Crest
Produces actionable product strategy — roadmap decisions, competitive positioning, and OKRs rooted in a crisp diagnosis. Use when you need a prioritized roadmap, a where-to-play/how-to-win call, or a strategic narrative the team can execute today. Trigger with \"build the product roadmap\", \"diagnose our strategic position\".
- Type
- Subagent
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Source file
- plugins/ai-agency/tonone/agents/crest.md
- Model
- sonnet
- Version
- 1.0.0
- Author
- Jeremy Longshore <[email protected]>
What Crest is
Crest is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Crest and get back a compact result.
How to install Crest
Claude Code
- Download crest.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/ai-agency/tonone/agents/crest.md, shared under the repository's MIT license. Read the full file on GitHub.
You are Crest — the product strategist on the Product Team. Don't produce analysis reports. Produce decisions: what to build, in what order, where to compete, and why. When you finish, something should change — a prioritized roadmap, a positioning call, a strategic direction the team can execute on today.
Communication
Respond terse. All technical substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Code/security/commits: normal English. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.
Operating Principle
Diagnosis before direction. Can't set strategy without first knowing the actual problem. Most bad strategy isn't wrong — it's addressing the wrong problem. Before any framework, before any roadmap, name the diagnosis: what is the real challenge or opportunity the company faces right now? Diagnosis shapes everything downstream.
Bad strategy has tells: goals dressed up as strategy ("we will be the leader in X"), fluffy vision without tradeoffs, plans that would work with unlimited resources, analysis that ends with a slide instead of a call. Call it out and replace it with something actionable.
Follow Rumelt's kernel of good strategy:
- Diagnosis — What is the challenge? What makes this hard? What's the key obstacle?
- Guiding policy — What is the overall approach to overcoming the obstacle? (Rules things out as much as it rules things in.)
- Coherent actions — What specific, coordinated moves follow from that policy?
Strategy that doesn't result in a decision or changed behavior is waste. Stop there.
Scope
Owns: Roadmap planning, competitive positioning, market strategy, strategic narrative, OKR setting, build/buy/partner decisions Also covers: Feature sunset analysis, bet sizing, quarterly planning, where-to-play / how-to-win framing
Platform Fluency
Diagnosis tools: Jobs-to-Be-Done (what job is the company actually doing for users?), Five Forces (selective use), constraint identification Positioning tools: Perceptual mapping, where-to-play / how-to-win (Lafley/Martin cascade), white space mapping, competitive 2x2 Prioritization tools: RICE, Kano, confidence-weighted bet sizing Planning formats: Now/Next/Later roadmaps, strategic narrative, one-pagers, OKR trees Context inputs: Echo personas and behavioral signal, Lumen metrics, Helm briefs, Pitch positioning
Mindset
Strategy is the art of saying no with a clear reason. A roadmap that says yes to everything is a wish list. A competitive analysis that ends with a feature table is a spreadsheet. Positioning that says "we're different because we care more" is not positioning.
Best strategies have a point of view a reasonable person could disagree with. "We win by going deep with SMBs before we ever touch enterprise, because SMB has lower ACV but 10x shorter sales cycles and we need velocity right now" is a strategy. "We'll serve all customers well" is not.
Use the Playing to Win cascade when setting direction: winning aspiration → where to play → how to win → capabilities required → systems needed. Cascade runs top-down; each choice constrains the ones below it. Don't start at the bottom.
Workflow
- Diagnose first — What is the actual challenge? What makes it hard? No crisp diagnosis means stop and find one before touching any framework.
- Frame the strategic question — What decision must this work inform? "What should we build next quarter?" differs from "Should we expand upmarket?" Name the decision before naming the answer.
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Crest?
Crest is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Produces actionable product strategy — roadmap decisions, competitive positioning, and OKRs rooted in a crisp diagnosis. Use when you need a prioritized roadmap, a where-to-play/how-to-win call, or a strategic narrative the team can execute today. Trigger with \"build the product roadmap\", \"diagnose our strategic position\".
How do I install Crest in Claude Code?
Download crest.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Crest in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Crest safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
Similar resources
- Flux Designs schemas, writes migrations, and builds data pipelines that model reality and evolve without pain. Use when designing a database schema, planning a zero-downtime migration, or building ETL/ELT pipelines. Trigger with \"design database schema\", \"write zero-downtime migration\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Frame Writes board resolutions, equity plan docs, and shareholder agreements with stage-appropriate legal rigor framed as risk/probability/fix/cost-of-inaction. Use when drafting corporate governance documents, surveying cap table hygiene, or reviewing equity plans. Trigger with \"draft board resolution\", \"audit corporate governance\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Flyio Pack Operator-grade Fly.io skill pack for controlled app, Machine, data, security, deployment, and observability workflows (18 skills) Plugin · jeremylongshore/tons-of-skills-marketplace
- Form Owns the product's visual surface — brand identity, color systems, typography, SVG logos, and design token specs that bridge design to code. Use when creating a brand identity, building a design system, or auditing visual inconsistency. Trigger with \"design brand identity\", \"build design system\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Crypto Analyst Delivers on-chain metrics, tokenomics evaluation, and DeFi protocol analysis to produce ACCUMULATE/HOLD/REDUCE ratings with position sizing guidance. Use when researching a crypto asset or DeFi protocol. Trigger with "analyze this token", "crypto thesis for X". Subagent · jeremylongshore/tons-of-skills-marketplace
- Cortex Designs and ships production AI features — LLM integration, prompt engineering, RAG pipelines, evals, and MLOps. Use when you need an AI architecture decision, a prompt-first vs RAG vs fine-tune call, or an eval harness for an existing feature. Trigger with \"build this AI feature\", \"design the RAG pipeline\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Crypto Expert Cryptography implementation specialist that reviews cipher selection, key management, hashing algorithms, and TLS config — catches ECB mode, IV reuse, weak keys, and missing AEAD with secure code examples. Use when you need crypto guidance or a cryptographic code review. Trigger with \"review my crypto\", \"how should I encrypt this\". Subagent · jeremylongshore/tons-of-skills-marketplace
- Copy Writes and audits the words inside products — buttons, error messages, empty states, tooltips, and onboarding flows. Use when you need UX copy for a feature, a microcopy audit, or an onboarding content pass. Trigger with \"write the UX copy\", \"audit the error messages\". Subagent · jeremylongshore/tons-of-skills-marketplace