Agent skill

Tool Foundation Sprint Differentiation

by product-on-purpose in product-on-purpose/pm-skills

Day 1 afternoon move of a Foundation Sprint. An agent skill from product-on-purpose/pm-skills.

Apache-2.0Auto-check passedData & Analytics

Install Tool Foundation Sprint Differentiation

skills CLI
$ npx skills add product-on-purpose/pm-skills --skill tool-foundation-sprint-differentiation -a claude-code

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

GitHub CLI
$ gh skill install product-on-purpose/pm-skills tool-foundation-sprint-differentiation --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/product-on-purpose/pm-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/tool-foundation-sprint-differentiation .claude/skills/tool-foundation-sprint-differentiation && 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
tool-foundation-sprint-differentiation
GitHub stars
716
Token cost
~2.2k tokens
SKILL.md length
1,047 words
Files
4 (incl. references)
Skills in repo
68
Repo updated
First seen
Licence
Apache-2.0

At a glance

Day 1 afternoon move of a Foundation Sprint. An agent skill from product-on-purpose/pm-skills.

  • Works in 6 steps: Generate differentiator candidates… → Score candidates (25-40 min) → Choose two differentiators (30-45 min… → …
  • Tasks that involve Data visualization
  • SKILL.md covers When to Use, When NOT to Use, What This Skill Produces and Sequence (150 minutes), plus 6 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Tool Foundation Sprint Differentiation is an agent skill from product-on-purpose/pm-skills. Day 1 afternoon move of a Foundation Sprint. Converts the morning's Basics frame into a defensible strategic position by scoring differentiator candidates against customer-perceived value, choosing two committed differentiators, plotting alternatives on a 2x2 chart, writing decision principles, and producing a one-page Mini Manifesto. Use after Basics is signed; before Approach Options the next morning.

Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `HISTORY.md`, `references/EXAMPLE.md` and `references/TEMPLATE.md`).

It sits in Data & Analytics, covering Data visualization. The repository describes itself as: 68 plug-and-play, best-practice product management skills for AI agents: 30 Triple Diamond phase + 11 foundation + 12 utility + 15 tool (Foundation Sprint + Design Sprint). Plus… The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Data visualization

Example prompts

  • “/tool-foundation-sprint-differentiation”

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Generate differentiator candidates (15-25 min)
  2. Score candidates (25-40 min)
  3. Choose two differentiators (30-45 min via note-and-vote)
  4. Plot the 2x2 chart (15-25 min)
  5. Write decision principles (20-30 min)
  6. Mini Manifesto (15-25 min)

What it can do on your machine

Read from SKILL.md and the folder at commit 1cef1a9. 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

Tool Foundation Sprint Differentiation loads about 2.2k tokens when it runs, and up to ~4.6k if it reads all its reference files. Until then it costs about 111 tokens; SKILL.md has 1,047 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~111
When it runs · the whole SKILL.md, loaded when a task matches
~2.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~4.6k

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 product-on-purpose/pm-skills at commit 1cef1a9, republished under its Apache-2.0 licence (© product-on-purpose). 1,047 words, ~2,207 tokens.

Download SKILL.mdSave it as .claude/skills/tool-foundation-sprint-differentiation/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
tool-foundation-sprint-differentiation
description
Day 1 afternoon move of a Foundation Sprint. Converts the morning's Basics frame into a defensible strategic position by scoring differentiator candidates against customer-perceived value, choosing two committed differentiators, plotting alternatives on a 2x2 chart, writing decision principles, and producing a one-page Mini Manifesto. Use after Basics is signed; before Approach Options the next morning.
license
Apache-2.0
metadata.classification
tool
metadata.version
1.0.0
metadata.updated
2026-07-04
metadata.tool
foundation-sprint
metadata.move
differentiation
metadata.category
problem-framing
metadata.frameworks
foundation-sprint, click, character-note-and-vote
metadata.timebox_minutes
150
metadata.roles
facilitator, decider, pm, design
<!-- PM-Skills | https://github.com/product-on-purpose/pm-skills | Apache 2.0 -->

Foundation Sprint Differentiation

Day 1 afternoon of a Foundation Sprint. The team converts the morning's Basics frame (customer, problem, advantage, competitors) into a defensible strategic position. The output is a one-page Mini Manifesto that the team and Decider sign as the Day 1 strategic summary.

Family contract: docs/reference/skill-families/foundation-sprint-skills-contract.md. This skill is a member of foundation-sprint-skills.

When to Use

  • Day 1 afternoon of a Foundation Sprint, immediately after lunch.
  • The Basics bundled artifact is signed by the Decider; the customer, problem, advantage, and competitor map are committed.
  • The team is ready to commit to a strategic position the product will occupy.

When NOT to Use

  • Basics is unresolved or under negotiation. Differentiation depends on a stable input frame.
  • The team has already pre-chosen differentiators and just wants ratification. The skill is built for genuine decision-making; ratification theater wastes the afternoon.
  • The team has lost the room: low energy, no Decider, time pressure. Postpone or split into shorter blocks rather than rush.
  • This is a follow-up sprint and the existing differentiation still holds. Use Magic Lenses directly with the existing position.

What This Skill Produces

A single bundled artifact with five sections:

  1. Scored differentiator candidates: a table of 8-15 candidate differentiators scored on three customer-perceived dimensions (customer pull, team can deliver, hard to copy). The top scorers advance to the 2x2 chart.
  2. Two chosen differentiators: the two the team commits to as the strategic position.
  3. 2x2 differentiation chart: a customer-perceived chart plotting the chosen differentiators against the competitor set from Basics. The team's product position is named.
  4. Decision principles: 3-5 principles operationalizing the differentiation. Each principle is a future-product rule ("we will always prefer X over Y").
  5. Mini Manifesto: a one-page strategic summary written in the team's voice, naming the customer, problem, position, and what the product is NOT.

See references/TEMPLATE.md for the canonical structure and references/EXAMPLE.md for the Brainshelf example.

Sequence (150 minutes)

Step 1: Generate differentiator candidates (15-25 min)

Each team member produces 3-5 candidate differentiators silently. Cluster duplicates, then surface the full set (8-15 candidates is typical). The candidates can be classic (speed, price, simplicity, breadth, depth, trust) or custom (specific to this product or market).

Step 2: Score candidates (25-40 min)

Score each candidate on three dimensions, 1-5 scale:

  • Customer pull: would this customer-perceived dimension actually drive a switch?
  • Team can deliver: can this team build and operate at this dimension competitively?
  • Hard to copy: how durable is the advantage if a competitor pivots?

Sum the three for a rough score. Top 5-7 candidates advance.

Step 3: Choose two differentiators (30-45 min via note-and-vote)

The team narrows to two differentiators through tool-note-and-vote. The two MUST be observable to the customer (not internal-team values) and deliverable by the team (not aspirational). The Decider supervotes if scoring produces a tie or the team is split.

Step 4: Plot the 2x2 chart (15-25 min)

Place the two differentiators as the chart axes. Plot the competitor set from Basics (including "do nothing"). Position the product where it can occupy unoccupied space. If the unoccupied position is too far from where competitors cluster, the team may be drifting into a niche that customers don't recognize; if the position overlaps with a strong competitor, the differentiation is not strong enough.

Step 5: Write decision principles (20-30 min)

Convert the two differentiators into 3-5 operational principles. Examples:

  • "Capture is the first-class action. Every other feature waits behind a fast capture path."
  • "Private by default. Sharing is opt-in."
  • "Surface what's relevant when it matters. Not on a notification schedule."

Principles are NOT marketing copy. They are decision-making rules for future product calls.

Step 6: Mini Manifesto (15-25 min)

The Decider drafts a one-page Mini Manifesto in the team's voice. Tone is plain, declarative, and direct about what the product is NOT (this is the part teams skip and shouldn't).

Show full SKILL.md (409 more words)Show less

Inference Inputs

InputWhat the skill does with it
Basics bundled artifactReads target customer (for "customer-perceived" check), problem (for "would this differentiator solve the problem"), advantages (for "can the team deliver"), and competitor map (for chart plotting)
Differentiation candidatesIf pre-supplied, pre-populates the silent ideation board; otherwise the team generates them in Step 1

Common Pitfalls

  • Marketing-claim differentiators the product cannot deliver. "Best in class," "AI-powered," "delightful" are not differentiators; they are aspirations. The skill rejects these and prompts for evidence the team can deliver.
  • Differentiators that are not customer-perceived. "Beautifully architected code" matters to engineers, not customers. The skill enforces a "would a customer notice this in 30 seconds?" check.
  • Generic decision principles. "Simple" and "fast" do not operationalize anything. Principles must be actionable: "we will choose X over Y."
  • Treating chart, principles, and manifesto as separable artifacts. The chart positions the product; the principles operationalize the position; the manifesto communicates it. Without coherence, the Day 1 PM output is a pile of decks rather than a strategic summary.
  • Skipping the Mini Manifesto. Many teams stop after the chart. The manifesto matters because it forces the team to write what the product IS NOT, which is the test of whether the differentiation is real.

Decider Role

The Decider's responsibilities during Differentiation:

  1. Confirm Basics is signed before this skill begins.
  2. Listen during scoring without telegraphing preferences.
  3. Supervote the two committed differentiators with rationale if the team is split.
  4. Author or co-author the Mini Manifesto (it carries the Decider's voice).
  5. Sign off on the bundled artifact before Day 1 ends.

Canonical Sources

  • Character Capital. "Foundation Sprint guide." Differentiation agenda and Mini Manifesto framing.
  • Knapp, J., and Zeratsky, J. Click. Day 1 afternoon sequence and differentiation discipline.
  • Knapp, J., and Zeratsky, J. "Introducing the Foundation Sprint." Lenny's Newsletter. Differentiation section and chart logic.

Cross-Skill Usage

Prerequisites: tool-foundation-sprint-basics. The Basics bundled artifact is the load-bearing input.

The skill invokes tool-note-and-vote at least once (to choose the two differentiators). Additional note-and-vote invocations may happen for the principles list if the team is split.

Next invocation: tool-foundation-sprint-approach-options on Day 2 morning. The chosen differentiators and the decision principles constrain which approach options are in-scope.

Decider Checkpoint

This skill ends with a Decider Checkpoint in references/TEMPLATE.md. The Decider signs off on the two differentiators, the 2x2 position, the principles, and the Mini Manifesto as the Day 1 strategic summary. Without sign-off, Day 2 starts on an unstable strategic foundation.

© product-on-purpose, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in skills/tool-foundation-sprint-differentiation of product-on-purpose/pm-skills.

  • SKILL.md
  • HISTORY.md
  • references/EXAMPLE.md
  • references/TEMPLATE.md

Open the folder on GitHubat commit 1cef1a9

Compare with similar skills

Tool Foundation Sprint Differentiation 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.

Tool Foundation Sprint Differentiation compared with similar skills
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SeabornzLanqing/codex-claude-academic-skills4.7k15 repos~4.9kAutomated safety check: PassBSD-3-Clause
Plot From DataTrae1ounG/paper-plot-skills8721 repos~583Automated safety check: PassNone

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Questions about Tool Foundation Sprint Differentiation

What does Tool Foundation Sprint Differentiation do?

Day 1 afternoon move of a Foundation Sprint. An agent skill from product-on-purpose/pm-skills. Tool Foundation Sprint Differentiation is an agent skill from product-on-purpose/pm-skills. Day 1 afternoon move of a Foundation Sprint.

When should I use Tool Foundation Sprint Differentiation?

Tool Foundation Sprint Differentiation fits situations like: tasks that involve Data visualization.

How do I install Tool Foundation Sprint Differentiation in Claude Code?

Run `npx skills add product-on-purpose/pm-skills --skill tool-foundation-sprint-differentiation -a claude-code`. Or copy the skill folder (skills/tool-foundation-sprint-differentiation in product-on-purpose/pm-skills) into .claude/skills/tool-foundation-sprint-differentiation in your project. Claude Code loads it when a task matches its description.

How do I install Tool Foundation Sprint Differentiation in Codex?

Run `npx skills add product-on-purpose/pm-skills --skill tool-foundation-sprint-differentiation -a codex`. Or copy the skill folder (skills/tool-foundation-sprint-differentiation in product-on-purpose/pm-skills) into .agents/skills/tool-foundation-sprint-differentiation in your project. Codex loads it when a task matches its description.

Can I use Tool Foundation Sprint Differentiation 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 product-on-purpose/pm-skills --skill tool-foundation-sprint-differentiation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tool-foundation-sprint-differentiation, .gemini/skills/tool-foundation-sprint-differentiation, .github/skills/tool-foundation-sprint-differentiation and .opencode/skills/tool-foundation-sprint-differentiation in your project.

What does Tool Foundation Sprint Differentiation need to run?

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

Does Tool Foundation Sprint Differentiation 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 Tool Foundation Sprint Differentiation 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 Tool Foundation Sprint Differentiation use?

Tool Foundation Sprint Differentiation is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Tool Foundation Sprint Differentiation use?

About 2.2k tokens (SKILL.md is roughly 8.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.4k tokens, read only when the agent opens those files.

What are the alternatives to Tool Foundation Sprint Differentiation?

Skills that share tags, products or a category with Tool Foundation Sprint Differentiation: Matplotlib (zLanqing/codex-claude-academic-skills, 4.7k stars), Chart Visualization (bytedance/deer-flow, 84k stars), Scientific Visualization (mims-harvard/OptimusKG, 147 stars) and Seaborn (zLanqing/codex-claude-academic-skills, 4.7k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Tool Foundation Sprint Differentiation?

product-on-purpose (a GitHub organization) maintains it in product-on-purpose/pm-skills, which has 716 GitHub stars. The repository holds 68 skills in this directory. The repository was last updated on October 8, 2026.

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