, group, config) - creates API for a group path
Path conversion: Huma {param} → Echo :param (automatic)
Error writing requires API reference: pass api to middleware factory

OpenAPI Spec

The spec is auto-generated. Access via api.OpenAPI() and serve as JSON:

e.GET("/openapi.json", func(c echo.Context) error {
    data, _ := json.Marshal(api.OpenAPI())
    return c.Blob(http.StatusOK, "application/json", data)
})

Convenience Methods

huma.Get(api, "/items", handler)    // auto-generates operation ID
huma.Post(api, "/items", handler)
huma.Put(api, "/items/{id}", handler)
huma.Delete(api, "/items/{id}", handler)

Gotchas

Don't return *models.Model directly if it has fields named Status, CreatedAt etc. — use explicit output structs with Body wrapper
Handler methods should take api huma.API and call huma.Register internally (method-as-registrar pattern)
huma.WriteErr(api, ctx, status, msg) needs the API reference — pass it via closure in middleware factories
huma.WithValue takes 3 args: (ctx, key, value), not (ctx, context.Context)

Files

Just SKILL.md in .agents/skills/huma of getopenpost/openpost.

Open the folder on GitHubat commit ed8ad44

Compare with similar skills

Huma 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.

Huma compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Huma this skillgetopenpost/openpost	653	—	~1k	Automated safety check: Pass	AGPL-3.0	yesterday
ToolJet Marketplace Plugin BuilderToolJet/ToolJet	41k	—	~2.1k	Automated safety check: Pass	AGPL-3.0	today
Step Partsearthtojake/text-to-cad	18k	1 repos	~1.5k	Automated safety check: Pass	MIT	today
API DesignerJeffallan/claude-skills	12k	2 repos	~2k	Automated safety check: Pass	MIT	4 days ago
OpenAPI to MCP Servermcp-use/mcp-use	11k	—	~5.2k	Automated safety check: Pass	Apache-2.0	today
Use Yaakmountain-loop/yaak	19k	—	~1.9k	Automated safety check: Pass	MIT	today

Similar skills

ToolJet Marketplace Plugin Builder
ToolJet/ToolJet
Turns an API description, such as an OpenAPI file or a Postman collection, into a connector plugin for ToolJet's marketplace and checks it with the repo's validator.
41k GitHub stars~2.1k tokensUpdated today
Backend & APIsAuto-check passed
Step Parts
earthtojake/text-to-cad
Find, evaluate, and download common purchasable CAD parts from step.parts, including named off-the-shelf actuators, servos, motors, electronics boards, connectors, screws, bolts, nuts, washers…
18k GitHub starsUsed in 1 repo~1.5k tokens
Backend & APIsAuto-check passed
API Designer
Jeffallan/claude-skills
Designs REST and GraphQL APIs from resource modeling to an OpenAPI 3.1 contract, with versioning, pagination and RFC 7807 error handling.
12k GitHub starsUsed in 2 repos~2k tokens
Backend & APIsAuto-check passed
OpenAPI to MCP Server
mcp-use/mcp-use
Turns an OpenAPI or Swagger spec into an MCP server with the mcp-use TypeScript SDK, mapping each operation to a tool, wiring auth, testing and deploying.
11k GitHub stars~5.2k tokensUpdated today
Backend & APIsAuto-check passed
Use Yaak
mountain-loop/yaak
A skill your agent uses when the user mentions Yaak, a Yaak workspace, or the yaak command, or asks to call, hit, or smoke test HTTP/REST endpoints, save or organize API requests for reuse or manual…
19k GitHub stars~1.9k tokensUpdated today
Backend & APIsAuto-check passed
Old Coder API Design
AmazingAng/old-coder
Reviews or designs an HTTP/JSON API's endpoints, auth, pagination, versioning and deprecations, guarding against inventing a bespoke interface or silently breaking consumers.
749 GitHub starsUsed in 1 repo~3.4k tokens
Backend & APIsAuto-check passed

Questions about Huma

What does Huma do?

Huma - Go REST/RPC API Framework. An agent skill from getopenpost/openpost. Huma is an agent skill from getopenpost/openpost. Huma - Go REST/RPC API Framework.

When should I use Huma?

Huma fits situations like: tasks that involve OpenAPI specifications.

How do I install Huma in Claude Code?

Run `npx skills add getopenpost/openpost --skill huma -a claude-code`. Or copy the skill folder (.agents/skills/huma in getopenpost/openpost) into .claude/skills/huma in your project. Claude Code loads it when a task matches its description.

How do I install Huma in Codex?

Run `npx skills add getopenpost/openpost --skill huma -a codex`. Or copy the skill folder (.agents/skills/huma in getopenpost/openpost) into .agents/skills/huma in your project. Codex loads it when a task matches its description.

Can I use Huma 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 getopenpost/openpost --skill huma -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/huma, .gemini/skills/huma, .github/skills/huma and .opencode/skills/huma in your project.

What does Huma need to run?

SKILL.md names no scripts, command-line tools or credentials: Huma is instructions for the agent only.

Does Huma 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 Huma 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 Huma use?

Huma 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 Huma use?

About 1k tokens (SKILL.md is roughly 4k 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 Huma?

Skills that share tags, products or a category with Huma: ToolJet Marketplace Plugin Builder (ToolJet/ToolJet, 41k stars), Step Parts (earthtojake/text-to-cad, 18k stars), API Designer (Jeffallan/claude-skills, 12k stars) and OpenAPI to MCP Server (mcp-use/mcp-use, 11k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Huma?

getopenpost (a GitHub organization) maintains it in getopenpost/openpost, which has 653 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 6, 2026.

Source: getopenpost/openpost on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Huma

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Huma - Go REST/RPC API Framework

Core Pattern

Input/Output Structs

Validation Tags

Error Handling

Middleware

Echo Adapter Notes

OpenAPI Spec

Convenience Methods

Gotchas

Files

Compare with similar skills

Similar skills

More from getopenpost/openpost

Related

Questions about Huma