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Agent skill

Spk Mission Specify

by spec-kitty in spec-kitty/spec-kitty

Operate the Spec Kitty specify phase: turn user intent into a mission spec while preserving scope, ambiguity, and acceptance criteria.

MITAuto-check passedProduct & Project Management

Install Spk Mission Specify

skills CLI
$ npx skills add spec-kitty/spec-kitty --skill spk-mission-specify -a claude-code

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

GitHub CLI
$ gh skill install spec-kitty/spec-kitty spk-mission-specify --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/spec-kitty/spec-kitty.git skills-src && mkdir -p .claude/skills && cp -r skills-src/src/charter/offering/skills/spk-mission-specify .claude/skills/spk-mission-specify && 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/

Facts

Skill name
spk-mission-specify
GitHub stars
1.7k
Token cost
~269 tokens
SKILL.md length
115 words
Files
1
Skills in repo
45
Repo updated
First seen
Licence
MIT

At a glance

Operate the Spec Kitty specify phase: turn user intent into a mission spec while preserving scope, ambiguity, and acceptance criteria.

  • Works in 6 steps: Run or invoke /spec-kitty.specify for… → Capture the user's concrete goal,… → Keep unresolved product decisions… → …
  • Tasks that involve User stories
  • SKILL.md covers Flow and Output Standard
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Spk Mission Specify is an agent skill from spec-kitty/spec-kitty. Operate the Spec Kitty specify phase: turn user intent into a mission spec while preserving scope, ambiguity, and acceptance criteria.

Its SKILL.md is about 270 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 Product & Project Management, covering User stories. The repository describes itself as: Spec-Driven Development with organizational governance. Specs tell AI agents what to build; Charter governs how they build it. Git-native missions, enforceable workflows, and… The licence is MIT.

When your agent uses it

  • Tasks that involve User stories

Example prompts

  • “/spk-mission-specify”

Workflow steps

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

  1. Run or invoke /spec-kitty.specify for the feature.
  2. Capture the user's concrete goal, constraints, non-goals, and success
  3. Keep unresolved product decisions explicit instead of hiding them in plan
  4. If terminology matters, route to spk-charter-glossary.
  5. If governance affects scope, route to spk-charter-governance.
  6. When a non-trivial user flow, domain lifecycle, rule, or concept boundary is

What it can do on your machine

Read from SKILL.md and the folder at commit d12146f. 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

Spk Mission Specify loads about 269 tokens when it runs. Until then it costs about 39 tokens; SKILL.md has 115 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~39
When it runs · the whole SKILL.md, loaded when a task matches
~269

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 spec-kitty/spec-kitty at commit d12146f, republished under its MIT licence (© spec-kitty). 115 words, ~269 tokens.

Download SKILL.mdSave it as .claude/skills/spk-mission-specify/SKILL.md (or your agent's skills folder).
name
spk-mission-specify
description
Operate the Spec Kitty specify phase: turn user intent into a mission spec while preserving scope, ambiguity, and acceptance criteria.

spk-mission-specify

Use this skill when creating or revising a mission specification.

Flow

  1. Run or invoke /spec-kitty.specify for the feature.
  2. Capture the user's concrete goal, constraints, non-goals, and success criteria.
  3. Keep unresolved product decisions explicit instead of hiding them in plan details.
  4. If terminology matters, route to spk-charter-glossary.
  5. If governance affects scope, route to spk-charter-governance.
  6. When a non-trivial user flow, domain lifecycle, rule, or concept boundary is clearer visually, load spk-practice-show-me and add the smallest useful diagram. Keep implementation choices out of the specification.

Output Standard

The spec should be good enough for /spec-kitty.plan to derive architecture and implementation strategy without inventing product intent. Work packages are authored by /spec-kitty.tasks.

© spec-kitty, MIT. 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 src/charter/offering/skills/spk-mission-specify of spec-kitty/spec-kitty.

Open the folder on GitHubat commit d12146f

Compare with similar skills

Spk Mission Specify 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.

Spk Mission Specify compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Spk Mission Specify this skillspec-kitty/spec-kitty1.7k—~269Automated safety check: PassMIT
User Story Writerdeanpeters/Product-Manager-Skills7.2k2 repos~2.9kAutomated safety check: PassCustom licence
Ralph Tui Create Beadssubsy/ralph-tui2.5k1 repos~2.6kAutomated safety check: PassMIT
Agile Product Owneralirezarezvani/claude-skills28k3 repos~3.2kAutomated safety check: PassMIT
Ralph Tui Create Beads Rustsubsy/ralph-tui2.5k1 repos~2.8kAutomated safety check: PassMIT
To Specbestofjs/bestofjs3.1k21 repos~757Automated safety check: PassMIT

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Categories

Questions about Spk Mission Specify

What does Spk Mission Specify do?

Operate the Spec Kitty specify phase: turn user intent into a mission spec while preserving scope, ambiguity, and acceptance criteria. Spk Mission Specify is an agent skill from spec-kitty/spec-kitty. Operate the Spec Kitty specify phase: turn user intent into a mission spec while preserving scope, ambiguity, and acceptance criteria.

When should I use Spk Mission Specify?

Spk Mission Specify fits situations like: tasks that involve User stories.

How do I install Spk Mission Specify in Claude Code?

Run `npx skills add spec-kitty/spec-kitty --skill spk-mission-specify -a claude-code`. Or copy the skill folder (src/charter/offering/skills/spk-mission-specify in spec-kitty/spec-kitty) into .claude/skills/spk-mission-specify in your project. Claude Code loads it when a task matches its description.

How do I install Spk Mission Specify in Codex?

Run `npx skills add spec-kitty/spec-kitty --skill spk-mission-specify -a codex`. Or copy the skill folder (src/charter/offering/skills/spk-mission-specify in spec-kitty/spec-kitty) into .agents/skills/spk-mission-specify in your project. Codex loads it when a task matches its description.

Can I use Spk Mission Specify 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 spec-kitty/spec-kitty --skill spk-mission-specify -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/spk-mission-specify, .gemini/skills/spk-mission-specify, .github/skills/spk-mission-specify and .opencode/skills/spk-mission-specify in your project.

What does Spk Mission Specify need to run?

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

Does Spk Mission Specify 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 Spk Mission Specify 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 Spk Mission Specify use?

Spk Mission Specify is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Spk Mission Specify use?

About 269 tokens (SKILL.md is roughly 1.1k 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 Spk Mission Specify?

Skills that share tags, products or a category with Spk Mission Specify: User Story Writer (deanpeters/Product-Manager-Skills, 7.2k stars), Ralph Tui Create Beads (subsy/ralph-tui, 2.5k stars), Agile Product Owner (alirezarezvani/claude-skills, 28k stars) and Ralph Tui Create Beads Rust (subsy/ralph-tui, 2.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Spk Mission Specify?

spec-kitty (a GitHub organization) maintains it in spec-kitty/spec-kitty, which has 1,678 GitHub stars. The repository holds 45 skills in this directory. The repository was last updated on October 10, 2026.

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