Product Competitive Analysis
Fokkyp/claude-skills
Produces product-manager competitive analysis reports in Chinese, with a confirm-first scoping gate, three-phase evidence collection and single or multi-product modes.
Product discovery and market research expert. An agent skill from majiayu000/spellbook.
$ npx skills add majiayu000/spellbook --skill product-discovery -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install majiayu000/spellbook product-discovery --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/majiayu000/spellbook.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/product-discovery .claude/skills/product-discovery && 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 "product-discovery" agent skill from https://github.com/majiayu000/spellbook/tree/main/skills/product-discovery into .claude/skills/product-discovery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "product-discovery", 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/majiayu000/spellbook/tree/main/skills/product-discoveryType 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 majiayu000/spellbook --skill product-discovery -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install majiayu000/spellbook product-discovery --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/spellbook.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/product-discovery .agents/skills/product-discovery && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "product-discovery" agent skill from https://github.com/majiayu000/spellbook/tree/main/skills/product-discovery into .agents/skills/product-discovery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "product-discovery", 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 majiayu000/spellbook --skill product-discovery -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install majiayu000/spellbook product-discovery --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/spellbook.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/product-discovery .cursor/skills/product-discovery && 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 "product-discovery" agent skill from https://github.com/majiayu000/spellbook/tree/main/skills/product-discovery into .cursor/skills/product-discovery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "product-discovery", 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/majiayu000/spellbook.git --path skills/product-discovery--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 majiayu000/spellbook --skill product-discovery -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install majiayu000/spellbook product-discovery --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/spellbook.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/product-discovery .gemini/skills/product-discovery && 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 "product-discovery" agent skill from https://github.com/majiayu000/spellbook/tree/main/skills/product-discovery into .gemini/skills/product-discovery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "product-discovery", 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 majiayu000/spellbook product-discoveryInstalls 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 majiayu000/spellbook --skill product-discovery -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/majiayu000/spellbook.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/product-discovery .github/skills/product-discovery && 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 "product-discovery" agent skill from https://github.com/majiayu000/spellbook/tree/main/skills/product-discovery into .github/skills/product-discovery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "product-discovery", 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 majiayu000/spellbook --skill product-discovery -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install majiayu000/spellbook product-discovery --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/spellbook.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/product-discovery .opencode/skills/product-discovery && 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 "product-discovery" agent skill from https://github.com/majiayu000/spellbook/tree/main/skills/product-discovery into .opencode/skills/product-discovery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "product-discovery", 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.
product-discoveryProduct discovery and market research expert. An agent skill from majiayu000/spellbook.
Product Discovery is an agent skill from majiayu000/spellbook. Product discovery and market research expert. Use when validating product ideas, conducting market research, user interviews, competitive analysis, or opportunity assessment. Covers JTBD, Kano model, and Value Proposition Canvas.
Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files (for example `reference/competitive-analysis.md`, `reference/extended.md` and `reference/market-research.md`).
It sits in Product & Project Management, covering User research, Prioritization frameworks and User stories. The repository describes itself as: Cross-runtime skills for Claude Code, Codex, and multi-agent workflows. The licence is MIT.
Read from SKILL.md and the folder at commit ed52af7. It shows what the files ask for, not the result of running them.
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.
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Product Discovery loads about 3.3k tokens when it runs. Until then it costs about 62 tokens; SKILL.md has 333 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.
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.
The full file from majiayu000/spellbook at commit ed52af7, republished under its MIT licence (© majiayu000). 333 words, ~3,283 tokens.
.claude/skills/product-discovery/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.These rules are mandatory. Violating them means the skill is not working correctly.
Never start with a solution. Always define the problem and outcome first.
❌ FORBIDDEN:
"We should build a search bar for the product page"
"Let's add AI recommendations"
"Users need a mobile app"
✅ REQUIRED:
"Problem: Users can't find products (40% exit rate on catalog)
Outcome: Reduce exit rate to 20%
Possible solutions:
1. Search bar with filters
2. AI-powered recommendations
3. Better category navigation
4. Visual product browsing"Never assume user needs without evidence from real user research.
❌ FORBIDDEN:
- "Users probably want X" (assumption without data)
- "Our competitor has X, so we need it too" (copycat without validation)
- "The CEO thinks we should build X" (HiPPO without evidence)
- "It's obvious users need X" (intuition without validation)
✅ REQUIRED:
- "5 out of 8 interviewed users mentioned X as a pain point"
- "Analytics show 60% of users abandon at step 3"
- "Prototype test: 7/10 users completed task successfully"
- "Survey (n=500): 45% rated feature as 'must have'"Never validate a problem with fewer than 5 user interviews per segment.
❌ FORBIDDEN:
- "We talked to 2 users and they loved the idea"
- "One customer requested this feature"
- "Based on a quick chat with sales..."
✅ REQUIRED:
| Segment | Interviews | Key Finding |
|---------|------------|-------------|
| Power Users | 6 | 5/6 struggle with X |
| New Users | 5 | 4/5 drop off at onboarding |
| Churned | 5 | 3/5 cited missing feature Y |
Minimum per segment: 5 interviews
Confidence increases with more interviewsEvery assumption must be testable and falsifiable with clear success criteria.
❌ FORBIDDEN:
- "Users will like the new design" (not falsifiable)
- "This will improve engagement" (no success criteria)
- "The feature will be useful" (vague)
✅ REQUIRED:
| Assumption | Test | Success Criteria | Result |
|------------|------|------------------|--------|
| Users will complete onboarding in new flow | Prototype test with 10 users | >70% completion | TBD |
| Users prefer visual search | A/B test | >10% lift in conversions | TBD |
| Price point is acceptable | Landing page test | >3% conversion | TBD || Scenario | Framework/Tool | Output |
|---|---|---|
| Validate product idea | Product Opportunity Assessment | Go/no-go decision |
| Size market opportunity | TAM/SAM/SOM | Market size estimates |
| Understand user needs | User Research (interviews, surveys) | User insights, pain points |
| Analyze competition | Competitive Analysis | Competitive landscape map |
| Discover user motivations | Jobs-to-be-Done (JTBD) | Job stories, outcomes |
| Prioritize features | Kano Model | Feature categorization |
| Define value proposition | Value Proposition Canvas | Value prop statement |
| Test product concept | Lean Startup / MVP | Validated learnings |
| Map opportunities | Opportunity Solution Tree | Prioritized opportunities |
Discovery is led by three roles working together weekly:
Product Manager → Defines outcomes, owns roadmap
Designer → Explores solutions, tests usability
Engineer → Assesses feasibility, proposes technical solutions## 1. Customer Interviews (Weekly)
- Schedule 3-5 interviews per week minimum
- Mix of current users, churned users, prospects
- Focus on understanding problems, not pitching solutions
- Record and share insights with team
## 2. Assumption Testing (Weekly)
- Identify riskiest assumptions about solutions
- Design quick tests (prototypes, landing pages, fake doors)
- Run experiments with real users
- Measure results against success criteria
## 3. Opportunity Mapping (Ongoing)
- Build opportunity solution tree
- Map customer needs to potential solutions
- Prioritize based on impact and feasibility
- Update as you learnDiscovery (What to Build) Delivery (How to Build It)
├─ Customer interviews ├─ Sprint planning
├─ Prototype testing ├─ Development
├─ Assumption validation ├─ QA testing
├─ Market research ├─ Deployment
└─ Opportunity assessment └─ Post-launch monitoring
Key difference: Discovery reduces risk BEFORE committing to buildBefore starting any product initiative, answer these questions:
## 1. Problem Definition
**What problem are we solving?**
- Be specific and measurable
- Validate it's a real problem (not assumed)
## 2. Target Market
**For whom are we solving this problem?**
- Define specific user segments
- Size the addressable market (TAM/SAM/SOM)
## 3. Opportunity Size
**How big is the opportunity?**
- Revenue potential
- User growth potential
- Strategic value
## 4. Success Metrics
**How will we measure success?**
- Leading indicators (usage, engagement)
- Lagging indicators (revenue, retention)
- Define targets upfront
## 5. Alternative Solutions
**What alternatives exist today?**
- Direct competitors
- Indirect solutions
- Current user workarounds
## 6. Our Advantage
**Why are we best suited to solve this?**
- Unique capabilities
- Market position
- Technical advantages
## 7. Strategic Fit
**Why now? Why us?**
- Market timing
- Strategic alignment
- Resource availability
## 8. Dependencies
**What do we need to succeed?**
- Technical dependencies
- Partnership requirements
- Regulatory considerations
## 9. Risks
**What could go wrong?**
- Market risk (will anyone want it?)
- Execution risk (can we build it?)
- Monetization risk (will they pay?)
## 10. Cost of Delay
**What happens if we don't build this?**
- Competitive disadvantage
- Lost revenue
- Market opportunity windowQuick prioritization of opportunities:
High Value, Low Effort → Do First (Quick Wins)
High Value, High Effort → Plan Strategically (Big Bets)
Low Value, Low Effort → Do Later (Fill Gaps)
Low Value, High Effort → Don't Do (Money Pit)## Generative Research (What problems exist?)
Use when: Starting new product area, exploring unknown space
Methods:
- Ethnographic field studies
- Contextual inquiry
- Diary studies
- Open-ended interviews
## Evaluative Research (Does our solution work?)
Use when: Testing specific solutions, validating designs
Methods:
- Usability testing
- Prototype testing
- A/B testing
- Concept testing
## Quantitative Research (How much? How many?)
Use when: Need statistical validation, measuring impact
Methods:
- Surveys
- Analytics analysis
- A/B experiments
- Market sizing
## Qualitative Research (Why? How?)
Use when: Understanding motivations, uncovering insights
Methods:
- User interviews
- Focus groups
- Customer advisory boards
- User observation## Preparation
- Define research goals and hypotheses
- Create interview guide (but stay flexible)
- Recruit right participants (6-8 per segment)
- Schedule 45-60 min sessions
## During Interview
✓ Ask open-ended questions ("Tell me about...")
✓ Follow up with "Why?" 5 times to get to root cause
✓ Listen more than talk (80/20 rule)
✓ Ask about past behavior, not future hypotheticals
✓ Look for workarounds and pain points
✓ Record and take notes
✗ Don't ask leading questions
✗ Don't pitch your solution
✗ Don't ask "Would you use X?" (people lie)
✗ Don't multi-task while interviewing
## Example Questions
- "Walk me through the last time you [did task]"
- "What's most frustrating about [current solution]?"
- "How are you solving this problem today?"
- "What would make [task] easier for you?"
- "Tell me more about that..."## When to Survey
✓ Validate findings from qualitative research
✓ Measure satisfaction or sentiment at scale
✓ Prioritize features (Kano surveys)
✓ Segment users by behavior/needs
## Survey Design
- Keep it short (<10 min to complete)
- One question per screen on mobile
- Mix question types (multiple choice, scale, open-ended)
- Avoid leading or biased questions
- Test survey with 5 people before sending
## Question Types
- Multiple choice → Segmentation, categorization
- Likert scale (1-5) → Satisfaction, importance
- Open-ended → Qualitative insights
- Ranking → Prioritization
- NPS (0-10) → Loyalty measurement
## Distribution
- In-app surveys (high response, biased to engaged users)
- Email surveys (broader reach, lower response)
- Incentivize thoughtful responses ($10 gift card, early access)
- Follow up with interviews for interesting responses## AI Tools for Discovery
- **Insight synthesis** — AI analyzes interview transcripts, identifies patterns
- **Synthetic personas** — AI-generated user proxies for rapid testing
- **Market intelligence** — AI tracks competitor moves, pricing changes
- **Survey analysis** — Automated sentiment analysis, theme extraction
- **Trend detection** — AI identifies emerging market trends early
## Examples
- Crayon → Competitive intelligence automation
- Glimpse → Trend detection from web data
- Delve AI → Automated persona creation
- Attest → AI-powered survey insights
- Quantilope → Machine learning research automation
## Best Practices
✓ Use AI to scale research, not replace human insight
✓ Validate AI findings with real user conversations
✓ Combine AI analysis with qualitative depth
✗ Don't rely solely on synthetic users
✗ Don't skip talking to real customers## Modern Approach
- Discovery is embedded in every sprint, not a phase
- Weekly user touchpoints (interviews, tests, feedback)
- Rapid experimentation (dozens of tests running)
- Fast pivots based on evidence (days, not months)
## Team Structure
- Product trios own discovery for their area
- Centralized research team supports (tools, methods)
- Customer success shares feedback loop
- Data analysts provide quantitative insights
## Cadence
- Weekly: Customer interviews, prototype tests
- Bi-weekly: Opportunity review, assumption validation
- Monthly: Market analysis, competitive review
- Quarterly: Strategic discovery (new markets, big bets)Visual framework for mapping the path from outcome to solution:
OUTCOME (Business goal)
|
┌────────┴────────┐
│ │
OPPORTUNITY 1 OPPORTUNITY 2
│ │
├─ Solution A ├─ Solution C
├─ Solution B └─ Solution D
└─ Solution C## Step 1: Define Outcome
Start with measurable business outcome
Example: "Increase Day 30 retention from 20% to 30%"
## Step 2: Map Opportunities
Discover customer needs/pain points through research
Example: "Users don't understand core features"
## Step 3: Generate Solutions
For each opportunity, brainstorm multiple solutions
Example:
- Better onboarding tutorial
- In-app tooltips
- Interactive product tour
## Step 4: Test Assumptions
For each solution, identify riskiest assumption and test
Example: "Users will complete a 5-step tutorial"
Test: Build simple prototype, test with 10 users
## Step 5: Compare Solutions
Use evidence to choose best path forward
Build what tests validate, discard what fails✓ Visualizes multiple paths to outcome
✓ Prevents jumping to first solution
✓ Encourages broad exploration before narrowing
✓ Documents why decisions were made
✓ Keeps team aligned on prioritiesDetailed material starting at ## Integrating Discovery with Delivery has been moved to reference/extended.md to keep this skill concise. Load that reference when the task requires the moved examples, command catalogs, checklists, platform details, or implementation templates.
© majiayu000, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 6 other files in skills/product-discovery of majiayu000/spellbook.
Open the folder on GitHubat commit ed52af7
Product Discovery 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 |
|---|---|---|---|---|---|---|
| Product Discovery this skillmajiayu000/spellbook | 287 | — | ~3.3k | Automated safety check: Pass | MIT | |
| Product Competitive AnalysisFokkyp/claude-skills | 226 | — | ~1.2k | Automated safety check: Pass | None | |
| Opportunity Solution Treeavelikiy/great_cto | 103 | — | ~1.8k | Automated safety check: Pass | MIT | |
| 09 Customer Insight Globalminhnv0807/ai-business-skills | 609 | — | ~3.6k | Automated safety check: Pass | MIT | |
| Mom Testwondelai/skills | 2.4k | — | ~4.2k | Automated safety check: Pass | MIT | |
| Product Manager Toolkitborghei/Claude-Skills | 891 | — | ~5.8k | Automated safety check: Pass | MIT |
Fokkyp/claude-skills
Produces product-manager competitive analysis reports in Chinese, with a confirm-first scoping gate, three-phase evidence collection and single or multi-product modes.
avelikiy/great_cto
Builds an Opportunity Solution Tree that links one measurable outcome to customer opportunities, candidate solutions and experiments.
minhnv0807/ai-business-skills
A skill your agent uses when the user needs to understand customers deeply enough to write copy and pick targeting — consumer versus shopper, JTBD, layered persona, internal monologue, pain map…
wondelai/skills
Talk to customers without leading them using Mom Test rules: discuss their life not your idea, ask about specifics in the past, and talk less.
borghei/Claude-Skills
Product manager toolkit covering RICE prioritization, customer interview analysis, PRDs, and discovery frameworks.
rand/cc-polymath
Automatically discover product management skills when working with product management, roadmap, user stories, prioritization, metrics, or product strategy.
majiayu000/spellbook
Audits and repairs how coding-agent Skills are owned, copied and exposed across runtimes, from canonical sources to quarantine and retirement.
majiayu000/spellbook
Scans a repository for real evidence and proposes, or on request writes, a small stack of root and scoped AGENTS.md files with validation commands and generated-file boundaries.
majiayu000/spellbook
Plans, produces or diagnoses evidence-backed product demo videos: script, capture plan, pacing checks and verified final media built on real product behavior.
majiayu000/spellbook
Single entry point that routes long or ambiguous agent tasks, checks live state, bounds autonomous loops and leaves a resumable handoff.
majiayu000/spellbook
Scans a repository, its lockfiles and node_modules for known malicious npm package versions and install-time indicators, using a read-only Python scanner.
majiayu000/spellbook
Product management helpers: a RICE scoring script, an interview transcript analyzer and PRD templates for prioritizing features, synthesizing research and writing requirements.
Categories
Product discovery and market research expert. An agent skill from majiayu000/spellbook. Product Discovery is an agent skill from majiayu000/spellbook. Product discovery and market research expert.
Product Discovery fits situations like: validating product ideas; conducting market research; user interviews; competitive analysis.
Run `npx skills add majiayu000/spellbook --skill product-discovery -a claude-code`. Or copy the skill folder (skills/product-discovery in majiayu000/spellbook) into .claude/skills/product-discovery in your project. Claude Code loads it when a task matches its description.
Run `npx skills add majiayu000/spellbook --skill product-discovery -a codex`. Or copy the skill folder (skills/product-discovery in majiayu000/spellbook) into .agents/skills/product-discovery in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add majiayu000/spellbook --skill product-discovery -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/product-discovery, .gemini/skills/product-discovery, .github/skills/product-discovery and .opencode/skills/product-discovery in your project.
SKILL.md names no scripts, command-line tools or credentials: Product Discovery is instructions for the agent only.
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.
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.
Product Discovery is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 3.3k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Product Discovery: Product Competitive Analysis (Fokkyp/claude-skills, 226 stars), Opportunity Solution Tree (avelikiy/great_cto, 103 stars), 09 Customer Insight Global (minhnv0807/ai-business-skills, 609 stars) and Mom Test (wondelai/skills, 2.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
majiayu000 (a GitHub user) maintains it in majiayu000/spellbook, which has 287 GitHub stars. The repository holds 97 skills in this directory. The repository was last updated on October 8, 2026.
Source: majiayu000/spellbook on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.