Agent skill

Ss Plan

by Serial-Studio in Serial-Studio/Serial-Studio

Phase 2 of Serial Studio's spec-driven workflow: turn an approved spec.md into a technical design (plan.md) — files, data flow, hotpath/threading impact, tradeoffs, risks, test plan.

Custom licenceAuto-check passedTesting & QA

Install Ss Plan

skills CLI

$ npx skills add Serial-Studio/Serial-Studio --skill ss-plan -a claude-code

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

GitHub CLI

$ gh skill install Serial-Studio/Serial-Studio ss-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/Serial-Studio/Serial-Studio.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/ss-plan .claude/skills/ss-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/

Paste into Claude Code

Install the "ss-plan" agent skill from https://github.com/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan into .claude/skills/ss-plan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ss-plan", 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/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan

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 Serial-Studio/Serial-Studio --skill ss-plan -a codex

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

GitHub CLI

$ gh skill install Serial-Studio/Serial-Studio ss-plan --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/Serial-Studio/Serial-Studio.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/ss-plan .agents/skills/ss-plan && 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 "ss-plan" agent skill from https://github.com/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan into .agents/skills/ss-plan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ss-plan", 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 Serial-Studio/Serial-Studio --skill ss-plan -a cursor

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

GitHub CLI

$ gh skill install Serial-Studio/Serial-Studio ss-plan --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/Serial-Studio/Serial-Studio.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/ss-plan .cursor/skills/ss-plan && 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 "ss-plan" agent skill from https://github.com/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan into .cursor/skills/ss-plan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ss-plan", 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/Serial-Studio/Serial-Studio.git --path .claude/skills/ss-plan

--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 Serial-Studio/Serial-Studio --skill ss-plan -a gemini-cli

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

GitHub CLI

$ gh skill install Serial-Studio/Serial-Studio ss-plan --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/Serial-Studio/Serial-Studio.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/ss-plan .gemini/skills/ss-plan && 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 "ss-plan" agent skill from https://github.com/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan into .gemini/skills/ss-plan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ss-plan", 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 Serial-Studio/Serial-Studio ss-plan

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 Serial-Studio/Serial-Studio --skill ss-plan -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/Serial-Studio/Serial-Studio.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/ss-plan .github/skills/ss-plan && 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 "ss-plan" agent skill from https://github.com/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan into .github/skills/ss-plan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ss-plan", 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 Serial-Studio/Serial-Studio --skill ss-plan -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 Serial-Studio/Serial-Studio ss-plan --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/Serial-Studio/Serial-Studio.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/ss-plan .opencode/skills/ss-plan && 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 "ss-plan" agent skill from https://github.com/Serial-Studio/Serial-Studio/tree/master/.claude/skills/ss-plan into .opencode/skills/ss-plan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ss-plan", 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: ss-plan
GitHub stars: 7.2k
Token cost: ~994 tokens
SKILL.md length: 448 words
Files: 1
Skills in repo: 15
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Phase 2 of Serial Studio's spec-driven workflow: turn an approved spec.md into a technical design (plan.md) — files, data flow, hotpath/threading impact, tradeoffs, risks, test plan.

Works in 6 steps: Read the spec in full. Every requirement… → Read the ground truth — do not design… → Copy the template and write the plan → …
Tasks that involve Spec-driven development
SKILL.md covers Preconditions, Procedure, Gate and Rules
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Ss Plan is an agent skill from Serial-Studio/Serial-Studio. Phase 2 of Serial Studio's spec-driven workflow: turn an approved spec.md into a technical design (plan.md) — files, data flow, hotpath/threading impact, tradeoffs, risks, test plan. Use after /ss-spec is approved, or "plan this spec", "design the implementation". Reads the doc/claude sub-docs and the real code; gates on human approval before /ss-tasks.

Its SKILL.md is about 990 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 Testing & QA, covering Spec-driven development and Test generation. The repository describes itself as: Open-source telemetry dashboard. Supports UART, BLE, MQTT, Modbus, CAN Bus and more.

When your agent uses it

Tasks that involve Spec-driven development
Tasks that involve Test generation

Example prompts

“plan this spec”
“design the implementation”
“/ss-plan”

Workflow steps

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

Read the spec in full. Every requirement and acceptance criterion is a target the plan
Read the ground truth — do not design from memory. Read the relevant doc/claude/
Copy the template and write the plan
Diverge before you converge. Before settling on a design, sketch 2-3 named candidate
Surface tradeoffs as decisions, up front. Where two reasonable designs diverge on
Map every acceptance criterion to a check in the Test & verification plan — pytest

What it can do on your machine

Read from SKILL.md and the folder at commit 3657d2c. 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 bash).
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

Ss Plan loads about 994 tokens when it runs. Until then it costs about 91 tokens; SKILL.md has 448 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~91
When it runs · the whole SKILL.md, loaded when a task matches: ~994

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 448 words (~994 tokens).

“Turn the approved spec.md into a concrete technical design. This is the HOW: which files, which subsystems, how data and threads move, and which design was chosen over which alternatives. See doc/claude/spec-driven.md for the gate discipline.”

— opening of SKILL.md by Serial-Studio, Custom licence

name: ss-plan
argument-hint: [spec number or slug]

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/ss-plan of Serial-Studio/Serial-Studio.

Open the folder on GitHubat commit 3657d2c

Compare with similar skills

Ss 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.

Ss Plan compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Ss Plan this skillSerial-Studio/Serial-Studio	7.2k	—	~994	Automated safety check: Pass	Custom licence	today
Vibe Adversarial Test Generationash1794/vibe-engineering	163	—	~1.4k	Automated safety check: Pass	MIT	today
Spec Driven Workflowalirezarezvani/claude-skills	28k	—	~3.9k	Automated safety check: Pass	MIT	1 mo ago
Map TDDazalio/map-framework	156	—	~6k	Automated safety check: Pass	MIT	today
Eval Triage And Improvementmicrosoft/eval-guide	138	—	~5.9k	Automated safety check: Pass	MIT	3 mo ago
Tapd Story ImplementTencentBlueKing/bk-bcs	840	—	~1.2k	Automated safety check: Pass	Custom licence	today

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Questions about Ss Plan

What does Ss Plan do?

Phase 2 of Serial Studio's spec-driven workflow: turn an approved spec.md into a technical design (plan.md) — files, data flow, hotpath/threading impact, tradeoffs, risks, test plan. Ss Plan is an agent skill from Serial-Studio/Serial-Studio.md) — files, data flow, hotpath/threading impact, tradeoffs, risks, test plan.

When should I use Ss Plan?

Ss Plan fits situations like: tasks that involve Spec-driven development; tasks that involve Test generation.

How do I install Ss Plan in Claude Code?

Run `npx skills add Serial-Studio/Serial-Studio --skill ss-plan -a claude-code`. Or copy the skill folder (.claude/skills/ss-plan in Serial-Studio/Serial-Studio) into .claude/skills/ss-plan in your project. Claude Code loads it when a task matches its description.

How do I install Ss Plan in Codex?

Run `npx skills add Serial-Studio/Serial-Studio --skill ss-plan -a codex`. Or copy the skill folder (.claude/skills/ss-plan in Serial-Studio/Serial-Studio) into .agents/skills/ss-plan in your project. Codex loads it when a task matches its description.

Can I use Ss 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 Serial-Studio/Serial-Studio --skill ss-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/ss-plan, .gemini/skills/ss-plan, .github/skills/ss-plan and .opencode/skills/ss-plan in your project.

What does Ss Plan need to run?

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

Does Ss 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 Ss 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 Ss Plan use?

Ss Plan 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 Ss Plan use?

About 994 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 Ss Plan?

Skills that share tags, products or a category with Ss Plan: Vibe Adversarial Test Generation (ash1794/vibe-engineering, 163 stars), Spec Driven Workflow (alirezarezvani/claude-skills, 28k stars), Map TDD (azalio/map-framework, 156 stars) and Eval Triage And Improvement (microsoft/eval-guide, 138 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ss Plan?

Serial-Studio (a GitHub organization) maintains it in Serial-Studio/Serial-Studio, which has 7,225 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on October 7, 2026.

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

Ss Plan

Install Ss Plan

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

Files

Compare with similar skills

Similar skills

Vibe Adversarial Test Generation

Spec Driven Workflow

Map TDD

Eval Triage And Improvement

Tapd Story Implement

Skill Test

More from Serial-Studio/Serial-Studio

Qt Cpp Review

Qt Qml Review

Ss Spec

Cpp Compiler Flags

Ss Cpp Modern

Ss Docs

Questions about Ss Plan

Install Ss Plan

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

Files

Compare with similar skills

Similar skills

More from Serial-Studio/Serial-Studio

Related

Questions about Ss Plan