MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Manage Haft's typed specification lifecycle and source-currentness repair: inspect current SpecSections, draft or clarify carriers, classify FPF semantic fanout, record operator-requested spec…
Install H Spec
$ npx skills add m0n0x41d/haft --skill h-spec -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install m0n0x41d/haft h-spec --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/m0n0x41d/haft.git skills-src && mkdir -p .claude/skills && cp -r skills-src/internal/cli/skill/h-spec .claude/skills/h-spec && 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 "h-spec" agent skill from https://github.com/m0n0x41d/haft/tree/main/internal/cli/skill/h-spec into .claude/skills/h-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "h-spec", 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/m0n0x41d/haft/tree/main/internal/cli/skill/h-specType 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 m0n0x41d/haft --skill h-spec -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install m0n0x41d/haft h-spec --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/m0n0x41d/haft.git skills-src && mkdir -p .agents/skills && cp -r skills-src/internal/cli/skill/h-spec .agents/skills/h-spec && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "h-spec" agent skill from https://github.com/m0n0x41d/haft/tree/main/internal/cli/skill/h-spec into .agents/skills/h-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "h-spec", 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 m0n0x41d/haft --skill h-spec -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install m0n0x41d/haft h-spec --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/m0n0x41d/haft.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/internal/cli/skill/h-spec .cursor/skills/h-spec && 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 "h-spec" agent skill from https://github.com/m0n0x41d/haft/tree/main/internal/cli/skill/h-spec into .cursor/skills/h-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "h-spec", 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/m0n0x41d/haft.git --path internal/cli/skill/h-spec--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 m0n0x41d/haft --skill h-spec -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install m0n0x41d/haft h-spec --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/m0n0x41d/haft.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/internal/cli/skill/h-spec .gemini/skills/h-spec && 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 "h-spec" agent skill from https://github.com/m0n0x41d/haft/tree/main/internal/cli/skill/h-spec into .gemini/skills/h-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "h-spec", 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 m0n0x41d/haft h-specInstalls 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 m0n0x41d/haft --skill h-spec -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/m0n0x41d/haft.git skills-src && mkdir -p .github/skills && cp -r skills-src/internal/cli/skill/h-spec .github/skills/h-spec && 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 "h-spec" agent skill from https://github.com/m0n0x41d/haft/tree/main/internal/cli/skill/h-spec into .github/skills/h-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "h-spec", 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 m0n0x41d/haft --skill h-spec -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install m0n0x41d/haft h-spec --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/m0n0x41d/haft.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/internal/cli/skill/h-spec .opencode/skills/h-spec && 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 "h-spec" agent skill from https://github.com/m0n0x41d/haft/tree/main/internal/cli/skill/h-spec into .opencode/skills/h-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "h-spec", 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
h-spec- GitHub stars
- 1.4k
- Token cost
- ~3.4k tokens
- SKILL.md length
- 1,650 words
- Files
- 1
- Skills in repo
- 24
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Manage Haft's typed specification lifecycle and source-currentness repair: inspect current SpecSections, draft or clarify carriers, classify FPF semantic fanout, record operator-requested spec…
- Works in 6 steps: Read lifecycle first → Draft or clarify → Record an operator-requested change → …
- Stale spec sections
- SKILL.md covers Conditional project-memory…, 1. Read lifecycle first, 2. Draft or clarify and 3. Record an…, plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
H Spec is an agent skill from m0n0x41d/haft. Manage Haft's typed specification lifecycle and source-currentness repair: inspect current SpecSections, draft or clarify carriers, classify FPF semantic fanout, record operator-requested spec changes, and cross explicit approve/rebaseline/reopen gates only with human authorization. Use for "spec status", "update specs", "запиши в спеки", stale spec sections, newer FPF source revisions, or semantic changes that must be repaired across several spec carriers. Treat markdown as a carrier and the kernel projection as…
Its SKILL.md is about 3.4k 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 Agent Workflows. The repository describes itself as: Engineering decisions engine that know when they're stale. Frame, compare, decide — with evidence decay and parity enforcement. For Claude Code, Cursor, Gemini CLI, Codex and more.
When your agent uses it
- Stale spec sections
- Newer FPF source revisions
- Semantic changes that must be repaired across several spec carriers
Example prompts
- “spec status”
- “update specs”
- “/h-spec”
Requirements
- Pre-approved tools (allowed-tools): Bash, Read, Grep, Glob, Write, Edit, mcp__haft__haft_query, mcp__haft__haft_spec_section, mcp__haft__haft_onboard
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- Read lifecycle first
- Draft or clarify
- Record an operator-requested change
- Internal semantic fanout review
- Human gates
- Relate the current edition to project memory
What it can do on your machine
Read from SKILL.md and the folder at commit e0c63f4. 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:
BashReadGrepGlobWriteEditmcp__haft__haft_querymcp__haft__haft_spec_sectionmcp__haft__haft_onboard
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
H Spec loads about 3.4k tokens when it runs. Until then it costs about 158 tokens; SKILL.md has 1,650 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Bash, Read, Grep, Glob, Write, Edit, mcp__haft__haft_query, mcp__haft__haft_spec_section, mcp__haft_
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,650 words (~3,421 tokens).
“Keep object, description, carrier, and authority separate:”
- name
- h-spec
- allowed-tools
- Bash, Read, Grep, Glob, Write, Edit, mcp__haft__haft_query, mcp__haft__haft_spec_section, mcp__haft__haft_onboard
- when_to_use
- A specification description, carrier, lifecycle state, or cross-carrier semantic repair is current.
- argument-hint
- [spec question, section id, or clarification]
Files
Just SKILL.md in internal/cli/skill/h-spec of m0n0x41d/haft.
Open the folder on GitHubat commit e0c63f4
Compare with similar skills
H Spec 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 |
|---|---|---|---|---|---|---|
| H Spec this skillm0n0x41d/haft | 1.4k | — | ~3.4k | Automated safety check: Notes | Custom licence | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 35 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 297k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Skill CreatorAzure/azqr | 796 | 89 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 |
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Hook Development for Claude Code Plugins
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Using Superpowers
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A skill your agent uses when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
Executing Plans Inline
obra/superpowers
Has the agent carry out an implementation plan itself, task by task in the current session, keeping a ledger, proving each step with a test and ending with one whole-branch review.
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Create new skills, modify and improve existing skills, and measure skill performance.
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Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
More from m0n0x41d/haft
All 24 skills in this repoH Decide
m0n0x41d/haft
Routes one direct, unambiguous operator request to bind a bounded choice as a DecisionRecord.
H Explore
m0n0x41d/haft
Generate 3-5 genuinely distinct candidate approaches for a current question, with the weakest link of each kept visible.
H Frame
m0n0x41d/haft
Shape an engineering problem without assuming a solution or forcing a project phase.
H Onboard
m0n0x41d/haft
Bootstrap Haft through one readable onboarding surface, prepare an initial profile review or one bounded existing-scope relation change, and orient applicable specification carriers.
H Status
m0n0x41d/haft
Read-only Haft project cockpit for active problems, decisions, notes, evidence freshness, drift, commissions, spec lifecycle, module decision coverage, and bounded exact file-link gaps from a…
H Verify
m0n0x41d/haft
Verifies that a recorded DecisionRecord still holds — baseline-vs-measure evidence loop with drift detection per FPF Evidence Decay.
Related
Categories
Questions about H Spec
What does H Spec do?
Manage Haft's typed specification lifecycle and source-currentness repair: inspect current SpecSections, draft or clarify carriers, classify FPF semantic fanout, record operator-requested spec…. H Spec is an agent skill from m0n0x41d/haft. Manage Haft's typed specification lifecycle and source-currentness repair: inspect current SpecSections, draft or clarify carriers, classify FPF semantic fanout, record operator-requested spec changes, and cross explicit approve/rebaseline/reopen gates only with human authorization.
When should I use H Spec?
H Spec fits situations like: stale spec sections; newer FPF source revisions; semantic changes that must be repaired across several spec carriers.
How do I install H Spec in Claude Code?
Run `npx skills add m0n0x41d/haft --skill h-spec -a claude-code`. Or copy the skill folder (internal/cli/skill/h-spec in m0n0x41d/haft) into .claude/skills/h-spec in your project. Claude Code loads it when a task matches its description.
How do I install H Spec in Codex?
Run `npx skills add m0n0x41d/haft --skill h-spec -a codex`. Or copy the skill folder (internal/cli/skill/h-spec in m0n0x41d/haft) into .agents/skills/h-spec in your project. Codex loads it when a task matches its description.
Can I use H Spec 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 m0n0x41d/haft --skill h-spec -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/h-spec, .gemini/skills/h-spec, .github/skills/h-spec and .opencode/skills/h-spec in your project.
What does H Spec need to run?
SKILL.md names no scripts, command-line tools or credentials: H Spec is instructions for the agent only. Its frontmatter pre-approves these tools: Bash, Read, Grep, Glob, Write, Edit, mcp__haft__haft_query, mcp__haft__haft_spec_section, mcp__haft__haft_onboard.
Does H Spec 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 H Spec safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does H Spec use?
H Spec has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does H Spec use?
About 3.4k tokens (SKILL.md is roughly 14k 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 H Spec?
Skills that share tags, products or a category with H Spec: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 297k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains H Spec?
m0n0x41d (a GitHub user) maintains it in m0n0x41d/haft, which has 1,397 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on September 28, 2026.
Source: m0n0x41d/haft on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.