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Agent skill

Spk Mission Plan

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

Operate the Spec Kitty plan phase: convert a completed spec into architecture, data flow, risks, and implementation strategy.

MITAuto-check passed

Install Spk Mission Plan

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

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

GitHub CLI
$ gh skill install spec-kitty/spec-kitty spk-mission-plan --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-plan .claude/skills/spk-mission-plan && 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-plan
GitHub stars
1.7k
Token cost
~239 tokens
SKILL.md length
104 words
Files
1
Skills in repo
45
Repo updated
First seen
Licence
MIT

At a glance

Operate the Spec Kitty plan phase: convert a completed spec into architecture, data flow, risks, and implementation strategy.

  • Works in 6 steps: Invoke /spec-kitty.plan against the… → Ground the plan in the spec and existing… → Make tradeoffs explicit: interfaces,… → …
  • SKILL.md covers Flow and Guardrail
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Spk Mission Plan is an agent skill from spec-kitty/spec-kitty. Operate the Spec Kitty plan phase: convert a completed spec into architecture, data flow, risks, and implementation strategy.

Its SKILL.md is about 240 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

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.

Example prompts

  • “/spk-mission-plan”

Workflow steps

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

  1. Invoke /spec-kitty.plan against the active mission.
  2. Ground the plan in the spec and existing repo architecture.
  3. Make tradeoffs explicit: interfaces, data flow, migration needs, tests,
  4. Route research gaps to spk-mission-research.
  5. Route unclear mission type or workflow questions to spk-mission-types.
  6. For non-trivial architecture, data/control flow, boundaries, migrations, or

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 Plan loads about 239 tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 104 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~36
When it runs · the whole SKILL.md, loaded when a task matches
~239

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). 104 words, ~239 tokens.

Download SKILL.mdSave it as .claude/skills/spk-mission-plan/SKILL.md (or your agent's skills folder).
name
spk-mission-plan
description
Operate the Spec Kitty plan phase: convert a completed spec into architecture, data flow, risks, and implementation strategy.

spk-mission-plan

Use this skill when a mission has a spec and needs an implementation plan.

Flow

  1. Invoke /spec-kitty.plan against the active mission.
  2. Ground the plan in the spec and existing repo architecture.
  3. Make tradeoffs explicit: interfaces, data flow, migration needs, tests, rollout, and risks.
  4. Route research gaps to spk-mission-research.
  5. Route unclear mission type or workflow questions to spk-mission-types.
  6. For non-trivial architecture, data/control flow, boundaries, migrations, or risky interactions, load spk-practice-show-me and use diagrams where they materially reduce prose.

Guardrail

Do not let the plan silently change functional requirements. If the plan discovers a spec issue, return to spk-mission-specify.

© 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-plan of spec-kitty/spec-kitty.

Open the folder on GitHubat commit d12146f

Compare with similar skills

Spk Mission Plan 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 Plan compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Spk Mission Plan this skillspec-kitty/spec-kitty1.7k—~239Automated safety check: PassMIT
Convertremotion-dev/remotion63k—~247Automated safety check: PassCustom licence
It Operationsdavila7/claude-code-templates33k1 repos~3.7kAutomated safety check: PassMIT
Operator Approval Loopaffaan-m/ECC276k—~3.3kAutomated safety check: PassMIT
Business Operations Skillsalirezarezvani/claude-skills28k—~2.3kAutomated safety check: PassMIT
Postman Openapi Convertersickn33/agentic-awesome-skills47k1 repos~1.5kAutomated safety check: PassMIT

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Questions about Spk Mission Plan

What does Spk Mission Plan do?

Operate the Spec Kitty plan phase: convert a completed spec into architecture, data flow, risks, and implementation strategy. Spk Mission Plan is an agent skill from spec-kitty/spec-kitty. Operate the Spec Kitty plan phase: convert a completed spec into architecture, data flow, risks, and implementation strategy.

How do I install Spk Mission Plan in Claude Code?

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

How do I install Spk Mission Plan in Codex?

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

Can I use Spk Mission Plan 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-plan -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-plan, .gemini/skills/spk-mission-plan, .github/skills/spk-mission-plan and .opencode/skills/spk-mission-plan in your project.

What does Spk Mission Plan need to run?

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

Does Spk Mission Plan 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 Plan 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 Plan use?

Spk Mission Plan 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 Plan use?

About 239 tokens (SKILL.md is roughly 956 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 Plan?

Skills that share tags, products or a category with Spk Mission Plan: Convert (remotion-dev/remotion, 63k stars), It Operations (davila7/claude-code-templates, 33k stars), Operator Approval Loop (affaan-m/ECC, 276k stars) and Business Operations Skills (alirezarezvani/claude-skills, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Spk Mission Plan?

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.